./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c --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_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/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_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/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_0c30ae26-ab7a-49d0-812f-04c8ec599536/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 240ff53ce4a5324965a3dcaa21fced56af515b108e64af6d36b0fd1ca1a710eb --- 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 15:33:31,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:33:31,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:33:31,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:33:31,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:33:31,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:33:31,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:33:31,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:33:31,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:33:31,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:33:31,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:33:31,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:33:31,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:33:31,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:33:31,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:33:31,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:33:31,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:33:31,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:33:31,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:33:31,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:33:31,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:33:31,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:33:31,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:33:31,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:33:31,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:33:31,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:33:31,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:33:31,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:33:31,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:33:31,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:33:31,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:33:31,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:33:31,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:33:31,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:33:31,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:33:31,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:33:31,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:33:31,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:33:31,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:33:31,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:33:31,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:33:31,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:33:31,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:33:31,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:33:31,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:33:31,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:33:31,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:33:31,918 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:33:31,918 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:33:31,919 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:33:31,919 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:33:31,919 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:33:31,920 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:33:31,921 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:33:31,921 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:33:31,922 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:33:31,922 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:33:31,922 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:33:31,923 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:33:31,923 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:33:31,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:33:31,924 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:33:31,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:33:31,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:33:31,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:33:31,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:33:31,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:33:31,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:33:31,926 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:33:31,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:33:31,927 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:33:31,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:33:31,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:33:31,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:33:31,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:33:31,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:33:31,929 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:33:31,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:33:31,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:33:31,930 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:33:31,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:33:31,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:33:31,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:33:31,932 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_0c30ae26-ab7a-49d0-812f-04c8ec599536/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 240ff53ce4a5324965a3dcaa21fced56af515b108e64af6d36b0fd1ca1a710eb [2022-11-23 15:33:32,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:33:32,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:33:32,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:33:32,297 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:33:32,301 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:33:32,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c [2022-11-23 15:33:35,711 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:33:35,926 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:33:35,926 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c [2022-11-23 15:33:35,933 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/data/6bc60c0cb/81c3a12d4df549eaafbd39a4957c0e3e/FLAG2c1175694 [2022-11-23 15:33:35,950 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/data/6bc60c0cb/81c3a12d4df549eaafbd39a4957c0e3e [2022-11-23 15:33:35,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:33:35,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:33:35,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:33:35,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:33:35,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:33:35,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:35" (1/1) ... [2022-11-23 15:33:35,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11220942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:35, skipping insertion in model container [2022-11-23 15:33:35,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:35" (1/1) ... [2022-11-23 15:33:35,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:33:35,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:33:36,235 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_0c30ae26-ab7a-49d0-812f-04c8ec599536/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c[537,550] [2022-11-23 15:33:36,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:33:36,288 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:33:36,309 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_0c30ae26-ab7a-49d0-812f-04c8ec599536/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c[537,550] [2022-11-23 15:33:36,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:33:36,347 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:33:36,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36 WrapperNode [2022-11-23 15:33:36,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:33:36,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:33:36,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:33:36,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:33:36,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,396 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-23 15:33:36,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:33:36,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:33:36,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:33:36,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:33:36,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,432 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:33:36,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:33:36,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:33:36,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:33:36,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (1/1) ... [2022-11-23 15:33:36,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:33:36,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:36,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:33:36,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:33:36,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:33:36,535 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:33:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:33:36,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:33:36,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:33:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:33:36,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:33:36,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:33:36,612 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:33:36,614 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:33:36,777 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:33:36,818 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:33:36,819 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:33:36,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:36 BoogieIcfgContainer [2022-11-23 15:33:36,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:33:36,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:33:36,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:33:36,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:33:36,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:33:35" (1/3) ... [2022-11-23 15:33:36,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f55a278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:36, skipping insertion in model container [2022-11-23 15:33:36,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:36" (2/3) ... [2022-11-23 15:33:36,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f55a278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:36, skipping insertion in model container [2022-11-23 15:33:36,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:36" (3/3) ... [2022-11-23 15:33:36,847 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound50.c [2022-11-23 15:33:36,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:33:36,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:33:36,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:33:36,963 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;@4e369230, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:33:36,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:33:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 15:33:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 15:33:36,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:36,980 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:36,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1108329425, now seen corresponding path program 1 times [2022-11-23 15:33:37,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:37,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139116988] [2022-11-23 15:33:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:37,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:37,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:37,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139116988] [2022-11-23 15:33:37,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 15:33:37,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023767566] [2022-11-23 15:33:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:37,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:37,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:37,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:37,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:33:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 15:33:37,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:37,451 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 15:33:37,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:37,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023767566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:37,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:37,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:33:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876767643] [2022-11-23 15:33:37,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:37,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:33:37,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:37,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:33:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:33:37,511 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 15:33:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:37,566 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2022-11-23 15:33:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:33:37,569 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 19 [2022-11-23 15:33:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:37,578 INFO L225 Difference]: With dead ends: 34 [2022-11-23 15:33:37,579 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 15:33:37,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 15:33:37,586 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:37,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:33:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 15:33:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-23 15:33:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 15:33:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-23 15:33:37,633 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 19 [2022-11-23 15:33:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:37,636 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-23 15:33:37,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 15:33:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-23 15:33:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 15:33:37,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:37,641 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:37,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:33:37,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 15:33:37,848 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash -591092977, now seen corresponding path program 1 times [2022-11-23 15:33:37,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:37,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503560544] [2022-11-23 15:33:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:37,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:37,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:33:37,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093638619] [2022-11-23 15:33:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:37,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:37,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:37,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:37,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:33:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:38,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 15:33:38,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:33:38,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:38,422 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 15:33:38,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:33:38,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503560544] [2022-11-23 15:33:38,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:33:38,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093638619] [2022-11-23 15:33:38,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093638619] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:33:38,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:33:38,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-23 15:33:38,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681100372] [2022-11-23 15:33:38,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:38,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:33:38,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:33:38,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:33:38,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:33:38,427 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 15:33:40,512 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 15:33:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:40,548 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2022-11-23 15:33:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:33:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 20 [2022-11-23 15:33:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:40,550 INFO L225 Difference]: With dead ends: 30 [2022-11-23 15:33:40,550 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 15:33:40,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:33:40,552 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:40,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 15:33:40,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 15:33:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-23 15:33:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 15:33:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-23 15:33:40,562 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2022-11-23 15:33:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:40,563 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-23 15:33:40,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 15:33:40,563 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-23 15:33:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:33:40,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:40,565 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] [2022-11-23 15:33:40,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 15:33:40,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:40,771 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:40,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1479058285, now seen corresponding path program 1 times [2022-11-23 15:33:40,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:33:40,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409654072] [2022-11-23 15:33:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:40,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:33:40,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:33:40,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714668959] [2022-11-23 15:33:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:40,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:40,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:40,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:33:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2022-11-23 15:33:41,070 WARN L124 FreeRefinementEngine]: Strategy SIFA_TAIPAN was unsuccessful and could not determine trace feasibility [2022-11-23 15:33:41,070 INFO L359 BasicCegarLoop]: Counterexample might be feasible [2022-11-23 15:33:41,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 15:33:41,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:41,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:41,281 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-23 15:33:41,285 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:33:41,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:33:41 BoogieIcfgContainer [2022-11-23 15:33:41,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:33:41,302 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:33:41,302 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:33:41,302 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:33:41,303 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:36" (3/4) ... [2022-11-23 15:33:41,307 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-23 15:33:41,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:33:41,308 INFO L158 Benchmark]: Toolchain (without parser) took 5352.21ms. Allocated memory was 136.3MB in the beginning and 178.3MB in the end (delta: 41.9MB). Free memory was 92.5MB in the beginning and 93.9MB in the end (delta: -1.4MB). Peak memory consumption was 43.3MB. Max. memory is 16.1GB. [2022-11-23 15:33:41,308 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 136.3MB. Free memory is still 82.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:33:41,309 INFO L158 Benchmark]: CACSL2BoogieTranslator took 391.71ms. Allocated memory is still 136.3MB. Free memory was 92.2MB in the beginning and 81.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:33:41,309 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.62ms. Allocated memory is still 136.3MB. Free memory was 81.8MB in the beginning and 80.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:33:41,310 INFO L158 Benchmark]: Boogie Preprocessor took 46.98ms. Allocated memory is still 136.3MB. Free memory was 80.2MB in the beginning and 79.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:33:41,310 INFO L158 Benchmark]: RCFGBuilder took 391.44ms. Allocated memory is still 136.3MB. Free memory was 79.0MB in the beginning and 66.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 15:33:41,311 INFO L158 Benchmark]: TraceAbstraction took 4461.27ms. Allocated memory was 136.3MB in the beginning and 178.3MB in the end (delta: 41.9MB). Free memory was 65.8MB in the beginning and 94.7MB in the end (delta: -28.9MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2022-11-23 15:33:41,311 INFO L158 Benchmark]: Witness Printer took 4.78ms. Allocated memory is still 178.3MB. Free memory was 94.7MB in the beginning and 93.9MB in the end (delta: 828.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:33:41,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 136.3MB. Free memory is still 82.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 391.71ms. Allocated memory is still 136.3MB. Free memory was 92.2MB in the beginning and 81.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.62ms. Allocated memory is still 136.3MB. Free memory was 81.8MB in the beginning and 80.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.98ms. Allocated memory is still 136.3MB. Free memory was 80.2MB in the beginning and 79.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 391.44ms. Allocated memory is still 136.3MB. Free memory was 79.0MB in the beginning and 66.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4461.27ms. Allocated memory was 136.3MB in the beginning and 178.3MB in the end (delta: 41.9MB). Free memory was 65.8MB in the beginning and 94.7MB in the end (delta: -28.9MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. * Witness Printer took 4.78ms. Allocated memory is still 178.3MB. Free memory was 94.7MB in the beginning and 93.9MB in the end (delta: 828.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int counter = 0; [L21] unsigned a, b; [L22] unsigned x, y, u, v; [L23] a = __VERIFIER_nondet_uint() [L24] b = __VERIFIER_nondet_uint() [L25] CALL assume_abort_if_not(a >= 1) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(a >= 1) [L26] CALL assume_abort_if_not(b >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(b >= 1) [L28] CALL assume_abort_if_not(a <= 65535) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(a <= 65535) [L29] CALL assume_abort_if_not(b <= 65535) [L9] COND FALSE !(!cond) [L29] RET assume_abort_if_not(b <= 65535) [L31] x = a [L32] y = b [L33] u = b [L34] v = a [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(x*u + y*v == 2*a*b) [L39] COND FALSE !(!(x != y)) [L42] COND TRUE x > y [L43] x = x - y [L44] v = v + u [L36] EXPR counter++ [L36] COND TRUE counter++<50 [L37] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 82 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 40 IncrementalHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 40 mSDtfsCounter, 40 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=2, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 176 SizeOfPredicates, 2 NumberOfNonLiveVariables, 186 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 35/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-23 15:33:41,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/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_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/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 240ff53ce4a5324965a3dcaa21fced56af515b108e64af6d36b0fd1ca1a710eb --- 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 15:33:43,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:33:43,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:33:43,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:33:43,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:33:43,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:33:43,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:33:43,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:33:43,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:33:43,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:33:43,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:33:43,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:33:43,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:33:43,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:33:43,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:33:43,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:33:43,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:33:43,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:33:43,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:33:43,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:33:43,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:33:43,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:33:43,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:33:43,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:33:43,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:33:43,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:33:43,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:33:43,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:33:43,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:33:43,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:33:43,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:33:43,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:33:43,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:33:43,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:33:43,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:33:43,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:33:43,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:33:43,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:33:43,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:33:43,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:33:43,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:33:43,990 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-23 15:33:44,046 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:33:44,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:33:44,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:33:44,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:33:44,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:33:44,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:33:44,050 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:33:44,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:33:44,051 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:33:44,051 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:33:44,052 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:33:44,052 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:33:44,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:33:44,053 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:33:44,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:33:44,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:33:44,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:33:44,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:33:44,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:33:44,055 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:33:44,055 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 15:33:44,056 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 15:33:44,056 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:33:44,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:33:44,056 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:33:44,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:33:44,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:33:44,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 15:33:44,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:33:44,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:33:44,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:33:44,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:33:44,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:33:44,059 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 15:33:44,059 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 15:33:44,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:33:44,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:33:44,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 15:33:44,060 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_0c30ae26-ab7a-49d0-812f-04c8ec599536/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 240ff53ce4a5324965a3dcaa21fced56af515b108e64af6d36b0fd1ca1a710eb [2022-11-23 15:33:44,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:33:44,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:33:44,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:33:44,533 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:33:44,534 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:33:44,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c [2022-11-23 15:33:47,656 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:33:47,946 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:33:47,947 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c [2022-11-23 15:33:47,954 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/data/d8348228c/bf25216829164131961aa9754da1fd1e/FLAGe0618f7ed [2022-11-23 15:33:47,976 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/data/d8348228c/bf25216829164131961aa9754da1fd1e [2022-11-23 15:33:47,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:33:47,988 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:33:47,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:33:47,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:33:47,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:33:47,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:47" (1/1) ... [2022-11-23 15:33:48,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f0fbc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48, skipping insertion in model container [2022-11-23 15:33:48,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:33:47" (1/1) ... [2022-11-23 15:33:48,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:33:48,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:33:48,222 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_0c30ae26-ab7a-49d0-812f-04c8ec599536/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c[537,550] [2022-11-23 15:33:48,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:33:48,255 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:33:48,271 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_0c30ae26-ab7a-49d0-812f-04c8ec599536/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound50.c[537,550] [2022-11-23 15:33:48,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:33:48,300 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:33:48,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48 WrapperNode [2022-11-23 15:33:48,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:33:48,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:33:48,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:33:48,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:33:48,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,355 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-23 15:33:48,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:33:48,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:33:48,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:33:48,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:33:48,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,396 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:33:48,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:33:48,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:33:48,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:33:48,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (1/1) ... [2022-11-23 15:33:48,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:33:48,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:48,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:33:48,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:33:48,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:33:48,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 15:33:48,576 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:33:48,576 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:33:48,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:33:48,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:33:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:33:48,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:33:48,659 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:33:48,661 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:33:48,915 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:33:48,922 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:33:48,934 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:33:48,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:48 BoogieIcfgContainer [2022-11-23 15:33:48,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:33:48,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:33:48,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:33:48,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:33:48,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:33:47" (1/3) ... [2022-11-23 15:33:48,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f008de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:48, skipping insertion in model container [2022-11-23 15:33:48,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:33:48" (2/3) ... [2022-11-23 15:33:48,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f008de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:33:48, skipping insertion in model container [2022-11-23 15:33:48,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:33:48" (3/3) ... [2022-11-23 15:33:48,965 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound50.c [2022-11-23 15:33:48,987 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:33:48,988 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:33:49,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:33:49,048 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;@2269cfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:33:49,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:33:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 15:33:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:33:49,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:49,063 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:49,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:49,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:49,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1908356592, now seen corresponding path program 1 times [2022-11-23 15:33:49,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:33:49,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419447134] [2022-11-23 15:33:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:49,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:33:49,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:33:49,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:33:49,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 15:33:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:49,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 15:33:49,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:33:49,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:49,360 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:33:49,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419447134] [2022-11-23 15:33:49,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419447134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:49,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:49,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:33:49,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983787633] [2022-11-23 15:33:49,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:49,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:33:49,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:33:49,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:33:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:33:49,416 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 5.0) internal successors, (10), 2 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 15:33:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:49,454 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2022-11-23 15:33:49,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:33:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 28 [2022-11-23 15:33:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:49,465 INFO L225 Difference]: With dead ends: 51 [2022-11-23 15:33:49,465 INFO L226 Difference]: Without dead ends: 23 [2022-11-23 15:33:49,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 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 15:33:49,474 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:49,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:33:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-23 15:33:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-23 15:33:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 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 15:33:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-11-23 15:33:49,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 28 [2022-11-23 15:33:49,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:49,522 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-11-23 15:33:49,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 15:33:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-11-23 15:33:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 15:33:49,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:49,524 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:49,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-23 15:33:49,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:33:49,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:49,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash 384922192, now seen corresponding path program 1 times [2022-11-23 15:33:49,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:33:49,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139063705] [2022-11-23 15:33:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:49,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:33:49,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:33:49,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:33:49,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 15:33:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:33:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:33:50,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:50,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:33:50,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139063705] [2022-11-23 15:33:50,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139063705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:50,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:50,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:33:50,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160482243] [2022-11-23 15:33:50,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:50,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:33:50,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:33:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:33:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:33:50,071 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15:33:52,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:33:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:52,539 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-11-23 15:33:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:33:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 29 [2022-11-23 15:33:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:52,543 INFO L225 Difference]: With dead ends: 35 [2022-11-23 15:33:52,543 INFO L226 Difference]: Without dead ends: 33 [2022-11-23 15:33:52,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:33:52,545 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:52,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 15:33:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-23 15:33:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-11-23 15:33:52,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:33:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-23 15:33:52,572 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 29 [2022-11-23 15:33:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:52,574 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-23 15:33:52,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15:33:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-23 15:33:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 15:33:52,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:52,576 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:52,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:52,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:33:52,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:52,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:52,793 INFO L85 PathProgramCache]: Analyzing trace with hash 383134732, now seen corresponding path program 1 times [2022-11-23 15:33:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:33:52,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256021607] [2022-11-23 15:33:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:52,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:33:52,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:33:52,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:33:52,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 15:33:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:52,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:33:52,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:33:53,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:33:53,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:33:53,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256021607] [2022-11-23 15:33:53,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256021607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:33:53,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:33:53,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:33:53,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904594878] [2022-11-23 15:33:53,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:33:53,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:33:53,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:33:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:33:53,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:33:53,075 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15:33:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:33:53,129 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-23 15:33:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:33:53,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 29 [2022-11-23 15:33:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:33:53,132 INFO L225 Difference]: With dead ends: 37 [2022-11-23 15:33:53,132 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 15:33:53,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:33:53,134 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:33:53,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:33:53,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 15:33:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 15:33:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:33:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-23 15:33:53,155 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 29 [2022-11-23 15:33:53,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:33:53,155 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-23 15:33:53,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15:33:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-23 15:33:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 15:33:53,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:33:53,157 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:33:53,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:33:53,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:33:53,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:33:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:33:53,359 INFO L85 PathProgramCache]: Analyzing trace with hash -296587984, now seen corresponding path program 1 times [2022-11-23 15:33:53,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:33:53,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839805104] [2022-11-23 15:33:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:53,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:33:53,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:33:53,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:33:53,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 15:33:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:53,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:33:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:33:54,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:33:56,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:33:56,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839805104] [2022-11-23 15:33:56,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839805104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:56,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1604020639] [2022-11-23 15:33:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:56,491 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:33:56,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:33:56,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:33:56,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-23 15:33:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:56,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:33:56,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:33:56,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:33:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:33:58,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1604020639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:33:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432110703] [2022-11-23 15:33:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:33:58,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:33:58,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:33:58,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:33:58,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:33:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:33:58,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:33:58,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:33:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:33:58,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:34:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:34:00,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432110703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:34:00,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:34:00,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 9 [2022-11-23 15:34:00,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336740845] [2022-11-23 15:34:00,004 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:34:00,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:34:00,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:34:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:34:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:34:00,006 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 15:34:03,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:34:05,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:34:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:34:05,969 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-11-23 15:34:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:34:05,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 35 [2022-11-23 15:34:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:34:05,978 INFO L225 Difference]: With dead ends: 37 [2022-11-23 15:34:05,978 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 15:34:05,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:34:05,980 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:34:05,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 108 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-11-23 15:34:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 15:34:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 15:34:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:34:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-23 15:34:05,990 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 35 [2022-11-23 15:34:05,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:34:05,990 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-23 15:34:05,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 15:34:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-23 15:34:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 15:34:05,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:34:05,993 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:34:06,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:06,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:06,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:34:06,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:34:06,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:34:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:34:06,608 INFO L85 PathProgramCache]: Analyzing trace with hash -449676311, now seen corresponding path program 1 times [2022-11-23 15:34:06,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:34:06,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278380911] [2022-11-23 15:34:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:34:06,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:34:06,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:34:06,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:34:06,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c30ae26-ab7a-49d0-812f-04c8ec599536/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process