./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 260fe965b90ef3e416f91a3db2bee0bb860d5ab225efa939b96f89bde803836c --- 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 06:56:45,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:56:46,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:56:46,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:56:46,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:56:46,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:56:46,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:56:46,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:56:46,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:56:46,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:56:46,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:56:46,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:56:46,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:56:46,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:56:46,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:56:46,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:56:46,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:56:46,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:56:46,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:56:46,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:56:46,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:56:46,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:56:46,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:56:46,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:56:46,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:56:46,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:56:46,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:56:46,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:56:46,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:56:46,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:56:46,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:56:46,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:56:46,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:56:46,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:56:46,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:56:46,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:56:46,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:56:46,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:56:46,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:56:46,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:56:46,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:56:46,095 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:56:46,109 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:56:46,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:56:46,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:56:46,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:56:46,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:56:46,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:56:46,110 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:56:46,110 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:56:46,110 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:56:46,111 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:56:46,111 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:56:46,111 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:56:46,111 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:56:46,111 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:56:46,111 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:56:46,111 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:56:46,112 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:56:46,112 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:56:46,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:56:46,112 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:56:46,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:56:46,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:56:46,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:56:46,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:56:46,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:56:46,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:56:46,113 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:56:46,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:56:46,114 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:56:46,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:56:46,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:56:46,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:56:46,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:56:46,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:56:46,115 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:56:46,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:56:46,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:56:46,115 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:56:46,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:56:46,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:56:46,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:56:46,116 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_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260fe965b90ef3e416f91a3db2bee0bb860d5ab225efa939b96f89bde803836c [2022-12-14 06:56:46,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:56:46,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:56:46,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:56:46,300 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:56:46,300 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:56:46,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c [2022-12-14 06:56:48,912 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:56:49,068 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:56:49,068 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c [2022-12-14 06:56:49,074 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/data/6333bd367/7320e5a654b54dd29407fcdfb5f42e86/FLAGe426d7e93 [2022-12-14 06:56:49,091 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/data/6333bd367/7320e5a654b54dd29407fcdfb5f42e86 [2022-12-14 06:56:49,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:56:49,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:56:49,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:56:49,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:56:49,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:56:49,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ef40d54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49, skipping insertion in model container [2022-12-14 06:56:49,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:56:49,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:56:49,244 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_d3c4b515-0578-44cc-b37f-ee7e66aa25de/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c[537,550] [2022-12-14 06:56:49,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:56:49,264 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:56:49,274 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_d3c4b515-0578-44cc-b37f-ee7e66aa25de/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c[537,550] [2022-12-14 06:56:49,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:56:49,288 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:56:49,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49 WrapperNode [2022-12-14 06:56:49,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:56:49,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:56:49,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:56:49,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:56:49,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,313 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-12-14 06:56:49,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:56:49,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:56:49,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:56:49,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:56:49,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,329 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:56:49,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:56:49,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:56:49,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:56:49,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (1/1) ... [2022-12-14 06:56:49,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:56:49,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:49,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:56:49,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:56:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:56:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 06:56:49,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 06:56:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:56:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:56:49,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:56:49,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 06:56:49,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 06:56:49,456 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:56:49,458 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:56:49,588 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:56:49,624 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:56:49,624 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 06:56:49,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:56:49 BoogieIcfgContainer [2022-12-14 06:56:49,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:56:49,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:56:49,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:56:49,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:56:49,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:56:49" (1/3) ... [2022-12-14 06:56:49,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5122ed15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:56:49, skipping insertion in model container [2022-12-14 06:56:49,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:49" (2/3) ... [2022-12-14 06:56:49,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5122ed15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:56:49, skipping insertion in model container [2022-12-14 06:56:49,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:56:49" (3/3) ... [2022-12-14 06:56:49,636 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound2.c [2022-12-14 06:56:49,655 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:56:49,655 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:56:49,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:56:49,703 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;@6408250b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:56:49,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:56:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 06:56:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 06:56:49,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:49,713 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:56:49,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:49,718 INFO L85 PathProgramCache]: Analyzing trace with hash 263857554, now seen corresponding path program 1 times [2022-12-14 06:56:49,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:49,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546568437] [2022-12-14 06:56:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:49,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:49,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:49,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546568437] [2022-12-14 06:56:49,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 06:56:49,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385800371] [2022-12-14 06:56:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:49,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:49,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:49,826 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:56:49,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:56:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:49,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 06:56:49,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:56:49,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:56:49,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385800371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:49,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:56:49,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:56:49,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753283029] [2022-12-14 06:56:49,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:49,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 06:56:49,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 06:56:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:56:49,953 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:56:49,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:49,976 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2022-12-14 06:56:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 06:56:49,978 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2022-12-14 06:56:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:49,984 INFO L225 Difference]: With dead ends: 34 [2022-12-14 06:56:49,984 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 06:56:49,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 06:56:49,988 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:49,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:56:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 06:56:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 06:56:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 06:56:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-12-14 06:56:50,015 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 19 [2022-12-14 06:56:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:50,016 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-12-14 06:56:50,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:56:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-12-14 06:56:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 06:56:50,018 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:50,018 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:56:50,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:56:50,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 06:56:50,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash -999917202, now seen corresponding path program 1 times [2022-12-14 06:56:50,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:50,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935171911] [2022-12-14 06:56:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:50,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:50,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:56:50,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632579559] [2022-12-14 06:56:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:50,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:50,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:50,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:56:50,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:56:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:50,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 06:56:50,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:56:50,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:56:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:56:50,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:50,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935171911] [2022-12-14 06:56:50,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:56:50,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632579559] [2022-12-14 06:56:50,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632579559] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:56:50,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:56:50,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-12-14 06:56:50,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172403901] [2022-12-14 06:56:50,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:50,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:56:50,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:50,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:56:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:56:50,614 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:56:52,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 06:56:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:52,698 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2022-12-14 06:56:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:56:52,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2022-12-14 06:56:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:52,700 INFO L225 Difference]: With dead ends: 30 [2022-12-14 06:56:52,700 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 06:56:52,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:56:52,702 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:56:52,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 06:56:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 06:56:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 06:56:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 06:56:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-12-14 06:56:52,710 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2022-12-14 06:56:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:52,711 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-12-14 06:56:52,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:56:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-12-14 06:56:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 06:56:52,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:52,712 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:56:52,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:56:52,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:52,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1224321740, now seen corresponding path program 1 times [2022-12-14 06:56:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:52,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647070210] [2022-12-14 06:56:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:52,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:52,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:56:52,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029387830] [2022-12-14 06:56:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:52,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:52,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:52,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:56:52,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:56:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2022-12-14 06:56:53,139 WARN L124 FreeRefinementEngine]: Strategy SIFA_TAIPAN was unsuccessful and could not determine trace feasibility [2022-12-14 06:56:53,140 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2022-12-14 06:56:53,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 06:56:53,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:56:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:56:53,357 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 06:56:53,368 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 06:56:53,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 06:56:53 BoogieIcfgContainer [2022-12-14 06:56:53,395 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 06:56:53,396 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 06:56:53,396 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 06:56:53,396 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 06:56:53,396 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:56:49" (3/4) ... [2022-12-14 06:56:53,399 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 06:56:53,399 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 06:56:53,400 INFO L158 Benchmark]: Toolchain (without parser) took 4304.91ms. Allocated memory is still 201.3MB. Free memory was 140.0MB in the beginning and 123.2MB in the end (delta: 16.8MB). Peak memory consumption was 17.3MB. Max. memory is 16.1GB. [2022-12-14 06:56:53,400 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:56:53,400 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.46ms. Allocated memory is still 201.3MB. Free memory was 139.8MB in the beginning and 129.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 06:56:53,401 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.67ms. Allocated memory is still 201.3MB. Free memory was 129.2MB in the beginning and 127.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 06:56:53,401 INFO L158 Benchmark]: Boogie Preprocessor took 17.05ms. Allocated memory is still 201.3MB. Free memory was 127.6MB in the beginning and 126.7MB in the end (delta: 916.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:56:53,401 INFO L158 Benchmark]: RCFGBuilder took 295.01ms. Allocated memory is still 201.3MB. Free memory was 126.5MB in the beginning and 166.3MB in the end (delta: -39.8MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2022-12-14 06:56:53,402 INFO L158 Benchmark]: TraceAbstraction took 3765.62ms. Allocated memory is still 201.3MB. Free memory was 165.7MB in the beginning and 123.8MB in the end (delta: 42.0MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. [2022-12-14 06:56:53,402 INFO L158 Benchmark]: Witness Printer took 3.41ms. Allocated memory is still 201.3MB. Free memory was 123.8MB in the beginning and 123.2MB in the end (delta: 583.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 06:56:53,405 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory is still 66.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 192.46ms. Allocated memory is still 201.3MB. Free memory was 139.8MB in the beginning and 129.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.67ms. Allocated memory is still 201.3MB. Free memory was 129.2MB in the beginning and 127.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.05ms. Allocated memory is still 201.3MB. Free memory was 127.6MB in the beginning and 126.7MB in the end (delta: 916.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 295.01ms. Allocated memory is still 201.3MB. Free memory was 126.5MB in the beginning and 166.3MB in the end (delta: -39.8MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. * TraceAbstraction took 3765.62ms. Allocated memory is still 201.3MB. Free memory was 165.7MB in the beginning and 123.8MB in the end (delta: 42.0MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. * Witness Printer took 3.41ms. Allocated memory is still 201.3MB. Free memory was 123.8MB in the beginning and 123.2MB in the end (delta: 583.8kB). 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: 14]: 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: [L19] int counter = 0; [L21] unsigned a, b; [L22] unsigned x, y, u, v; [L23] a = __VERIFIER_nondet_uint() [L24] b = __VERIFIER_nondet_uint() [L25] CALL assume_abort_if_not(a >= 1) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(a >= 1) [L26] CALL assume_abort_if_not(b >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(b >= 1) [L28] CALL assume_abort_if_not(a <= 65535) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(a <= 65535) [L29] CALL assume_abort_if_not(b <= 65535) [L9] COND FALSE !(!cond) [L29] RET assume_abort_if_not(b <= 65535) [L31] x = a [L32] y = b [L33] u = b [L34] v = a [L36] EXPR counter++ [L36] COND TRUE counter++<2 [L37] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(x*u + y*v == 2*a*b) [L39] COND FALSE !(!(x != y)) [L42] COND TRUE x > y [L43] x = x - y [L44] v = v + u [L36] EXPR counter++ [L36] COND TRUE counter++<2 [L37] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.7s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 82 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 42 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 40 IncrementalHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 40 mSDtfsCounter, 40 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=2, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 176 SizeOfPredicates, 2 NumberOfNonLiveVariables, 186 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 35/36 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: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 06:56:53,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 260fe965b90ef3e416f91a3db2bee0bb860d5ab225efa939b96f89bde803836c --- 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 06:56:55,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:56:55,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:56:55,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:56:55,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:56:55,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:56:55,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:56:55,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:56:55,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:56:55,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:56:55,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:56:55,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:56:55,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:56:55,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:56:55,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:56:55,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:56:55,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:56:55,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:56:55,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:56:55,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:56:55,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:56:55,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:56:55,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:56:55,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:56:55,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:56:55,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:56:55,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:56:55,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:56:55,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:56:55,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:56:55,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:56:55,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:56:55,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:56:55,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:56:55,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:56:55,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:56:55,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:56:55,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:56:55,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:56:55,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:56:55,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:56:55,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 06:56:55,110 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:56:55,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:56:55,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:56:55,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:56:55,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:56:55,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:56:55,112 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:56:55,112 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:56:55,112 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:56:55,112 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:56:55,112 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:56:55,113 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:56:55,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:56:55,114 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:56:55,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:56:55,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:56:55,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:56:55,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:56:55,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:56:55,115 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 06:56:55,115 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 06:56:55,115 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 06:56:55,115 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:56:55,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:56:55,116 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:56:55,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:56:55,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:56:55,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 06:56:55,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:56:55,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:56:55,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:56:55,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:56:55,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:56:55,117 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 06:56:55,118 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 06:56:55,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:56:55,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:56:55,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 06:56:55,118 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_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260fe965b90ef3e416f91a3db2bee0bb860d5ab225efa939b96f89bde803836c [2022-12-14 06:56:55,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:56:55,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:56:55,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:56:55,369 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:56:55,369 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:56:55,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c [2022-12-14 06:56:58,051 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:56:58,169 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:56:58,170 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c [2022-12-14 06:56:58,180 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/data/ed88dd9d2/4773c39f9249490491659ba6c5574c9a/FLAG8c85eeaa4 [2022-12-14 06:56:58,191 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/data/ed88dd9d2/4773c39f9249490491659ba6c5574c9a [2022-12-14 06:56:58,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:56:58,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:56:58,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:56:58,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:56:58,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:56:58,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@417a7e5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58, skipping insertion in model container [2022-12-14 06:56:58,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:56:58,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:56:58,353 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_d3c4b515-0578-44cc-b37f-ee7e66aa25de/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c[537,550] [2022-12-14 06:56:58,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:56:58,374 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:56:58,384 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_d3c4b515-0578-44cc-b37f-ee7e66aa25de/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c[537,550] [2022-12-14 06:56:58,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:56:58,399 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:56:58,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58 WrapperNode [2022-12-14 06:56:58,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:56:58,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:56:58,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:56:58,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:56:58,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,426 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-12-14 06:56:58,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:56:58,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:56:58,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:56:58,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:56:58,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,442 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:56:58,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:56:58,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:56:58,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:56:58,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:56:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:58,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:56:58,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:56:58,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:56:58,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 06:56:58,507 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 06:56:58,507 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 06:56:58,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:56:58,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:56:58,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 06:56:58,508 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 06:56:58,563 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:56:58,565 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:56:58,688 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:56:58,693 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:56:58,693 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 06:56:58,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:56:58 BoogieIcfgContainer [2022-12-14 06:56:58,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:56:58,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:56:58,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:56:58,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:56:58,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:56:58" (1/3) ... [2022-12-14 06:56:58,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce3b607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:56:58, skipping insertion in model container [2022-12-14 06:56:58,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (2/3) ... [2022-12-14 06:56:58,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce3b607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:56:58, skipping insertion in model container [2022-12-14 06:56:58,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:56:58" (3/3) ... [2022-12-14 06:56:58,701 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound2.c [2022-12-14 06:56:58,716 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:56:58,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:56:58,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:56:58,757 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;@6702129, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:56:58,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:56:58,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 06:56:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 06:56:58,768 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:58,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:56:58,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:58,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1908356592, now seen corresponding path program 1 times [2022-12-14 06:56:58,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:56:58,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451932336] [2022-12-14 06:56:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:58,784 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 06:56:58,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:56:58,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:56:58,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:56:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:58,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 06:56:58,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:56:58,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:56:58,929 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:56:58,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451932336] [2022-12-14 06:56:58,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451932336] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:58,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:56:58,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:56:58,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429131561] [2022-12-14 06:56:58,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:58,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 06:56:58,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:56:58,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 06:56:58,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:56:58,967 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:56:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:56:58,988 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2022-12-14 06:56:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 06:56:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-12-14 06:56:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:56:58,996 INFO L225 Difference]: With dead ends: 51 [2022-12-14 06:56:58,997 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 06:56:58,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 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 06:56:59,003 INFO L413 NwaCegarLoop]: 33 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, 33 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 06:56:59,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:56:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 06:56:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 06:56:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 06:56:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-12-14 06:56:59,029 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 28 [2022-12-14 06:56:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:56:59,029 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-12-14 06:56:59,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:56:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-12-14 06:56:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 06:56:59,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:59,030 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:56:59,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:56:59,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:56:59,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:59,235 INFO L85 PathProgramCache]: Analyzing trace with hash 384922192, now seen corresponding path program 1 times [2022-12-14 06:56:59,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:56:59,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781320505] [2022-12-14 06:56:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:59,237 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 06:56:59,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:56:59,241 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:56:59,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:56:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:59,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:56:59,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:56:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:56:59,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:56:59,580 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:56:59,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781320505] [2022-12-14 06:56:59,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781320505] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:59,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:56:59,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:56:59,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069993556] [2022-12-14 06:56:59,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:59,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:56:59,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:56:59,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:56:59,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:56:59,583 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:57:01,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:57:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:01,863 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-12-14 06:57:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:57:01,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-12-14 06:57:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:01,866 INFO L225 Difference]: With dead ends: 35 [2022-12-14 06:57:01,866 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 06:57:01,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:01,867 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:01,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 06:57:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 06:57:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-12-14 06:57:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 06:57:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-12-14 06:57:01,875 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 29 [2022-12-14 06:57:01,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:01,876 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-12-14 06:57:01,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:57:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-12-14 06:57:01,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 06:57:01,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:01,877 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:01,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:57:02,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:57:02,080 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:02,082 INFO L85 PathProgramCache]: Analyzing trace with hash 383134732, now seen corresponding path program 1 times [2022-12-14 06:57:02,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:57:02,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671827526] [2022-12-14 06:57:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:02,084 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 06:57:02,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:57:02,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:57:02,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:57:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:02,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:57:02,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:57:02,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:57:02,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:57:02,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671827526] [2022-12-14 06:57:02,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671827526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:02,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:57:02,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:57:02,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863005228] [2022-12-14 06:57:02,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:02,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:57:02,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:57:02,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:57:02,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:57:02,242 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:57:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:02,259 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-12-14 06:57:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:57:02,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-12-14 06:57:02,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:02,261 INFO L225 Difference]: With dead ends: 37 [2022-12-14 06:57:02,262 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 06:57:02,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:57:02,263 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:02,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:57:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 06:57:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 06:57:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 06:57:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-12-14 06:57:02,271 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 29 [2022-12-14 06:57:02,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:02,271 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-12-14 06:57:02,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 06:57:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-12-14 06:57:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 06:57:02,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:02,273 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:02,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:57:02,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:57:02,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:02,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:02,477 INFO L85 PathProgramCache]: Analyzing trace with hash -296587984, now seen corresponding path program 1 times [2022-12-14 06:57:02,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:57:02,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816024820] [2022-12-14 06:57:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:02,480 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 06:57:02,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:57:02,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:57:02,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:57:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:02,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:57:02,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:57:03,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:57:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:57:04,442 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:57:04,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816024820] [2022-12-14 06:57:04,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816024820] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:57:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [303814940] [2022-12-14 06:57:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:04,443 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:57:04,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:57:04,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:57:04,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 06:57:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:04,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:57:04,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:57:04,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:57:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:57:05,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [303814940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:57:05,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028934326] [2022-12-14 06:57:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:05,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:05,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:57:05,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:57:05,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:57:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:05,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:57:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:57:05,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:57:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:57:06,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028934326] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:57:06,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:57:06,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 9 [2022-12-14 06:57:06,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378976156] [2022-12-14 06:57:06,723 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:57:06,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:57:06,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:57:06,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:57:06,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:57:06,725 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 06:57:09,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:57:11,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:57:11,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:11,975 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-12-14 06:57:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:57:11,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 35 [2022-12-14 06:57:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:11,982 INFO L225 Difference]: With dead ends: 37 [2022-12-14 06:57:11,982 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 06:57:11,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:57:11,983 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:11,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 108 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2022-12-14 06:57:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 06:57:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 06:57:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 06:57:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-12-14 06:57:11,989 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 35 [2022-12-14 06:57:11,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:11,989 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-12-14 06:57:11,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 06:57:11,989 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-12-14 06:57:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 06:57:11,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:11,991 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:11,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:57:12,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:57:12,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-12-14 06:57:12,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:57:12,593 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:12,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:12,595 INFO L85 PathProgramCache]: Analyzing trace with hash -449676311, now seen corresponding path program 1 times [2022-12-14 06:57:12,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:57:12,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000319108] [2022-12-14 06:57:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:12,596 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 06:57:12,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:57:12,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 06:57:12,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c4b515-0578-44cc-b37f-ee7e66aa25de/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 (8)] Waiting until timeout for monitored process