./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b13c7652df725cabbd532da1a8071964fc183988971efb0d5513967afd08dfea --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:55:50,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:55:51,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:55:51,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:55:51,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:55:51,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:55:51,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:55:51,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:55:51,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:55:51,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:55:51,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:55:51,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:55:51,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:55:51,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:55:51,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:55:51,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:55:51,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:55:51,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:55:51,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:55:51,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:55:51,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:55:51,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:55:51,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:55:51,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:55:51,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:55:51,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:55:51,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:55:51,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:55:51,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:55:51,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:55:51,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:55:51,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:55:51,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:55:51,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:55:51,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:55:51,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:55:51,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:55:51,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:55:51,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:55:51,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:55:51,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:55:51,106 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:55:51,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:55:51,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:55:51,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:55:51,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:55:51,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:55:51,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:55:51,149 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:55:51,149 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:55:51,149 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:55:51,150 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:55:51,151 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:55:51,151 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:55:51,151 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:55:51,151 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:55:51,152 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:55:51,152 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:55:51,152 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:55:51,152 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:55:51,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:55:51,153 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:55:51,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:55:51,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:55:51,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:55:51,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:55:51,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:55:51,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:55:51,154 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:55:51,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:55:51,155 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:55:51,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:55:51,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:55:51,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:55:51,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:55:51,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:55:51,156 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:55:51,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:55:51,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:55:51,157 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:55:51,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:55:51,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:55:51,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:55:51,158 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_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b13c7652df725cabbd532da1a8071964fc183988971efb0d5513967afd08dfea [2022-11-25 23:55:51,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:55:51,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:55:51,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:55:51,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:55:51,411 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:55:51,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i [2022-11-25 23:55:54,471 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:55:54,664 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:55:54,665 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i [2022-11-25 23:55:54,671 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/data/bb5610a85/b03c551c8b2146b189656421f46e22ae/FLAG6c9d64056 [2022-11-25 23:55:54,688 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/data/bb5610a85/b03c551c8b2146b189656421f46e22ae [2022-11-25 23:55:54,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:55:54,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:55:54,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:55:54,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:55:54,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:55:54,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:54,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb2e6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54, skipping insertion in model container [2022-11-25 23:55:54,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:54,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:55:54,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:55:54,907 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_be72cc40-58bd-41c1-ae03-efe4c7569074/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i[951,964] [2022-11-25 23:55:54,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:55:54,942 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:55:54,962 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_be72cc40-58bd-41c1-ae03-efe4c7569074/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i[951,964] [2022-11-25 23:55:54,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:55:54,990 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:55:54,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54 WrapperNode [2022-11-25 23:55:54,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:55:54,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:55:54,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:55:54,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:55:55,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,028 INFO L138 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-11-25 23:55:55,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:55:55,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:55:55,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:55:55,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:55:55,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,067 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:55:55,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:55:55,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:55:55,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:55:55,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (1/1) ... [2022-11-25 23:55:55,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:55:55,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:55,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:55:55,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:55:55,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:55:55,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:55:55,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:55:55,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:55:55,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:55:55,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:55:55,253 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:55:55,255 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:55:55,409 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:55:55,458 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:55:55,459 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 23:55:55,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:55:55 BoogieIcfgContainer [2022-11-25 23:55:55,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:55:55,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:55:55,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:55:55,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:55:55,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:55:54" (1/3) ... [2022-11-25 23:55:55,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a37bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:55:55, skipping insertion in model container [2022-11-25 23:55:55,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:55:54" (2/3) ... [2022-11-25 23:55:55,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a37bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:55:55, skipping insertion in model container [2022-11-25 23:55:55,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:55:55" (3/3) ... [2022-11-25 23:55:55,471 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound2.i [2022-11-25 23:55:55,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:55:55,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:55:55,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:55:55,549 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;@3df92e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:55:55,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:55:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:55:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:55:55,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:55,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:55,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:55,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1881233236, now seen corresponding path program 1 times [2022-11-25 23:55:55,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:55,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648824091] [2022-11-25 23:55:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:55,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:55,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:55,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648824091] [2022-11-25 23:55:55,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 23:55:55,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414480878] [2022-11-25 23:55:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:55,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:55,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:55,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:55,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:55:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:55,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 23:55:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:55,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:55,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414480878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:55,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:55:55,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:55:55,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618429283] [2022-11-25 23:55:55,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:55,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:55:55,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:55,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:55:55,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:55:55,906 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:55,965 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-11-25 23:55:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:55:55,968 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:55:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:55,976 INFO L225 Difference]: With dead ends: 27 [2022-11-25 23:55:55,976 INFO L226 Difference]: Without dead ends: 13 [2022-11-25 23:55:55,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:55:55,987 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:55,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:55:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-25 23:55:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-25 23:55:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:55:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-25 23:55:56,018 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-11-25 23:55:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:56,018 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-25 23:55:56,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-25 23:55:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:55:56,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:56,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:56,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:55:56,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 23:55:56,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:56,222 INFO L85 PathProgramCache]: Analyzing trace with hash -515868340, now seen corresponding path program 1 times [2022-11-25 23:55:56,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:56,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909339635] [2022-11-25 23:55:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:56,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:56,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:55:56,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456428573] [2022-11-25 23:55:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:56,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:56,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:56,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:56,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:55:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:55:56,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:56,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:56,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909339635] [2022-11-25 23:55:56,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:55:56,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456428573] [2022-11-25 23:55:56,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456428573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:56,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:55:56,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:55:56,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421847222] [2022-11-25 23:55:56,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:56,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:55:56,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:56,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:55:56,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:55:56,605 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:56,689 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-11-25 23:55:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:55:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:55:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:56,691 INFO L225 Difference]: With dead ends: 25 [2022-11-25 23:55:56,691 INFO L226 Difference]: Without dead ends: 22 [2022-11-25 23:55:56,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:55:56,693 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:56,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:55:56,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-25 23:55:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-25 23:55:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:55:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-25 23:55:56,701 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2022-11-25 23:55:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:56,701 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-25 23:55:56,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-25 23:55:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:55:56,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:56,702 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:56,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:55:56,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:56,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:56,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:56,913 INFO L85 PathProgramCache]: Analyzing trace with hash -965242393, now seen corresponding path program 1 times [2022-11-25 23:55:56,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:56,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100379579] [2022-11-25 23:55:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:56,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:56,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:55:56,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21056772] [2022-11-25 23:55:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:56,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:56,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:56,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:56,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:55:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:57,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:55:57,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:57,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:57,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:57,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100379579] [2022-11-25 23:55:57,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:55:57,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21056772] [2022-11-25 23:55:57,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21056772] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:57,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:55:57,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-11-25 23:55:57,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962085968] [2022-11-25 23:55:57,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:57,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:55:57,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:55:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:55:57,435 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:59,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2022-11-25 23:55:59,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:59,497 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-25 23:55:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:55:59,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:55:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:59,499 INFO L225 Difference]: With dead ends: 32 [2022-11-25 23:55:59,499 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 23:55:59,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:55:59,501 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:59,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 23:55:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 23:55:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-11-25 23:55:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:55:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-25 23:55:59,509 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2022-11-25 23:55:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:59,509 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-25 23:55:59,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:55:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-25 23:55:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:55:59,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:59,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:59,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 23:55:59,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:59,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:55:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:55:59,717 INFO L85 PathProgramCache]: Analyzing trace with hash -969972797, now seen corresponding path program 1 times [2022-11-25 23:55:59,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:55:59,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210567388] [2022-11-25 23:55:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:59,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:55:59,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:55:59,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867757824] [2022-11-25 23:55:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:59,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:59,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:59,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:59,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:55:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:59,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:55:59,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:59,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:55:59,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:59,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210567388] [2022-11-25 23:55:59,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:55:59,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867757824] [2022-11-25 23:55:59,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867757824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:55:59,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:55:59,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:55:59,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048936333] [2022-11-25 23:55:59,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:55:59,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:55:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:55:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:55:59,831 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:55:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:55:59,866 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-25 23:55:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:55:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-25 23:55:59,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:55:59,869 INFO L225 Difference]: With dead ends: 35 [2022-11-25 23:55:59,870 INFO L226 Difference]: Without dead ends: 22 [2022-11-25 23:55:59,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:55:59,877 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:55:59,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:55:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-25 23:55:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-25 23:55:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:55:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-25 23:55:59,896 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-11-25 23:55:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:55:59,897 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-25 23:55:59,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:55:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-25 23:55:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 23:55:59,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:55:59,899 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:55:59,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:00,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:00,104 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:56:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:00,105 INFO L85 PathProgramCache]: Analyzing trace with hash -425494840, now seen corresponding path program 1 times [2022-11-25 23:56:00,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:56:00,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054167132] [2022-11-25 23:56:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:00,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:56:00,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:56:00,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489900584] [2022-11-25 23:56:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:00,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:00,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:00,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:00,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:56:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:00,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:56:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:00,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:56:05,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:56:05,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054167132] [2022-11-25 23:56:05,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:56:05,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489900584] [2022-11-25 23:56:05,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489900584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:05,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1790305569] [2022-11-25 23:56:05,450 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:56:05,451 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:56:05,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:56:05,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:56:05,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:56:07,223 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-25 23:56:07,247 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:56:09,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '564#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:56:09,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:56:09,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:56:09,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-25 23:56:09,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620898168] [2022-11-25 23:56:09,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:56:09,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:56:09,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:56:09,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:56:09,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=388, Unknown=1, NotChecked=0, Total=462 [2022-11-25 23:56:09,037 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:56:20,940 WARN L233 SmtUtils]: Spent 11.32s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:56:23,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:25,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:27,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:35,998 WARN L233 SmtUtils]: Spent 7.84s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:56:39,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:48,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:53,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:55,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:56:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:55,297 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-11-25 23:56:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:56:55,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-25 23:56:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:55,299 INFO L225 Difference]: With dead ends: 59 [2022-11-25 23:56:55,300 INFO L226 Difference]: Without dead ends: 55 [2022-11-25 23:56:55,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=107, Invalid=542, Unknown=1, NotChecked=0, Total=650 [2022-11-25 23:56:55,301 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 21 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:55,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 78 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 132 Invalid, 6 Unknown, 0 Unchecked, 22.1s Time] [2022-11-25 23:56:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-25 23:56:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2022-11-25 23:56:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:56:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-25 23:56:55,337 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 17 [2022-11-25 23:56:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:55,338 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-25 23:56:55,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:56:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-25 23:56:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 23:56:55,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:55,341 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 23:56:55,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:55,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:55,542 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:56:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:55,542 INFO L85 PathProgramCache]: Analyzing trace with hash 687309511, now seen corresponding path program 2 times [2022-11-25 23:56:55,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:56:55,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438497980] [2022-11-25 23:56:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:55,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:56:55,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:56:55,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390157755] [2022-11-25 23:56:55,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:56:55,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:55,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:55,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:55,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:57:01,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:57:01,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:01,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:57:01,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:57:01,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:57:01,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:01,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438497980] [2022-11-25 23:57:01,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:57:01,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390157755] [2022-11-25 23:57:01,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390157755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:01,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593890107] [2022-11-25 23:57:01,704 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:57:01,704 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:57:01,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:57:01,705 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:57:01,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:57:02,852 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-25 23:57:02,869 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:57:03,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:57:03,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:57:03,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:57:03,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-25 23:57:03,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88436334] [2022-11-25 23:57:03,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:57:03,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:57:03,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:03,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:57:03,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:57:03,577 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:57:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:04,513 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-11-25 23:57:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:57:04,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2022-11-25 23:57:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:04,515 INFO L225 Difference]: With dead ends: 64 [2022-11-25 23:57:04,515 INFO L226 Difference]: Without dead ends: 42 [2022-11-25 23:57:04,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:57:04,516 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:04,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 77 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:57:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-25 23:57:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-11-25 23:57:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:57:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-11-25 23:57:04,539 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 24 [2022-11-25 23:57:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:04,539 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-11-25 23:57:04,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:57:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-11-25 23:57:04,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 23:57:04,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:04,544 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:57:04,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:57:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:04,752 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1523523497, now seen corresponding path program 3 times [2022-11-25 23:57:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:04,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735001374] [2022-11-25 23:57:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:04,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:57:04,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102478069] [2022-11-25 23:57:04,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:57:04,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:04,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:04,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:04,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:57:04,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:57:04,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:04,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:57:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:57:04,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:57:04,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735001374] [2022-11-25 23:57:04,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:57:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102478069] [2022-11-25 23:57:04,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102478069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432729186] [2022-11-25 23:57:04,962 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:57:04,962 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:57:04,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:57:04,962 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:57:04,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:57:05,938 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-25 23:57:05,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:57:07,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1173#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:57:07,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:57:07,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:57:07,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-25 23:57:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836659278] [2022-11-25 23:57:07,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:57:07,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:57:07,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:57:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:57:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:57:07,047 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 23:57:07,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:57:07,414 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-11-25 23:57:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:57:07,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-25 23:57:07,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:57:07,415 INFO L225 Difference]: With dead ends: 56 [2022-11-25 23:57:07,415 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 23:57:07,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:57:07,416 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:57:07,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 59 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:57:07,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 23:57:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-11-25 23:57:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 23:57:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-11-25 23:57:07,431 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2022-11-25 23:57:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:57:07,431 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-11-25 23:57:07,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 23:57:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-11-25 23:57:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 23:57:07,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:57:07,433 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-25 23:57:07,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 23:57:07,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:07,638 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:57:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:57:07,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2082994846, now seen corresponding path program 4 times [2022-11-25 23:57:07,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:57:07,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592199987] [2022-11-25 23:57:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:57:07,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:57:07,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:57:07,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33910728] [2022-11-25 23:57:07,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:57:07,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:07,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:07,654 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:07,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:57:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 23:57:07,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:57:08,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:33,909 WARN L233 SmtUtils]: Spent 7.69s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:06,653 WARN L233 SmtUtils]: Spent 12.59s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:58:30,044 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648))) (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse7 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse6 (mod .cse4 4294967296))) (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (let ((.cse5 (div .cse6 2))) (let ((.cse1 (* 2 .cse5)) (.cse2 (* (* .cse5 |c_ULTIMATE.start_main_~q~0#1|) 4))) (let ((.cse3 (* (div (+ (- .cse4) .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse2) 4294967296) 4294967296))) (and (< (+ .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse2) (+ .cse0 .cse3 .cse4 1)) (< (+ .cse0 .cse3 .cse4) (+ .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse2 1)))))) (<= (* 2 .cse4) .cse7) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse7)) (= (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296) .cse6)))) is different from true [2022-11-25 23:59:00,663 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse5 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824))) (let ((.cse6 (mod .cse5 2147483648))) (let ((.cse0 (* .cse6 2)) (.cse3 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse7 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (= (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296) .cse0) (let ((.cse1 (* 4 (* .cse6 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse2 (* (div (+ (* (- 2) .cse5) .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse0) 4294967296) 4294967296)) (.cse4 (* 2 .cse5))) (and (< (+ .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse0) (+ .cse2 .cse3 .cse4 1)) (< (+ .cse2 .cse3 .cse4) (+ .cse1 |c_ULTIMATE.start_main_~r~0#1| .cse0 1))))) (not (<= (* 2 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) .cse7)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~b~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse3)) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse7)) (<= (* .cse5 4) .cse7))))) is different from true [2022-11-25 23:59:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-25 23:59:22,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:59:22,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592199987] [2022-11-25 23:59:22,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:59:22,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33910728] [2022-11-25 23:59:22,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33910728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092064227] [2022-11-25 23:59:22,965 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:59:22,965 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:59:22,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:59:22,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:59:22,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:59:23,738 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-25 23:59:23,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:59:32,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1481#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:59:32,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:59:32,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:59:32,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2022-11-25 23:59:32,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275790127] [2022-11-25 23:59:32,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:59:32,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:59:32,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:59:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:59:32,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=596, Unknown=6, NotChecked=102, Total=812 [2022-11-25 23:59:32,081 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:59:34,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:59:38,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:38,230 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-11-25 23:59:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:59:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2022-11-25 23:59:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:38,231 INFO L225 Difference]: With dead ends: 39 [2022-11-25 23:59:38,231 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 23:59:38,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=122, Invalid=692, Unknown=6, NotChecked=110, Total=930 [2022-11-25 23:59:38,233 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:38,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 1 Unknown, 42 Unchecked, 4.5s Time] [2022-11-25 23:59:38,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 23:59:38,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 23:59:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 23:59:38,234 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2022-11-25 23:59:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:38,234 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 23:59:38,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:59:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 23:59:38,234 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 23:59:38,236 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 23:59:38,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:38,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:38,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-26 00:00:54,242 WARN L233 SmtUtils]: Spent 1.23m on a formula simplification. DAG size of input: 105 DAG size of output: 62 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-26 00:02:33,199 WARN L233 SmtUtils]: Spent 1.64m on a formula simplification. DAG size of input: 105 DAG size of output: 62 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-26 00:02:33,205 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-26 00:02:33,207 INFO L902 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: true [2022-11-26 00:02:33,207 INFO L895 garLoopResultBuilder]: At program point L38-1(lines 38 47) the Hoare annotation is: (= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296)) [2022-11-26 00:02:33,208 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 37) the Hoare annotation is: (let ((.cse4 (mod |ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse0 (<= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) 2)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) .cse2 .cse3) (and .cse0 (<= 1 .cse4) .cse1 .cse2 (= 2 |ULTIMATE.start_main_~b~0#1|) .cse3) (and (<= (* 2 (mod |ULTIMATE.start_main_~B~0#1| 2147483648)) .cse4) .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~b~0#1| (* |ULTIMATE.start_main_~B~0#1| 4)) .cse3))) [2022-11-26 00:02:33,208 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-26 00:02:33,211 INFO L895 garLoopResultBuilder]: At program point L43-2(lines 25 50) the Hoare annotation is: (let ((.cse2 (mod |ULTIMATE.start_main_~A~0#1| 4294967296))) (let ((.cse1 (mod |ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse0 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse5 (* 2 (mod |ULTIMATE.start_main_~B~0#1| 2147483648))) (.cse6 (mod |ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse3 (<= .cse2 2)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= .cse0 .cse1) (= .cse2 (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296))) (and .cse3 (= |ULTIMATE.start_main_~q~0#1| 1) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse4 (= (* 2 (mod |ULTIMATE.start_main_~B~0#1| 1073741824)) |ULTIMATE.start_main_~b~0#1|) (<= .cse5 .cse2)) (let ((.cse9 (div .cse0 2))) (let ((.cse10 (* 2 (* |ULTIMATE.start_main_~q~0#1| .cse9)))) (let ((.cse7 (+ .cse10 |ULTIMATE.start_main_~r~0#1|))) (let ((.cse8 (* (div .cse7 4294967296) 4294967296))) (and (or (<= (* 2 (mod |ULTIMATE.start_main_~b~0#1| 2147483648)) .cse6) (not (<= .cse0 .cse6))) (forall ((|ULTIMATE.start_main_~b~0#1| Int)) (= .cse2 (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296))) (< .cse7 (+ .cse8 .cse2 1)) (= (mod .cse9 4294967296) .cse1) (< (+ .cse8 .cse2) (+ .cse10 |ULTIMATE.start_main_~r~0#1| 1))))))) (and (<= .cse5 .cse6) .cse3 (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~b~0#1| (* |ULTIMATE.start_main_~B~0#1| 4)) .cse4)))) [2022-11-26 00:02:33,215 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse2 (mod |ULTIMATE.start_main_~A~0#1| 4294967296))) (let ((.cse1 (mod |ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse0 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse5 (* 2 (mod |ULTIMATE.start_main_~B~0#1| 2147483648))) (.cse6 (mod |ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse3 (<= .cse2 2)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= .cse0 .cse1) (= .cse2 (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296))) (and .cse3 (= |ULTIMATE.start_main_~q~0#1| 1) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse4 (= (* 2 (mod |ULTIMATE.start_main_~B~0#1| 1073741824)) |ULTIMATE.start_main_~b~0#1|) (<= .cse5 .cse2)) (let ((.cse9 (div .cse0 2))) (let ((.cse10 (* 2 (* |ULTIMATE.start_main_~q~0#1| .cse9)))) (let ((.cse7 (+ .cse10 |ULTIMATE.start_main_~r~0#1|))) (let ((.cse8 (* (div .cse7 4294967296) 4294967296))) (and (or (<= (* 2 (mod |ULTIMATE.start_main_~b~0#1| 2147483648)) .cse6) (not (<= .cse0 .cse6))) (forall ((|ULTIMATE.start_main_~b~0#1| Int)) (= .cse2 (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296))) (< .cse7 (+ .cse8 .cse2 1)) (= (mod .cse9 4294967296) .cse1) (< (+ .cse8 .cse2) (+ .cse10 |ULTIMATE.start_main_~r~0#1| 1))))))) (and (<= .cse5 .cse6) .cse3 (= |ULTIMATE.start_main_~q~0#1| 0) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~b~0#1| (* |ULTIMATE.start_main_~B~0#1| 4)) .cse4)))) [2022-11-26 00:02:33,215 INFO L899 garLoopResultBuilder]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2022-11-26 00:02:33,215 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-11-26 00:02:33,215 INFO L899 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2022-11-26 00:02:33,215 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2022-11-26 00:02:33,216 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2022-11-26 00:02:33,216 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2022-11-26 00:02:33,216 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2022-11-26 00:02:33,216 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2022-11-26 00:02:33,219 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2022-11-26 00:02:33,222 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:02:33,233 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] [2022-11-26 00:02:33,249 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] [2022-11-26 00:02:33,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:02:33 BoogieIcfgContainer [2022-11-26 00:02:33,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:02:33,267 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:02:33,268 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:02:33,268 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:02:33,268 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:55:55" (3/4) ... [2022-11-26 00:02:33,271 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-26 00:02:33,277 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-26 00:02:33,282 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2022-11-26 00:02:33,282 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-26 00:02:33,283 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-26 00:02:33,283 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 00:02:33,322 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:02:33,322 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:02:33,323 INFO L158 Benchmark]: Toolchain (without parser) took 398628.23ms. Allocated memory was 190.8MB in the beginning and 230.7MB in the end (delta: 39.8MB). Free memory was 146.1MB in the beginning and 75.6MB in the end (delta: 70.5MB). Peak memory consumption was 112.3MB. Max. memory is 16.1GB. [2022-11-26 00:02:33,323 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 142.6MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:02:33,324 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.53ms. Allocated memory is still 190.8MB. Free memory was 145.9MB in the beginning and 135.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:02:33,324 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.29ms. Allocated memory is still 190.8MB. Free memory was 135.5MB in the beginning and 133.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:02:33,324 INFO L158 Benchmark]: Boogie Preprocessor took 45.49ms. Allocated memory is still 190.8MB. Free memory was 133.6MB in the beginning and 132.8MB in the end (delta: 865.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:02:33,325 INFO L158 Benchmark]: RCFGBuilder took 386.20ms. Allocated memory is still 190.8MB. Free memory was 132.8MB in the beginning and 119.6MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 00:02:33,325 INFO L158 Benchmark]: TraceAbstraction took 397802.45ms. Allocated memory was 190.8MB in the beginning and 230.7MB in the end (delta: 39.8MB). Free memory was 119.0MB in the beginning and 78.8MB in the end (delta: 40.2MB). Peak memory consumption was 82.9MB. Max. memory is 16.1GB. [2022-11-26 00:02:33,326 INFO L158 Benchmark]: Witness Printer took 54.87ms. Allocated memory is still 230.7MB. Free memory was 77.7MB in the beginning and 75.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:02:33,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 142.6MB. Free memory is still 86.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.53ms. Allocated memory is still 190.8MB. Free memory was 145.9MB in the beginning and 135.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.29ms. Allocated memory is still 190.8MB. Free memory was 135.5MB in the beginning and 133.6MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.49ms. Allocated memory is still 190.8MB. Free memory was 133.6MB in the beginning and 132.8MB in the end (delta: 865.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 386.20ms. Allocated memory is still 190.8MB. Free memory was 132.8MB in the beginning and 119.6MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 397802.45ms. Allocated memory was 190.8MB in the beginning and 230.7MB in the end (delta: 39.8MB). Free memory was 119.0MB in the beginning and 78.8MB in the end (delta: 40.2MB). Peak memory consumption was 82.9MB. Max. memory is 16.1GB. * Witness Printer took 54.87ms. Allocated memory is still 230.7MB. Free memory was 77.7MB in the beginning and 75.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] * 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 - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 397.7s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 56.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 174.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 29.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 62 mSDsluCounter, 364 SdHoareTripleChecker+Invalid, 29.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 42 IncrementalHoareTripleChecker+Unchecked, 257 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 459 IncrementalHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 107 mSDtfsCounter, 459 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 320 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 76.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 32 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 29 PreInvPairs, 54 NumberOfFragments, 460 HoareAnnotationTreeSize, 29 FomulaSimplifications, 90 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 2487 FormulaSimplificationTreeSizeReductionInter, 174.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 141.6s InterpolantComputationTime, 137 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 217 ConstructedInterpolants, 6 QuantifiedInterpolants, 4242 SizeOfPredicates, 27 NumberOfNonLiveVariables, 501 ConjunctsInSsa, 142 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 78/144 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant [2022-11-26 00:02:33,350 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] [2022-11-26 00:02:33,351 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~b~0#1,QUANTIFIED] Derived loop invariant: (((b % 4294967296 == B % 4294967296 && A % 4294967296 == (r + b * q) % 4294967296) || (((((A % 4294967296 <= 2 && q == 1) && b + r == A) && B == 1) && 2 * (B % 1073741824) == b) && 2 * (B % 2147483648) <= A % 4294967296)) || (((((2 * (b % 2147483648) <= r % 4294967296 || !(b % 4294967296 <= r % 4294967296)) && (forall ULTIMATE.start_main_~b~0#1 : int :: A % 4294967296 == (r + ULTIMATE.start_main_~b~0#1 * q) % 4294967296)) && 2 * (q * (b % 4294967296 / 2)) + r < (2 * (q * (b % 4294967296 / 2)) + r) / 4294967296 * 4294967296 + A % 4294967296 + 1) && b % 4294967296 / 2 % 4294967296 == B % 4294967296) && (2 * (q * (b % 4294967296 / 2)) + r) / 4294967296 * 4294967296 + A % 4294967296 < 2 * (q * (b % 4294967296 / 2)) + r + 1)) || (((((2 * (B % 2147483648) <= r % 4294967296 && A % 4294967296 <= 2) && q == 0) && A == r) && b == B * 4) && B == 1) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((A % 4294967296 <= 2 && q == 0) && B == b) && A == r) && B == 1) || (((((A % 4294967296 <= 2 && 1 <= r % 4294967296) && q == 0) && A == r) && 2 == b) && B == 1)) || (((((2 * (B % 2147483648) <= r % 4294967296 && A % 4294967296 <= 2) && q == 0) && A == r) && b == B * 4) && B == 1) - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-26 00:02:33,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be72cc40-58bd-41c1-ae03-efe4c7569074/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE