./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta --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 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 --- 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-dbf71c6-m [2022-10-17 17:10:56,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:10:56,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:10:57,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:10:57,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:10:57,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:10:57,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:10:57,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:10:57,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:10:57,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:10:57,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:10:57,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:10:57,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:10:57,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:10:57,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:10:57,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:10:57,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:10:57,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:10:57,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:10:57,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:10:57,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:10:57,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:10:57,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:10:57,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:10:57,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:10:57,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:10:57,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:10:57,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:10:57,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:10:57,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:10:57,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:10:57,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:10:57,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:10:57,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:10:57,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:10:57,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:10:57,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:10:57,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:10:57,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:10:57,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:10:57,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:10:57,071 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:10:57,112 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:10:57,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:10:57,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:10:57,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:10:57,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:10:57,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:10:57,115 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:10:57,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:10:57,115 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:10:57,115 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:10:57,116 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:10:57,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:10:57,116 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:10:57,116 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:10:57,116 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:10:57,117 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:10:57,117 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:10:57,117 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:10:57,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:10:57,118 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:10:57,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:10:57,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:10:57,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:10:57,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:10:57,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:10:57,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:10:57,120 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:10:57,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:10:57,120 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:10:57,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:10:57,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:10:57,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:10:57,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:10:57,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:10:57,122 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:10:57,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:10:57,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:10:57,122 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:10:57,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:10:57,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:10:57,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:10:57,123 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_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 [2022-10-17 17:10:57,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:10:57,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:10:57,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:10:57,454 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:10:57,454 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:10:57,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2022-10-17 17:10:57,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/data/bb60d6419/61ba16d88c05473bac56c6e560890a27/FLAG11991c78f [2022-10-17 17:10:58,199 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:10:58,201 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2022-10-17 17:10:58,209 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/data/bb60d6419/61ba16d88c05473bac56c6e560890a27/FLAG11991c78f [2022-10-17 17:10:58,524 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/data/bb60d6419/61ba16d88c05473bac56c6e560890a27 [2022-10-17 17:10:58,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:10:58,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:10:58,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:10:58,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:10:58,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:10:58,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb9e3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58, skipping insertion in model container [2022-10-17 17:10:58,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:10:58,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:10:58,727 WARN L230 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_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c[537,550] [2022-10-17 17:10:58,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:10:58,752 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:10:58,765 WARN L230 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_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c[537,550] [2022-10-17 17:10:58,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:10:58,784 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:10:58,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58 WrapperNode [2022-10-17 17:10:58,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:10:58,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:10:58,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:10:58,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:10:58,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,817 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-10-17 17:10:58,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:10:58,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:10:58,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:10:58,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:10:58,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,848 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:10:58,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:10:58,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:10:58,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:10:58,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (1/1) ... [2022-10-17 17:10:58,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:10:58,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:10:58,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:10:58,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:10:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:10:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:10:58,934 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:10:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:10:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:10:58,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:10:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:10:58,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:10:58,997 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:10:58,999 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:10:59,214 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:10:59,303 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:10:59,303 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:10:59,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:10:59 BoogieIcfgContainer [2022-10-17 17:10:59,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:10:59,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:10:59,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:10:59,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:10:59,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:10:58" (1/3) ... [2022-10-17 17:10:59,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d652aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:10:59, skipping insertion in model container [2022-10-17 17:10:59,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:10:58" (2/3) ... [2022-10-17 17:10:59,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d652aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:10:59, skipping insertion in model container [2022-10-17 17:10:59,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:10:59" (3/3) ... [2022-10-17 17:10:59,317 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound100.c [2022-10-17 17:10:59,341 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:10:59,341 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:10:59,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:10:59,428 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;@149d64b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:10:59,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:10:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 17:10:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:10:59,441 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:10:59,442 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:10:59,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:10:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:10:59,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1772938727, now seen corresponding path program 1 times [2022-10-17 17:10:59,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:10:59,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601280848] [2022-10-17 17:10:59,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:10:59,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:10:59,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:10:59,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525981494] [2022-10-17 17:10:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:10:59,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:10:59,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:10:59,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:10:59,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:10:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:10:59,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 17:10:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:10:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:10:59,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:10:59,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:10:59,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601280848] [2022-10-17 17:10:59,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:10:59,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525981494] [2022-10-17 17:10:59,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525981494] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:10:59,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:10:59,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:10:59,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151488658] [2022-10-17 17:10:59,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:10:59,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:10:59,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:10:59,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:10:59,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:10:59,976 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:11:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:11:00,124 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-10-17 17:11:00,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:11:00,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-10-17 17:11:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:11:00,143 INFO L225 Difference]: With dead ends: 42 [2022-10-17 17:11:00,143 INFO L226 Difference]: Without dead ends: 26 [2022-10-17 17:11:00,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:11:00,151 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:11:00,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:11:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-10-17 17:11:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-10-17 17:11:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 17:11:00,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-10-17 17:11:00,201 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-10-17 17:11:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:11:00,204 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-10-17 17:11:00,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:11:00,205 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-10-17 17:11:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:11:00,208 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:11:00,208 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:11:00,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:11:00,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 17:11:00,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:11:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:11:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1457957052, now seen corresponding path program 1 times [2022-10-17 17:11:00,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:11:00,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375249065] [2022-10-17 17:11:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:11:00,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:11:00,465 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:11:00,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435873444] [2022-10-17 17:11:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:11:00,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:11:00,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:11:00,472 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:11:00,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:11:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:11:00,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:11:00,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:11:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:11:00,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:11:00,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:11:00,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375249065] [2022-10-17 17:11:00,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:11:00,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435873444] [2022-10-17 17:11:00,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435873444] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:11:00,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:11:00,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:11:00,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117705728] [2022-10-17 17:11:00,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:11:00,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:11:00,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:11:00,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:11:00,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:11:00,605 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:11:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:11:00,745 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-10-17 17:11:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:11:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2022-10-17 17:11:00,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:11:00,748 INFO L225 Difference]: With dead ends: 32 [2022-10-17 17:11:00,748 INFO L226 Difference]: Without dead ends: 25 [2022-10-17 17:11:00,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:11:00,752 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:11:00,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:11:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-17 17:11:00,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-10-17 17:11:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 17:11:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-10-17 17:11:00,765 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2022-10-17 17:11:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:11:00,766 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-10-17 17:11:00,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:11:00,767 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-10-17 17:11:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:11:00,768 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:11:00,768 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:11:00,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:11:00,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:11:00,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:11:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:11:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash -489488164, now seen corresponding path program 1 times [2022-10-17 17:11:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:11:00,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100138480] [2022-10-17 17:11:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:11:00,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:11:01,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:11:01,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452664234] [2022-10-17 17:11:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:11:01,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:11:01,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:11:01,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:11:01,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:11:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:11:01,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-17 17:11:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:11:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:11:06,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:11:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:11:13,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:11:13,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100138480] [2022-10-17 17:11:13,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:11:13,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452664234] [2022-10-17 17:11:13,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452664234] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:11:13,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546182887] [2022-10-17 17:11:13,453 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-10-17 17:11:13,453 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:11:13,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:11:13,463 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:11:13,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:11:14,387 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-10-17 17:11:14,630 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-10-17 17:11:14,632 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:11:18,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '482#(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 [2022-10-17 17:11:18,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:11:18,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:11:18,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-10-17 17:11:18,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140985308] [2022-10-17 17:11:18,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:11:18,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 17:11:18,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:11:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 17:11:18,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-10-17 17:11:18,132 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:11:19,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 17:11:21,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 17:11:31,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 17:11:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:11:31,888 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-10-17 17:11:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 17:11:31,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 24 [2022-10-17 17:11:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:11:31,891 INFO L225 Difference]: With dead ends: 40 [2022-10-17 17:11:31,891 INFO L226 Difference]: Without dead ends: 38 [2022-10-17 17:11:31,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=149, Invalid=905, Unknown=2, NotChecked=0, Total=1056 [2022-10-17 17:11:31,894 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:11:31,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 76 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-10-17 17:11:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-17 17:11:31,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-10-17 17:11:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 17:11:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-10-17 17:11:31,910 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2022-10-17 17:11:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:11:31,910 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-10-17 17:11:31,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-10-17 17:11:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-10-17 17:11:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 17:11:31,912 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:11:31,913 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:11:31,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:11:32,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:11:32,114 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:11:32,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:11:32,114 INFO L85 PathProgramCache]: Analyzing trace with hash 750858559, now seen corresponding path program 1 times [2022-10-17 17:11:32,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:11:32,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500113301] [2022-10-17 17:11:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:11:32,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:11:32,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:11:32,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209995988] [2022-10-17 17:11:32,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:11:32,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:11:32,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:11:32,142 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:11:32,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:11:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:11:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 17:11:32,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:11:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:11:32,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:11:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 17:11:32,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:11:32,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500113301] [2022-10-17 17:11:32,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:11:32,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209995988] [2022-10-17 17:11:32,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209995988] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:11:32,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093939890] [2022-10-17 17:11:32,445 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-10-17 17:11:32,446 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:11:32,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:11:32,446 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:11:32,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:11:33,255 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-10-17 17:11:33,260 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-10-17 17:11:33,262 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:11:36,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '801#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:11:36,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:11:36,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:11:36,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-10-17 17:11:36,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185271694] [2022-10-17 17:11:36,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 17:11:36,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 17:11:36,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:11:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 17:11:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=414, Unknown=1, NotChecked=0, Total=506 [2022-10-17 17:11:36,303 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-10-17 17:11:38,327 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 [] [2022-10-17 17:11:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:11:38,406 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-10-17 17:11:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:11:38,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 30 [2022-10-17 17:11:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:11:38,408 INFO L225 Difference]: With dead ends: 43 [2022-10-17 17:11:38,408 INFO L226 Difference]: Without dead ends: 36 [2022-10-17 17:11:38,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=105, Invalid=494, Unknown=1, NotChecked=0, Total=600 [2022-10-17 17:11:38,410 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:11:38,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 55 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-10-17 17:11:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-10-17 17:11:38,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-10-17 17:11:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 17:11:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-10-17 17:11:38,435 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2022-10-17 17:11:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:11:38,435 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-10-17 17:11:38,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-10-17 17:11:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-10-17 17:11:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 17:11:38,440 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:11:38,440 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:11:38,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:11:38,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:11:38,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:11:38,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:11:38,648 INFO L85 PathProgramCache]: Analyzing trace with hash -997597351, now seen corresponding path program 2 times [2022-10-17 17:11:38,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:11:38,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980155398] [2022-10-17 17:11:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:11:38,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:11:38,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:11:38,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884778278] [2022-10-17 17:11:38,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:11:38,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:11:38,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:11:38,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:11:38,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e82f6dc-e1f0-41b8-8478-e217c6dff8b5/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:11:38,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-10-17 17:11:38,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:11:38,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2022-10-17 17:11:38,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:11:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 17:11:39,504 INFO L328 TraceCheckSpWp]: Computing backward predicates...