./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/max-2-u.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_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/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_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/max-2-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/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_ed7f9809-e5bf-404b-939b-1e18624de5e0/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 d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f --- 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 00:50:34,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:50:34,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:50:34,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:50:34,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:50:34,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:50:34,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:50:34,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:50:34,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:50:34,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:50:34,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:50:34,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:50:34,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:50:34,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:50:34,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:50:34,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:50:34,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:50:34,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:50:34,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:50:34,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:50:34,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:50:34,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:50:34,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:50:34,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:50:34,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:50:34,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:50:34,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:50:34,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:50:34,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:50:34,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:50:34,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:50:34,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:50:34,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:50:34,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:50:34,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:50:34,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:50:34,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:50:34,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:50:34,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:50:34,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:50:34,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:50:34,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:50:34,150 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:50:34,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:50:34,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:50:34,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:50:34,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:50:34,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:50:34,158 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:50:34,158 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:50:34,158 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:50:34,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:50:34,160 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:50:34,160 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:50:34,160 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:50:34,160 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:50:34,161 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:50:34,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:50:34,161 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:50:34,161 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:50:34,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:50:34,163 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:50:34,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:50:34,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:50:34,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:50:34,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:50:34,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:50:34,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:50:34,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:50:34,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:50:34,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:50:34,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:50:34,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:50:34,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:50:34,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:50:34,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:50:34,167 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:50:34,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:50:34,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:50:34,168 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:50:34,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:50:34,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:50:34,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:50:34,169 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_ed7f9809-e5bf-404b-939b-1e18624de5e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f [2022-11-26 00:50:34,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:50:34,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:50:34,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:50:34,440 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:50:34,440 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:50:34,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-multidimensional/max-2-u.c [2022-11-26 00:50:37,441 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:50:37,666 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:50:37,667 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/sv-benchmarks/c/array-multidimensional/max-2-u.c [2022-11-26 00:50:37,674 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/data/532cb4b1a/81e84827b04c47a2a6ec1c676503bf83/FLAGb7fd3db16 [2022-11-26 00:50:37,693 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/data/532cb4b1a/81e84827b04c47a2a6ec1c676503bf83 [2022-11-26 00:50:37,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:50:37,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:50:37,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:50:37,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:50:37,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:50:37,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:50:37" (1/1) ... [2022-11-26 00:50:37,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258c0093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:37, skipping insertion in model container [2022-11-26 00:50:37,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:50:37" (1/1) ... [2022-11-26 00:50:37,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:50:37,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:50:37,922 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_ed7f9809-e5bf-404b-939b-1e18624de5e0/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2022-11-26 00:50:37,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:50:37,961 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:50:37,975 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_ed7f9809-e5bf-404b-939b-1e18624de5e0/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2022-11-26 00:50:37,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:50:38,010 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:50:38,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38 WrapperNode [2022-11-26 00:50:38,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:50:38,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:50:38,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:50:38,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:50:38,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,055 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-26 00:50:38,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:50:38,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:50:38,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:50:38,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:50:38,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,088 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:50:38,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:50:38,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:50:38,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:50:38,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (1/1) ... [2022-11-26 00:50:38,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:50:38,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:38,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:50:38,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:50:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:50:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:50:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:50:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:50:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:50:38,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:50:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:50:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:50:38,257 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:50:38,260 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:50:38,439 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:50:38,505 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:50:38,506 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-26 00:50:38,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:50:38 BoogieIcfgContainer [2022-11-26 00:50:38,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:50:38,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:50:38,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:50:38,515 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:50:38,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:50:37" (1/3) ... [2022-11-26 00:50:38,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c276c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:50:38, skipping insertion in model container [2022-11-26 00:50:38,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:50:38" (2/3) ... [2022-11-26 00:50:38,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c276c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:50:38, skipping insertion in model container [2022-11-26 00:50:38,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:50:38" (3/3) ... [2022-11-26 00:50:38,518 INFO L112 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2022-11-26 00:50:38,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:50:38,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:50:38,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:50:38,605 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;@37e600fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:50:38,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:50:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:50:38,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:38,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:38,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:50:38,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1954460599, now seen corresponding path program 1 times [2022-11-26 00:50:38,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:38,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391783547] [2022-11-26 00:50:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:38,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:38,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:50:38,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315909620] [2022-11-26 00:50:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:38,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:38,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:38,725 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:38,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:50:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:38,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:50:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:50:38,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:50:38,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:38,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391783547] [2022-11-26 00:50:38,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:50:38,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315909620] [2022-11-26 00:50:38,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315909620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:38,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:50:38,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:50:38,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555963934] [2022-11-26 00:50:38,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:38,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:50:38,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:38,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:50:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:50:38,988 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:39,068 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-26 00:50:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:50:39,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:50:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:39,079 INFO L225 Difference]: With dead ends: 23 [2022-11-26 00:50:39,080 INFO L226 Difference]: Without dead ends: 13 [2022-11-26 00:50:39,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:50:39,090 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:39,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:50:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-26 00:50:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-26 00:50:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-26 00:50:39,156 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2022-11-26 00:50:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:39,156 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-26 00:50:39,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-26 00:50:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:50:39,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:39,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:39,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:39,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:50:39,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:50:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1712892417, now seen corresponding path program 1 times [2022-11-26 00:50:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:39,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989077141] [2022-11-26 00:50:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:39,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:50:39,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434020523] [2022-11-26 00:50:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:39,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:39,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:39,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:39,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:50:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:39,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:50:39,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:50:39,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:50:39,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989077141] [2022-11-26 00:50:39,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:50:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434020523] [2022-11-26 00:50:39,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434020523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:39,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:50:39,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:50:39,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878365513] [2022-11-26 00:50:39,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:39,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:50:39,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:39,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:50:39,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:50:39,502 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:39,565 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-26 00:50:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:50:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:50:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:39,566 INFO L225 Difference]: With dead ends: 31 [2022-11-26 00:50:39,566 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 00:50:39,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:50:39,568 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:39,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 7 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:50:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 00:50:39,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-11-26 00:50:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:39,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-26 00:50:39,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2022-11-26 00:50:39,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:39,573 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-26 00:50:39,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:39,574 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-26 00:50:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:50:39,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:39,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:39,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:39,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:39,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:50:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash -496907627, now seen corresponding path program 1 times [2022-11-26 00:50:39,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:39,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286371163] [2022-11-26 00:50:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:39,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:39,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:50:39,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946991652] [2022-11-26 00:50:39,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:39,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:39,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:39,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:39,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:50:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:50:39,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:50:39,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:50:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:50:39,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:39,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286371163] [2022-11-26 00:50:39,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:50:39,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946991652] [2022-11-26 00:50:39,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946991652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:50:39,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777683088] [2022-11-26 00:50:39,976 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:50:39,977 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:50:39,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:50:39,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:50:39,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:50:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,088 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 00:50:40,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 00:50:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,148 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:50:40,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:50:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-26 00:50:40,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:40,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:50:40,736 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-26 00:50:40,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 260 [2022-11-26 00:50:40,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:41,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:41,199 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:50:41,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [777683088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:50:41,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:50:41,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-26 00:50:41,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308909955] [2022-11-26 00:50:41,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:50:41,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:50:41,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:41,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:50:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:50:41,663 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:41,765 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-11-26 00:50:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:50:41,766 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:50:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:41,767 INFO L225 Difference]: With dead ends: 25 [2022-11-26 00:50:41,767 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 00:50:41,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:50:41,769 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:41,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:50:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 00:50:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-11-26 00:50:41,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:41,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-26 00:50:41,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-11-26 00:50:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:41,783 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-26 00:50:41,783 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-26 00:50:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:50:41,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:41,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:41,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:41,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:41,991 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:50:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1125446304, now seen corresponding path program 1 times [2022-11-26 00:50:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:41,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878082263] [2022-11-26 00:50:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:41,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:41,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:50:42,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082834399] [2022-11-26 00:50:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:42,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:42,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:42,002 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:42,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:50:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:42,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:50:42,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:50:42,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:50:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:50:42,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:42,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878082263] [2022-11-26 00:50:42,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:50:42,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082834399] [2022-11-26 00:50:42,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082834399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:50:42,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1799237524] [2022-11-26 00:50:42,116 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:50:42,116 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:50:42,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:50:42,116 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:50:42,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:50:42,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:42,175 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 00:50:42,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 00:50:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:42,232 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:50:42,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:50:42,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:42,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-26 00:50:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:42,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:50:42,556 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-26 00:50:42,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 267 treesize of output 260 [2022-11-26 00:50:42,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:42,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:43,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:50:45,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~max~0#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 00:50:45,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:50:45,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:50:45,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-26 00:50:45,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608155309] [2022-11-26 00:50:45,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:50:45,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:50:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:50:45,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:50:45,812 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:45,939 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-11-26 00:50:45,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:50:45,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:50:45,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:45,942 INFO L225 Difference]: With dead ends: 52 [2022-11-26 00:50:45,942 INFO L226 Difference]: Without dead ends: 38 [2022-11-26 00:50:45,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:50:45,946 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 96 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:45,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 13 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:50:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-26 00:50:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-26 00:50:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-26 00:50:45,972 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2022-11-26 00:50:45,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:45,972 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-26 00:50:45,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:45,972 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-26 00:50:45,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:50:45,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:45,974 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:45,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:46,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:46,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:50:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash 311535379, now seen corresponding path program 2 times [2022-11-26 00:50:46,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:46,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842289644] [2022-11-26 00:50:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:46,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:46,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:50:46,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428817242] [2022-11-26 00:50:46,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:50:46,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:46,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:46,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:46,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:50:46,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:50:46,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:50:46,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:50:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:50:46,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:50:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:50:46,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842289644] [2022-11-26 00:50:46,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:50:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428817242] [2022-11-26 00:50:46,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428817242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:50:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679138309] [2022-11-26 00:50:46,328 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:50:46,328 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:50:46,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:50:46,329 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:50:46,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:50:46,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:46,385 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:50:46,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:50:46,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:46,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-26 00:50:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:46,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 00:50:46,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:46,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:46,654 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-26 00:50:46,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 258 [2022-11-26 00:50:46,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:46,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:47,066 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:50:47,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '682#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~max~0#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 00:50:47,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:50:47,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:50:47,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-26 00:50:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254542843] [2022-11-26 00:50:47,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:50:47,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:50:47,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:50:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:50:47,943 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:48,042 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-11-26 00:50:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:50:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 00:50:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:48,046 INFO L225 Difference]: With dead ends: 72 [2022-11-26 00:50:48,046 INFO L226 Difference]: Without dead ends: 49 [2022-11-26 00:50:48,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:50:48,048 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:48,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:50:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-26 00:50:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-26 00:50:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-11-26 00:50:48,073 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2022-11-26 00:50:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:48,074 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-11-26 00:50:48,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-11-26 00:50:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:50:48,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:48,075 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:48,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:48,282 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:50:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash 236210283, now seen corresponding path program 3 times [2022-11-26 00:50:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:48,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284117398] [2022-11-26 00:50:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:48,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:48,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:50:48,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752594920] [2022-11-26 00:50:48,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:50:48,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:48,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:48,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:48,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:50:48,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:50:48,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:50:48,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:50:48,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:50:48,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:50:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:50:48,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:48,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284117398] [2022-11-26 00:50:48,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:50:48,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752594920] [2022-11-26 00:50:48,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752594920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:50:48,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [804937805] [2022-11-26 00:50:48,594 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:50:48,595 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:50:48,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:50:48,596 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:50:48,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:50:48,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,665 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 00:50:48,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 00:50:48,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,721 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:50:48,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:50:48,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 00:50:48,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:49,016 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-26 00:50:49,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 258 [2022-11-26 00:50:49,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:49,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:49,478 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:50:50,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1142#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~max~0#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 00:50:50,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:50:50,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:50:50,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-26 00:50:50,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256811658] [2022-11-26 00:50:50,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:50:50,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:50:50,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:50,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:50:50,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:50:50,443 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:51,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:51,085 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2022-11-26 00:50:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:50:51,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-26 00:50:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:51,091 INFO L225 Difference]: With dead ends: 154 [2022-11-26 00:50:51,091 INFO L226 Difference]: Without dead ends: 138 [2022-11-26 00:50:51,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=422, Invalid=1060, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:50:51,093 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:51,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 76 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:50:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-26 00:50:51,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 67. [2022-11-26 00:50:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-11-26 00:50:51,165 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 37 [2022-11-26 00:50:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:51,165 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-11-26 00:50:51,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-11-26 00:50:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-26 00:50:51,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:51,167 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:51,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:51,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:51,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:50:51,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1997355815, now seen corresponding path program 4 times [2022-11-26 00:50:51,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:51,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620510716] [2022-11-26 00:50:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:51,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:51,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:50:51,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634608902] [2022-11-26 00:50:51,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:50:51,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:51,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:51,402 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:51,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:50:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:50:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:50:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-11-26 00:50:51,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:50:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-11-26 00:50:51,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:51,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620510716] [2022-11-26 00:50:51,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:50:51,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634608902] [2022-11-26 00:50:51,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634608902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:50:51,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1397525225] [2022-11-26 00:50:51,732 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:50:51,732 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:50:51,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:50:51,732 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:50:51,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:50:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:51,787 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 00:50:51,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 00:50:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:51,843 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:50:51,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:50:51,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:51,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 00:50:52,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:52,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:52,104 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-26 00:50:52,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 258 [2022-11-26 00:50:52,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:52,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:52,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:50:53,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1917#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~max~0#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 00:50:53,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:50:53,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:50:53,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-26 00:50:53,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456248466] [2022-11-26 00:50:53,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:50:53,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:50:53,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:50:53,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:50:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:50:53,285 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:50:53,593 INFO L93 Difference]: Finished difference Result 212 states and 290 transitions. [2022-11-26 00:50:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:50:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-26 00:50:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:50:53,596 INFO L225 Difference]: With dead ends: 212 [2022-11-26 00:50:53,596 INFO L226 Difference]: Without dead ends: 152 [2022-11-26 00:50:53,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:50:53,597 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 144 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:50:53,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 31 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:50:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-26 00:50:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2022-11-26 00:50:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 132 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2022-11-26 00:50:53,660 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 55 [2022-11-26 00:50:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:50:53,661 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2022-11-26 00:50:53,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:50:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2022-11-26 00:50:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-26 00:50:53,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:50:53,664 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:50:53,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:50:53,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:53,870 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:50:53,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:50:53,871 INFO L85 PathProgramCache]: Analyzing trace with hash -975066457, now seen corresponding path program 5 times [2022-11-26 00:50:53,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:50:53,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640139417] [2022-11-26 00:50:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:50:53,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:50:53,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:50:53,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124194231] [2022-11-26 00:50:53,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:50:53,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:50:53,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:50:53,909 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:50:53,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:50:57,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-26 00:50:57,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:50:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:50:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:50:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2022-11-26 00:50:58,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:50:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 4 proven. 418 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2022-11-26 00:50:58,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:50:58,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640139417] [2022-11-26 00:50:58,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:50:58,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124194231] [2022-11-26 00:50:58,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124194231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:50:58,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033813690] [2022-11-26 00:50:58,519 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:50:58,519 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:50:58,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:50:58,520 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:50:58,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:50:58,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:58,565 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:50:58,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:50:58,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:58,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-26 00:50:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:58,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 00:50:58,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:58,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:50:58,831 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-26 00:50:58,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 258 [2022-11-26 00:50:58,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:59,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:50:59,273 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:00,163 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3211#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~max~0#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:00,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:00,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:51:00,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-26 00:51:00,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686962928] [2022-11-26 00:51:00,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:00,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:51:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:51:00,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:51:00,166 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:00,928 INFO L93 Difference]: Finished difference Result 428 states and 566 transitions. [2022-11-26 00:51:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:51:00,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-26 00:51:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:00,931 INFO L225 Difference]: With dead ends: 428 [2022-11-26 00:51:00,931 INFO L226 Difference]: Without dead ends: 308 [2022-11-26 00:51:00,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 271 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=723, Invalid=1083, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:51:00,935 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 500 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:00,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 67 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:51:00,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-26 00:51:01,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 265. [2022-11-26 00:51:01,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2022-11-26 00:51:01,010 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 103 [2022-11-26 00:51:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:01,011 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2022-11-26 00:51:01,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:01,011 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2022-11-26 00:51:01,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-26 00:51:01,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:01,018 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:01,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:01,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:01,235 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:51:01,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:01,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1794148775, now seen corresponding path program 6 times [2022-11-26 00:51:01,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:01,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160362981] [2022-11-26 00:51:01,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:01,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:01,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:51:01,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340620327] [2022-11-26 00:51:01,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:51:01,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:01,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:01,304 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:01,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:51:01,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:51:01,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:51:01,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:51:01,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 231 proven. 3206 refuted. 0 times theorem prover too weak. 4955 trivial. 0 not checked. [2022-11-26 00:51:02,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 231 proven. 3206 refuted. 0 times theorem prover too weak. 4955 trivial. 0 not checked. [2022-11-26 00:51:03,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:03,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160362981] [2022-11-26 00:51:03,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:51:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340620327] [2022-11-26 00:51:03,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340620327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1564495719] [2022-11-26 00:51:03,197 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:51:03,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:03,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:03,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:03,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:03,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:03,237 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 00:51:03,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 00:51:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:03,280 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:51:03,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:51:03,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:03,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 00:51:03,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:03,537 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-26 00:51:03,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 258 [2022-11-26 00:51:03,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:51:03,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:51:03,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:05,144 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5767#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~max~0#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:05,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:05,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:51:05,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-11-26 00:51:05,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384408664] [2022-11-26 00:51:05,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:05,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-26 00:51:05,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:05,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-26 00:51:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1261, Invalid=2771, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:51:05,150 INFO L87 Difference]: Start difference. First operand 265 states and 297 transitions. Second operand has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:09,291 INFO L93 Difference]: Finished difference Result 1437 states and 1647 transitions. [2022-11-26 00:51:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-26 00:51:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-11-26 00:51:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:09,304 INFO L225 Difference]: With dead ends: 1437 [2022-11-26 00:51:09,304 INFO L226 Difference]: Without dead ends: 1367 [2022-11-26 00:51:09,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 605 SyntacticMatches, 6 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11352 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8544, Invalid=19512, Unknown=0, NotChecked=0, Total=28056 [2022-11-26 00:51:09,312 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 572 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:09,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 712 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:51:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2022-11-26 00:51:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 409. [2022-11-26 00:51:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.0955882352941178) internal successors, (447), 408 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 447 transitions. [2022-11-26 00:51:09,448 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 447 transitions. Word has length 199 [2022-11-26 00:51:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:09,449 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 447 transitions. [2022-11-26 00:51:09,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 447 transitions. [2022-11-26 00:51:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-11-26 00:51:09,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:09,453 INFO L195 NwaCegarLoop]: trace histogram [220, 88, 10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:09,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:09,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 00:51:09,660 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:51:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:09,660 INFO L85 PathProgramCache]: Analyzing trace with hash 454563679, now seen corresponding path program 7 times [2022-11-26 00:51:09,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:09,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410199687] [2022-11-26 00:51:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:09,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:09,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:51:09,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499704203] [2022-11-26 00:51:09,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:51:09,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:09,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:09,754 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:09,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:51:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:51:10,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 1826 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:51:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:51:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30586 backedges. 1591 proven. 253 refuted. 0 times theorem prover too weak. 28742 trivial. 0 not checked. [2022-11-26 00:51:10,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:51:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30586 backedges. 1591 proven. 253 refuted. 0 times theorem prover too weak. 28742 trivial. 0 not checked. [2022-11-26 00:51:11,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:51:11,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410199687] [2022-11-26 00:51:11,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:51:11,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499704203] [2022-11-26 00:51:11,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499704203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:51:11,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811721512] [2022-11-26 00:51:11,535 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:51:11,535 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:51:11,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:51:11,535 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:51:11,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:51:11,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:11,577 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 00:51:11,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 00:51:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:11,614 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:51:11,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:51:11,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:11,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 00:51:11,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:11,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:51:11,815 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-26 00:51:11,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 258 [2022-11-26 00:51:11,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:51:11,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:51:12,208 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:51:13,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11427#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_~max~0#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-26 00:51:13,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:51:13,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:51:13,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-11-26 00:51:13,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416813312] [2022-11-26 00:51:13,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:51:13,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-26 00:51:13,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:51:13,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-26 00:51:13,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1352, Invalid=1728, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:51:13,346 INFO L87 Difference]: Start difference. First operand 409 states and 447 transitions. Second operand has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:51:15,103 INFO L93 Difference]: Finished difference Result 1292 states and 1706 transitions. [2022-11-26 00:51:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-26 00:51:15,104 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 343 [2022-11-26 00:51:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:51:15,107 INFO L225 Difference]: With dead ends: 1292 [2022-11-26 00:51:15,107 INFO L226 Difference]: Without dead ends: 908 [2022-11-26 00:51:15,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 961 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2571, Invalid=3591, Unknown=0, NotChecked=0, Total=6162 [2022-11-26 00:51:15,114 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 912 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:51:15,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 139 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:51:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-11-26 00:51:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 817. [2022-11-26 00:51:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 1.0772058823529411) internal successors, (879), 816 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 879 transitions. [2022-11-26 00:51:15,297 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 879 transitions. Word has length 343 [2022-11-26 00:51:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:51:15,297 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 879 transitions. [2022-11-26 00:51:15,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 879 transitions. [2022-11-26 00:51:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2022-11-26 00:51:15,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:51:15,315 INFO L195 NwaCegarLoop]: trace histogram [460, 184, 10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:51:15,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:51:15,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:15,525 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:51:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:51:15,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1047298977, now seen corresponding path program 8 times [2022-11-26 00:51:15,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:51:15,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493666447] [2022-11-26 00:51:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:51:15,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:51:15,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:51:15,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854790971] [2022-11-26 00:51:15,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:51:15,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:51:15,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:51:15,731 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:51:15,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7f9809-e5bf-404b-939b-1e18624de5e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process