./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh --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 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 --- 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-2329fc7 [2022-12-14 15:59:53,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:59:53,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:59:53,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:59:53,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:59:53,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:59:53,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:59:53,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:59:53,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:59:53,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:59:53,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:59:53,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:59:53,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:59:53,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:59:53,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:59:53,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:59:53,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:59:53,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:59:53,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:59:53,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:59:53,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:59:53,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:59:53,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:59:53,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:59:53,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:59:53,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:59:53,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:59:53,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:59:53,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:59:53,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:59:53,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:59:53,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:59:53,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:59:53,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:59:53,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:59:53,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:59:53,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:59:53,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:59:53,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:59:53,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:59:53,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:59:53,164 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:59:53,183 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:59:53,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:59:53,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:59:53,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:59:53,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:59:53,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:59:53,184 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:59:53,185 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:59:53,185 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:59:53,185 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:59:53,185 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:59:53,185 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:59:53,186 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:59:53,186 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:59:53,186 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:59:53,186 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:59:53,186 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:59:53,187 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:59:53,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:59:53,187 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:59:53,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:59:53,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:59:53,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:59:53,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:59:53,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:59:53,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:59:53,189 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:59:53,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:59:53,189 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:59:53,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:59:53,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:59:53,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:59:53,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:59:53,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:59:53,191 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:59:53,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:59:53,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:59:53,191 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:59:53,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:59:53,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:59:53,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:59:53,192 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_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 [2022-12-14 15:59:53,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:59:53,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:59:53,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:59:53,380 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:59:53,381 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:59:53,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2022-12-14 15:59:55,913 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:59:56,079 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:59:56,079 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2022-12-14 15:59:56,085 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/data/78bbc737f/a4201b42f060467f9677f1a5f6eef2b7/FLAGdce1db859 [2022-12-14 15:59:56,469 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/data/78bbc737f/a4201b42f060467f9677f1a5f6eef2b7 [2022-12-14 15:59:56,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:59:56,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:59:56,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:59:56,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:59:56,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:59:56,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9400843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56, skipping insertion in model container [2022-12-14 15:59:56,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:59:56,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:59:56,599 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_99aaf176-603a-484a-a512-e334624e9dfb/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2022-12-14 15:59:56,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:59:56,625 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:59:56,634 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_99aaf176-603a-484a-a512-e334624e9dfb/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2022-12-14 15:59:56,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:59:56,656 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:59:56,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56 WrapperNode [2022-12-14 15:59:56,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:59:56,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:59:56,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:59:56,657 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:59:56,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,683 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2022-12-14 15:59:56,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:59:56,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:59:56,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:59:56,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:59:56,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,705 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:59:56,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:59:56,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:59:56,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:59:56,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (1/1) ... [2022-12-14 15:59:56,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:59:56,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:56,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:59:56,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:59:56,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:59:56,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:59:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:59:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 15:59:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:59:56,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:59:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 15:59:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:59:56,827 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:59:56,829 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:59:56,948 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:59:57,000 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:59:57,000 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 15:59:57,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:59:57 BoogieIcfgContainer [2022-12-14 15:59:57,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:59:57,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:59:57,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:59:57,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:59:57,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:59:56" (1/3) ... [2022-12-14 15:59:57,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f62b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:59:57, skipping insertion in model container [2022-12-14 15:59:57,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:56" (2/3) ... [2022-12-14 15:59:57,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f62b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:59:57, skipping insertion in model container [2022-12-14 15:59:57,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:59:57" (3/3) ... [2022-12-14 15:59:57,009 INFO L112 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2022-12-14 15:59:57,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:59:57,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:59:57,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:59:57,064 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;@441ef3da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:59:57,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:59:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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) [2022-12-14 15:59:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 15:59:57,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:57,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:57,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2105143125, now seen corresponding path program 1 times [2022-12-14 15:59:57,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:57,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196089464] [2022-12-14 15:59:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:57,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:57,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:59:57,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981632083] [2022-12-14 15:59:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:57,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:57,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:57,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:57,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:59:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:59:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:57,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:57,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:57,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196089464] [2022-12-14 15:59:57,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:59:57,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981632083] [2022-12-14 15:59:57,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981632083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:57,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:57,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:59:57,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802832894] [2022-12-14 15:59:57,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:57,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:57,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:57,286 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-12-14 15:59:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:57,332 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-12-14 15:59:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-12-14 15:59:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:57,339 INFO L225 Difference]: With dead ends: 29 [2022-12-14 15:59:57,339 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 15:59:57,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:57,343 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:57,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:59:57,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 15:59:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-12-14 15:59:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 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) [2022-12-14 15:59:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2022-12-14 15:59:57,365 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 8 [2022-12-14 15:59:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:57,366 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2022-12-14 15:59:57,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-12-14 15:59:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2022-12-14 15:59:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 15:59:57,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:57,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:57,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:59:57,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:57,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2069838014, now seen corresponding path program 1 times [2022-12-14 15:59:57,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:57,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469046678] [2022-12-14 15:59:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:57,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:57,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:59:57,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533358021] [2022-12-14 15:59:57,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:57,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:57,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:57,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:57,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:59:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:59:57,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:57,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:57,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469046678] [2022-12-14 15:59:57,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:59:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533358021] [2022-12-14 15:59:57,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533358021] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:57,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:57,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:59:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644334740] [2022-12-14 15:59:57,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:57,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:59:57,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:57,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:59:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:59:57,824 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-12-14 15:59:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:57,882 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2022-12-14 15:59:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:59:57,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2022-12-14 15:59:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:57,883 INFO L225 Difference]: With dead ends: 40 [2022-12-14 15:59:57,883 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 15:59:57,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:59:57,885 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:57,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:59:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 15:59:57,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2022-12-14 15:59:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2022-12-14 15:59:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2022-12-14 15:59:57,892 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 10 [2022-12-14 15:59:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:57,892 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2022-12-14 15:59:57,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-12-14 15:59:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2022-12-14 15:59:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 15:59:57,893 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:57,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:57,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:59:58,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:58,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:58,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:58,098 INFO L85 PathProgramCache]: Analyzing trace with hash -659159747, now seen corresponding path program 1 times [2022-12-14 15:59:58,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:58,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640495915] [2022-12-14 15:59:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:58,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:58,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:59:58,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826179785] [2022-12-14 15:59:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:58,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:58,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:58,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:58,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:59:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:59:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:58,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:58,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:58,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640495915] [2022-12-14 15:59:58,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:59:58,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826179785] [2022-12-14 15:59:58,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826179785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:58,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:58,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:59:58,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550530960] [2022-12-14 15:59:58,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:58,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:59:58,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:59:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:59:58,241 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-14 15:59:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:58,288 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-12-14 15:59:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:59:58,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2022-12-14 15:59:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:58,289 INFO L225 Difference]: With dead ends: 43 [2022-12-14 15:59:58,289 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 15:59:58,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:59:58,291 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:58,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:59:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 15:59:58,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-12-14 15:59:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 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) [2022-12-14 15:59:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-12-14 15:59:58,300 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 12 [2022-12-14 15:59:58,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:58,300 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-12-14 15:59:58,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-14 15:59:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-12-14 15:59:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 15:59:58,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:58,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:58,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:59:58,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:58,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash -76150996, now seen corresponding path program 1 times [2022-12-14 15:59:58,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:58,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630905077] [2022-12-14 15:59:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:58,539 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:59:58,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563229914] [2022-12-14 15:59:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:58,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:58,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:58,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:58,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:59:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:58,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 15:59:58,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:58,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:59:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:58,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:58,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630905077] [2022-12-14 15:59:58,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:59:58,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563229914] [2022-12-14 15:59:58,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563229914] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:59:58,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948176418] [2022-12-14 15:59:58,651 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:59:58,652 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:59:58,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:59:58,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:59:58,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:59:58,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:59:58,744 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-12-14 15:59:58,745 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 29 treesize of output 45 [2022-12-14 15:59:58,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:59:58,793 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 15:59:58,793 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 [2022-12-14 15:59:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:59:58,857 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 43 treesize of output 45 [2022-12-14 15:59:58,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:59:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:59:59,011 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 15:59:59,012 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 316 treesize of output 292 [2022-12-14 15:59:59,098 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 28 treesize of output 24 [2022-12-14 15:59:59,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:59:59,283 INFO L321 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2022-12-14 15:59:59,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 169 [2022-12-14 15:59:59,341 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 28 treesize of output 24 [2022-12-14 15:59:59,454 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 24 treesize of output 20 [2022-12-14 15:59:59,506 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 28 treesize of output 24 [2022-12-14 15:59:59,544 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 28 treesize of output 24 [2022-12-14 15:59:59,599 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 24 treesize of output 20 [2022-12-14 15:59:59,648 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 15:59:59,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 110 [2022-12-14 15:59:59,684 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 28 treesize of output 24 [2022-12-14 15:59:59,808 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 24 treesize of output 20 [2022-12-14 15:59:59,849 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-12-14 15:59:59,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 110 [2022-12-14 15:59:59,901 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 28 treesize of output 24 [2022-12-14 15:59:59,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:00:00,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1948176418] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:00:00,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 16:00:00,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2022-12-14 16:00:00,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907147957] [2022-12-14 16:00:00,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:00:00,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:00:00,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:00:00,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:00:00,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-12-14 16:00:00,162 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-12-14 16:00:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:00:00,415 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-12-14 16:00:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 16:00:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 [2022-12-14 16:00:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:00:00,416 INFO L225 Difference]: With dead ends: 34 [2022-12-14 16:00:00,416 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 16:00:00,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-12-14 16:00:00,418 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:00:00,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 9 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:00:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 16:00:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-12-14 16:00:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2022-12-14 16:00:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-12-14 16:00:00,430 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-12-14 16:00:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:00:00,430 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-12-14 16:00:00,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-12-14 16:00:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-12-14 16:00:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 16:00:00,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:00:00,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:00:00,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 16:00:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:00,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:00:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:00:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash -270731687, now seen corresponding path program 1 times [2022-12-14 16:00:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:00:00,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66344002] [2022-12-14 16:00:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:00:00,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 16:00:00,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736903336] [2022-12-14 16:00:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:00,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:00,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:00:00,644 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:00:00,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 16:00:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:00,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:00:00,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:00:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:00:00,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:00:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:00:00,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:00:00,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66344002] [2022-12-14 16:00:00,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 16:00:00,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736903336] [2022-12-14 16:00:00,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736903336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:00:00,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948269296] [2022-12-14 16:00:00,761 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:00:00,761 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:00:00,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:00:00,761 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:00:00,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:00:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:00,793 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 16:00:00,793 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 [2022-12-14 16:00:00,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:00,804 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 29 treesize of output 37 [2022-12-14 16:00:00,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:00,827 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 43 treesize of output 45 [2022-12-14 16:00:00,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:00,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:00,893 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 16:00:00,894 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 316 treesize of output 292 [2022-12-14 16:00:00,935 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 28 treesize of output 24 [2022-12-14 16:00:01,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:01,017 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 16:00:01,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 165 [2022-12-14 16:00:01,056 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 28 treesize of output 24 [2022-12-14 16:00:01,080 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 28 treesize of output 24 [2022-12-14 16:00:01,123 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 24 treesize of output 20 [2022-12-14 16:00:01,143 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 28 treesize of output 24 [2022-12-14 16:00:01,173 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 28 treesize of output 24 [2022-12-14 16:00:01,244 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 28 treesize of output 24 [2022-12-14 16:00:01,278 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 28 treesize of output 24 [2022-12-14 16:00:01,299 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 28 treesize of output 24 [2022-12-14 16:00:01,340 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 24 treesize of output 20 [2022-12-14 16:00:01,372 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 28 treesize of output 24 [2022-12-14 16:00:01,398 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 28 treesize of output 24 [2022-12-14 16:00:01,985 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 24 treesize of output 20 [2022-12-14 16:00:02,023 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 28 treesize of output 24 [2022-12-14 16:00:02,041 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 28 treesize of output 24 [2022-12-14 16:00:02,083 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 28 treesize of output 24 [2022-12-14 16:00:02,105 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 28 treesize of output 24 [2022-12-14 16:00:02,135 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 24 treesize of output 20 [2022-12-14 16:00:02,173 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 28 treesize of output 24 [2022-12-14 16:00:02,191 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 28 treesize of output 24 [2022-12-14 16:00:02,196 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:00:02,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '698#(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) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4))))) |ULTIMATE.start_main_#t~mem8#1|) (= |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 [2022-12-14 16:00:02,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:00:02,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 16:00:02,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-14 16:00:02,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289420739] [2022-12-14 16:00:02,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 16:00:02,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 16:00:02,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:00:02,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 16:00:02,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:00:02,476 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2022-12-14 16:00:02,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:00:02,557 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2022-12-14 16:00:02,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 16:00:02,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 18 [2022-12-14 16:00:02,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:00:02,558 INFO L225 Difference]: With dead ends: 64 [2022-12-14 16:00:02,558 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 16:00:02,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-12-14 16:00:02,559 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:00:02,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 18 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:00:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 16:00:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-12-14 16:00:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 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) [2022-12-14 16:00:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-12-14 16:00:02,568 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2022-12-14 16:00:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:00:02,568 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-12-14 16:00:02,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2022-12-14 16:00:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-12-14 16:00:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 16:00:02,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:00:02,569 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:00:02,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 16:00:02,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:02,770 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:00:02,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:00:02,772 INFO L85 PathProgramCache]: Analyzing trace with hash 320468768, now seen corresponding path program 2 times [2022-12-14 16:00:02,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:00:02,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207594612] [2022-12-14 16:00:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:02,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:00:02,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 16:00:02,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009975836] [2022-12-14 16:00:02,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:00:02,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:02,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:00:02,805 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:00:02,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 16:00:02,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 16:00:02,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:00:02,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:00:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:00:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 16:00:02,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:00:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 16:00:02,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:00:02,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207594612] [2022-12-14 16:00:02,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 16:00:02,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009975836] [2022-12-14 16:00:02,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009975836] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:00:02,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059824241] [2022-12-14 16:00:02,980 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:00:02,980 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:00:02,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:00:02,980 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:00:02,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:00:02,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:03,011 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-12-14 16:00:03,011 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 29 treesize of output 45 [2022-12-14 16:00:03,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:03,038 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 16:00:03,038 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 [2022-12-14 16:00:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:03,071 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 43 treesize of output 45 [2022-12-14 16:00:03,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:03,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:03,168 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-12-14 16:00:03,168 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 316 treesize of output 292 [2022-12-14 16:00:03,223 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 28 treesize of output 24 [2022-12-14 16:00:03,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:00:03,322 INFO L321 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2022-12-14 16:00:03,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 169 [2022-12-14 16:00:03,361 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 28 treesize of output 24 [2022-12-14 16:00:03,410 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 28 treesize of output 24 [2022-12-14 16:00:03,432 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 28 treesize of output 24 [2022-12-14 16:00:03,493 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 28 treesize of output 24 [2022-12-14 16:00:03,526 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 28 treesize of output 24 [2022-12-14 16:00:03,546 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 28 treesize of output 24 [2022-12-14 16:00:03,587 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 28 treesize of output 24 [2022-12-14 16:00:03,606 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 28 treesize of output 24 [2022-12-14 16:00:04,222 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 24 treesize of output 20 [2022-12-14 16:00:04,248 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 28 treesize of output 24 [2022-12-14 16:00:04,268 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 28 treesize of output 24 [2022-12-14 16:00:04,300 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 28 treesize of output 24 [2022-12-14 16:00:04,320 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 28 treesize of output 24 [2022-12-14 16:00:04,344 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 28 treesize of output 24 [2022-12-14 16:00:04,361 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 28 treesize of output 24 [2022-12-14 16:00:04,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:00:04,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1033#(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) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |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) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~p~0#1| 4))))) |ULTIMATE.start_main_#t~mem8#1|) (= |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 [2022-12-14 16:00:04,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:00:04,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 16:00:04,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-14 16:00:04,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474934496] [2022-12-14 16:00:04,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 16:00:04,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 16:00:04,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:00:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 16:00:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:00:04,691 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2022-12-14 16:00:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:00:04,796 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2022-12-14 16:00:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 16:00:04,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 24 [2022-12-14 16:00:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:00:04,798 INFO L225 Difference]: With dead ends: 167 [2022-12-14 16:00:04,798 INFO L226 Difference]: Without dead ends: 140 [2022-12-14 16:00:04,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-12-14 16:00:04,799 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:00:04,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 28 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:00:04,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-14 16:00:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 85. [2022-12-14 16:00:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 84 states have internal predecessors, (108), 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) [2022-12-14 16:00:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2022-12-14 16:00:04,825 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 24 [2022-12-14 16:00:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:00:04,825 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2022-12-14 16:00:04,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2022-12-14 16:00:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2022-12-14 16:00:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 16:00:04,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:00:04,827 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:00:04,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 16:00:05,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:05,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:00:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:00:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1677872257, now seen corresponding path program 3 times [2022-12-14 16:00:05,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:00:05,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902339409] [2022-12-14 16:00:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:05,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:00:05,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 16:00:05,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716759151] [2022-12-14 16:00:05,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:00:05,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:05,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:00:05,043 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:00:05,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 16:00:05,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:00:05,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:00:05,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 16:00:05,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:00:32,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 16:00:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 48 proven. 0 refuted. 48 times theorem prover too weak. 360 trivial. 0 not checked. [2022-12-14 16:00:32,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:01:12,313 WARN L233 SmtUtils]: Spent 24.46s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:02:59,047 WARN L233 SmtUtils]: Spent 1.59m on a formula simplification. DAG size of input: 281 DAG size of output: 280 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:06:37,383 WARN L233 SmtUtils]: Spent 3.37m on a formula simplification. DAG size of input: 544 DAG size of output: 543 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:10:00,696 WARN L233 SmtUtils]: Spent 2.94m on a formula simplification that was a NOOP. DAG size: 1145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:12:15,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-12-14 16:12:15,429 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-12-14 16:12:15,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:12:15,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902339409] [2022-12-14 16:12:15,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 16:12:15,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716759151] [2022-12-14 16:12:15,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-12-14 16:12:15,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [167452154] [2022-12-14 16:12:15,432 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 16:12:15,432 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:12:15,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:12:15,433 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:12:15,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:12:15,435 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:273) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 44 more [2022-12-14 16:12:15,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:12:15,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-12-14 16:12:15,437 ERROR L170 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2022-12-14 16:12:15,437 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2022-12-14 16:12:15,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 16:12:15,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 16:12:15,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 16:12:15,650 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2022-12-14 16:12:15,656 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 16:12:15,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 04:12:15 BoogieIcfgContainer [2022-12-14 16:12:15,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 16:12:15,681 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 16:12:15,681 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 16:12:15,681 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 16:12:15,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:59:57" (3/4) ... [2022-12-14 16:12:15,683 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 16:12:15,683 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 16:12:15,684 INFO L158 Benchmark]: Toolchain (without parser) took 739211.77ms. Allocated memory was 146.8MB in the beginning and 192.9MB in the end (delta: 46.1MB). Free memory was 116.8MB in the beginning and 91.4MB in the end (delta: 25.4MB). Peak memory consumption was 74.6MB. Max. memory is 16.1GB. [2022-12-14 16:12:15,684 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 146.8MB. Free memory was 121.9MB in the beginning and 121.9MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 16:12:15,684 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.94ms. Allocated memory is still 146.8MB. Free memory was 116.8MB in the beginning and 105.7MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 16:12:15,684 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.91ms. Allocated memory is still 146.8MB. Free memory was 105.7MB in the beginning and 104.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 16:12:15,684 INFO L158 Benchmark]: Boogie Preprocessor took 23.47ms. Allocated memory is still 146.8MB. Free memory was 104.3MB in the beginning and 103.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 16:12:15,684 INFO L158 Benchmark]: RCFGBuilder took 293.73ms. Allocated memory is still 146.8MB. Free memory was 102.4MB in the beginning and 86.8MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 16:12:15,685 INFO L158 Benchmark]: TraceAbstraction took 738676.50ms. Allocated memory was 146.8MB in the beginning and 192.9MB in the end (delta: 46.1MB). Free memory was 86.2MB in the beginning and 92.5MB in the end (delta: -6.2MB). Peak memory consumption was 41.1MB. Max. memory is 16.1GB. [2022-12-14 16:12:15,685 INFO L158 Benchmark]: Witness Printer took 2.45ms. Allocated memory is still 192.9MB. Free memory was 92.5MB in the beginning and 91.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 16:12:15,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 146.8MB. Free memory was 121.9MB in the beginning and 121.9MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 182.94ms. Allocated memory is still 146.8MB. Free memory was 116.8MB in the beginning and 105.7MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.91ms. Allocated memory is still 146.8MB. Free memory was 105.7MB in the beginning and 104.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 23.47ms. Allocated memory is still 146.8MB. Free memory was 104.3MB in the beginning and 103.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 293.73ms. Allocated memory is still 146.8MB. Free memory was 102.4MB in the beginning and 86.8MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 738676.50ms. Allocated memory was 146.8MB in the beginning and 192.9MB in the end (delta: 46.1MB). Free memory was 86.2MB in the beginning and 92.5MB in the end (delta: -6.2MB). Peak memory consumption was 41.1MB. Max. memory is 16.1GB. * Witness Printer took 2.45ms. Allocated memory is still 192.9MB. Free memory was 92.5MB in the beginning and 91.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] int i,j,k; [L17] int m=1000,n=1500,p=1800; [L18] int A [m][n][p]; [L19] int max; [L22] i=0 [L23] j=0 [L24] k=0 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L34] j=j+1 [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L34] j=j+1 [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L34] j=j+1 [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L34] j=j+1 [L36] i=i+1 [L25] COND FALSE !(i < m) [L41] i=0 [L42] j=0 [L43] k=0 [L44] EXPR A [0][0][0] [L44] max=A [0][0][0] [L45] COND TRUE i < m [L46] j=0 [L47] k=0 [L48] COND TRUE j < n [L49] k=0 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND FALSE !(k < p) [L55] j=j+1 [L57] i=i+1 [L45] COND TRUE i < m [L46] j=0 [L47] k=0 [L48] COND TRUE j < n [L49] k=0 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND FALSE !(k < p) [L55] j=j+1 [L57] i=i+1 [L45] COND TRUE i < m [L46] j=0 [L47] k=0 [L48] COND TRUE j < n [L49] k=0 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND FALSE !(k < p) [L55] j=j+1 [L57] i=i+1 [L45] COND TRUE i < m [L46] j=0 [L47] k=0 [L48] COND TRUE j < n [L49] k=0 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND FALSE !(A[i][j][k]>max) [L53] k=k+1 [L50] COND FALSE !(k < p) [L55] j=j+1 [L57] i=i+1 [L63] i=0 [L64] j=0 [L65] k=0 [L66] COND TRUE i < m [L67] j=0 [L68] k=0 [L69] COND TRUE j < n [L70] k=0 [L71] COND TRUE k < p [L72] EXPR A[i][j][k] [L72] CALL __VERIFIER_assert(A[i][j][k]<=max) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 738.6s, OverallIterations: 7, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 264 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 264 mSDsluCounter, 95 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 50 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 230 IncrementalHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 45 mSDtfsCounter, 230 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 132 SyntacticMatches, 15 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=6, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 82 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 730.6s InterpolantComputationTime, 157 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 202 ConstructedInterpolants, 12 QuantifiedInterpolants, 953 SizeOfPredicates, 28 NumberOfNonLiveVariables, 812 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 471/525 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 10, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 36, TOOLS_POST_TIME: 1.0s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 36, TOOLS_QUANTIFIERELIM_TIME: 1.0s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 88, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 12, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 18, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 10, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 6, LOOP_SUMMARIZER_CACHE_MISSES: 6, LOOP_SUMMARIZER_OVERALL_TIME: 1.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 18, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 125, DAG_COMPRESSION_RETAINED_NODES: 37, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh --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 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 --- 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-2329fc7 [2022-12-14 16:12:17,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 16:12:17,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 16:12:17,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 16:12:17,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 16:12:17,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 16:12:17,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 16:12:17,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 16:12:17,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 16:12:17,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 16:12:17,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 16:12:17,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 16:12:17,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 16:12:17,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 16:12:17,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 16:12:17,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 16:12:17,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 16:12:17,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 16:12:17,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 16:12:17,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 16:12:17,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 16:12:17,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 16:12:17,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 16:12:17,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 16:12:17,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 16:12:17,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 16:12:17,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 16:12:17,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 16:12:17,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 16:12:17,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 16:12:17,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 16:12:17,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 16:12:17,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 16:12:17,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 16:12:17,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 16:12:17,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 16:12:17,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 16:12:17,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 16:12:17,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 16:12:17,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 16:12:17,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 16:12:17,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 16:12:17,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 16:12:17,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 16:12:17,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 16:12:17,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 16:12:17,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 16:12:17,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 16:12:17,148 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 16:12:17,148 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 16:12:17,148 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 16:12:17,148 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 16:12:17,149 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 16:12:17,149 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 16:12:17,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 16:12:17,149 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 16:12:17,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 16:12:17,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 16:12:17,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 16:12:17,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 16:12:17,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 16:12:17,150 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 16:12:17,150 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 16:12:17,150 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 16:12:17,150 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 16:12:17,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 16:12:17,151 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 16:12:17,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 16:12:17,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 16:12:17,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 16:12:17,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 16:12:17,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:12:17,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 16:12:17,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 16:12:17,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 16:12:17,152 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 16:12:17,152 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 16:12:17,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 16:12:17,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 16:12:17,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 16:12:17,152 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 [2022-12-14 16:12:17,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 16:12:17,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 16:12:17,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 16:12:17,399 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 16:12:17,399 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 16:12:17,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2022-12-14 16:12:19,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 16:12:20,120 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 16:12:20,120 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2022-12-14 16:12:20,127 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/data/a2e841f19/43819fa9073947d58c831ba32cd74ef2/FLAG47b66e740 [2022-12-14 16:12:20,141 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/data/a2e841f19/43819fa9073947d58c831ba32cd74ef2 [2022-12-14 16:12:20,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 16:12:20,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 16:12:20,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 16:12:20,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 16:12:20,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 16:12:20,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@496a6795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20, skipping insertion in model container [2022-12-14 16:12:20,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 16:12:20,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 16:12:20,299 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_99aaf176-603a-484a-a512-e334624e9dfb/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2022-12-14 16:12:20,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:12:20,331 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 16:12:20,341 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_99aaf176-603a-484a-a512-e334624e9dfb/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2022-12-14 16:12:20,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:12:20,365 INFO L208 MainTranslator]: Completed translation [2022-12-14 16:12:20,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20 WrapperNode [2022-12-14 16:12:20,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 16:12:20,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 16:12:20,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 16:12:20,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 16:12:20,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,395 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2022-12-14 16:12:20,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 16:12:20,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 16:12:20,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 16:12:20,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 16:12:20,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,420 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 16:12:20,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 16:12:20,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 16:12:20,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 16:12:20,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (1/1) ... [2022-12-14 16:12:20,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:12:20,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:12:20,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 16:12:20,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 16:12:20,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 16:12:20,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 16:12:20,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 16:12:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 16:12:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 16:12:20,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 16:12:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 16:12:20,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 16:12:20,570 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 16:12:20,572 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 16:12:20,932 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 16:12:20,936 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 16:12:20,937 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 16:12:20,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:12:20 BoogieIcfgContainer [2022-12-14 16:12:20,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 16:12:20,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 16:12:20,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 16:12:20,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 16:12:20,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:12:20" (1/3) ... [2022-12-14 16:12:20,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a20820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:12:20, skipping insertion in model container [2022-12-14 16:12:20,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:12:20" (2/3) ... [2022-12-14 16:12:20,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a20820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:12:20, skipping insertion in model container [2022-12-14 16:12:20,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:12:20" (3/3) ... [2022-12-14 16:12:20,947 INFO L112 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2022-12-14 16:12:20,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 16:12:20,963 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 16:12:20,999 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 16:12:21,004 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;@3c3c55ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 16:12:21,004 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 16:12:21,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 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) [2022-12-14 16:12:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 16:12:21,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:21,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:21,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:21,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:21,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2022-12-14 16:12:21,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:12:21,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62431215] [2022-12-14 16:12:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:21,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:21,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:12:21,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:12:21,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 16:12:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:21,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 16:12:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:12:21,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:12:21,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:12:21,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62431215] [2022-12-14 16:12:21,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62431215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:12:21,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:12:21,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:12:21,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712202695] [2022-12-14 16:12:21,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:12:21,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 16:12:21,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:12:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 16:12:21,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 16:12:21,156 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-12-14 16:12:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:21,168 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2022-12-14 16:12:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 16:12:21,170 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2022-12-14 16:12:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:21,175 INFO L225 Difference]: With dead ends: 56 [2022-12-14 16:12:21,175 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 16:12:21,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 16:12:21,179 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:21,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:12:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 16:12:21,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 16:12:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 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) [2022-12-14 16:12:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-12-14 16:12:21,201 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2022-12-14 16:12:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:21,201 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-12-14 16:12:21,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-12-14 16:12:21,201 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-12-14 16:12:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 16:12:21,202 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:21,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:21,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 16:12:21,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:21,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2022-12-14 16:12:21,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:12:21,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542928947] [2022-12-14 16:12:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:21,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:12:21,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:12:21,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 16:12:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:21,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:12:21,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:12:21,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:12:21,547 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:12:21,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542928947] [2022-12-14 16:12:21,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542928947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:12:21,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:12:21,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:12:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082578460] [2022-12-14 16:12:21,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:12:21,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:12:21,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:12:21,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:12:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:12:21,549 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-12-14 16:12:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:21,792 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2022-12-14 16:12:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:12:21,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2022-12-14 16:12:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:21,797 INFO L225 Difference]: With dead ends: 48 [2022-12-14 16:12:21,797 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 16:12:21,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:12:21,798 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:21,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 16:12:21,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 16:12:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-12-14 16:12:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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) [2022-12-14 16:12:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-12-14 16:12:21,802 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2022-12-14 16:12:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:21,803 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-12-14 16:12:21,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-12-14 16:12:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-12-14 16:12:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 16:12:21,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:21,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:21,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 16:12:22,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:22,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:22,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:22,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2022-12-14 16:12:22,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:12:22,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758152142] [2022-12-14 16:12:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:22,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:22,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:12:22,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:12:22,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 16:12:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:12:22,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:12:22,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:12:22,146 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:12:22,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758152142] [2022-12-14 16:12:22,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758152142] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:12:22,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:12:22,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:12:22,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900906161] [2022-12-14 16:12:22,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:12:22,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:12:22,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:12:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:12:22,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:12:22,148 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-12-14 16:12:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:22,515 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2022-12-14 16:12:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:12:22,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-12-14 16:12:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:22,516 INFO L225 Difference]: With dead ends: 67 [2022-12-14 16:12:22,516 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 16:12:22,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:12:22,517 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:22,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:12:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 16:12:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-12-14 16:12:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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) [2022-12-14 16:12:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-12-14 16:12:22,526 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2022-12-14 16:12:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:22,526 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-12-14 16:12:22,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-12-14 16:12:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-12-14 16:12:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 16:12:22,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:22,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:22,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 16:12:22,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:22,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:22,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2022-12-14 16:12:22,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:12:22,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960434394] [2022-12-14 16:12:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:22,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:22,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:12:22,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:12:22,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 16:12:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:22,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:12:22,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:12:22,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:12:22,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:12:22,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960434394] [2022-12-14 16:12:22,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960434394] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:12:22,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:12:22,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 16:12:22,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970227636] [2022-12-14 16:12:22,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:12:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:12:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:12:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:12:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:12:22,863 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2022-12-14 16:12:23,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:23,170 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-12-14 16:12:23,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:12:23,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 17 [2022-12-14 16:12:23,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:23,172 INFO L225 Difference]: With dead ends: 67 [2022-12-14 16:12:23,172 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 16:12:23,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 16:12:23,174 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:23,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 42 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:12:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 16:12:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-12-14 16:12:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 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) [2022-12-14 16:12:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-12-14 16:12:23,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-12-14 16:12:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:23,180 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-12-14 16:12:23,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2022-12-14 16:12:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-12-14 16:12:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 16:12:23,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:23,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:23,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 16:12:23,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:23,383 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2022-12-14 16:12:23,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:12:23,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492469943] [2022-12-14 16:12:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:23,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:23,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:12:23,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:12:23,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 16:12:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:23,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:12:23,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:12:23,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:12:23,546 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:12:23,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492469943] [2022-12-14 16:12:23,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492469943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:23,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [402228508] [2022-12-14 16:12:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:23,546 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:12:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:12:23,552 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:12:23,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 16:12:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:23,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:12:23,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:12:23,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:12:23,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [402228508] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:23,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588991163] [2022-12-14 16:12:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:23,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:12:23,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:12:23,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:12:23,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 16:12:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:23,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:12:23,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:12:23,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:12:23,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588991163] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:12:23,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 16:12:23,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2022-12-14 16:12:23,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925712443] [2022-12-14 16:12:23,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:12:23,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 16:12:23,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:12:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 16:12:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:12:23,828 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-12-14 16:12:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:24,219 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2022-12-14 16:12:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 16:12:24,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 18 [2022-12-14 16:12:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:24,225 INFO L225 Difference]: With dead ends: 70 [2022-12-14 16:12:24,225 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 16:12:24,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:12:24,226 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:24,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 42 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:12:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 16:12:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-12-14 16:12:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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) [2022-12-14 16:12:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-12-14 16:12:24,233 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 18 [2022-12-14 16:12:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:24,233 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-12-14 16:12:24,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-12-14 16:12:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-12-14 16:12:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 16:12:24,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:24,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:24,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 16:12:24,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 16:12:24,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 16:12:24,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:24,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:24,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2016317688, now seen corresponding path program 1 times [2022-12-14 16:12:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:12:24,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491674673] [2022-12-14 16:12:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:24,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:24,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:12:24,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:12:24,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 16:12:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:24,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:12:24,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:12:24,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:12:24,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:12:24,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491674673] [2022-12-14 16:12:24,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491674673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:24,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [257096333] [2022-12-14 16:12:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:24,999 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:12:24,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:12:25,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:12:25,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-12-14 16:12:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:25,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:12:25,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:12:25,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:12:25,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [257096333] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:25,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598787] [2022-12-14 16:12:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:12:25,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:12:25,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:12:25,115 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:12:25,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 16:12:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:12:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:12:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:12:25,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 16:12:25,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598787] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:25,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:12:25,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-12-14 16:12:25,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739339624] [2022-12-14 16:12:25,272 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:12:25,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 16:12:25,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:12:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 16:12:25,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 16:12:25,273 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-12-14 16:12:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:25,971 INFO L93 Difference]: Finished difference Result 91 states and 121 transitions. [2022-12-14 16:12:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 16:12:25,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 27 [2022-12-14 16:12:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:25,972 INFO L225 Difference]: With dead ends: 91 [2022-12-14 16:12:25,972 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 16:12:25,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:12:25,973 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:25,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 90 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:12:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 16:12:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2022-12-14 16:12:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 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) [2022-12-14 16:12:25,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-12-14 16:12:25,984 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 27 [2022-12-14 16:12:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:25,984 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-12-14 16:12:25,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-12-14 16:12:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-12-14 16:12:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 16:12:25,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:25,985 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:25,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 16:12:26,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 16:12:26,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-12-14 16:12:26,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 16:12:26,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:26,590 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 2 times [2022-12-14 16:12:26,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:12:26,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836651162] [2022-12-14 16:12:26,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 16:12:26,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:26,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:12:26,594 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:12:26,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 16:12:26,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 16:12:26,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:12:26,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 16:12:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 16:12:26,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 16:12:26,997 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:12:26,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836651162] [2022-12-14 16:12:26,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836651162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:26,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [717266718] [2022-12-14 16:12:26,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 16:12:26,998 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:12:26,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:12:26,998 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:12:26,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 16:12:27,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 16:12:27,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:12:27,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 16:12:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 16:12:27,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 16:12:27,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [717266718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:27,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197793075] [2022-12-14 16:12:27,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 16:12:27,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:12:27,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:12:27,259 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:12:27,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 16:12:27,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 16:12:27,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:12:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:12:27,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 16:12:27,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 16:12:27,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197793075] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:27,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:12:27,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 5, 5] total 20 [2022-12-14 16:12:27,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837349347] [2022-12-14 16:12:27,620 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:12:27,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 16:12:27,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:12:27,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 16:12:27,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-12-14 16:12:27,622 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 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) [2022-12-14 16:12:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:33,024 INFO L93 Difference]: Finished difference Result 463 states and 616 transitions. [2022-12-14 16:12:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 16:12:33,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 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 39 [2022-12-14 16:12:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:33,026 INFO L225 Difference]: With dead ends: 463 [2022-12-14 16:12:33,026 INFO L226 Difference]: Without dead ends: 412 [2022-12-14 16:12:33,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1135, Invalid=3025, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 16:12:33,028 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2965 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2965 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:33,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2965 Valid, 374 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 16:12:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-12-14 16:12:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 333. [2022-12-14 16:12:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.2921686746987953) internal successors, (429), 332 states have internal predecessors, (429), 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) [2022-12-14 16:12:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 429 transitions. [2022-12-14 16:12:33,068 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 429 transitions. Word has length 39 [2022-12-14 16:12:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:33,068 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 429 transitions. [2022-12-14 16:12:33,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 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) [2022-12-14 16:12:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 429 transitions. [2022-12-14 16:12:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-12-14 16:12:33,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:33,072 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 40, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:33,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 16:12:33,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 16:12:33,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-12-14 16:12:33,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 16:12:33,674 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:33,675 INFO L85 PathProgramCache]: Analyzing trace with hash 63650675, now seen corresponding path program 3 times [2022-12-14 16:12:33,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:12:33,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62593651] [2022-12-14 16:12:33,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:12:33,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:33,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:12:33,679 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:12:33,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 16:12:33,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 16:12:33,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:12:33,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:12:33,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3485 trivial. 0 not checked. [2022-12-14 16:12:34,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3485 trivial. 0 not checked. [2022-12-14 16:12:34,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:12:34,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62593651] [2022-12-14 16:12:34,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62593651] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:34,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2135599291] [2022-12-14 16:12:34,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:12:34,775 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:12:34,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:12:34,776 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:12:34,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 16:12:34,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 16:12:34,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:12:35,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:12:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3485 trivial. 0 not checked. [2022-12-14 16:12:35,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3485 trivial. 0 not checked. [2022-12-14 16:12:35,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2135599291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:35,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235298418] [2022-12-14 16:12:35,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:12:35,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:12:35,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:12:35,876 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:12:35,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 16:12:35,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 16:12:35,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:12:35,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 16:12:36,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3485 trivial. 0 not checked. [2022-12-14 16:12:36,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3485 trivial. 0 not checked. [2022-12-14 16:12:36,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235298418] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:36,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:12:36,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-12-14 16:12:36,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979116587] [2022-12-14 16:12:36,848 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:12:36,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 16:12:36,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:12:36,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 16:12:36,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 16:12:36,849 INFO L87 Difference]: Start difference. First operand 333 states and 429 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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) [2022-12-14 16:12:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:12:37,583 INFO L93 Difference]: Finished difference Result 1590 states and 2064 transitions. [2022-12-14 16:12:37,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 16:12:37,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 201 [2022-12-14 16:12:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:12:37,588 INFO L225 Difference]: With dead ends: 1590 [2022-12-14 16:12:37,588 INFO L226 Difference]: Without dead ends: 1315 [2022-12-14 16:12:37,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1202 GetRequests, 1194 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:12:37,589 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 264 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:12:37,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 98 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:12:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-12-14 16:12:37,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 903. [2022-12-14 16:12:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 1.2738359201773837) internal successors, (1149), 902 states have internal predecessors, (1149), 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) [2022-12-14 16:12:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1149 transitions. [2022-12-14 16:12:37,722 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1149 transitions. Word has length 201 [2022-12-14 16:12:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:12:37,723 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1149 transitions. [2022-12-14 16:12:37,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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) [2022-12-14 16:12:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1149 transitions. [2022-12-14 16:12:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-12-14 16:12:37,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:12:37,742 INFO L195 NwaCegarLoop]: trace histogram [160, 160, 160, 160, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:12:37,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 16:12:37,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 16:12:38,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-12-14 16:12:38,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 16:12:38,344 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:12:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:12:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1957772799, now seen corresponding path program 4 times [2022-12-14 16:12:38,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:12:38,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107309811] [2022-12-14 16:12:38,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:12:38,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:12:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:12:38,351 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:12:38,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 16:12:39,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:12:39,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:12:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 16:12:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 56892 backedges. 1838 proven. 55 refuted. 0 times theorem prover too weak. 54999 trivial. 0 not checked. [2022-12-14 16:12:39,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 56892 backedges. 1838 proven. 55 refuted. 0 times theorem prover too weak. 54999 trivial. 0 not checked. [2022-12-14 16:12:40,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 16:12:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107309811] [2022-12-14 16:12:40,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107309811] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:40,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [773591427] [2022-12-14 16:12:40,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:12:40,356 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 16:12:40,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 16:12:40,357 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 16:12:40,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 16:12:42,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:12:42,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:12:42,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 16:12:42,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 56892 backedges. 1838 proven. 55 refuted. 0 times theorem prover too weak. 54999 trivial. 0 not checked. [2022-12-14 16:12:42,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 56892 backedges. 1838 proven. 55 refuted. 0 times theorem prover too weak. 54999 trivial. 0 not checked. [2022-12-14 16:12:42,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [773591427] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:42,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700769181] [2022-12-14 16:12:42,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:12:42,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:12:42,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:12:42,401 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:12:42,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 16:12:44,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:12:44,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:12:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 16:12:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:12:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 56892 backedges. 5935 proven. 742 refuted. 0 times theorem prover too weak. 50215 trivial. 0 not checked. [2022-12-14 16:12:44,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:12:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 56892 backedges. 5935 proven. 742 refuted. 0 times theorem prover too weak. 50215 trivial. 0 not checked. [2022-12-14 16:12:45,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700769181] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:12:45,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 16:12:45,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 8, 8] total 38 [2022-12-14 16:12:45,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461396685] [2022-12-14 16:12:45,257 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 16:12:45,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 16:12:45,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 16:12:45,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 16:12:45,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 16:12:45,259 INFO L87 Difference]: Start difference. First operand 903 states and 1149 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 38 states have internal predecessors, (92), 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) [2022-12-14 16:13:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:13:44,890 INFO L93 Difference]: Finished difference Result 5812 states and 8172 transitions. [2022-12-14 16:13:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2022-12-14 16:13:44,890 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 38 states have internal predecessors, (92), 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 771 [2022-12-14 16:13:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:13:44,900 INFO L225 Difference]: With dead ends: 5812 [2022-12-14 16:13:44,901 INFO L226 Difference]: Without dead ends: 4924 [2022-12-14 16:13:44,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4851 GetRequests, 4584 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27679 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=14599, Invalid=57493, Unknown=0, NotChecked=0, Total=72092 [2022-12-14 16:13:44,911 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 23858 mSDsluCounter, 3567 mSDsCounter, 0 mSdLazyCounter, 6492 mSolverCounterSat, 3300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23858 SdHoareTripleChecker+Valid, 3799 SdHoareTripleChecker+Invalid, 9792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3300 IncrementalHoareTripleChecker+Valid, 6492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:13:44,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23858 Valid, 3799 Invalid, 9792 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3300 Valid, 6492 Invalid, 0 Unknown, 0 Unchecked, 28.2s Time] [2022-12-14 16:13:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4924 states. [2022-12-14 16:13:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4924 to 4485. [2022-12-14 16:13:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4484 states have (on average 1.2678412132024979) internal successors, (5685), 4484 states have internal predecessors, (5685), 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) [2022-12-14 16:13:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 5685 transitions. [2022-12-14 16:13:45,372 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 5685 transitions. Word has length 771 [2022-12-14 16:13:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:13:45,372 INFO L495 AbstractCegarLoop]: Abstraction has 4485 states and 5685 transitions. [2022-12-14 16:13:45,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 38 states have internal predecessors, (92), 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) [2022-12-14 16:13:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 5685 transitions. [2022-12-14 16:13:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3796 [2022-12-14 16:13:45,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:13:45,519 INFO L195 NwaCegarLoop]: trace histogram [880, 880, 880, 880, 40, 40, 40, 40, 40, 40, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:13:45,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-14 16:13:45,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 16:13:46,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 16:13:46,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:13:46,122 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:13:46,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:13:46,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1817958657, now seen corresponding path program 5 times [2022-12-14 16:13:46,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 16:13:46,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92909109] [2022-12-14 16:13:46,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 16:13:46,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 16:13:46,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 16:13:46,137 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 16:13:46,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99aaf176-603a-484a-a512-e334624e9dfb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process