./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:52:42,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:52:42,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:52:42,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:52:42,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:52:42,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:52:42,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:52:42,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:52:42,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:52:42,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:52:42,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:52:42,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:52:42,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:52:42,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:52:42,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:52:42,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:52:42,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:52:42,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:52:42,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:52:42,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:52:42,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:52:42,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:52:42,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:52:42,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:52:42,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:52:42,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:52:42,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:52:42,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:52:42,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:52:42,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:52:42,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:52:42,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:52:42,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:52:42,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:52:42,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:52:42,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:52:42,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:52:42,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:52:42,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:52:42,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:52:42,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:52:42,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:52:42,865 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:52:42,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:52:42,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:52:42,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:52:42,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:52:42,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:52:42,867 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:52:42,867 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:52:42,867 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:52:42,867 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:52:42,867 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:52:42,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:52:42,868 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:52:42,868 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:52:42,868 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:52:42,868 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:52:42,868 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:52:42,869 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:52:42,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:52:42,869 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:52:42,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:52:42,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:52:42,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:52:42,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:52:42,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:52:42,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:52:42,870 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:52:42,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:52:42,871 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:52:42,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:52:42,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:52:42,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:52:42,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:52:42,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:52:42,872 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:52:42,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:52:42,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:52:42,872 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:52:42,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:52:42,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:52:42,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:52:42,873 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_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 [2022-12-14 08:52:43,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:52:43,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:52:43,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:52:43,076 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:52:43,076 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:52:43,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops-crafted-1/in-de51.c [2022-12-14 08:52:45,646 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:52:45,780 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:52:45,780 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/sv-benchmarks/c/loops-crafted-1/in-de51.c [2022-12-14 08:52:45,784 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/data/508e19893/7e55ca9392f54f43a1d32acf42a797f3/FLAG9070314b6 [2022-12-14 08:52:45,794 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/data/508e19893/7e55ca9392f54f43a1d32acf42a797f3 [2022-12-14 08:52:45,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:52:45,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:52:45,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:52:45,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:52:45,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:52:45,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a51f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45, skipping insertion in model container [2022-12-14 08:52:45,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:52:45,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:52:45,916 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_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2022-12-14 08:52:45,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:52:45,934 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:52:45,943 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_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2022-12-14 08:52:45,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:52:45,955 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:52:45,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45 WrapperNode [2022-12-14 08:52:45,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:52:45,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:52:45,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:52:45,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:52:45,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,982 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-12-14 08:52:45,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:52:45,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:52:45,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:52:45,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:52:45,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,997 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:45,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:52:45,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:52:45,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:52:45,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:52:46,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (1/1) ... [2022-12-14 08:52:46,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:52:46,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:46,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:52:46,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:52:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:52:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:52:46,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:52:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:52:46,115 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:52:46,116 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:52:46,205 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:52:46,227 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:52:46,227 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 08:52:46,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:52:46 BoogieIcfgContainer [2022-12-14 08:52:46,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:52:46,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:52:46,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:52:46,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:52:46,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:52:45" (1/3) ... [2022-12-14 08:52:46,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24434609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:52:46, skipping insertion in model container [2022-12-14 08:52:46,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:52:45" (2/3) ... [2022-12-14 08:52:46,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24434609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:52:46, skipping insertion in model container [2022-12-14 08:52:46,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:52:46" (3/3) ... [2022-12-14 08:52:46,236 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de51.c [2022-12-14 08:52:46,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:52:46,251 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:52:46,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:52:46,291 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;@28909282, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:52:46,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:52:46,295 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) [2022-12-14 08:52:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 08:52:46,299 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:46,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:46,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:46,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1375234513, now seen corresponding path program 1 times [2022-12-14 08:52:46,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:46,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014072264] [2022-12-14 08:52:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:46,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:46,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:46,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014072264] [2022-12-14 08:52:46,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014072264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:46,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:52:46,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:52:46,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823320102] [2022-12-14 08:52:46,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:46,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:52:46,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:52:46,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:52:46,658 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) [2022-12-14 08:52:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:46,718 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-12-14 08:52:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:52:46,721 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 [2022-12-14 08:52:46,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:46,726 INFO L225 Difference]: With dead ends: 23 [2022-12-14 08:52:46,726 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 08:52:46,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:52:46,731 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:46,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:52:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 08:52:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 08:52:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 22 transitions. [2022-12-14 08:52:46,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 22 transitions. Word has length 8 [2022-12-14 08:52:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:46,756 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 22 transitions. [2022-12-14 08:52:46,756 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) [2022-12-14 08:52:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 22 transitions. [2022-12-14 08:52:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:52:46,757 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:46,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:46,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:52:46,758 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:46,758 INFO L85 PathProgramCache]: Analyzing trace with hash -348037811, now seen corresponding path program 1 times [2022-12-14 08:52:46,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:46,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301308869] [2022-12-14 08:52:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:46,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:46,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:46,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301308869] [2022-12-14 08:52:46,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301308869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:46,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:52:46,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:52:46,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094657708] [2022-12-14 08:52:46,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:46,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:52:46,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:46,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:52:46,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:52:46,787 INFO L87 Difference]: Start difference. First operand 14 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:46,817 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2022-12-14 08:52:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:52:46,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 08:52:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:46,818 INFO L225 Difference]: With dead ends: 26 [2022-12-14 08:52:46,818 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 08:52:46,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:52:46,819 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:46,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:52:46,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 08:52:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2022-12-14 08:52:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 26 transitions. [2022-12-14 08:52:46,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 26 transitions. Word has length 9 [2022-12-14 08:52:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:46,825 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 26 transitions. [2022-12-14 08:52:46,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 26 transitions. [2022-12-14 08:52:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:52:46,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:46,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:46,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:52:46,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash -318217020, now seen corresponding path program 1 times [2022-12-14 08:52:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:46,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498002801] [2022-12-14 08:52:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:46,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:46,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:46,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498002801] [2022-12-14 08:52:46,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498002801] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:46,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:52:46,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:52:46,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593342729] [2022-12-14 08:52:46,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:46,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:52:46,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:46,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:52:46,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:52:46,851 INFO L87 Difference]: Start difference. First operand 17 states and 26 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:46,882 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2022-12-14 08:52:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:52:46,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 08:52:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:46,885 INFO L225 Difference]: With dead ends: 29 [2022-12-14 08:52:46,885 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 08:52:46,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:52:46,886 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:46,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:52:46,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 08:52:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 08:52:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 35 transitions. [2022-12-14 08:52:46,897 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 35 transitions. Word has length 9 [2022-12-14 08:52:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:46,897 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 35 transitions. [2022-12-14 08:52:46,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 35 transitions. [2022-12-14 08:52:46,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:52:46,898 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:46,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:46,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:52:46,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:46,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1439646429, now seen corresponding path program 1 times [2022-12-14 08:52:46,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:46,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189895757] [2022-12-14 08:52:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:46,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:46,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:46,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189895757] [2022-12-14 08:52:46,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189895757] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:52:46,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:52:46,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:52:46,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851920393] [2022-12-14 08:52:46,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:52:46,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:52:46,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:52:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:52:46,956 INFO L87 Difference]: Start difference. First operand 23 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:47,002 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2022-12-14 08:52:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:52:47,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 08:52:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:47,003 INFO L225 Difference]: With dead ends: 33 [2022-12-14 08:52:47,003 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 08:52:47,004 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 [2022-12-14 08:52:47,005 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:47,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:52:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 08:52:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 08:52:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 27 transitions. [2022-12-14 08:52:47,011 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 27 transitions. Word has length 9 [2022-12-14 08:52:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:47,012 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 27 transitions. [2022-12-14 08:52:47,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 27 transitions. [2022-12-14 08:52:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:52:47,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:47,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:47,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:52:47,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:47,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2105197122, now seen corresponding path program 1 times [2022-12-14 08:52:47,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:47,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910044155] [2022-12-14 08:52:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:47,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:47,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:47,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910044155] [2022-12-14 08:52:47,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910044155] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:47,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463336698] [2022-12-14 08:52:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:47,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:47,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:47,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:52:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:47,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:52:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:47,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:47,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463336698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:47,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628040887] [2022-12-14 08:52:47,231 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:47,231 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:47,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:47,240 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:47,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:47,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:47,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '405#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:47,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:47,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:47,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-14 08:52:47,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643685039] [2022-12-14 08:52:47,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:47,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:52:47,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:52:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:52:47,524 INFO L87 Difference]: Start difference. First operand 18 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:47,667 INFO L93 Difference]: Finished difference Result 72 states and 106 transitions. [2022-12-14 08:52:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:52:47,668 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 08:52:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:47,669 INFO L225 Difference]: With dead ends: 72 [2022-12-14 08:52:47,669 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 08:52:47,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:52:47,670 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:47,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 23 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:52:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 08:52:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 28. [2022-12-14 08:52:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2022-12-14 08:52:47,681 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 42 transitions. Word has length 9 [2022-12-14 08:52:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:47,681 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 42 transitions. [2022-12-14 08:52:47,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 42 transitions. [2022-12-14 08:52:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:52:47,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:47,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:47,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:52:47,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:47,884 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:47,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1393424963, now seen corresponding path program 1 times [2022-12-14 08:52:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:47,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973263359] [2022-12-14 08:52:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:47,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:48,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973263359] [2022-12-14 08:52:48,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973263359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272088629] [2022-12-14 08:52:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:48,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:48,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:48,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:48,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:52:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:48,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:52:48,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:52:48,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:52:48,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272088629] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:48,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368985048] [2022-12-14 08:52:48,160 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:48,160 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:48,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:48,161 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:48,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:48,275 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:48,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '661#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:48,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:48,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:48,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-12-14 08:52:48,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2691902] [2022-12-14 08:52:48,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:48,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:52:48,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:52:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 08:52:48,395 INFO L87 Difference]: Start difference. First operand 28 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-12-14 08:52:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:48,562 INFO L93 Difference]: Finished difference Result 67 states and 96 transitions. [2022-12-14 08:52:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:52:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 11 [2022-12-14 08:52:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:48,563 INFO L225 Difference]: With dead ends: 67 [2022-12-14 08:52:48,563 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 08:52:48,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:52:48,564 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:48,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 27 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:52:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 08:52:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2022-12-14 08:52:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 56 transitions. [2022-12-14 08:52:48,576 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 56 transitions. Word has length 11 [2022-12-14 08:52:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:48,576 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 56 transitions. [2022-12-14 08:52:48,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-12-14 08:52:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 56 transitions. [2022-12-14 08:52:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:52:48,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:48,577 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:48,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 08:52:48,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:48,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:48,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2021948689, now seen corresponding path program 2 times [2022-12-14 08:52:48,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:48,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820688913] [2022-12-14 08:52:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:48,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:48,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820688913] [2022-12-14 08:52:48,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820688913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218193812] [2022-12-14 08:52:48,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:52:48,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:48,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:48,872 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:48,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:52:48,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:52:48,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:52:48,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:52:48,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:48,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:49,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218193812] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:49,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393296959] [2022-12-14 08:52:49,005 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:49,005 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:49,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:49,006 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:49,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:49,046 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:49,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '947#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:49,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:49,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:49,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-14 08:52:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506973005] [2022-12-14 08:52:49,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:49,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 08:52:49,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:49,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 08:52:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:52:49,227 INFO L87 Difference]: Start difference. First operand 38 states and 56 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:49,996 INFO L93 Difference]: Finished difference Result 199 states and 302 transitions. [2022-12-14 08:52:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 08:52:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 08:52:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:49,998 INFO L225 Difference]: With dead ends: 199 [2022-12-14 08:52:49,999 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 08:52:49,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 08:52:50,000 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 312 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:50,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 92 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:52:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 08:52:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 62. [2022-12-14 08:52:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 91 transitions. [2022-12-14 08:52:50,023 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 91 transitions. Word has length 12 [2022-12-14 08:52:50,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:50,023 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 91 transitions. [2022-12-14 08:52:50,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 91 transitions. [2022-12-14 08:52:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 08:52:50,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:50,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:50,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:52:50,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 08:52:50,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:50,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1898898246, now seen corresponding path program 1 times [2022-12-14 08:52:50,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:50,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961380680] [2022-12-14 08:52:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:50,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:52:50,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:50,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961380680] [2022-12-14 08:52:50,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961380680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:50,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575588334] [2022-12-14 08:52:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:50,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:50,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:50,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:50,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:52:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:52:50,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:52:50,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:52:50,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575588334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886783055] [2022-12-14 08:52:50,533 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:50,533 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:50,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:50,533 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:50,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:50,619 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:50,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1545#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:50,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:50,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:50,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-12-14 08:52:50,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931145681] [2022-12-14 08:52:50,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:50,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:52:50,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:52:50,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:52:50,676 INFO L87 Difference]: Start difference. First operand 62 states and 91 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:50,741 INFO L93 Difference]: Finished difference Result 68 states and 97 transitions. [2022-12-14 08:52:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:52:50,741 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 08:52:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:50,742 INFO L225 Difference]: With dead ends: 68 [2022-12-14 08:52:50,742 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 08:52:50,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:52:50,743 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:50,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:52:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 08:52:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-14 08:52:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 62 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2022-12-14 08:52:50,754 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 13 [2022-12-14 08:52:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:50,754 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2022-12-14 08:52:50,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2022-12-14 08:52:50,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:52:50,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:50,755 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:50,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:52:50,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 08:52:50,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash 338438034, now seen corresponding path program 2 times [2022-12-14 08:52:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:50,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798102707] [2022-12-14 08:52:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:50,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:52:51,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:51,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798102707] [2022-12-14 08:52:51,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798102707] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:51,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175918948] [2022-12-14 08:52:51,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:52:51,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:51,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:51,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:51,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:52:51,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:52:51,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:52:51,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:52:51,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:52:51,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:52:51,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175918948] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:51,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95390636] [2022-12-14 08:52:51,214 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:51,215 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:51,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:51,215 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:51,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:51,302 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:51,347 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1884#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:51,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:51,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:51,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-14 08:52:51,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123038717] [2022-12-14 08:52:51,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:51,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:52:51,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:51,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:52:51,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:52:51,349 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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) [2022-12-14 08:52:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:51,390 INFO L93 Difference]: Finished difference Result 80 states and 113 transitions. [2022-12-14 08:52:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:52:51,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 14 [2022-12-14 08:52:51,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:51,391 INFO L225 Difference]: With dead ends: 80 [2022-12-14 08:52:51,391 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 08:52:51,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:52:51,392 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:51,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 14 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:52:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 08:52:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-12-14 08:52:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 54 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 82 transitions. [2022-12-14 08:52:51,407 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 82 transitions. Word has length 14 [2022-12-14 08:52:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:51,407 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 82 transitions. [2022-12-14 08:52:51,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) 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) [2022-12-14 08:52:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 82 transitions. [2022-12-14 08:52:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:52:51,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:51,408 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:51,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:52:51,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:51,609 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:51,609 INFO L85 PathProgramCache]: Analyzing trace with hash -890380223, now seen corresponding path program 1 times [2022-12-14 08:52:51,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:51,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256444773] [2022-12-14 08:52:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:51,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:52:51,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:51,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256444773] [2022-12-14 08:52:51,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256444773] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:51,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256389029] [2022-12-14 08:52:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:51,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:51,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:51,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:51,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:52:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:51,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:52:51,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:52:51,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:52:51,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256389029] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:51,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1543271295] [2022-12-14 08:52:51,813 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:51,813 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:51,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:51,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:51,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:51,886 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:51,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2232#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:51,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:51,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:51,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-14 08:52:51,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322844926] [2022-12-14 08:52:51,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:51,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 08:52:51,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 08:52:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:52:51,979 INFO L87 Difference]: Start difference. First operand 55 states and 82 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:52,170 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2022-12-14 08:52:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 08:52:52,170 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 08:52:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:52,171 INFO L225 Difference]: With dead ends: 105 [2022-12-14 08:52:52,171 INFO L226 Difference]: Without dead ends: 86 [2022-12-14 08:52:52,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-12-14 08:52:52,172 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:52,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 43 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:52:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-14 08:52:52,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2022-12-14 08:52:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 75 transitions. [2022-12-14 08:52:52,188 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 75 transitions. Word has length 14 [2022-12-14 08:52:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:52,188 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 75 transitions. [2022-12-14 08:52:52,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 75 transitions. [2022-12-14 08:52:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:52:52,189 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:52,189 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:52,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:52:52,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:52,391 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:52,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1319846673, now seen corresponding path program 2 times [2022-12-14 08:52:52,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:52,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551513113] [2022-12-14 08:52:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:52,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:52,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:52,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551513113] [2022-12-14 08:52:52,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551513113] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:52,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254568400] [2022-12-14 08:52:52,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:52:52,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:52,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:52,586 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:52,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:52:52,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:52:52,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:52:52,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:52:52,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:52:52,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:52:52,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254568400] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:52,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732195818] [2022-12-14 08:52:52,674 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:52,674 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:52,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:52,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:52,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:52,728 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:52,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2621#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:52,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:52,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:52,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2022-12-14 08:52:52,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413638424] [2022-12-14 08:52:52,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:52,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:52:52,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:52:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:52:52,869 INFO L87 Difference]: Start difference. First operand 51 states and 75 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:53,231 INFO L93 Difference]: Finished difference Result 115 states and 162 transitions. [2022-12-14 08:52:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 08:52:53,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 08:52:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:53,232 INFO L225 Difference]: With dead ends: 115 [2022-12-14 08:52:53,232 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 08:52:53,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 08:52:53,232 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:53,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 73 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:52:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 08:52:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2022-12-14 08:52:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 99 transitions. [2022-12-14 08:52:53,244 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 99 transitions. Word has length 14 [2022-12-14 08:52:53,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:53,244 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 99 transitions. [2022-12-14 08:52:53,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:53,245 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 99 transitions. [2022-12-14 08:52:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:52:53,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:53,245 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:53,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:52:53,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 08:52:53,447 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:53,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:53,448 INFO L85 PathProgramCache]: Analyzing trace with hash 481185371, now seen corresponding path program 2 times [2022-12-14 08:52:53,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:53,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015522898] [2022-12-14 08:52:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:53,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:52:53,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:53,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015522898] [2022-12-14 08:52:53,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015522898] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:53,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522894827] [2022-12-14 08:52:53,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:52:53,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:53,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:53,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:53,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:52:53,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:52:53,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:52:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:52:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:52:53,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:52:53,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522894827] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:53,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [135415918] [2022-12-14 08:52:53,699 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:53,699 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:53,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:53,700 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:53,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:53,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:53,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3105#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:53,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:53,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:53,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2022-12-14 08:52:53,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615442374] [2022-12-14 08:52:53,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:53,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 08:52:53,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:53,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 08:52:53,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:52:53,879 INFO L87 Difference]: Start difference. First operand 70 states and 99 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-12-14 08:52:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:54,597 INFO L93 Difference]: Finished difference Result 173 states and 238 transitions. [2022-12-14 08:52:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 08:52:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) Word has length 16 [2022-12-14 08:52:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:54,598 INFO L225 Difference]: With dead ends: 173 [2022-12-14 08:52:54,598 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 08:52:54,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 08:52:54,599 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:54,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 161 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:52:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 08:52:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 77. [2022-12-14 08:52:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 76 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2022-12-14 08:52:54,618 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 16 [2022-12-14 08:52:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:54,618 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2022-12-14 08:52:54,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-12-14 08:52:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2022-12-14 08:52:54,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:52:54,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:54,619 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:54,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:52:54,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:54,820 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash -274633875, now seen corresponding path program 3 times [2022-12-14 08:52:54,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:54,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364516842] [2022-12-14 08:52:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:54,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:52:54,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:54,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364516842] [2022-12-14 08:52:54,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364516842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:54,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769430734] [2022-12-14 08:52:54,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:52:54,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:54,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:54,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:54,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:52:54,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:52:54,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:52:54,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:52:54,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:52:54,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:52:54,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769430734] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:54,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898370416] [2022-12-14 08:52:54,985 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:54,986 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:54,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:54,986 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:54,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:55,066 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:55,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3722#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:55,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:55,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:55,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-12-14 08:52:55,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220803565] [2022-12-14 08:52:55,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:55,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:52:55,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:55,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:52:55,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:52:55,125 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:55,247 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2022-12-14 08:52:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:52:55,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 08:52:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:55,248 INFO L225 Difference]: With dead ends: 106 [2022-12-14 08:52:55,248 INFO L226 Difference]: Without dead ends: 98 [2022-12-14 08:52:55,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:52:55,249 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:55,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 22 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:52:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-14 08:52:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-12-14 08:52:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.4125) internal successors, (113), 80 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 113 transitions. [2022-12-14 08:52:55,274 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 113 transitions. Word has length 17 [2022-12-14 08:52:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:55,274 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 113 transitions. [2022-12-14 08:52:55,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 113 transitions. [2022-12-14 08:52:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:52:55,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:55,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:55,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 08:52:55,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:55,476 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1240250499, now seen corresponding path program 3 times [2022-12-14 08:52:55,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:55,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921142847] [2022-12-14 08:52:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:55,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:52:55,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:55,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921142847] [2022-12-14 08:52:55,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921142847] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:55,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493294176] [2022-12-14 08:52:55,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:52:55,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:55,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:55,720 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:55,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:52:55,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:52:55,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:52:55,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:52:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:52:55,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:52:55,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493294176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:55,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414999791] [2022-12-14 08:52:55,829 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:55,829 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:55,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:55,829 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:55,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:55,885 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:56,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4195#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:56,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:56,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:56,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-12-14 08:52:56,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643545463] [2022-12-14 08:52:56,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:56,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 08:52:56,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:56,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 08:52:56,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:52:56,029 INFO L87 Difference]: Start difference. First operand 81 states and 113 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-12-14 08:52:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:57,218 INFO L93 Difference]: Finished difference Result 190 states and 259 transitions. [2022-12-14 08:52:57,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 08:52:57,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) Word has length 17 [2022-12-14 08:52:57,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:57,219 INFO L225 Difference]: With dead ends: 190 [2022-12-14 08:52:57,219 INFO L226 Difference]: Without dead ends: 178 [2022-12-14 08:52:57,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=394, Invalid=3146, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 08:52:57,222 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 169 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:57,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 107 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:52:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-14 08:52:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 102. [2022-12-14 08:52:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.396039603960396) internal successors, (141), 101 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 141 transitions. [2022-12-14 08:52:57,250 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 141 transitions. Word has length 17 [2022-12-14 08:52:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:57,250 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 141 transitions. [2022-12-14 08:52:57,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-12-14 08:52:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 141 transitions. [2022-12-14 08:52:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 08:52:57,250 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:57,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:57,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 08:52:57,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 08:52:57,453 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:57,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1482461425, now seen corresponding path program 4 times [2022-12-14 08:52:57,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:57,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087355303] [2022-12-14 08:52:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:57,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:52:57,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:57,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087355303] [2022-12-14 08:52:57,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087355303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935895877] [2022-12-14 08:52:57,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:52:57,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:57,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:57,615 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:57,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 08:52:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:57,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:52:57,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:52:57,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:52:57,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935895877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1133445040] [2022-12-14 08:52:57,746 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:57,746 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:57,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:57,746 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:57,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:57,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:57,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4932#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:57,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:57,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:57,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-12-14 08:52:57,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349908158] [2022-12-14 08:52:57,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:57,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 08:52:57,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:57,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 08:52:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-14 08:52:57,888 INFO L87 Difference]: Start difference. First operand 102 states and 141 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:52:57,977 INFO L93 Difference]: Finished difference Result 109 states and 148 transitions. [2022-12-14 08:52:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:52:57,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 08:52:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:52:57,978 INFO L225 Difference]: With dead ends: 109 [2022-12-14 08:52:57,978 INFO L226 Difference]: Without dead ends: 103 [2022-12-14 08:52:57,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-12-14 08:52:57,979 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:52:57,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:52:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-14 08:52:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-12-14 08:52:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.392156862745098) internal successors, (142), 102 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 142 transitions. [2022-12-14 08:52:58,004 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 142 transitions. Word has length 18 [2022-12-14 08:52:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:52:58,004 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 142 transitions. [2022-12-14 08:52:58,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:52:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 142 transitions. [2022-12-14 08:52:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 08:52:58,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:52:58,005 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:52:58,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 08:52:58,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 08:52:58,206 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:52:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:52:58,208 INFO L85 PathProgramCache]: Analyzing trace with hash -700622803, now seen corresponding path program 5 times [2022-12-14 08:52:58,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:52:58,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508903327] [2022-12-14 08:52:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:52:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:52:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:52:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:52:58,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:52:58,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508903327] [2022-12-14 08:52:58,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508903327] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:52:58,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475299446] [2022-12-14 08:52:58,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:52:58,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:52:58,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:52:58,353 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:52:58,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 08:52:58,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 08:52:58,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:52:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 08:52:58,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:52:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:52:58,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:52:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:52:58,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475299446] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:52:58,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499790664] [2022-12-14 08:52:58,602 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:52:58,602 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:52:58,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:52:58,602 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:52:58,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:52:58,680 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:52:58,772 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5474#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:52:58,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:52:58,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:52:58,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-12-14 08:52:58,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523125224] [2022-12-14 08:52:58,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:52:58,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 08:52:58,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:52:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 08:52:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:52:58,774 INFO L87 Difference]: Start difference. First operand 103 states and 142 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:53:04,735 INFO L93 Difference]: Finished difference Result 419 states and 606 transitions. [2022-12-14 08:53:04,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-14 08:53:04,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 08:53:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:53:04,738 INFO L225 Difference]: With dead ends: 419 [2022-12-14 08:53:04,738 INFO L226 Difference]: Without dead ends: 388 [2022-12-14 08:53:04,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 08:53:04,740 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 599 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:53:04,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 182 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 08:53:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-12-14 08:53:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 126. [2022-12-14 08:53:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.416) internal successors, (177), 125 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 177 transitions. [2022-12-14 08:53:04,777 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 177 transitions. Word has length 18 [2022-12-14 08:53:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:53:04,777 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 177 transitions. [2022-12-14 08:53:04,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 177 transitions. [2022-12-14 08:53:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 08:53:04,777 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:53:04,777 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:53:04,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 08:53:04,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 08:53:04,979 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:53:04,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:53:04,980 INFO L85 PathProgramCache]: Analyzing trace with hash 117840877, now seen corresponding path program 6 times [2022-12-14 08:53:04,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:53:04,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125675766] [2022-12-14 08:53:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:53:04,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:53:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:53:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:53:05,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:53:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125675766] [2022-12-14 08:53:05,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125675766] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:53:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386994735] [2022-12-14 08:53:05,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:53:05,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:53:05,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:53:05,068 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:53:05,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 08:53:05,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:53:05,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:53:05,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:53:05,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:53:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:53:05,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:53:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:53:05,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386994735] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:53:05,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033865454] [2022-12-14 08:53:05,148 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:53:05,148 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:53:05,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:53:05,148 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:53:05,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:53:05,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:53:05,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6739#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:53:05,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:53:05,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:53:05,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-12-14 08:53:05,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227697238] [2022-12-14 08:53:05,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:53:05,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:53:05,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:53:05,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:53:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:53:05,281 INFO L87 Difference]: Start difference. First operand 126 states and 177 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:53:05,419 INFO L93 Difference]: Finished difference Result 163 states and 223 transitions. [2022-12-14 08:53:05,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:53:05,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 08:53:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:53:05,421 INFO L225 Difference]: With dead ends: 163 [2022-12-14 08:53:05,421 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 08:53:05,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:53:05,422 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:53:05,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:53:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 08:53:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 118. [2022-12-14 08:53:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.4273504273504274) internal successors, (167), 117 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 167 transitions. [2022-12-14 08:53:05,457 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 167 transitions. Word has length 19 [2022-12-14 08:53:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:53:05,457 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 167 transitions. [2022-12-14 08:53:05,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:05,458 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 167 transitions. [2022-12-14 08:53:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 08:53:05,458 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:53:05,458 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:53:05,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 08:53:05,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 08:53:05,660 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:53:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:53:05,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1709300801, now seen corresponding path program 3 times [2022-12-14 08:53:05,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:53:05,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324786905] [2022-12-14 08:53:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:53:05,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:53:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:53:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:53:05,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:53:05,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324786905] [2022-12-14 08:53:05,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324786905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:53:05,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125459034] [2022-12-14 08:53:05,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:53:05,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:53:05,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:53:05,850 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:53:05,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 08:53:05,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:53:05,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:53:05,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:53:05,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:53:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:53:05,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:53:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:53:05,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125459034] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:53:05,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1111901035] [2022-12-14 08:53:05,975 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:53:05,975 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:53:05,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:53:05,975 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:53:05,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:53:06,043 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:53:06,149 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7411#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:53:06,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:53:06,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:53:06,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-12-14 08:53:06,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733222257] [2022-12-14 08:53:06,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:53:06,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 08:53:06,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:53:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 08:53:06,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:53:06,151 INFO L87 Difference]: Start difference. First operand 118 states and 167 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-12-14 08:53:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:53:07,404 INFO L93 Difference]: Finished difference Result 289 states and 357 transitions. [2022-12-14 08:53:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 08:53:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) Word has length 20 [2022-12-14 08:53:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:53:07,406 INFO L225 Difference]: With dead ends: 289 [2022-12-14 08:53:07,406 INFO L226 Difference]: Without dead ends: 273 [2022-12-14 08:53:07,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=2662, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 08:53:07,408 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 209 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:53:07,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 400 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 08:53:07,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-12-14 08:53:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 122. [2022-12-14 08:53:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.4049586776859504) internal successors, (170), 121 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 170 transitions. [2022-12-14 08:53:07,445 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 170 transitions. Word has length 20 [2022-12-14 08:53:07,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:53:07,445 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 170 transitions. [2022-12-14 08:53:07,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-12-14 08:53:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 170 transitions. [2022-12-14 08:53:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 08:53:07,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:53:07,446 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:53:07,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 08:53:07,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 08:53:07,647 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:53:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:53:07,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1961126993, now seen corresponding path program 4 times [2022-12-14 08:53:07,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:53:07,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983077279] [2022-12-14 08:53:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:53:07,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:53:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:53:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:53:07,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:53:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983077279] [2022-12-14 08:53:07,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983077279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:53:07,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066458862] [2022-12-14 08:53:07,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:53:07,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:53:07,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:53:07,804 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:53:07,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 08:53:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:53:07,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 08:53:07,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:53:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:53:07,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:53:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:53:07,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066458862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:53:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405225603] [2022-12-14 08:53:07,944 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:53:07,945 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:53:07,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:53:07,945 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:53:07,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:53:08,002 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:53:08,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8347#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:53:08,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:53:08,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:53:08,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-12-14 08:53:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755618033] [2022-12-14 08:53:08,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:53:08,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 08:53:08,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:53:08,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 08:53:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:53:08,148 INFO L87 Difference]: Start difference. First operand 122 states and 170 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:53:11,444 INFO L93 Difference]: Finished difference Result 268 states and 367 transitions. [2022-12-14 08:53:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 08:53:11,444 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 08:53:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:53:11,445 INFO L225 Difference]: With dead ends: 268 [2022-12-14 08:53:11,445 INFO L226 Difference]: Without dead ends: 255 [2022-12-14 08:53:11,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=697, Invalid=6613, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 08:53:11,446 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 243 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:53:11,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 162 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 08:53:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-14 08:53:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 148. [2022-12-14 08:53:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.3945578231292517) internal successors, (205), 147 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-12-14 08:53:11,489 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 20 [2022-12-14 08:53:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:53:11,490 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-12-14 08:53:11,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:11,490 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-12-14 08:53:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:53:11,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:53:11,490 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:53:11,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 08:53:11,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:53:11,691 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:53:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:53:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1567453634, now seen corresponding path program 4 times [2022-12-14 08:53:11,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:53:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472068924] [2022-12-14 08:53:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:53:11,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:53:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:53:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:53:11,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:53:11,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472068924] [2022-12-14 08:53:11,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472068924] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:53:11,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669157202] [2022-12-14 08:53:11,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:53:11,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:53:11,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:53:11,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:53:11,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 08:53:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:53:11,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 08:53:11,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:53:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:53:11,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:53:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 08:53:12,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669157202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:53:12,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019708062] [2022-12-14 08:53:12,013 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:53:12,013 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:53:12,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:53:12,014 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:53:12,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:53:12,079 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:53:12,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9393#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:53:12,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:53:12,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:53:12,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 5] total 17 [2022-12-14 08:53:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301983827] [2022-12-14 08:53:12,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:53:12,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:53:12,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:53:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:53:12,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-12-14 08:53:12,180 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:13,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:53:13,282 INFO L93 Difference]: Finished difference Result 329 states and 453 transitions. [2022-12-14 08:53:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 08:53:13,283 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 08:53:13,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:53:13,283 INFO L225 Difference]: With dead ends: 329 [2022-12-14 08:53:13,283 INFO L226 Difference]: Without dead ends: 311 [2022-12-14 08:53:13,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=3293, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 08:53:13,284 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 93 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:53:13,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 277 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:53:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-12-14 08:53:13,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 161. [2022-12-14 08:53:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.40625) internal successors, (225), 160 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 225 transitions. [2022-12-14 08:53:13,335 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 225 transitions. Word has length 21 [2022-12-14 08:53:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:53:13,335 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 225 transitions. [2022-12-14 08:53:13,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 225 transitions. [2022-12-14 08:53:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:53:13,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:53:13,336 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:53:13,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 08:53:13,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:53:13,537 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:53:13,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:53:13,538 INFO L85 PathProgramCache]: Analyzing trace with hash 342825982, now seen corresponding path program 3 times [2022-12-14 08:53:13,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:53:13,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239197411] [2022-12-14 08:53:13,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:53:13,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:53:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:53:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:53:13,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:53:13,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239197411] [2022-12-14 08:53:13,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239197411] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:53:13,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835335798] [2022-12-14 08:53:13,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:53:13,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:53:13,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:53:13,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:53:13,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 08:53:13,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:53:13,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:53:13,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 08:53:13,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:53:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:53:13,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:53:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:53:14,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835335798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:53:14,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [434220215] [2022-12-14 08:53:14,142 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:53:14,142 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:53:14,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:53:14,142 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:53:14,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:53:14,171 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:53:14,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10574#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:53:14,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:53:14,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:53:14,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-12-14 08:53:14,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578787344] [2022-12-14 08:53:14,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:53:14,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 08:53:14,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:53:14,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 08:53:14,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 08:53:14,489 INFO L87 Difference]: Start difference. First operand 161 states and 225 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:53:40,838 WARN L233 SmtUtils]: Spent 6.37s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:54:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:28,399 INFO L93 Difference]: Finished difference Result 1033 states and 1598 transitions. [2022-12-14 08:54:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 08:54:28,400 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 08:54:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:28,401 INFO L225 Difference]: With dead ends: 1033 [2022-12-14 08:54:28,402 INFO L226 Difference]: Without dead ends: 999 [2022-12-14 08:54:28,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 71.5s TimeCoverageRelationStatistics Valid=2253, Invalid=5577, Unknown=2, NotChecked=0, Total=7832 [2022-12-14 08:54:28,403 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1628 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:28,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 638 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 1668 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 08:54:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-12-14 08:54:28,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 229. [2022-12-14 08:54:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.412280701754386) internal successors, (322), 228 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 322 transitions. [2022-12-14 08:54:28,506 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 322 transitions. Word has length 21 [2022-12-14 08:54:28,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:28,506 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 322 transitions. [2022-12-14 08:54:28,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 322 transitions. [2022-12-14 08:54:28,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 08:54:28,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:28,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:28,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 08:54:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:28,708 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 34685810, now seen corresponding path program 7 times [2022-12-14 08:54:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193562105] [2022-12-14 08:54:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:54:28,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:28,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193562105] [2022-12-14 08:54:28,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193562105] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:54:28,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227085885] [2022-12-14 08:54:28,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:54:28,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:28,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:54:28,794 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:54:28,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 08:54:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:28,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:54:28,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:54:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:54:28,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:54:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:54:28,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227085885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:54:28,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002094062] [2022-12-14 08:54:28,891 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:54:28,891 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:54:28,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:54:28,891 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:54:28,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:54:28,965 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:54:29,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13239#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:54:29,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:54:29,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:54:29,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-12-14 08:54:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161221155] [2022-12-14 08:54:29,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:54:29,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:54:29,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:54:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:54:29,028 INFO L87 Difference]: Start difference. First operand 229 states and 322 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:29,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:29,327 INFO L93 Difference]: Finished difference Result 274 states and 374 transitions. [2022-12-14 08:54:29,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:54:29,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 08:54:29,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:29,329 INFO L225 Difference]: With dead ends: 274 [2022-12-14 08:54:29,329 INFO L226 Difference]: Without dead ends: 265 [2022-12-14 08:54:29,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:54:29,330 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:29,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:54:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-12-14 08:54:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 233. [2022-12-14 08:54:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.4051724137931034) internal successors, (326), 232 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 326 transitions. [2022-12-14 08:54:29,435 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 326 transitions. Word has length 22 [2022-12-14 08:54:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:29,435 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 326 transitions. [2022-12-14 08:54:29,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 326 transitions. [2022-12-14 08:54:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 08:54:29,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:29,436 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:29,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 08:54:29,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 08:54:29,638 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:29,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1741491738, now seen corresponding path program 8 times [2022-12-14 08:54:29,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:29,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096598873] [2022-12-14 08:54:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:29,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:54:30,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:30,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096598873] [2022-12-14 08:54:30,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096598873] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:54:30,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406670573] [2022-12-14 08:54:30,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:54:30,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:30,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:54:30,051 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:54:30,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 08:54:30,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:54:30,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:54:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 08:54:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:54:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:54:30,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:54:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:54:30,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406670573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:54:30,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038710818] [2022-12-14 08:54:30,259 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:54:30,259 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:54:30,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:54:30,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:54:30,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:54:30,348 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:54:30,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14393#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:54:30,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:54:30,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:54:30,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 18 [2022-12-14 08:54:30,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641939142] [2022-12-14 08:54:30,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:54:30,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 08:54:30,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:30,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 08:54:30,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-12-14 08:54:30,451 INFO L87 Difference]: Start difference. First operand 233 states and 326 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:30,774 INFO L93 Difference]: Finished difference Result 246 states and 339 transitions. [2022-12-14 08:54:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:54:30,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 08:54:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:30,776 INFO L225 Difference]: With dead ends: 246 [2022-12-14 08:54:30,776 INFO L226 Difference]: Without dead ends: 221 [2022-12-14 08:54:30,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:54:30,776 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:30,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:54:30,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-12-14 08:54:30,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-12-14 08:54:30,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.4181818181818182) internal successors, (312), 220 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 312 transitions. [2022-12-14 08:54:30,876 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 312 transitions. Word has length 23 [2022-12-14 08:54:30,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:30,876 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 312 transitions. [2022-12-14 08:54:30,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:30,876 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 312 transitions. [2022-12-14 08:54:30,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 08:54:30,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:30,877 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:30,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 08:54:31,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 08:54:31,078 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:31,079 INFO L85 PathProgramCache]: Analyzing trace with hash 994402249, now seen corresponding path program 5 times [2022-12-14 08:54:31,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:31,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100246875] [2022-12-14 08:54:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:54:31,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:31,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100246875] [2022-12-14 08:54:31,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100246875] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:54:31,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049304245] [2022-12-14 08:54:31,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:54:31,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:31,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:54:31,243 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:54:31,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 08:54:31,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:54:31,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:54:31,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:54:31,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:54:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:54:31,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:54:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:54:31,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049304245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:54:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15076026] [2022-12-14 08:54:31,486 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:54:31,487 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:54:31,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:54:31,487 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:54:31,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:54:31,559 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:54:31,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15476#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:54:31,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:54:31,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:54:31,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 23 [2022-12-14 08:54:31,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778940490] [2022-12-14 08:54:31,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:54:31,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 08:54:31,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:31,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 08:54:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-12-14 08:54:31,704 INFO L87 Difference]: Start difference. First operand 221 states and 312 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:36,190 INFO L93 Difference]: Finished difference Result 807 states and 1040 transitions. [2022-12-14 08:54:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-12-14 08:54:36,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 08:54:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:36,194 INFO L225 Difference]: With dead ends: 807 [2022-12-14 08:54:36,194 INFO L226 Difference]: Without dead ends: 778 [2022-12-14 08:54:36,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4019 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1452, Invalid=11658, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 08:54:36,197 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 717 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:36,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 824 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 08:54:36,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-12-14 08:54:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 323. [2022-12-14 08:54:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.4813664596273293) internal successors, (477), 322 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 477 transitions. [2022-12-14 08:54:36,348 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 477 transitions. Word has length 23 [2022-12-14 08:54:36,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:36,348 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 477 transitions. [2022-12-14 08:54:36,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 477 transitions. [2022-12-14 08:54:36,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 08:54:36,349 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:36,349 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:36,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 08:54:36,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:36,550 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:36,551 INFO L85 PathProgramCache]: Analyzing trace with hash -191864381, now seen corresponding path program 6 times [2022-12-14 08:54:36,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:36,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134073886] [2022-12-14 08:54:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:36,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:54:36,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:36,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134073886] [2022-12-14 08:54:36,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134073886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:54:36,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107471051] [2022-12-14 08:54:36,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:54:36,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:36,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:54:36,741 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:54:36,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 08:54:36,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:54:36,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:54:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 08:54:36,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:54:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 08:54:36,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:54:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 08:54:36,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107471051] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:54:36,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642595825] [2022-12-14 08:54:36,937 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:54:36,937 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:54:36,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:54:36,937 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:54:36,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:54:37,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:54:37,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17847#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:54:37,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:54:37,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:54:37,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2022-12-14 08:54:37,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448699449] [2022-12-14 08:54:37,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:54:37,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 08:54:37,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:37,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 08:54:37,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-12-14 08:54:37,171 INFO L87 Difference]: Start difference. First operand 323 states and 477 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:54:40,832 INFO L93 Difference]: Finished difference Result 479 states and 675 transitions. [2022-12-14 08:54:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 08:54:40,833 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 08:54:40,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:54:40,833 INFO L225 Difference]: With dead ends: 479 [2022-12-14 08:54:40,833 INFO L226 Difference]: Without dead ends: 446 [2022-12-14 08:54:40,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=651, Invalid=7005, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 08:54:40,835 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 205 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:54:40,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 245 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 08:54:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-12-14 08:54:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 351. [2022-12-14 08:54:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.44) internal successors, (504), 350 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 504 transitions. [2022-12-14 08:54:41,005 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 504 transitions. Word has length 25 [2022-12-14 08:54:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:54:41,005 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 504 transitions. [2022-12-14 08:54:41,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 504 transitions. [2022-12-14 08:54:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 08:54:41,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:54:41,006 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:54:41,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 08:54:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 08:54:41,207 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:54:41,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:54:41,208 INFO L85 PathProgramCache]: Analyzing trace with hash -243024211, now seen corresponding path program 9 times [2022-12-14 08:54:41,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:54:41,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729466807] [2022-12-14 08:54:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:54:41,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:54:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:54:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:54:41,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:54:41,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729466807] [2022-12-14 08:54:41,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729466807] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:54:41,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396721381] [2022-12-14 08:54:41,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:54:41,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:54:41,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:54:41,460 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:54:41,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 08:54:41,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:54:41,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:54:41,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 08:54:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:54:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:54:41,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:54:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:54:42,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396721381] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:54:42,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [882873018] [2022-12-14 08:54:42,030 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:54:42,030 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:54:42,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:54:42,030 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:54:42,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:54:42,103 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:54:42,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19780#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:54:42,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:54:42,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:54:42,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2022-12-14 08:54:42,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536125950] [2022-12-14 08:54:42,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:54:42,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 08:54:42,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:54:42,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 08:54:42,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 08:54:42,265 INFO L87 Difference]: Start difference. First operand 351 states and 504 transitions. Second operand has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:54:55,737 WARN L233 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:55:15,290 WARN L233 SmtUtils]: Spent 13.11s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:55:39,880 WARN L233 SmtUtils]: Spent 6.73s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:55:53,679 WARN L233 SmtUtils]: Spent 9.19s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:56:06,494 WARN L233 SmtUtils]: Spent 7.42s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:56:42,924 WARN L233 SmtUtils]: Spent 8.93s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:57:10,332 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:57:20,859 WARN L233 SmtUtils]: Spent 6.88s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:59:31,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 08:59:37,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 08:59:43,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 08:59:45,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 08:59:47,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 08:59:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:51,094 INFO L93 Difference]: Finished difference Result 1513 states and 2265 transitions. [2022-12-14 08:59:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-12-14 08:59:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 08:59:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:51,097 INFO L225 Difference]: With dead ends: 1513 [2022-12-14 08:59:51,097 INFO L226 Difference]: Without dead ends: 1444 [2022-12-14 08:59:51,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10553 ImplicationChecksByTransitivity, 281.4s TimeCoverageRelationStatistics Valid=7121, Invalid=20599, Unknown=2, NotChecked=0, Total=27722 [2022-12-14 08:59:51,100 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2024 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 834 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2024 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 3360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:51,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2024 Valid, 814 Invalid, 3360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 2524 Invalid, 2 Unknown, 0 Unchecked, 27.0s Time] [2022-12-14 08:59:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-12-14 08:59:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 395. [2022-12-14 08:59:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.4543147208121827) internal successors, (573), 394 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 573 transitions. [2022-12-14 08:59:51,338 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 573 transitions. Word has length 26 [2022-12-14 08:59:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:51,338 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 573 transitions. [2022-12-14 08:59:51,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 573 transitions. [2022-12-14 08:59:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 08:59:51,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:51,338 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:51,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 08:59:51,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 08:59:51,540 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:51,541 INFO L85 PathProgramCache]: Analyzing trace with hash -463335407, now seen corresponding path program 10 times [2022-12-14 08:59:51,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:51,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517989513] [2022-12-14 08:59:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:51,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:59:52,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517989513] [2022-12-14 08:59:52,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517989513] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:59:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110870953] [2022-12-14 08:59:52,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:59:52,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:52,010 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:52,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 08:59:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:52,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 08:59:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:59:52,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:59:52,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110870953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547199147] [2022-12-14 08:59:52,352 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:59:52,352 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:52,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:52,352 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:52,352 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:52,422 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:59:52,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23930#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:59:52,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:59:52,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:59:52,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 22 [2022-12-14 08:59:52,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102137217] [2022-12-14 08:59:52,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:59:52,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 08:59:52,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:52,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 08:59:52,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-12-14 08:59:52,515 INFO L87 Difference]: Start difference. First operand 395 states and 573 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:53,159 INFO L93 Difference]: Finished difference Result 403 states and 580 transitions. [2022-12-14 08:59:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 08:59:53,160 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 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 28 [2022-12-14 08:59:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:53,160 INFO L225 Difference]: With dead ends: 403 [2022-12-14 08:59:53,160 INFO L226 Difference]: Without dead ends: 380 [2022-12-14 08:59:53,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-12-14 08:59:53,161 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:53,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:59:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-12-14 08:59:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-12-14 08:59:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.4696569920844327) internal successors, (557), 379 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 557 transitions. [2022-12-14 08:59:53,383 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 557 transitions. Word has length 28 [2022-12-14 08:59:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:53,383 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 557 transitions. [2022-12-14 08:59:53,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 557 transitions. [2022-12-14 08:59:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 08:59:53,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:53,385 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:53,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 08:59:53,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 08:59:53,586 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:53,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1147091729, now seen corresponding path program 7 times [2022-12-14 08:59:53,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:53,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333833034] [2022-12-14 08:59:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:53,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 08:59:53,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:53,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333833034] [2022-12-14 08:59:53,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333833034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:59:53,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195686011] [2022-12-14 08:59:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:59:53,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:53,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:53,735 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:53,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 08:59:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:53,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 08:59:53,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 08:59:53,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 08:59:54,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195686011] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:54,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688077255] [2022-12-14 08:59:54,052 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:59:54,052 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:54,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:54,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:54,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:54,126 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:59:54,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25682#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:59:54,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:59:54,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:59:54,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 29 [2022-12-14 08:59:54,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889531806] [2022-12-14 08:59:54,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:59:54,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 08:59:54,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:54,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 08:59:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 08:59:54,266 INFO L87 Difference]: Start difference. First operand 380 states and 557 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:57,221 INFO L93 Difference]: Finished difference Result 647 states and 854 transitions. [2022-12-14 08:59:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 08:59:57,221 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 08:59:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:57,224 INFO L225 Difference]: With dead ends: 647 [2022-12-14 08:59:57,224 INFO L226 Difference]: Without dead ends: 549 [2022-12-14 08:59:57,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=375, Invalid=2817, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 08:59:57,225 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:57,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 256 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 08:59:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-12-14 08:59:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 361. [2022-12-14 08:59:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.4444444444444444) internal successors, (520), 360 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 520 transitions. [2022-12-14 08:59:57,444 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 520 transitions. Word has length 28 [2022-12-14 08:59:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:57,444 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 520 transitions. [2022-12-14 08:59:57,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:59:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 520 transitions. [2022-12-14 08:59:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 08:59:57,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:57,445 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:57,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 08:59:57,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 08:59:57,646 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:59:57,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash 634021137, now seen corresponding path program 8 times [2022-12-14 08:59:57,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:57,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108888062] [2022-12-14 08:59:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:59:57,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:57,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108888062] [2022-12-14 08:59:57,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108888062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:59:57,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209961857] [2022-12-14 08:59:57,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:59:57,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:57,896 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:57,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 08:59:57,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 08:59:57,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:59:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 08:59:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:59:58,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 08:59:58,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209961857] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:58,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582389091] [2022-12-14 08:59:58,165 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:59:58,165 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:58,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:58,165 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:58,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:58,230 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:59:58,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27888#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:59:58,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:59:58,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:59:58,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2022-12-14 08:59:58,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397337263] [2022-12-14 08:59:58,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:59:58,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 08:59:58,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:58,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 08:59:58,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-12-14 08:59:58,374 INFO L87 Difference]: Start difference. First operand 361 states and 520 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:08,244 INFO L93 Difference]: Finished difference Result 569 states and 784 transitions. [2022-12-14 09:00:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-12-14 09:00:08,244 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 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 28 [2022-12-14 09:00:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:08,245 INFO L225 Difference]: With dead ends: 569 [2022-12-14 09:00:08,245 INFO L226 Difference]: Without dead ends: 551 [2022-12-14 09:00:08,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6188 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1343, Invalid=17563, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 09:00:08,247 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 331 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:08,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 322 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 09:00:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-12-14 09:00:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 369. [2022-12-14 09:00:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.4320652173913044) internal successors, (527), 368 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 527 transitions. [2022-12-14 09:00:08,488 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 527 transitions. Word has length 28 [2022-12-14 09:00:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:08,488 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 527 transitions. [2022-12-14 09:00:08,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 527 transitions. [2022-12-14 09:00:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 09:00:08,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:08,489 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:00:08,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 09:00:08,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 09:00:08,690 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash -48612911, now seen corresponding path program 9 times [2022-12-14 09:00:08,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:08,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974051794] [2022-12-14 09:00:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 09:00:08,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:08,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974051794] [2022-12-14 09:00:08,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974051794] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:00:08,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247788510] [2022-12-14 09:00:08,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:00:08,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:08,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:00:08,863 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:00:08,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 09:00:08,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:00:08,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:00:08,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 09:00:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:00:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 09:00:08,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:00:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 09:00:09,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247788510] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:00:09,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968831910] [2022-12-14 09:00:09,103 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:00:09,103 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:00:09,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:00:09,103 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:00:09,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:00:09,166 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:00:09,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30111#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:00:09,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:00:09,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:00:09,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 23 [2022-12-14 09:00:09,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939053170] [2022-12-14 09:00:09,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:00:09,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:00:09,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:00:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-12-14 09:00:09,311 INFO L87 Difference]: Start difference. First operand 369 states and 527 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:11,414 INFO L93 Difference]: Finished difference Result 633 states and 823 transitions. [2022-12-14 09:00:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 09:00:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 09:00:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:11,417 INFO L225 Difference]: With dead ends: 633 [2022-12-14 09:00:11,417 INFO L226 Difference]: Without dead ends: 572 [2022-12-14 09:00:11,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=335, Invalid=2971, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 09:00:11,418 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 125 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:11,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 345 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:00:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-12-14 09:00:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 352. [2022-12-14 09:00:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.4188034188034189) internal successors, (498), 351 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 498 transitions. [2022-12-14 09:00:11,642 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 498 transitions. Word has length 28 [2022-12-14 09:00:11,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:11,642 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 498 transitions. [2022-12-14 09:00:11,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 498 transitions. [2022-12-14 09:00:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 09:00:11,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:11,643 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:00:11,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 09:00:11,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:11,844 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1080526949, now seen corresponding path program 10 times [2022-12-14 09:00:11,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:11,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782926905] [2022-12-14 09:00:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:11,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 09:00:12,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:12,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782926905] [2022-12-14 09:00:12,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782926905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:00:12,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156408684] [2022-12-14 09:00:12,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:00:12,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:12,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:00:12,065 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:00:12,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 09:00:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:12,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 09:00:12,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:00:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 09:00:12,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:00:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 09:00:12,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156408684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:00:12,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1675745972] [2022-12-14 09:00:12,246 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:00:12,246 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:00:12,246 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:00:12,247 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:00:12,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:00:12,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:00:12,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32295#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:00:12,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:00:12,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:00:12,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 22 [2022-12-14 09:00:12,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066814782] [2022-12-14 09:00:12,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:00:12,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 09:00:12,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 09:00:12,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-12-14 09:00:12,424 INFO L87 Difference]: Start difference. First operand 352 states and 498 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:17,879 INFO L93 Difference]: Finished difference Result 801 states and 981 transitions. [2022-12-14 09:00:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-14 09:00:17,879 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 09:00:17,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:17,880 INFO L225 Difference]: With dead ends: 801 [2022-12-14 09:00:17,880 INFO L226 Difference]: Without dead ends: 778 [2022-12-14 09:00:17,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=937, Invalid=11945, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 09:00:17,881 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 368 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 2326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:17,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1021 Invalid, 2326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 09:00:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-12-14 09:00:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 378. [2022-12-14 09:00:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.4005305039787799) internal successors, (528), 377 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 528 transitions. [2022-12-14 09:00:18,140 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 528 transitions. Word has length 30 [2022-12-14 09:00:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:18,140 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 528 transitions. [2022-12-14 09:00:18,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:18,140 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 528 transitions. [2022-12-14 09:00:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 09:00:18,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:18,141 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:00:18,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-14 09:00:18,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:18,342 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1549923447, now seen corresponding path program 11 times [2022-12-14 09:00:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:18,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749659642] [2022-12-14 09:00:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:18,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:00:18,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:18,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749659642] [2022-12-14 09:00:18,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749659642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:00:18,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609036046] [2022-12-14 09:00:18,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:00:18,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:18,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:00:18,585 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:00:18,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 09:00:18,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:00:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:00:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:00:18,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:00:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-12-14 09:00:18,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:00:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-12-14 09:00:18,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609036046] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:00:18,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875534792] [2022-12-14 09:00:18,870 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:00:18,870 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:00:18,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:00:18,870 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:00:18,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:00:18,934 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:00:19,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34847#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:00:19,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:00:19,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:00:19,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7, 8] total 30 [2022-12-14 09:00:19,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894707975] [2022-12-14 09:00:19,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:00:19,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 09:00:19,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:19,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 09:00:19,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 09:00:19,076 INFO L87 Difference]: Start difference. First operand 378 states and 528 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:26,524 INFO L93 Difference]: Finished difference Result 913 states and 1221 transitions. [2022-12-14 09:00:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-12-14 09:00:26,525 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 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 30 [2022-12-14 09:00:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:26,526 INFO L225 Difference]: With dead ends: 913 [2022-12-14 09:00:26,526 INFO L226 Difference]: Without dead ends: 856 [2022-12-14 09:00:26,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7355 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1687, Invalid=21875, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 09:00:26,527 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 246 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 4103 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 4406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 4103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:26,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 993 Invalid, 4406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 4103 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 09:00:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-12-14 09:00:26,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 391. [2022-12-14 09:00:26,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.3948717948717948) internal successors, (544), 390 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 544 transitions. [2022-12-14 09:00:26,839 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 544 transitions. Word has length 30 [2022-12-14 09:00:26,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:26,839 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 544 transitions. [2022-12-14 09:00:26,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:26,839 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 544 transitions. [2022-12-14 09:00:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 09:00:26,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:26,839 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:00:26,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 09:00:27,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:27,041 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:27,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1775576265, now seen corresponding path program 11 times [2022-12-14 09:00:27,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:27,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890932150] [2022-12-14 09:00:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:27,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 09:00:27,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:27,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890932150] [2022-12-14 09:00:27,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890932150] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:00:27,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534717622] [2022-12-14 09:00:27,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:00:27,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:27,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:00:27,269 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:00:27,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 09:00:27,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:00:27,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:00:27,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:00:27,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:00:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 09:00:27,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:00:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 09:00:27,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534717622] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:00:27,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464816916] [2022-12-14 09:00:27,525 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:00:27,525 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:00:27,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:00:27,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:00:27,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:00:27,585 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:00:27,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37835#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:00:27,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:00:27,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:00:27,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2022-12-14 09:00:27,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000383721] [2022-12-14 09:00:27,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:00:27,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 09:00:27,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:27,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 09:00:27,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2022-12-14 09:00:27,756 INFO L87 Difference]: Start difference. First operand 391 states and 544 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:37,321 INFO L93 Difference]: Finished difference Result 851 states and 1039 transitions. [2022-12-14 09:00:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-12-14 09:00:37,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-14 09:00:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:37,324 INFO L225 Difference]: With dead ends: 851 [2022-12-14 09:00:37,324 INFO L226 Difference]: Without dead ends: 826 [2022-12-14 09:00:37,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5735 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1264, Invalid=16558, Unknown=0, NotChecked=0, Total=17822 [2022-12-14 09:00:37,325 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 589 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:37,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1127 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 2224 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 09:00:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-12-14 09:00:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 369. [2022-12-14 09:00:37,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.4021739130434783) internal successors, (516), 368 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 516 transitions. [2022-12-14 09:00:37,610 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 516 transitions. Word has length 31 [2022-12-14 09:00:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:37,611 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 516 transitions. [2022-12-14 09:00:37,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:00:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 516 transitions. [2022-12-14 09:00:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 09:00:37,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:37,611 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:00:37,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 09:00:37,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 09:00:37,812 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash 143421443, now seen corresponding path program 12 times [2022-12-14 09:00:37,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:37,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238818163] [2022-12-14 09:00:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:37,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 09:00:38,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:38,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238818163] [2022-12-14 09:00:38,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238818163] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:00:38,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030081920] [2022-12-14 09:00:38,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:00:38,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:38,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:00:38,065 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:00:38,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 09:00:38,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:00:38,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:00:38,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 09:00:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:00:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 09:00:38,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:00:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 09:00:38,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030081920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:00:38,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667689986] [2022-12-14 09:00:38,335 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:00:38,335 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:00:38,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:00:38,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:00:38,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:00:38,397 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:00:38,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40481#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:00:38,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:00:38,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:00:38,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2022-12-14 09:00:38,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423582987] [2022-12-14 09:00:38,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:00:38,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 09:00:38,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:38,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 09:00:38,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-12-14 09:00:38,595 INFO L87 Difference]: Start difference. First operand 369 states and 516 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:01:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:01:04,989 INFO L93 Difference]: Finished difference Result 715 states and 945 transitions. [2022-12-14 09:01:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-12-14 09:01:04,990 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-14 09:01:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:01:04,991 INFO L225 Difference]: With dead ends: 715 [2022-12-14 09:01:04,991 INFO L226 Difference]: Without dead ends: 677 [2022-12-14 09:01:04,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16123 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=2572, Invalid=40900, Unknown=0, NotChecked=0, Total=43472 [2022-12-14 09:01:04,993 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 525 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 3516 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 3985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 3516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:01:04,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 409 Invalid, 3985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 3516 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-12-14 09:01:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-12-14 09:01:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 402. [2022-12-14 09:01:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.374064837905237) internal successors, (551), 401 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:01:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 551 transitions. [2022-12-14 09:01:05,318 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 551 transitions. Word has length 31 [2022-12-14 09:01:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:01:05,318 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 551 transitions. [2022-12-14 09:01:05,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:01:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 551 transitions. [2022-12-14 09:01:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 09:01:05,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:01:05,319 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:01:05,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-14 09:01:05,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 09:01:05,520 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:01:05,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:01:05,521 INFO L85 PathProgramCache]: Analyzing trace with hash 136850514, now seen corresponding path program 12 times [2022-12-14 09:01:05,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:01:05,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371804396] [2022-12-14 09:01:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:01:05,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:01:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:01:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:01:05,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:01:05,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371804396] [2022-12-14 09:01:05,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371804396] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:01:05,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869809274] [2022-12-14 09:01:05,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:01:05,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:01:05,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:01:05,658 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:01:05,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 09:01:05,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:01:05,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:01:05,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 09:01:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:01:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:01:05,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:01:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:01:05,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869809274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:01:05,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393242858] [2022-12-14 09:01:05,859 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:01:05,859 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:01:05,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:01:05,859 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:01:05,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:01:05,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:01:06,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43192#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:01:06,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:01:06,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:01:06,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-12-14 09:01:06,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934169655] [2022-12-14 09:01:06,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:01:06,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:01:06,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:01:06,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:01:06,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:01:06,020 INFO L87 Difference]: Start difference. First operand 402 states and 551 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2022-12-14 09:01:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:01:07,982 INFO L93 Difference]: Finished difference Result 671 states and 918 transitions. [2022-12-14 09:01:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 09:01:07,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-14 09:01:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:01:07,984 INFO L225 Difference]: With dead ends: 671 [2022-12-14 09:01:07,984 INFO L226 Difference]: Without dead ends: 652 [2022-12-14 09:01:07,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 09:01:07,985 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 247 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:01:07,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 87 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:01:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-12-14 09:01:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 490. [2022-12-14 09:01:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.4171779141104295) internal successors, (693), 489 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:01:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 693 transitions. [2022-12-14 09:01:08,493 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 693 transitions. Word has length 32 [2022-12-14 09:01:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:01:08,493 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 693 transitions. [2022-12-14 09:01:08,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2022-12-14 09:01:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 693 transitions. [2022-12-14 09:01:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 09:01:08,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:01:08,494 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:01:08,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 09:01:08,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:01:08,695 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:01:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:01:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1208532911, now seen corresponding path program 13 times [2022-12-14 09:01:08,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:01:08,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957122927] [2022-12-14 09:01:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:01:08,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:01:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:01:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:01:08,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:01:08,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957122927] [2022-12-14 09:01:08,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957122927] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:01:08,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36137719] [2022-12-14 09:01:08,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:01:08,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:01:08,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:01:08,992 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:01:08,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab260f79-d3a3-4e8a-99c6-7824d3e06a0e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 09:01:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:01:09,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 09:01:09,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:01:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:01:09,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:01:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:01:09,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36137719] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:01:09,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [514924953] [2022-12-14 09:01:09,760 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:01:09,760 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:01:09,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:01:09,760 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:01:09,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:01:09,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:01:10,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45730#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:01:10,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:01:10,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:01:10,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2022-12-14 09:01:10,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434337385] [2022-12-14 09:01:10,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:01:10,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 09:01:10,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:01:10,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 09:01:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1762, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 09:01:10,041 INFO L87 Difference]: Start difference. First operand 490 states and 693 transitions. Second operand has 43 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:01:37,500 WARN L233 SmtUtils]: Spent 13.03s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:02:09,505 WARN L233 SmtUtils]: Spent 17.32s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:02:28,160 WARN L233 SmtUtils]: Spent 10.29s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:02:59,865 WARN L233 SmtUtils]: Spent 21.69s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:03:24,630 WARN L233 SmtUtils]: Spent 15.16s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:03:41,011 WARN L233 SmtUtils]: Spent 7.94s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:04:10,646 WARN L233 SmtUtils]: Spent 16.30s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:04:12,740 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296))) is different from false [2022-12-14 09:04:38,998 WARN L233 SmtUtils]: Spent 11.60s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:05:12,388 WARN L233 SmtUtils]: Spent 12.16s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:05:28,810 WARN L233 SmtUtils]: Spent 10.80s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:05:41,543 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:06:14,682 WARN L233 SmtUtils]: Spent 17.79s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:06:30,343 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:06:44,265 WARN L233 SmtUtils]: Spent 7.35s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:06:53,985 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:07:00,404 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296))) is different from false [2022-12-14 09:07:25,921 WARN L233 SmtUtils]: Spent 6.35s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:07:35,199 WARN L233 SmtUtils]: Spent 6.84s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)