./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:40:43,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:40:43,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:40:43,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:40:43,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:40:43,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:40:43,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:40:43,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:40:43,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:40:43,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:40:43,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:40:43,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:40:43,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:40:43,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:40:43,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:40:43,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:40:43,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:40:43,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:40:43,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:40:43,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:40:43,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:40:43,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:40:43,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:40:43,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:40:43,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:40:43,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:40:43,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:40:43,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:40:43,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:40:43,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:40:43,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:40:43,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:40:43,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:40:43,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:40:43,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:40:43,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:40:43,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:40:43,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:40:43,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:40:43,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:40:43,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:40:43,925 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:40:43,978 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:40:43,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:40:43,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:40:43,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:40:43,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:40:43,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:40:43,982 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:40:43,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:40:43,982 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:40:43,983 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:40:43,984 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:40:43,985 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:40:43,985 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:40:43,985 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:40:43,985 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:40:43,986 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:40:43,986 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:40:43,987 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:40:43,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:40:43,988 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:40:43,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:40:43,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:40:43,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:40:43,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:40:43,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:40:43,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:40:43,991 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:40:43,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:40:43,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:40:43,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:40:43,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:40:43,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:40:43,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:40:43,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:40:43,994 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:40:43,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:40:43,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:40:43,996 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:40:43,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:40:43,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:40:43,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:40:43,999 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_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a95a21aef2f50b6142b75e9167422e223cf73e944019da3877f24b8f537b25b5 [2022-11-26 00:40:44,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:40:44,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:40:44,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:40:44,470 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:40:44,475 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:40:44,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-11-26 00:40:48,212 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:40:48,488 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:40:48,489 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2022-11-26 00:40:48,497 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/data/8cd96ac04/d18a3fd1593d41dd8db24a3331f20892/FLAG9f0037f10 [2022-11-26 00:40:48,516 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/data/8cd96ac04/d18a3fd1593d41dd8db24a3331f20892 [2022-11-26 00:40:48,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:40:48,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:40:48,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:40:48,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:40:48,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:40:48,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f500d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48, skipping insertion in model container [2022-11-26 00:40:48,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:40:48,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:40:48,753 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_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c[537,550] [2022-11-26 00:40:48,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:40:48,782 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:40:48,796 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_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c[537,550] [2022-11-26 00:40:48,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:40:48,817 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:40:48,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48 WrapperNode [2022-11-26 00:40:48,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:40:48,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:40:48,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:40:48,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:40:48,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,868 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-26 00:40:48,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:40:48,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:40:48,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:40:48,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:40:48,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,909 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:40:48,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:40:48,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:40:48,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:40:48,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (1/1) ... [2022-11-26 00:40:48,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:40:48,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:48,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:40:48,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:40:49,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:40:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:40:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:40:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:40:49,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:40:49,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:40:49,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:40:49,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:40:49,124 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:40:49,127 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:40:49,330 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:40:49,391 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:40:49,391 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:40:49,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:40:49 BoogieIcfgContainer [2022-11-26 00:40:49,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:40:49,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:40:49,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:40:49,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:40:49,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:40:48" (1/3) ... [2022-11-26 00:40:49,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea376b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:40:49, skipping insertion in model container [2022-11-26 00:40:49,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:40:48" (2/3) ... [2022-11-26 00:40:49,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea376b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:40:49, skipping insertion in model container [2022-11-26 00:40:49,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:40:49" (3/3) ... [2022-11-26 00:40:49,406 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2022-11-26 00:40:49,432 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:40:49,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:40:49,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:40:49,495 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;@32af66a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:40:49,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:40:49,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:40:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:40:49,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:49,513 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:49,513 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:49,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1772938727, now seen corresponding path program 1 times [2022-11-26 00:40:49,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:49,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973682605] [2022-11-26 00:40:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:49,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:49,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:40:49,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001171488] [2022-11-26 00:40:49,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:49,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:49,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:49,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:40:49,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:40:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:40:49,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:40:50,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:40:50,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:50,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973682605] [2022-11-26 00:40:50,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:40:50,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001171488] [2022-11-26 00:40:50,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001171488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:50,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:50,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:40:50,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114344092] [2022-11-26 00:40:50,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:40:50,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:40:50,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:40:50,246 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:40:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:50,437 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-11-26 00:40:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:40:50,440 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-11-26 00:40:50,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:50,450 INFO L225 Difference]: With dead ends: 42 [2022-11-26 00:40:50,451 INFO L226 Difference]: Without dead ends: 26 [2022-11-26 00:40:50,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:40:50,460 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:50,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:40:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-26 00:40:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-11-26 00:40:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:40:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-26 00:40:50,521 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-11-26 00:40:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:50,525 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-26 00:40:50,525 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:40:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-26 00:40:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:40:50,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:50,528 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:50,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:40:50,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:50,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1457957052, now seen corresponding path program 1 times [2022-11-26 00:40:50,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:50,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919644777] [2022-11-26 00:40:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:50,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:50,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:40:50,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858026274] [2022-11-26 00:40:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:50,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:50,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:50,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:40:50,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:40:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:50,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:40:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:40:50,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:40:50,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:50,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919644777] [2022-11-26 00:40:50,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:40:50,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858026274] [2022-11-26 00:40:50,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858026274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:40:50,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:40:50,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:40:50,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892563846] [2022-11-26 00:40:50,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:40:50,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:40:50,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:40:50,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:40:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:40:50,932 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:40:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:51,004 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-11-26 00:40:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:40:51,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2022-11-26 00:40:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:51,006 INFO L225 Difference]: With dead ends: 32 [2022-11-26 00:40:51,006 INFO L226 Difference]: Without dead ends: 25 [2022-11-26 00:40:51,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:40:51,009 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:51,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:40:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-26 00:40:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-26 00:40:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:40:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-26 00:40:51,018 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2022-11-26 00:40:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:51,019 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-26 00:40:51,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:40:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-26 00:40:51,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:40:51,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:51,021 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:40:51,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:40:51,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-26 00:40:51,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:40:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:51,230 INFO L85 PathProgramCache]: Analyzing trace with hash -489488164, now seen corresponding path program 1 times [2022-11-26 00:40:51,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:40:51,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016902422] [2022-11-26 00:40:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:51,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:40:51,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:40:51,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023411364] [2022-11-26 00:40:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:40:51,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:51,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:51,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:40:51,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:40:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:40:51,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-26 00:40:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:40:52,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:40:59,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:40:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016902422] [2022-11-26 00:40:59,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:40:59,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023411364] [2022-11-26 00:40:59,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023411364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:59,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [985150335] [2022-11-26 00:40:59,127 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:40:59,128 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:40:59,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:40:59,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:40:59,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:00,229 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-26 00:41:00,387 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:41:00,390 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:05,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '482#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:05,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:05,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:41:05,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-26 00:41:05,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626627414] [2022-11-26 00:41:05,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:05,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:41:05,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:05,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:41:05,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:41:05,734 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-26 00:41:12,654 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 47 DAG size of output: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:41:15,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:17,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:17,818 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-26 00:41:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:41:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 24 [2022-11-26 00:41:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:17,821 INFO L225 Difference]: With dead ends: 40 [2022-11-26 00:41:17,821 INFO L226 Difference]: Without dead ends: 38 [2022-11-26 00:41:17,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:41:17,824 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:17,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 68 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-26 00:41:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-26 00:41:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-11-26 00:41:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:41:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-11-26 00:41:17,840 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2022-11-26 00:41:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:17,840 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-11-26 00:41:17,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-26 00:41:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-11-26 00:41:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 00:41:17,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:17,843 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:17,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:18,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:18,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash 750858559, now seen corresponding path program 1 times [2022-11-26 00:41:18,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:18,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580446801] [2022-11-26 00:41:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:18,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:18,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:41:18,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219512608] [2022-11-26 00:41:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:18,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:18,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:18,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:18,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:41:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:18,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:41:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:41:18,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:41:18,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580446801] [2022-11-26 00:41:18,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:41:18,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219512608] [2022-11-26 00:41:18,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219512608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:18,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016678955] [2022-11-26 00:41:18,853 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:41:18,854 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:18,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:18,855 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:18,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:19,724 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-26 00:41:19,730 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:41:19,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:20,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '802#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:20,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:20,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:41:20,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-26 00:41:20,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491371006] [2022-11-26 00:41:20,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:20,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:41:20,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:41:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:41:20,819 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:41:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:21,003 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-11-26 00:41:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:41:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2022-11-26 00:41:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:21,006 INFO L225 Difference]: With dead ends: 43 [2022-11-26 00:41:21,006 INFO L226 Difference]: Without dead ends: 36 [2022-11-26 00:41:21,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:41:21,008 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:21,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 64 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:41:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-26 00:41:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-26 00:41:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:41:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-11-26 00:41:21,022 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2022-11-26 00:41:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:21,023 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-11-26 00:41:21,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:41:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-11-26 00:41:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 00:41:21,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:21,025 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:21,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-26 00:41:21,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:21,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash -997597351, now seen corresponding path program 2 times [2022-11-26 00:41:21,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:21,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282156393] [2022-11-26 00:41:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:21,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:21,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:41:21,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140546670] [2022-11-26 00:41:21,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:41:21,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:21,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:21,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:21,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:41:21,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:41:21,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:41:21,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-26 00:41:21,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:41:31,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:40,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:40,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282156393] [2022-11-26 00:41:40,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:41:40,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140546670] [2022-11-26 00:41:40,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140546670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:40,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811608300] [2022-11-26 00:41:40,511 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:41:40,511 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:40,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:40,512 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:40,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:41,128 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-26 00:41:41,216 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:41:41,218 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:52,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1130#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:52,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:52,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:41:52,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-26 00:41:52,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077839164] [2022-11-26 00:41:52,876 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:52,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:41:52,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:52,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:41:52,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1021, Unknown=2, NotChecked=0, Total=1190 [2022-11-26 00:41:52,884 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:41:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:55,345 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-11-26 00:41:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:41:55,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 45 [2022-11-26 00:41:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:55,348 INFO L225 Difference]: With dead ends: 46 [2022-11-26 00:41:55,348 INFO L226 Difference]: Without dead ends: 44 [2022-11-26 00:41:55,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=184, Invalid=1146, Unknown=2, NotChecked=0, Total=1332 [2022-11-26 00:41:55,350 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:55,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 83 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 00:41:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-26 00:41:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-26 00:41:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-26 00:41:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-26 00:41:55,393 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 45 [2022-11-26 00:41:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:55,396 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-26 00:41:55,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 00:41:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-26 00:41:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:41:55,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:55,406 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:55,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:55,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:55,614 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:55,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:55,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1414540388, now seen corresponding path program 3 times [2022-11-26 00:41:55,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:55,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488998895] [2022-11-26 00:41:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:55,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:55,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:41:55,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365243540] [2022-11-26 00:41:55,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:41:55,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:55,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:55,636 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:55,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c775de0-0e6b-41f5-be6a-95e6b3a7cce2/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:42:02,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:42:02,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:42:02,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-26 00:42:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:29,801 WARN L233 SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 163 DAG size of output: 162 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:44:30,419 WARN L233 SmtUtils]: Spent 50.80s on a formula simplification that was a NOOP. DAG size: 151 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:48:33,300 WARN L233 SmtUtils]: Spent 3.74m on a formula simplification. DAG size of input: 272 DAG size of output: 257 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:49:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-26 00:49:20,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:49:49,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:49,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488998895] [2022-11-26 00:49:49,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:49:49,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365243540] [2022-11-26 00:49:49,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365243540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:49,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [52309517] [2022-11-26 00:49:49,519 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:49:49,520 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:49:49,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:49:49,521 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:49:49,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:49:50,189 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-26 00:49:50,323 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-26 00:49:50,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:50:02,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1494#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-26 00:50:02,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:50:02,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:50:02,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-26 00:50:02,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230266621] [2022-11-26 00:50:02,859 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 00:50:02,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:50:02,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:02,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:50:02,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1086, Unknown=13, NotChecked=0, Total=1260 [2022-11-26 00:50:02,861 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-26 00:50:08,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:50:39,595 WARN L233 SmtUtils]: Spent 22.60s on a formula simplification. DAG size of input: 141 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:50:41,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:50:43,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:50:46,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:50:48,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 00:50:51,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]