./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.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_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/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_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/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_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/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 ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --- 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 00:27:21,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:27:21,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:27:21,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:27:21,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:27:21,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:27:21,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:27:21,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:27:21,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:27:21,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:27:21,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:27:21,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:27:21,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:27:21,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:27:21,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:27:21,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:27:21,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:27:21,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:27:21,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:27:21,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:27:21,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:27:21,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:27:21,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:27:21,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:27:21,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:27:21,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:27:21,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:27:21,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:27:21,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:27:21,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:27:21,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:27:21,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:27:21,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:27:21,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:27:21,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:27:21,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:27:21,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:27:21,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:27:21,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:27:21,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:27:21,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:27:21,987 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:27:22,028 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:27:22,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:27:22,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:27:22,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:27:22,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:27:22,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:27:22,032 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:27:22,032 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:27:22,033 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:27:22,033 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:27:22,034 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:27:22,034 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:27:22,034 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:27:22,035 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:27:22,035 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:27:22,035 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:27:22,035 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:27:22,036 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:27:22,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:27:22,037 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:27:22,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:27:22,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:27:22,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:27:22,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:27:22,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:27:22,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:27:22,038 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:27:22,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:27:22,039 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:27:22,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:27:22,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:27:22,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:27:22,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:27:22,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:27:22,040 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:27:22,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:27:22,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:27:22,041 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:27:22,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:27:22,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:27:22,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:27:22,042 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_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 [2022-11-26 00:27:22,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:27:22,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:27:22,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:27:22,324 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:27:22,325 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:27:22,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-11-26 00:27:25,348 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:27:25,551 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:27:25,552 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-11-26 00:27:25,559 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/data/b3eff65ca/363b87feebf641079fd1a2d110fce536/FLAG03e520f58 [2022-11-26 00:27:25,574 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/data/b3eff65ca/363b87feebf641079fd1a2d110fce536 [2022-11-26 00:27:25,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:27:25,579 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:27:25,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:27:25,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:27:25,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:27:25,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@256a7a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25, skipping insertion in model container [2022-11-26 00:27:25,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:27:25,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:27:25,763 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_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2022-11-26 00:27:25,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:27:25,795 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:27:25,805 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_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2022-11-26 00:27:25,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:27:25,827 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:27:25,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25 WrapperNode [2022-11-26 00:27:25,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:27:25,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:27:25,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:27:25,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:27:25,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,864 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-26 00:27:25,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:27:25,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:27:25,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:27:25,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:27:25,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,886 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:27:25,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:27:25,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:27:25,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:27:25,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (1/1) ... [2022-11-26 00:27:25,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:27:25,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:25,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:27:25,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:27:25,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:27:25,988 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:27:25,988 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:27:25,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:27:25,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:27:25,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:27:25,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:27:25,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:27:26,062 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:27:26,066 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:27:26,307 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:27:26,332 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:27:26,332 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:27:26,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:27:26 BoogieIcfgContainer [2022-11-26 00:27:26,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:27:26,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:27:26,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:27:26,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:27:26,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:27:25" (1/3) ... [2022-11-26 00:27:26,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8eeac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:27:26, skipping insertion in model container [2022-11-26 00:27:26,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:27:25" (2/3) ... [2022-11-26 00:27:26,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8eeac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:27:26, skipping insertion in model container [2022-11-26 00:27:26,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:27:26" (3/3) ... [2022-11-26 00:27:26,344 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2022-11-26 00:27:26,384 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:27:26,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:27:26,487 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:27:26,493 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;@19479b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:27:26,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:27:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 00:27:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:27:26,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:26,512 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:26,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash 966807424, now seen corresponding path program 1 times [2022-11-26 00:27:26,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:26,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901875895] [2022-11-26 00:27:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:26,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:26,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:27:26,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099937363] [2022-11-26 00:27:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:26,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:26,664 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:26,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:27:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-26 00:27:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:27:26,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:27:26,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:26,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901875895] [2022-11-26 00:27:26,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:27:26,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099937363] [2022-11-26 00:27:26,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099937363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:26,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:26,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:27:26,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935006459] [2022-11-26 00:27:26,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:26,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:27:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:27:26,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:27:26,862 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:27:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:26,909 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2022-11-26 00:27:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:27:26,912 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2022-11-26 00:27:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:26,920 INFO L225 Difference]: With dead ends: 49 [2022-11-26 00:27:26,920 INFO L226 Difference]: Without dead ends: 28 [2022-11-26 00:27:26,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:27:26,927 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:26,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:27:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-26 00:27:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-26 00:27:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-26 00:27:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-11-26 00:27:26,965 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 26 [2022-11-26 00:27:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:26,967 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-11-26 00:27:26,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:27:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-11-26 00:27:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:27:26,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:26,970 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:26,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:27,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:27:27,176 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1643993843, now seen corresponding path program 1 times [2022-11-26 00:27:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:27,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501279614] [2022-11-26 00:27:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:27,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:27,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:27:27,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135726709] [2022-11-26 00:27:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:27,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:27,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:27,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:27,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:27:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:27,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:27:27,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:27:27,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:27:27,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:27,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501279614] [2022-11-26 00:27:27,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:27:27,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135726709] [2022-11-26 00:27:27,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135726709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:27,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795962823] [2022-11-26 00:27:27,568 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:27:27,569 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:27:27,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:27:27,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:27:27,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:27:28,657 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:27:28,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:27:29,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [795962823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:29,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:27:29,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 14 [2022-11-26 00:27:29,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642465065] [2022-11-26 00:27:29,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:29,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:27:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:29,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:27:29,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:27:29,773 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:27:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:30,009 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-26 00:27:30,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:27:30,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-11-26 00:27:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:30,011 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:27:30,011 INFO L226 Difference]: Without dead ends: 30 [2022-11-26 00:27:30,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:27:30,013 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:30,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 48 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:27:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-26 00:27:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-26 00:27:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-26 00:27:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-26 00:27:30,040 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 27 [2022-11-26 00:27:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:30,041 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-26 00:27:30,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:27:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-26 00:27:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:27:30,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:30,042 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:30,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:30,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-26 00:27:30,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:30,249 INFO L85 PathProgramCache]: Analyzing trace with hash -575116102, now seen corresponding path program 1 times [2022-11-26 00:27:30,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:30,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243945990] [2022-11-26 00:27:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:30,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:30,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:27:30,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023205235] [2022-11-26 00:27:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:30,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:30,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:30,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:30,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:27:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:27:30,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:27:30,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:27:30,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:30,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243945990] [2022-11-26 00:27:30,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:27:30,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023205235] [2022-11-26 00:27:30,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023205235] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:30,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:27:30,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-26 00:27:30,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414010066] [2022-11-26 00:27:30,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:30,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:27:30,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:30,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:27:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:27:30,528 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:27:30,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:30,734 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-26 00:27:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:27:30,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 28 [2022-11-26 00:27:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:30,737 INFO L225 Difference]: With dead ends: 36 [2022-11-26 00:27:30,738 INFO L226 Difference]: Without dead ends: 34 [2022-11-26 00:27:30,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:27:30,741 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:30,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:27:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-26 00:27:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-26 00:27:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-26 00:27:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-26 00:27:30,779 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2022-11-26 00:27:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:30,780 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-26 00:27:30,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:27:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-26 00:27:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:27:30,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:30,784 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:30,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:30,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:30,990 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:30,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1810277145, now seen corresponding path program 1 times [2022-11-26 00:27:30,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:30,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186420607] [2022-11-26 00:27:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:30,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:31,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:27:31,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778238244] [2022-11-26 00:27:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:31,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:31,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:31,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:31,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:27:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:31,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:27:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:27:31,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:27:31,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:31,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186420607] [2022-11-26 00:27:31,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:27:31,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778238244] [2022-11-26 00:27:31,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778238244] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:31,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:27:31,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-11-26 00:27:31,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466171486] [2022-11-26 00:27:31,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:31,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:27:31,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:27:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:27:31,489 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:27:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:31,635 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-11-26 00:27:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:27:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2022-11-26 00:27:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:31,638 INFO L225 Difference]: With dead ends: 47 [2022-11-26 00:27:31,638 INFO L226 Difference]: Without dead ends: 45 [2022-11-26 00:27:31,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:27:31,643 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:31,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:27:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-26 00:27:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-11-26 00:27:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 00:27:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2022-11-26 00:27:31,677 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 33 [2022-11-26 00:27:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:31,677 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2022-11-26 00:27:31,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:27:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2022-11-26 00:27:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:27:31,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:31,682 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:31,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:31,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:31,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:31,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1313498982, now seen corresponding path program 1 times [2022-11-26 00:27:31,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:31,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915248472] [2022-11-26 00:27:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:31,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:31,904 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:27:31,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544934901] [2022-11-26 00:27:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:31,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:31,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:31,919 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:31,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:27:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:31,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:27:31,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:27:32,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 00:27:32,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915248472] [2022-11-26 00:27:32,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:27:32,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544934901] [2022-11-26 00:27:32,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544934901] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:32,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:27:32,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2022-11-26 00:27:32,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100266369] [2022-11-26 00:27:32,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:32,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:27:32,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:32,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:27:32,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:27:32,585 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:27:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:32,806 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-11-26 00:27:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:27:32,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 38 [2022-11-26 00:27:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:32,809 INFO L225 Difference]: With dead ends: 51 [2022-11-26 00:27:32,809 INFO L226 Difference]: Without dead ends: 49 [2022-11-26 00:27:32,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:27:32,812 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:32,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:27:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-26 00:27:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-11-26 00:27:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 00:27:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-11-26 00:27:32,844 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 38 [2022-11-26 00:27:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:32,846 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-11-26 00:27:32,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:27:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-11-26 00:27:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:27:32,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:32,848 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:32,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:33,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:33,053 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:33,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1793667961, now seen corresponding path program 1 times [2022-11-26 00:27:33,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:33,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596902169] [2022-11-26 00:27:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:33,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:33,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:27:33,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657099502] [2022-11-26 00:27:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:33,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:33,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:33,074 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:33,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:27:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:33,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-26 00:27:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 00:27:33,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:33,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:33,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596902169] [2022-11-26 00:27:33,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:27:33,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657099502] [2022-11-26 00:27:33,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657099502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:27:33,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [291468061] [2022-11-26 00:27:33,595 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-26 00:27:33,595 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:27:33,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:27:33,596 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:27:33,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:27:34,702 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-26 00:27:34,712 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:27:34,731 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:27:37,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [291468061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:37,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:27:37,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 22 [2022-11-26 00:27:37,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405550571] [2022-11-26 00:27:37,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:37,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:27:37,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:37,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:27:37,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:27:37,239 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-26 00:27:37,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:37,902 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2022-11-26 00:27:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:27:37,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 43 [2022-11-26 00:27:37,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:37,904 INFO L225 Difference]: With dead ends: 73 [2022-11-26 00:27:37,904 INFO L226 Difference]: Without dead ends: 71 [2022-11-26 00:27:37,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:27:37,905 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:37,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:27:37,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-26 00:27:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-26 00:27:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-26 00:27:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-11-26 00:27:37,931 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 43 [2022-11-26 00:27:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:37,932 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-11-26 00:27:37,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-26 00:27:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-11-26 00:27:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 00:27:37,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:37,933 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:37,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:38,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:38,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash 434944611, now seen corresponding path program 1 times [2022-11-26 00:27:38,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:38,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743950420] [2022-11-26 00:27:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:38,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:38,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:27:38,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766525310] [2022-11-26 00:27:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:38,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:38,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:38,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:27:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:38,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:27:38,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-26 00:27:38,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-26 00:27:38,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:38,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743950420] [2022-11-26 00:27:38,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:27:38,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766525310] [2022-11-26 00:27:38,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766525310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:38,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195874599] [2022-11-26 00:27:38,409 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-26 00:27:38,409 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:27:38,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:27:38,410 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:27:38,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:27:50,697 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-26 00:27:50,705 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:27:50,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:27:54,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2208#(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 00:27:54,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:27:54,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:27:54,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-11-26 00:27:54,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762067621] [2022-11-26 00:27:54,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:27:54,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:27:54,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:27:54,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:27:54,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:27:54,924 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:27:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:55,233 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2022-11-26 00:27:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:27:55,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2022-11-26 00:27:55,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:55,236 INFO L225 Difference]: With dead ends: 111 [2022-11-26 00:27:55,236 INFO L226 Difference]: Without dead ends: 103 [2022-11-26 00:27:55,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:27:55,237 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 34 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:55,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 177 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:27:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-26 00:27:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2022-11-26 00:27:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-26 00:27:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2022-11-26 00:27:55,279 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 52 [2022-11-26 00:27:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:55,280 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2022-11-26 00:27:55,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 00:27:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2022-11-26 00:27:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-26 00:27:55,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:55,284 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:55,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-26 00:27:55,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:27:55,492 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:27:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash -243308457, now seen corresponding path program 1 times [2022-11-26 00:27:55,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:27:55,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146961856] [2022-11-26 00:27:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:55,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:27:55,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:27:55,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058443929] [2022-11-26 00:27:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:55,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:55,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:55,506 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:55,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:27:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:55,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:27:55,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-26 00:27:55,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 00:27:55,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:27:55,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146961856] [2022-11-26 00:27:55,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:27:55,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058443929] [2022-11-26 00:27:55,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058443929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:55,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627555825] [2022-11-26 00:27:55,844 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 00:27:55,844 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:27:55,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:27:55,845 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:27:55,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:28:06,137 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-26 00:28:06,145 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:28:06,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:28:11,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [627555825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:28:11,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:28:11,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [9, 7] total 28 [2022-11-26 00:28:11,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145033413] [2022-11-26 00:28:11,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:28:11,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:28:11,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:11,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:28:11,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:28:11,148 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-26 00:28:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:12,284 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2022-11-26 00:28:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:28:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 58 [2022-11-26 00:28:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:12,286 INFO L225 Difference]: With dead ends: 113 [2022-11-26 00:28:12,286 INFO L226 Difference]: Without dead ends: 111 [2022-11-26 00:28:12,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:28:12,288 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:12,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 58 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:28:12,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-26 00:28:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-26 00:28:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-26 00:28:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2022-11-26 00:28:12,331 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 58 [2022-11-26 00:28:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:12,331 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2022-11-26 00:28:12,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-26 00:28:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2022-11-26 00:28:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-26 00:28:12,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:12,333 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:12,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:12,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:12,536 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1984692712, now seen corresponding path program 1 times [2022-11-26 00:28:12,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:12,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260270353] [2022-11-26 00:28:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:12,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:12,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:28:12,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429214872] [2022-11-26 00:28:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:12,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:12,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:12,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:12,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:28:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:12,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:28:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-26 00:28:12,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-26 00:28:12,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:12,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260270353] [2022-11-26 00:28:12,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:28:12,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429214872] [2022-11-26 00:28:12,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429214872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:12,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [508803769] [2022-11-26 00:28:12,851 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 00:28:12,851 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:12,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:28:12,852 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:28:12,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:28:17,605 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2022-11-26 00:28:17,651 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:28:17,663 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:28:22,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3657#(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 00:28:22,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:28:22,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:28:22,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-26 00:28:22,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977020109] [2022-11-26 00:28:22,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:22,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:28:22,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:28:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:28:22,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:28:22,701 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-26 00:28:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:23,080 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2022-11-26 00:28:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:28:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 65 [2022-11-26 00:28:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:23,083 INFO L225 Difference]: With dead ends: 122 [2022-11-26 00:28:23,084 INFO L226 Difference]: Without dead ends: 120 [2022-11-26 00:28:23,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 157 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:28:23,085 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:23,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 103 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:28:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-26 00:28:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-26 00:28:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-26 00:28:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-11-26 00:28:23,136 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 65 [2022-11-26 00:28:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:23,136 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-11-26 00:28:23,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-26 00:28:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-11-26 00:28:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:28:23,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:23,138 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:23,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:23,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:23,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:23,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2003369438, now seen corresponding path program 1 times [2022-11-26 00:28:23,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:28:23,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893862622] [2022-11-26 00:28:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:23,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:28:23,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:28:23,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675386959] [2022-11-26 00:28:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:23,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:23,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:23,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:23,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:28:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:23,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-26 00:28:23,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-26 00:28:23,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-26 00:28:24,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:28:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893862622] [2022-11-26 00:28:24,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:28:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675386959] [2022-11-26 00:28:24,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675386959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10062479] [2022-11-26 00:28:24,902 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-26 00:28:24,902 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:28:24,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:28:24,903 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:28:24,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:28:28,495 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2022-11-26 00:28:28,543 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:28:28,556 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:28:49,037 WARN L233 SmtUtils]: Spent 16.23s on a formula simplification. DAG size of input: 180 DAG size of output: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:00,186 WARN L233 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:20,041 WARN L233 SmtUtils]: Spent 19.24s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:29,930 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 178 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:29,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4509#(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 00:29:29,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:29:29,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:29:29,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-11-26 00:29:29,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381055856] [2022-11-26 00:29:29,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:29:29,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:29:29,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:29,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:29:29,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:29:29,975 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-26 00:29:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:41,029 INFO L93 Difference]: Finished difference Result 199 states and 279 transitions. [2022-11-26 00:29:41,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:29:41,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 74 [2022-11-26 00:29:41,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:41,032 INFO L225 Difference]: With dead ends: 199 [2022-11-26 00:29:41,032 INFO L226 Difference]: Without dead ends: 197 [2022-11-26 00:29:41,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 172 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 67.6s TimeCoverageRelationStatistics Valid=440, Invalid=3100, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:29:41,035 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 96 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:41,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 314 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-26 00:29:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-26 00:29:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2022-11-26 00:29:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 101 states have internal predecessors, (121), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-26 00:29:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 266 transitions. [2022-11-26 00:29:41,123 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 266 transitions. Word has length 74 [2022-11-26 00:29:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:41,124 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 266 transitions. [2022-11-26 00:29:41,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-26 00:29:41,124 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 266 transitions. [2022-11-26 00:29:41,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 00:29:41,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:41,125 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:41,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:41,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:41,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -134461569, now seen corresponding path program 1 times [2022-11-26 00:29:41,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:41,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696250806] [2022-11-26 00:29:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:41,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:29:41,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279679067] [2022-11-26 00:29:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:41,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:41,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:41,343 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:41,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:29:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:41,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:29:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 16 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-26 00:29:41,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-26 00:29:42,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:42,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696250806] [2022-11-26 00:29:42,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:29:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279679067] [2022-11-26 00:29:42,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279679067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [702091880] [2022-11-26 00:29:42,285 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-26 00:29:42,285 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:29:42,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:29:42,286 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:29:42,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:29:45,522 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-26 00:29:45,526 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:29:45,539 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:30:13,351 WARN L233 SmtUtils]: Spent 22.90s on a formula simplification. DAG size of input: 178 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:30:29,773 WARN L233 SmtUtils]: Spent 13.96s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:30:48,412 WARN L233 SmtUtils]: Spent 17.24s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:31:05,954 WARN L233 SmtUtils]: Spent 15.07s on a formula simplification. DAG size of input: 176 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:31:06,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5668#(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 00:31:06,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:31:06,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:31:06,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-11-26 00:31:06,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649702737] [2022-11-26 00:31:06,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:06,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:31:06,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:06,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:31:06,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1431, Unknown=1, NotChecked=0, Total=1640 [2022-11-26 00:31:06,765 INFO L87 Difference]: Start difference. First operand 187 states and 266 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-26 00:31:13,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:13,927 INFO L93 Difference]: Finished difference Result 231 states and 326 transitions. [2022-11-26 00:31:13,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:31:13,928 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 79 [2022-11-26 00:31:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:13,930 INFO L225 Difference]: With dead ends: 231 [2022-11-26 00:31:13,931 INFO L226 Difference]: Without dead ends: 225 [2022-11-26 00:31:13,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 85.5s TimeCoverageRelationStatistics Valid=344, Invalid=2411, Unknown=1, NotChecked=0, Total=2756 [2022-11-26 00:31:13,932 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:13,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 168 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-26 00:31:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-26 00:31:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 197. [2022-11-26 00:31:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 109 states have internal predecessors, (127), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-26 00:31:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 268 transitions. [2022-11-26 00:31:14,017 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 268 transitions. Word has length 79 [2022-11-26 00:31:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:14,018 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 268 transitions. [2022-11-26 00:31:14,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-26 00:31:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 268 transitions. [2022-11-26 00:31:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-26 00:31:14,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:14,019 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:14,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:14,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:31:14,226 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:14,226 INFO L85 PathProgramCache]: Analyzing trace with hash 145896886, now seen corresponding path program 1 times [2022-11-26 00:31:14,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:14,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379081149] [2022-11-26 00:31:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:14,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:14,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:31:14,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266841757] [2022-11-26 00:31:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:14,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:14,238 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:14,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:31:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:14,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-26 00:31:14,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 53 proven. 22 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-11-26 00:31:15,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-26 00:31:17,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:17,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379081149] [2022-11-26 00:31:17,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:31:17,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266841757] [2022-11-26 00:31:17,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266841757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:17,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415308618] [2022-11-26 00:31:17,432 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 00:31:17,432 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:17,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:31:17,433 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:31:17,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:31:20,125 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2022-11-26 00:31:20,165 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:31:20,177 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:32:01,196 WARN L233 SmtUtils]: Spent 29.29s on a formula simplification. DAG size of input: 178 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:32:22,460 WARN L233 SmtUtils]: Spent 8.90s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:32:31,982 WARN L233 SmtUtils]: Spent 8.16s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:32:32,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6951#(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 00:32:32,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:32:32,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:32:32,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2022-11-26 00:32:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559393876] [2022-11-26 00:32:32,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:32:32,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:32:32,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:32:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:32:32,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1567, Unknown=2, NotChecked=0, Total=1806 [2022-11-26 00:32:32,201 INFO L87 Difference]: Start difference. First operand 197 states and 268 transitions. Second operand has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-26 00:32:41,082 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:32:52,511 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 00:32:56,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:33:05,139 WARN L539 Checker$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 00:33:16,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:33:18,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:33:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:20,452 INFO L93 Difference]: Finished difference Result 274 states and 382 transitions. [2022-11-26 00:33:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:33:20,453 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 90 [2022-11-26 00:33:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:20,454 INFO L225 Difference]: With dead ends: 274 [2022-11-26 00:33:20,455 INFO L226 Difference]: Without dead ends: 272 [2022-11-26 00:33:20,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 213 SyntacticMatches, 14 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 100.4s TimeCoverageRelationStatistics Valid=523, Invalid=3015, Unknown=2, NotChecked=0, Total=3540 [2022-11-26 00:33:20,458 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 102 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 173 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:20,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 132 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 915 Invalid, 4 Unknown, 0 Unchecked, 20.6s Time] [2022-11-26 00:33:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-26 00:33:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-11-26 00:33:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 139 states have (on average 1.1726618705035972) internal successors, (163), 142 states have internal predecessors, (163), 95 states have call successors, (95), 19 states have call predecessors, (95), 19 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-26 00:33:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 352 transitions. [2022-11-26 00:33:20,628 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 352 transitions. Word has length 90 [2022-11-26 00:33:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:20,629 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 352 transitions. [2022-11-26 00:33:20,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-26 00:33:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 352 transitions. [2022-11-26 00:33:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-26 00:33:20,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:20,631 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:20,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:20,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:33:20,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2106799636, now seen corresponding path program 2 times [2022-11-26 00:33:20,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:20,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679650687] [2022-11-26 00:33:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:20,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:20,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:33:20,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078617109] [2022-11-26 00:33:20,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:33:20,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:20,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:20,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:20,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:33:20,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:33:20,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:33:20,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:33:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-26 00:33:20,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:33:20,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:20,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679650687] [2022-11-26 00:33:20,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:33:20,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078617109] [2022-11-26 00:33:20,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078617109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:33:20,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:33:20,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:33:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156029848] [2022-11-26 00:33:20,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:33:20,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:33:20,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:33:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:33:20,952 INFO L87 Difference]: Start difference. First operand 254 states and 352 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-26 00:33:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:21,200 INFO L93 Difference]: Finished difference Result 353 states and 485 transitions. [2022-11-26 00:33:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:33:21,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 99 [2022-11-26 00:33:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:21,202 INFO L225 Difference]: With dead ends: 353 [2022-11-26 00:33:21,203 INFO L226 Difference]: Without dead ends: 229 [2022-11-26 00:33:21,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:33:21,205 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:21,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 128 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:33:21,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-26 00:33:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 197. [2022-11-26 00:33:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 113 states have internal predecessors, (123), 67 states have call successors, (67), 19 states have call predecessors, (67), 19 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-26 00:33:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 256 transitions. [2022-11-26 00:33:21,326 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 256 transitions. Word has length 99 [2022-11-26 00:33:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:21,327 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 256 transitions. [2022-11-26 00:33:21,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-26 00:33:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 256 transitions. [2022-11-26 00:33:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:33:21,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:21,329 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:21,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:21,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:21,533 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:21,534 INFO L85 PathProgramCache]: Analyzing trace with hash -425141716, now seen corresponding path program 2 times [2022-11-26 00:33:21,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:21,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601349422] [2022-11-26 00:33:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:21,543 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:33:21,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430347906] [2022-11-26 00:33:21,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:33:21,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:21,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:21,545 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:21,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:33:21,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:33:21,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:33:21,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-26 00:33:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-11-26 00:33:22,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-11-26 00:33:22,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:22,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601349422] [2022-11-26 00:33:22,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:33:22,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430347906] [2022-11-26 00:33:22,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430347906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:22,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180410114] [2022-11-26 00:33:22,492 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 00:33:22,492 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:33:22,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:33:22,493 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:33:22,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:33:24,377 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2022-11-26 00:33:24,431 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:33:24,445 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:48,054 WARN L233 SmtUtils]: Spent 18.35s on a formula simplification. DAG size of input: 178 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:34:00,984 WARN L233 SmtUtils]: Spent 6.52s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:34:21,439 WARN L233 SmtUtils]: Spent 18.51s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:34:21,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9660#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:34:21,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:34:21,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:34:21,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-11-26 00:34:21,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738287132] [2022-11-26 00:34:21,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:21,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:34:21,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:21,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:34:21,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:34:21,566 INFO L87 Difference]: Start difference. First operand 197 states and 256 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-26 00:34:22,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-26 00:34:27,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:27,790 INFO L93 Difference]: Finished difference Result 228 states and 300 transitions. [2022-11-26 00:34:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:34:27,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 107 [2022-11-26 00:34:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:27,793 INFO L225 Difference]: With dead ends: 228 [2022-11-26 00:34:27,793 INFO L226 Difference]: Without dead ends: 226 [2022-11-26 00:34:27,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 268 SyntacticMatches, 16 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 59.6s TimeCoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:34:27,795 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:27,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 177 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-26 00:34:27,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-26 00:34:28,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 201. [2022-11-26 00:34:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 116 states have internal predecessors, (126), 67 states have call successors, (67), 20 states have call predecessors, (67), 20 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-26 00:34:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2022-11-26 00:34:28,008 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 107 [2022-11-26 00:34:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:28,009 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2022-11-26 00:34:28,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-26 00:34:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2022-11-26 00:34:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-26 00:34:28,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:28,011 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:28,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:28,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:28,218 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1538893617, now seen corresponding path program 3 times [2022-11-26 00:34:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:28,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284509273] [2022-11-26 00:34:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:28,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:34:28,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633612976] [2022-11-26 00:34:28,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:34:28,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:28,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:28,239 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:28,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:34:28,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:34:28,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:28,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-26 00:34:28,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 39 proven. 89 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2022-11-26 00:34:29,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 37 proven. 83 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-11-26 00:34:34,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:34,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284509273] [2022-11-26 00:34:34,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:34:34,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633612976] [2022-11-26 00:34:34,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633612976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:34,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [81128197] [2022-11-26 00:34:34,585 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-26 00:34:34,585 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:34:34,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:34:34,586 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:34:34,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:34:36,813 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2022-11-26 00:34:36,860 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:34:36,874 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:35:10,295 WARN L233 SmtUtils]: Spent 27.61s on a formula simplification. DAG size of input: 178 DAG size of output: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:35:26,382 WARN L233 SmtUtils]: Spent 7.59s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:35:44,055 WARN L233 SmtUtils]: Spent 16.41s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:35:57,419 WARN L233 SmtUtils]: Spent 11.29s on a formula simplification. DAG size of input: 176 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:35:57,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11114#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:35:57,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:35:57,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:35:57,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2022-11-26 00:35:57,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097462595] [2022-11-26 00:35:57,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:35:57,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:35:57,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:35:57,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:35:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2324, Unknown=1, NotChecked=0, Total=2652 [2022-11-26 00:35:57,479 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 28 states have internal predecessors, (51), 16 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) [2022-11-26 00:36:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:36:32,837 INFO L93 Difference]: Finished difference Result 344 states and 476 transitions. [2022-11-26 00:36:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-26 00:36:32,837 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 28 states have internal predecessors, (51), 16 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) Word has length 121 [2022-11-26 00:36:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:36:32,840 INFO L225 Difference]: With dead ends: 344 [2022-11-26 00:36:32,840 INFO L226 Difference]: Without dead ends: 336 [2022-11-26 00:36:32,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 291 SyntacticMatches, 20 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3560 ImplicationChecksByTransitivity, 103.3s TimeCoverageRelationStatistics Valid=1145, Invalid=7226, Unknown=1, NotChecked=0, Total=8372 [2022-11-26 00:36:32,843 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 218 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 2664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:36:32,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 293 Invalid, 2664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 2132 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2022-11-26 00:36:32,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-26 00:36:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 294. [2022-11-26 00:36:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 159 states have (on average 1.1320754716981132) internal successors, (180), 162 states have internal predecessors, (180), 111 states have call successors, (111), 23 states have call predecessors, (111), 23 states have return successors, (110), 108 states have call predecessors, (110), 110 states have call successors, (110) [2022-11-26 00:36:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 401 transitions. [2022-11-26 00:36:33,119 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 401 transitions. Word has length 121 [2022-11-26 00:36:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:36:33,120 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 401 transitions. [2022-11-26 00:36:33,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 28 states have internal predecessors, (51), 16 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) [2022-11-26 00:36:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 401 transitions. [2022-11-26 00:36:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-26 00:36:33,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:36:33,123 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:36:33,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:36:33,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:36:33,329 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:36:33,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:36:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1914774331, now seen corresponding path program 3 times [2022-11-26 00:36:33,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:36:33,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009823561] [2022-11-26 00:36:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:36:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:36:33,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:36:33,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292179486] [2022-11-26 00:36:33,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:36:33,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:36:33,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:36:33,344 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:36:33,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ea3908a-e6b6-4d9c-a68f-87df5c8b9c0a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:36:33,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:36:33,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:36:33,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-26 00:36:33,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:36:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 140 proven. 71 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2022-11-26 00:36:36,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 138 proven. 58 refuted. 7 times theorem prover too weak. 612 trivial. 0 not checked. [2022-11-26 00:37:12,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:37:12,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009823561] [2022-11-26 00:37:12,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:37:12,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292179486] [2022-11-26 00:37:12,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292179486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:12,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339735504] [2022-11-26 00:37:12,818 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 00:37:12,819 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:37:12,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:37:12,819 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:37:12,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:37:16,895 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-26 00:37:16,899 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-26 00:37:16,912 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:37:56,215 WARN L233 SmtUtils]: Spent 11.62s on a formula simplification. DAG size of input: 83 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:38:22,494 WARN L233 SmtUtils]: Spent 17.48s on a formula simplification. DAG size of input: 85 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:38:28,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13077#(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 00:38:28,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:38:28,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:38:28,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2022-11-26 00:38:28,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119681342] [2022-11-26 00:38:28,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:28,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-26 00:38:28,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:28,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-26 00:38:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2284, Unknown=9, NotChecked=0, Total=2652 [2022-11-26 00:38:28,192 INFO L87 Difference]: Start difference. First operand 294 states and 401 transitions. Second operand has 33 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 18 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 18 states have call predecessors, (49), 17 states have call successors, (49) [2022-11-26 00:38:32,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:38:50,083 WARN L233 SmtUtils]: Spent 14.73s on a formula simplification. DAG size of input: 146 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:39:19,853 WARN L233 SmtUtils]: Spent 25.28s on a formula simplification that was a NOOP. DAG size: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:39:23,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:39:36,635 WARN L233 SmtUtils]: Spent 12.23s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:39:38,867 WARN L539 Checker$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 00:39:49,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:39:53,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:39:55,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:02,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:24,808 WARN L233 SmtUtils]: Spent 21.93s on a formula simplification. DAG size of input: 145 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:40:48,114 WARN L233 SmtUtils]: Spent 22.95s on a formula simplification that was a NOOP. DAG size: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:40:50,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:40:52,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:05,667 WARN L233 SmtUtils]: Spent 10.25s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:41:19,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:24,118 WARN L539 Checker$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 00:41:26,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:28,164 WARN L539 Checker$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 00:41:30,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:43,616 WARN L233 SmtUtils]: Spent 13.28s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:41:52,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:54,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:56,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:41:58,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 00:42:01,641 WARN L539 Checker$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 00:42:05,563 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 00:42:25,946 WARN L233 SmtUtils]: Spent 19.08s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)