./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW --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 d02047a3b9d197f6609f19d430d458b8d82d1972f1adb7857eb26188e13a592b --- 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-4e7fbc6 [2022-11-23 15:06:42,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:06:42,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:06:42,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:06:42,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:06:42,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:06:42,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:06:42,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:06:42,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:06:42,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:06:42,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:06:42,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:06:42,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:06:42,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:06:42,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:06:42,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:06:42,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:06:42,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:06:42,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:06:42,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:06:42,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:06:42,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:06:42,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:06:42,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:06:42,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:06:42,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:06:42,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:06:42,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:06:42,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:06:42,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:06:42,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:06:42,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:06:42,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:06:42,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:06:42,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:06:42,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:06:42,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:06:42,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:06:42,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:06:42,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:06:42,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:06:42,836 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:06:42,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:06:42,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:06:42,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:06:42,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:06:42,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:06:42,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:06:42,860 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:06:42,861 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:06:42,861 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:06:42,861 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:06:42,861 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:06:42,861 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:06:42,862 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:06:42,862 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:06:42,862 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:06:42,862 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:06:42,863 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:06:42,863 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:06:42,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:06:42,864 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:06:42,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:06:42,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:06:42,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:06:42,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:06:42,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:06:42,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:06:42,865 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:06:42,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:06:42,865 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:06:42,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:06:42,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:06:42,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:06:42,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:06:42,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:06:42,867 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:06:42,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:06:42,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:06:42,867 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:06:42,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:06:42,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:06:42,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:06:42,868 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_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d02047a3b9d197f6609f19d430d458b8d82d1972f1adb7857eb26188e13a592b [2022-11-23 15:06:43,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:06:43,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:06:43,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:06:43,203 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:06:43,203 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:06:43,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i [2022-11-23 15:06:46,291 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:06:46,499 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:06:46,499 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i [2022-11-23 15:06:46,506 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/data/fc9bb5483/98a6c10fd2c945ca954262583e258d10/FLAG08a442eea [2022-11-23 15:06:46,532 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/data/fc9bb5483/98a6c10fd2c945ca954262583e258d10 [2022-11-23 15:06:46,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:06:46,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:06:46,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:06:46,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:06:46,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:06:46,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a7ee786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46, skipping insertion in model container [2022-11-23 15:06:46,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:06:46,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:06:46,813 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_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i[950,963] [2022-11-23 15:06:46,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:06:46,856 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:06:46,872 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_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound5.i[950,963] [2022-11-23 15:06:46,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:06:46,911 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:06:46,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46 WrapperNode [2022-11-23 15:06:46,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:06:46,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:06:46,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:06:46,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:06:46,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,948 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-11-23 15:06:46,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:06:46,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:06:46,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:06:46,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:06:46,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,987 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:46,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:06:46,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:06:46,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:06:46,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:06:46,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (1/1) ... [2022-11-23 15:06:47,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:06:47,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:47,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:06:47,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:06:47,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:06:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:06:47,082 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:06:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:06:47,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:06:47,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:06:47,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:06:47,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:06:47,149 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:06:47,152 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:06:47,363 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:06:47,441 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:06:47,454 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:06:47,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:06:47 BoogieIcfgContainer [2022-11-23 15:06:47,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:06:47,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:06:47,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:06:47,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:06:47,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:06:46" (1/3) ... [2022-11-23 15:06:47,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b425dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:06:47, skipping insertion in model container [2022-11-23 15:06:47,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:06:46" (2/3) ... [2022-11-23 15:06:47,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b425dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:06:47, skipping insertion in model container [2022-11-23 15:06:47,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:06:47" (3/3) ... [2022-11-23 15:06:47,465 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound5.i [2022-11-23 15:06:47,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:06:47,494 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:06:47,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:06:47,570 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;@3a4ea7a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:06:47,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:06:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:06:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 15:06:47,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:47,583 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:47,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:47,592 INFO L85 PathProgramCache]: Analyzing trace with hash 40099495, now seen corresponding path program 1 times [2022-11-23 15:06:47,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:47,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643886343] [2022-11-23 15:06:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:47,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:47,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643886343] [2022-11-23 15:06:47,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 15:06:47,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952049600] [2022-11-23 15:06:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:47,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:47,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:47,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:06:47,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:06:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 15:06:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:06:47,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:06:47,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952049600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:47,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:06:47,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:06:47,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103103786] [2022-11-23 15:06:47,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:47,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:06:47,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:48,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:06:48,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:06:48,021 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 15:06:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:48,069 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2022-11-23 15:06:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:06:48,072 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2022-11-23 15:06:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:48,079 INFO L225 Difference]: With dead ends: 35 [2022-11-23 15:06:48,079 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 15:06:48,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:06:48,087 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:48,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:06:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 15:06:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-23 15:06:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 15:06:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-23 15:06:48,132 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 21 [2022-11-23 15:06:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:48,134 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-23 15:06:48,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 15:06:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-23 15:06:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:06:48,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:48,137 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:48,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:06:48,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 15:06:48,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:48,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2056079682, now seen corresponding path program 1 times [2022-11-23 15:06:48,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:48,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139806494] [2022-11-23 15:06:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:48,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:48,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:06:48,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047652189] [2022-11-23 15:06:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:48,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:48,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:48,385 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:06:48,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:06:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:48,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 15:06:48,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:06:48,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:06:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:06:49,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:49,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139806494] [2022-11-23 15:06:49,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:06:49,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047652189] [2022-11-23 15:06:49,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047652189] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:06:49,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:06:49,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-23 15:06:49,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15872398] [2022-11-23 15:06:49,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:49,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:06:49,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:49,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:06:49,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:06:49,100 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 15:06:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:49,567 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-11-23 15:06:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:06:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2022-11-23 15:06:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:49,569 INFO L225 Difference]: With dead ends: 33 [2022-11-23 15:06:49,569 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 15:06:49,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:06:49,570 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:49,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:06:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 15:06:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 15:06:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:06:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-23 15:06:49,589 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2022-11-23 15:06:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:49,591 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-23 15:06:49,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 15:06:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-23 15:06:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 15:06:49,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:49,593 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:49,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:06:49,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:49,794 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:49,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:49,794 INFO L85 PathProgramCache]: Analyzing trace with hash 190159033, now seen corresponding path program 1 times [2022-11-23 15:06:49,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:49,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136987203] [2022-11-23 15:06:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:49,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:49,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:06:49,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110744597] [2022-11-23 15:06:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:49,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:49,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:49,812 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:06:49,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:06:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:49,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 15:06:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:06:50,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:06:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:06:50,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:50,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136987203] [2022-11-23 15:06:50,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:06:50,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110744597] [2022-11-23 15:06:50,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110744597] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:06:50,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:06:50,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-23 15:06:50,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052899465] [2022-11-23 15:06:50,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:50,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:06:50,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:06:50,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:06:50,307 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 15:06:52,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-23 15:06:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:52,578 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-23 15:06:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:06:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2022-11-23 15:06:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:52,580 INFO L225 Difference]: With dead ends: 40 [2022-11-23 15:06:52,580 INFO L226 Difference]: Without dead ends: 37 [2022-11-23 15:06:52,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-23 15:06:52,582 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:52,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 79 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-23 15:06:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-23 15:06:52,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-11-23 15:06:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:06:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-23 15:06:52,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2022-11-23 15:06:52,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:52,591 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-23 15:06:52,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 15:06:52,592 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-23 15:06:52,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 15:06:52,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:52,593 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:52,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:06:52,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:52,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2136592426, now seen corresponding path program 1 times [2022-11-23 15:06:52,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:52,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057863690] [2022-11-23 15:06:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:52,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:52,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:06:52,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377558087] [2022-11-23 15:06:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:52,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:52,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:52,833 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:06:52,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:06:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:52,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:06:52,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:06:52,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:06:52,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:52,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057863690] [2022-11-23 15:06:52,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:06:52,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377558087] [2022-11-23 15:06:52,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377558087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:52,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:06:52,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:06:52,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492256858] [2022-11-23 15:06:52,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:52,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:06:52,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:52,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:06:52,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:06:52,916 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 15:06:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:52,959 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-11-23 15:06:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:06:52,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2022-11-23 15:06:52,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:52,962 INFO L225 Difference]: With dead ends: 43 [2022-11-23 15:06:52,967 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 15:06:52,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:06:52,973 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:52,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:06:52,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 15:06:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 15:06:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:06:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-23 15:06:52,993 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 29 [2022-11-23 15:06:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:52,994 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-23 15:06:52,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 15:06:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-23 15:06:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 15:06:52,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:52,996 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:53,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:06:53,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:53,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:53,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1183920689, now seen corresponding path program 1 times [2022-11-23 15:06:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:53,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816778609] [2022-11-23 15:06:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:53,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:06:53,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852129168] [2022-11-23 15:06:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:53,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:53,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:53,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:06:53,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:06:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:53,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 15:06:53,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:06:55,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:12,832 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:07:31,289 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse5 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (let ((.cse3 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse1)) (<= (* 2 .cse4) .cse5) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse5)))) is different from true [2022-11-23 15:07:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2022-11-23 15:07:45,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:45,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816778609] [2022-11-23 15:07:45,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:07:45,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852129168] [2022-11-23 15:07:45,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852129168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:45,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1669615276] [2022-11-23 15:07:45,644 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-23 15:07:45,644 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:45,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:45,653 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:45,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:46,731 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-23 15:07:46,755 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-11-23 15:07:46,767 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:08:02,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1049#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:08:02,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:08:02,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:08:02,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2022-11-23 15:08:02,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930005383] [2022-11-23 15:08:02,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:08:02,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:08:02,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:02,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:08:02,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=915, Unknown=3, NotChecked=62, Total=1122 [2022-11-23 15:08:02,783 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 15:08:05,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:08:06,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:08:08,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:08:10,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:08:13,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:08:16,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:08:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:25,723 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-23 15:08:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 15:08:25,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-11-23 15:08:25,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:25,725 INFO L225 Difference]: With dead ends: 40 [2022-11-23 15:08:25,725 INFO L226 Difference]: Without dead ends: 36 [2022-11-23 15:08:25,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=207, Invalid=1354, Unknown=3, NotChecked=76, Total=1640 [2022-11-23 15:08:25,727 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:25,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 96 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 205 Invalid, 3 Unknown, 33 Unchecked, 16.6s Time] [2022-11-23 15:08:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-23 15:08:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-11-23 15:08:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 15:08:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-23 15:08:25,739 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2022-11-23 15:08:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:25,739 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-23 15:08:25,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 15:08:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-23 15:08:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 15:08:25,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:25,741 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:25,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:25,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:25,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash 953799673, now seen corresponding path program 2 times [2022-11-23 15:08:25,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:25,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058187907] [2022-11-23 15:08:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:25,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:25,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:08:25,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295714044] [2022-11-23 15:08:25,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:08:25,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:25,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:25,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:25,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:08:26,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:08:26,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:08:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:08:26,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:08:27,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:08:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:08:28,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:28,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058187907] [2022-11-23 15:08:28,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:08:28,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295714044] [2022-11-23 15:08:28,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295714044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:08:28,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100944630] [2022-11-23 15:08:28,235 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-23 15:08:28,235 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:08:28,236 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:08:28,236 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:08:28,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:08:29,212 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-23 15:08:29,237 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-11-23 15:08:29,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:08:30,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1421#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:08:30,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:08:30,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:08:30,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2022-11-23 15:08:30,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809947768] [2022-11-23 15:08:30,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:08:30,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:08:30,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:30,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:08:30,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-11-23 15:08:30,505 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-23 15:08:33,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:08:36,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:08:38,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:08:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:38,693 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-11-23 15:08:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:08:38,694 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 38 [2022-11-23 15:08:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:38,697 INFO L225 Difference]: With dead ends: 52 [2022-11-23 15:08:38,697 INFO L226 Difference]: Without dead ends: 37 [2022-11-23 15:08:38,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-11-23 15:08:38,699 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 17 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:38,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 71 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 97 Invalid, 3 Unknown, 0 Unchecked, 7.6s Time] [2022-11-23 15:08:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-23 15:08:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-23 15:08:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 15:08:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-23 15:08:38,710 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 38 [2022-11-23 15:08:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:38,710 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-23 15:08:38,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-23 15:08:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-23 15:08:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 15:08:38,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:38,712 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:38,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:38,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:08:38,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash 493314036, now seen corresponding path program 3 times [2022-11-23 15:08:38,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:38,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132331982] [2022-11-23 15:08:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:38,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:38,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:08:38,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129646825] [2022-11-23 15:08:38,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:08:38,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:38,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:38,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:38,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:08:40,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:08:40,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:08:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-23 15:08:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:08:45,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:09:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:09:05,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132331982] [2022-11-23 15:09:05,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:09:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129646825] [2022-11-23 15:09:05,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129646825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:09:05,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [974639516] [2022-11-23 15:09:05,997 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-23 15:09:05,998 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:09:05,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:09:05,998 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:09:05,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:09:06,985 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-23 15:09:07,034 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-11-23 15:09:07,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:09:14,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1832#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:09:14,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:09:14,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:09:14,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2022-11-23 15:09:14,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491137723] [2022-11-23 15:09:14,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:09:14,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 15:09:14,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 15:09:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1096, Unknown=2, NotChecked=0, Total=1260 [2022-11-23 15:09:14,996 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-23 15:10:58,911 WARN L233 SmtUtils]: Spent 1.50m on a formula simplification that was a NOOP. DAG size: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:01,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:11:03,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:11:05,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:11:07,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:11:21,084 WARN L233 SmtUtils]: Spent 5.73s 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) [2022-11-23 15:11:23,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:11:26,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:11:28,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:11:30,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:12:13,685 WARN L233 SmtUtils]: Spent 34.31s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:12:15,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:12:17,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:12:23,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:12:26,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:12:28,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:12:51,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:12:53,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:13:03,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:13:07,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:13:08,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:13:22,329 WARN L233 SmtUtils]: Spent 8.61s on a formula simplification. DAG size of input: 73 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:13:25,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:13:27,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:13:29,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:13:33,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:13:35,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:13:37,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:13:39,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:14:12,778 WARN L233 SmtUtils]: Spent 14.17s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:14:13,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:14:15,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:14:18,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:14:20,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:14:23,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:14:24,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:14:38,903 WARN L233 SmtUtils]: Spent 9.01s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:14:40,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:14:42,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:14:54,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:15:01,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:15:03,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:15:06,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:15:07,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:15:08,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:08,606 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2022-11-23 15:15:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 15:15:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 40 [2022-11-23 15:15:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:08,608 INFO L225 Difference]: With dead ends: 90 [2022-11-23 15:15:08,608 INFO L226 Difference]: Without dead ends: 88 [2022-11-23 15:15:08,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 279.4s TimeCoverageRelationStatistics Valid=307, Invalid=1925, Unknown=24, NotChecked=0, Total=2256 [2022-11-23 15:15:08,610 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 100 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 55 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:08,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 174 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 384 Invalid, 28 Unknown, 0 Unchecked, 97.6s Time] [2022-11-23 15:15:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-23 15:15:08,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2022-11-23 15:15:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 15:15:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-11-23 15:15:08,669 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 40 [2022-11-23 15:15:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:08,672 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-11-23 15:15:08,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-23 15:15:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-11-23 15:15:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 15:15:08,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:08,682 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:15:08,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 15:15:08,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:15:08,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:15:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1417331559, now seen corresponding path program 4 times [2022-11-23 15:15:08,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:08,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882611635] [2022-11-23 15:15:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:08,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:08,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:15:08,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361376145] [2022-11-23 15:15:08,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:15:08,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:08,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:08,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:08,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fb51f5f-e93a-45ff-adea-3b8b10dfda39/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:15:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:17,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 15:15:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:19:20,112 WARN L233 SmtUtils]: Spent 9.94s on a formula simplification. DAG size of input: 132 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)