./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/eureka_05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/eureka_05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl --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 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:02:34,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:02:34,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:02:35,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:02:35,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:02:35,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:02:35,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:02:35,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:02:35,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:02:35,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:02:35,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:02:35,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:02:35,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:02:35,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:02:35,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:02:35,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:02:35,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:02:35,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:02:35,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:02:35,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:02:35,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:02:35,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:02:35,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:02:35,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:02:35,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:02:35,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:02:35,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:02:35,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:02:35,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:02:35,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:02:35,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:02:35,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:02:35,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:02:35,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:02:35,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:02:35,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:02:35,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:02:35,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:02:35,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:02:35,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:02:35,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:02:35,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:02:35,154 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:02:35,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:02:35,155 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:02:35,155 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:02:35,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:02:35,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:02:35,163 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:02:35,163 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:02:35,164 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:02:35,164 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:02:35,165 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:02:35,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:02:35,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:02:35,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:02:35,166 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:02:35,166 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:02:35,166 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:02:35,167 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:02:35,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:02:35,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:02:35,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:02:35,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:02:35,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:02:35,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:02:35,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:02:35,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:02:35,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:02:35,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:02:35,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:02:35,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:02:35,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:02:35,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:02:35,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:02:35,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:02:35,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:02:35,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:02:35,173 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:02:35,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:02:35,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:02:35,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:02:35,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:02:35,174 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab [2021-11-23 17:02:35,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:02:35,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:02:35,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:02:35,508 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:02:35,509 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:02:35,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loops/eureka_05.i [2021-11-23 17:02:35,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/data/bc1387115/2fb67496d69e45d4bcb7aafae3e51d55/FLAG083bd1bdc [2021-11-23 17:02:36,074 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:02:36,075 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/sv-benchmarks/c/loops/eureka_05.i [2021-11-23 17:02:36,086 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/data/bc1387115/2fb67496d69e45d4bcb7aafae3e51d55/FLAG083bd1bdc [2021-11-23 17:02:36,573 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/data/bc1387115/2fb67496d69e45d4bcb7aafae3e51d55 [2021-11-23 17:02:36,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:02:36,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:02:36,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:02:36,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:02:36,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:02:36,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc78167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36, skipping insertion in model container [2021-11-23 17:02:36,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:02:36,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:02:36,743 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/sv-benchmarks/c/loops/eureka_05.i[810,823] [2021-11-23 17:02:36,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:02:36,770 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:02:36,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/sv-benchmarks/c/loops/eureka_05.i[810,823] [2021-11-23 17:02:36,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:02:36,805 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:02:36,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36 WrapperNode [2021-11-23 17:02:36,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:02:36,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:02:36,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:02:36,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:02:36,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,844 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2021-11-23 17:02:36,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:02:36,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:02:36,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:02:36,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:02:36,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:02:36,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:02:36,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:02:36,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:02:36,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:36" (1/1) ... [2021-11-23 17:02:36,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:02:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:02:36,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:02:36,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:02:36,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:02:36,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:02:36,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:02:36,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:02:36,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:02:36,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:02:36,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:02:36,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:02:37,058 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:02:37,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:02:37,256 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:02:37,277 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:02:37,282 INFO L158 Benchmark]: Toolchain (without parser) took 703.72ms. Allocated memory is still 94.4MB. Free memory was 57.2MB in the beginning and 67.5MB in the end (delta: -10.2MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2021-11-23 17:02:37,282 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 94.4MB. Free memory is still 73.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:02:37,284 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.19ms. Allocated memory is still 94.4MB. Free memory was 57.0MB in the beginning and 46.9MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:02:37,285 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.37ms. Allocated memory is still 94.4MB. Free memory was 46.9MB in the beginning and 45.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:02:37,286 INFO L158 Benchmark]: Boogie Preprocessor took 26.80ms. Allocated memory is still 94.4MB. Free memory was 45.3MB in the beginning and 44.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:02:37,287 INFO L158 Benchmark]: RCFGBuilder took 406.78ms. Allocated memory is still 94.4MB. Free memory was 44.0MB in the beginning and 67.5MB in the end (delta: -23.5MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2021-11-23 17:02:37,292 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 94.4MB. Free memory is still 73.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.19ms. Allocated memory is still 94.4MB. Free memory was 57.0MB in the beginning and 46.9MB in the end (delta: 10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.37ms. Allocated memory is still 94.4MB. Free memory was 46.9MB in the beginning and 45.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.80ms. Allocated memory is still 94.4MB. Free memory was 45.3MB in the beginning and 44.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 406.78ms. Allocated memory is still 94.4MB. Free memory was 44.0MB in the beginning and 67.5MB in the end (delta: -23.5MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:02:37,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/eureka_05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl --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 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:02:39,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:02:39,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:02:39,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:02:39,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:02:39,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:02:39,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:02:39,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:02:39,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:02:39,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:02:39,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:02:39,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:02:39,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:02:39,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:02:39,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:02:39,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:02:39,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:02:39,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:02:39,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:02:39,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:02:39,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:02:39,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:02:39,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:02:39,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:02:39,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:02:39,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:02:39,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:02:39,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:02:39,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:02:39,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:02:39,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:02:39,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:02:39,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:02:39,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:02:39,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:02:39,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:02:39,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:02:39,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:02:39,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:02:39,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:02:39,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:02:39,999 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:02:40,043 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:02:40,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:02:40,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:02:40,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:02:40,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:02:40,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:02:40,046 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:02:40,046 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:02:40,047 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:02:40,047 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:02:40,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:02:40,048 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:02:40,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:02:40,050 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:02:40,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:02:40,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:02:40,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:02:40,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:02:40,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:02:40,052 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:02:40,052 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:02:40,052 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:02:40,053 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:02:40,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:02:40,053 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:02:40,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:02:40,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:02:40,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:02:40,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:02:40,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:02:40,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:02:40,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:02:40,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:02:40,056 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:02:40,056 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:40,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:02:40,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:02:40,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:02:40,057 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab [2021-11-23 17:02:40,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:02:40,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:02:40,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:02:40,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:02:40,533 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:02:40,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/loops/eureka_05.i [2021-11-23 17:02:40,623 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/data/d87295fb0/d71c054bb2b448739aef6a55dde5c5c1/FLAG38bed54dc [2021-11-23 17:02:41,212 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:02:41,213 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/sv-benchmarks/c/loops/eureka_05.i [2021-11-23 17:02:41,222 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/data/d87295fb0/d71c054bb2b448739aef6a55dde5c5c1/FLAG38bed54dc [2021-11-23 17:02:41,537 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/data/d87295fb0/d71c054bb2b448739aef6a55dde5c5c1 [2021-11-23 17:02:41,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:02:41,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:02:41,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:02:41,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:02:41,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:02:41,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:41,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29df44ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41, skipping insertion in model container [2021-11-23 17:02:41,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:41,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:02:41,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:02:41,781 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/sv-benchmarks/c/loops/eureka_05.i[810,823] [2021-11-23 17:02:41,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:02:41,825 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:02:41,842 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/sv-benchmarks/c/loops/eureka_05.i[810,823] [2021-11-23 17:02:41,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:02:41,888 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:02:41,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41 WrapperNode [2021-11-23 17:02:41,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:02:41,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:02:41,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:02:41,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:02:41,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:41,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:41,938 INFO L137 Inliner]: procedures = 19, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2021-11-23 17:02:41,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:02:41,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:02:41,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:02:41,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:02:41,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:41,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:41,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:41,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:41,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:41,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:41,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:42,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:02:42,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:02:42,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:02:42,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:02:42,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (1/1) ... [2021-11-23 17:02:42,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:02:42,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:02:42,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:02:42,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:02:42,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:02:42,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:02:42,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-23 17:02:42,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:02:42,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:02:42,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:02:42,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:02:42,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:02:42,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:02:42,195 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:02:42,197 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:02:42,378 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:02:42,384 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:02:42,384 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 17:02:42,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:02:42 BoogieIcfgContainer [2021-11-23 17:02:42,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:02:42,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:02:42,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:02:42,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:02:42,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:02:41" (1/3) ... [2021-11-23 17:02:42,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a83a3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:02:42, skipping insertion in model container [2021-11-23 17:02:42,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:02:41" (2/3) ... [2021-11-23 17:02:42,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a83a3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:02:42, skipping insertion in model container [2021-11-23 17:02:42,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:02:42" (3/3) ... [2021-11-23 17:02:42,395 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2021-11-23 17:02:42,401 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:02:42,402 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:02:42,472 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:02:42,480 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:02:42,480 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:02:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 17:02:42,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:42,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:42,537 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2015864939, now seen corresponding path program 1 times [2021-11-23 17:02:42,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:42,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918782617] [2021-11-23 17:02:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:42,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:42,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:42,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:42,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:02:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:42,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:02:42,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:42,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:42,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:42,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918782617] [2021-11-23 17:02:42,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918782617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:42,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:42,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:02:42,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493304093] [2021-11-23 17:02:42,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:42,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:42,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:42,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:02:42,923 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:42,979 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-23 17:02:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:02:42,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 17:02:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:42,992 INFO L225 Difference]: With dead ends: 42 [2021-11-23 17:02:42,992 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 17:02:42,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:02:43,002 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:43,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:02:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 17:02:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-23 17:02:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-23 17:02:43,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-11-23 17:02:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:43,047 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-23 17:02:43,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-23 17:02:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:02:43,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:43,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:43,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:43,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:43,261 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:43,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1565230291, now seen corresponding path program 1 times [2021-11-23 17:02:43,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:43,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121346046] [2021-11-23 17:02:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:43,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:43,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:43,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:43,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:02:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:43,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:02:43,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:43,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:43,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:43,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121346046] [2021-11-23 17:02:43,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121346046] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:43,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [561049734] [2021-11-23 17:02:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:43,417 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:43,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:02:43,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:02:43,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 17:02:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:43,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:02:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:43,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:43,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [561049734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101765744] [2021-11-23 17:02:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:43,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:02:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:02:43,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:02:43,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 17:02:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:43,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:02:43,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:43,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:43,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101765744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:43,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:02:43,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 7 [2021-11-23 17:02:43,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729803991] [2021-11-23 17:02:43,858 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:02:43,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:02:43,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:43,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:02:43,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:02:43,861 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:43,991 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-23 17:02:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:02:43,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:02:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:43,994 INFO L225 Difference]: With dead ends: 57 [2021-11-23 17:02:43,994 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 17:02:43,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:02:43,998 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:43,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 75 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:02:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 17:02:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2021-11-23 17:02:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-23 17:02:44,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-11-23 17:02:44,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:44,020 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-23 17:02:44,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-23 17:02:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 17:02:44,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:44,024 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:44,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:44,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:02:44,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 17:02:44,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:02:44,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:44,633 INFO L85 PathProgramCache]: Analyzing trace with hash -7962739, now seen corresponding path program 2 times [2021-11-23 17:02:44,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:44,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193380010] [2021-11-23 17:02:44,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:02:44,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:44,651 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:44,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:02:44,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 17:02:44,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:02:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:02:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:02:44,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:44,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:44,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193380010] [2021-11-23 17:02:44,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193380010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:44,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:44,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:02:44,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945691183] [2021-11-23 17:02:44,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:44,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:02:44,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:02:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:02:44,824 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:44,862 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-11-23 17:02:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:02:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 17:02:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:44,864 INFO L225 Difference]: With dead ends: 38 [2021-11-23 17:02:44,864 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 17:02:44,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:02:44,866 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:44,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 30 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:02:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 17:02:44,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-23 17:02:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-23 17:02:44,874 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-11-23 17:02:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:44,874 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-23 17:02:44,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-23 17:02:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 17:02:44,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:44,876 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:44,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:45,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:45,088 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1148715813, now seen corresponding path program 1 times [2021-11-23 17:02:45,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:45,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421838885] [2021-11-23 17:02:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:45,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:45,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:45,090 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:45,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:02:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:45,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:02:45,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:02:45,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:02:45,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:45,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421838885] [2021-11-23 17:02:45,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421838885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:45,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1628024716] [2021-11-23 17:02:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:45,401 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:45,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:02:45,402 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:02:45,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:02:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:45,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:02:45,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:02:45,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:02:45,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1628024716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:45,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473716053] [2021-11-23 17:02:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:45,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:02:45,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:02:45,637 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:02:45,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:02:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:45,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:02:45,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:02:45,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:02:46,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473716053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:46,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:02:46,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 16 [2021-11-23 17:02:46,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961133762] [2021-11-23 17:02:46,050 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:02:46,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:02:46,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:02:46,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:02:46,053 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:46,538 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-11-23 17:02:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 17:02:46,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 17:02:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:46,541 INFO L225 Difference]: With dead ends: 78 [2021-11-23 17:02:46,541 INFO L226 Difference]: Without dead ends: 63 [2021-11-23 17:02:46,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-11-23 17:02:46,543 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 152 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:46,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 180 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:02:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-23 17:02:46,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2021-11-23 17:02:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 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) [2021-11-23 17:02:46,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-23 17:02:46,555 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 21 [2021-11-23 17:02:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:46,555 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-23 17:02:46,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:02:46,555 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-23 17:02:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 17:02:46,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:46,557 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:46,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:46,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:46,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:47,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:47,169 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:47,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1363886947, now seen corresponding path program 2 times [2021-11-23 17:02:47,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:47,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755547022] [2021-11-23 17:02:47,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:02:47,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:47,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:47,172 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:47,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:02:47,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:02:47,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:02:47,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:02:47,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 17:02:47,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:47,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:47,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755547022] [2021-11-23 17:02:47,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755547022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:47,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:47,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:02:47,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893067697] [2021-11-23 17:02:47,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:47,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:02:47,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:47,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:02:47,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:02:47,336 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-23 17:02:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:47,408 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2021-11-23 17:02:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:02:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 17:02:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:47,410 INFO L225 Difference]: With dead ends: 59 [2021-11-23 17:02:47,410 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 17:02:47,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:02:47,412 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:47,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 40 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:02:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 17:02:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-11-23 17:02:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 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) [2021-11-23 17:02:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-23 17:02:47,421 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 23 [2021-11-23 17:02:47,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:47,421 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-23 17:02:47,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-11-23 17:02:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-23 17:02:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 17:02:47,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:47,423 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:47,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:47,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:47,631 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1046967233, now seen corresponding path program 1 times [2021-11-23 17:02:47,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126376700] [2021-11-23 17:02:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:47,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:47,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:47,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:47,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:02:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:02:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 17:02:47,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 17:02:47,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126376700] [2021-11-23 17:02:47,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126376700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [45725196] [2021-11-23 17:02:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:47,939 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:47,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:02:47,947 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:02:47,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:02:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:48,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:02:48,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 17:02:48,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 17:02:48,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [45725196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:48,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576040033] [2021-11-23 17:02:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:48,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:02:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:02:48,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:02:48,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 17:02:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:48,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:02:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:02:48,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 17:02:48,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576040033] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:48,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:02:48,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 13 [2021-11-23 17:02:48,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042727886] [2021-11-23 17:02:48,591 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:02:48,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 17:02:48,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:48,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 17:02:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:02:48,593 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2021-11-23 17:02:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:49,166 INFO L93 Difference]: Finished difference Result 97 states and 132 transitions. [2021-11-23 17:02:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 17:02:49,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 17:02:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:49,170 INFO L225 Difference]: With dead ends: 97 [2021-11-23 17:02:49,170 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 17:02:49,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-11-23 17:02:49,172 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 188 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:49,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 82 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:02:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 17:02:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-23 17:02:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 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) [2021-11-23 17:02:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2021-11-23 17:02:49,196 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 26 [2021-11-23 17:02:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:49,197 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2021-11-23 17:02:49,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2021-11-23 17:02:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2021-11-23 17:02:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 17:02:49,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:49,200 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:02:49,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:49,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 17:02:49,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:49,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:49,817 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:49,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:49,818 INFO L85 PathProgramCache]: Analyzing trace with hash 96032675, now seen corresponding path program 2 times [2021-11-23 17:02:49,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:49,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479392587] [2021-11-23 17:02:49,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:02:49,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:49,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:49,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:49,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:02:50,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:02:50,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:02:50,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:02:50,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:50,255 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:02:50,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 17:02:50,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:02:50,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:02:50,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:02:50,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:02:50,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:02:50,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 17:02:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-23 17:02:50,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:51,112 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_155 (Array (_ BitVec 32) (_ BitVec 32)))) (not (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| v_ArrVal_155) |c_~#array~0.base|))) (bvslt (select .cse0 (bvadd |c_~#array~0.offset| (_ bv4 32))) (select .cse0 |c_~#array~0.offset|))))) is different from false [2021-11-23 17:02:51,247 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_155 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_~#array~1#1.base_16| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~#array~1#1.base_16|))))) (not (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_main_~#array~1#1.base_16| v_ArrVal_155) |c_~#array~0.base|))) (bvslt (select .cse0 (bvadd |c_~#array~0.offset| (_ bv4 32))) (select .cse0 |c_~#array~0.offset|)))))) is different from false [2021-11-23 17:02:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 9 not checked. [2021-11-23 17:02:51,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479392587] [2021-11-23 17:02:51,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479392587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:51,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [789461134] [2021-11-23 17:02:51,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:02:51,267 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:51,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:02:51,275 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:02:51,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:02:51,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:02:51,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:02:51,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:02:51,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:51,717 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:02:51,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 17:02:51,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:02:51,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:02:51,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:02:51,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:02:51,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:02:52,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 17:02:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-23 17:02:52,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:52,293 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_187 (Array (_ BitVec 32) (_ BitVec 32)))) (not (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| v_ArrVal_187) |c_~#array~0.base|))) (bvslt (select .cse0 (bvadd |c_~#array~0.offset| (_ bv4 32))) (select .cse0 |c_~#array~0.offset|))))) is different from false [2021-11-23 17:02:52,392 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_187 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_~#array~1#1.base_17| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~#array~1#1.base_17|))) (not (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_main_~#array~1#1.base_17| v_ArrVal_187) |c_~#array~0.base|))) (bvslt (select .cse0 (bvadd |c_~#array~0.offset| (_ bv4 32))) (select .cse0 |c_~#array~0.offset|)))))) is different from false [2021-11-23 17:02:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 9 not checked. [2021-11-23 17:02:52,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [789461134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:52,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658627538] [2021-11-23 17:02:52,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:02:52,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:02:52,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:02:52,399 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:02:52,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:02:52,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:02:52,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:02:52,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:02:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:52,618 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:02:52,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 17:02:52,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:02:53,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:02:53,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:02:53,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:02:53,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:02:53,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:02:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-23 17:02:54,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:54,210 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_221 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_221) |c_ULTIMATE.start_main_~#array~1#1.base|) |c_ULTIMATE.start_main_~#array~1#1.offset|))) is different from false [2021-11-23 17:02:54,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:02:54,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2021-11-23 17:02:54,703 INFO L354 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2021-11-23 17:02:54,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2021-11-23 17:02:54,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-23 17:02:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 221 trivial. 9 not checked. [2021-11-23 17:02:55,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658627538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:55,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:02:55,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 13, 13] total 39 [2021-11-23 17:02:55,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168467178] [2021-11-23 17:02:55,453 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:02:55,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 17:02:55,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 17:02:55,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1031, Unknown=5, NotChecked=350, Total=1560 [2021-11-23 17:02:55,456 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 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) [2021-11-23 17:02:59,390 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (bvsge (bvadd |c_ULTIMATE.start_main_~i~1#1| (_ bv4294967293 32)) (_ bv0 32))) (.cse1 (bvsge (bvadd |c_ULTIMATE.start_main_~i~1#1| (_ bv4294967294 32)) (_ bv0 32))) (.cse0 (not (= |c_ULTIMATE.start_main_~#array~1#1.base| |c_~#array~0.base|))) (.cse3 (bvsge (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_main_~i~1#1|) (_ bv0 32))) (.cse5 (bvsge (bvadd (_ bv4294967295 32) |c_ULTIMATE.start_main_~i~1#1|) (_ bv0 32))) (.cse4 (forall ((v_ArrVal_221 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_221) |c_ULTIMATE.start_main_~#array~1#1.base|) |c_ULTIMATE.start_main_~#array~1#1.offset|))))) (and (or .cse0 (not .cse1) .cse2) (or .cse0 .cse3 (not .cse2)) .cse4 (or .cse0 (not .cse5) .cse1) (or .cse0 (bvsge (bvadd (_ bv4294967291 32) |c_ULTIMATE.start_main_~i~1#1|) (_ bv0 32)) (not .cse3)) (= (_ bv0 32) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) |c_ULTIMATE.start_main_~#array~1#1.offset|)) (or .cse5 .cse4))) is different from false [2021-11-23 17:02:59,849 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (bvsge (bvadd |c_ULTIMATE.start_main_~i~1#1| (_ bv4294967293 32)) (_ bv0 32))) (.cse1 (bvsge (bvadd |c_ULTIMATE.start_main_~i~1#1| (_ bv4294967294 32)) (_ bv0 32))) (.cse0 (not (= |c_ULTIMATE.start_main_~#array~1#1.base| |c_~#array~0.base|))) (.cse3 (bvsge (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_main_~i~1#1|) (_ bv0 32))) (.cse5 (bvsge (bvadd (_ bv4294967295 32) |c_ULTIMATE.start_main_~i~1#1|) (_ bv0 32))) (.cse4 (forall ((v_ArrVal_221 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_221) |c_ULTIMATE.start_main_~#array~1#1.base|) |c_ULTIMATE.start_main_~#array~1#1.offset|))))) (and (or .cse0 (not .cse1) .cse2) (or .cse0 .cse3 (not .cse2)) (or (bvsge |c_ULTIMATE.start_main_~i~1#1| (_ bv0 32)) .cse4) (or .cse0 (not .cse5) .cse1) (or .cse0 (bvsge (bvadd (_ bv4294967291 32) |c_ULTIMATE.start_main_~i~1#1|) (_ bv0 32)) (not .cse3)) (= (_ bv0 32) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) |c_ULTIMATE.start_main_~#array~1#1.offset|)) (or .cse5 .cse4))) is different from false [2021-11-23 17:03:01,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:01,179 INFO L93 Difference]: Finished difference Result 340 states and 418 transitions. [2021-11-23 17:03:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 17:03:01,180 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-23 17:03:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:01,184 INFO L225 Difference]: With dead ends: 340 [2021-11-23 17:03:01,184 INFO L226 Difference]: Without dead ends: 283 [2021-11-23 17:03:01,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 379 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1066, Invalid=4942, Unknown=26, NotChecked=1106, Total=7140 [2021-11-23 17:03:01,189 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 381 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:01,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 590 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 426 Invalid, 0 Unknown, 418 Unchecked, 0.8s Time] [2021-11-23 17:03:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-23 17:03:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 175. [2021-11-23 17:03:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.264367816091954) internal successors, (220), 174 states have internal predecessors, (220), 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) [2021-11-23 17:03:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 220 transitions. [2021-11-23 17:03:01,228 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 220 transitions. Word has length 69 [2021-11-23 17:03:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:01,229 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 220 transitions. [2021-11-23 17:03:01,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 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) [2021-11-23 17:03:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 220 transitions. [2021-11-23 17:03:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 17:03:01,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:01,233 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:01,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:01,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:01,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:01,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:01,851 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1470867525, now seen corresponding path program 1 times [2021-11-23 17:03:01,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:01,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105474458] [2021-11-23 17:03:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:01,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:01,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:01,854 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:01,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:03:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:03:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:02,211 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:03:02,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 17:03:02,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:03:02,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:03:02,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:03:02,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:03:02,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:03:02,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 17:03:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 17:03:02,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:03,068 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_253 (Array (_ BitVec 32) (_ BitVec 32)))) (not (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| v_ArrVal_253) |c_~#array~0.base|))) (bvslt (select .cse0 (bvadd |c_~#array~0.offset| (_ bv8 32))) (select .cse0 |c_~#array~0.offset|))))) is different from false [2021-11-23 17:03:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 190 trivial. 9 not checked. [2021-11-23 17:03:03,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:03,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105474458] [2021-11-23 17:03:03,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105474458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:03,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [747226812] [2021-11-23 17:03:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:03,229 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:03:03,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:03:03,235 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:03:03,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 17:03:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:03,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 17:03:03,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:04,896 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:03:04,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 17:03:04,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:03:04,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:03:05,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:03:05,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:03:05,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-23 17:03:05,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:05,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:05,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:03:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:05,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 42 [2021-11-23 17:03:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 117 proven. 74 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 17:03:07,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 124 proven. 58 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-23 17:03:10,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [747226812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:10,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062140015] [2021-11-23 17:03:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:10,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:03:10,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:03:10,371 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:03:10,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 17:03:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:10,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-23 17:03:10,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:12,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:12,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:03:12,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 17:03:12,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 39 [2021-11-23 17:03:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 90 proven. 102 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 17:03:13,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 125 proven. 22 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:03:26,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062140015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:03:26,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:03:26,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 21, 18, 19, 19] total 84 [2021-11-23 17:03:26,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601775432] [2021-11-23 17:03:26,518 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:03:26,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-23 17:03:26,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-23 17:03:26,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=727, Invalid=6078, Unknown=5, NotChecked=162, Total=6972 [2021-11-23 17:03:26,523 INFO L87 Difference]: Start difference. First operand 175 states and 220 transitions. Second operand has 84 states, 84 states have (on average 1.9523809523809523) internal successors, (164), 84 states have internal predecessors, (164), 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) [2021-11-23 17:03:52,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:04:04,363 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:04:22,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:04:22,658 INFO L93 Difference]: Finished difference Result 655 states and 884 transitions. [2021-11-23 17:04:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-23 17:04:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9523809523809523) internal successors, (164), 84 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-23 17:04:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:04:22,663 INFO L225 Difference]: With dead ends: 655 [2021-11-23 17:04:22,664 INFO L226 Difference]: Without dead ends: 517 [2021-11-23 17:04:22,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 357 SyntacticMatches, 5 SemanticMatches, 158 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8522 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=2632, Invalid=22489, Unknown=5, NotChecked=314, Total=25440 [2021-11-23 17:04:22,673 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 289 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 186 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1534 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:04:22,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 863 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 909 Invalid, 1 Unknown, 1534 Unchecked, 4.1s Time] [2021-11-23 17:04:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-23 17:04:22,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 433. [2021-11-23 17:04:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.3634259259259258) internal successors, (589), 432 states have internal predecessors, (589), 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) [2021-11-23 17:04:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 589 transitions. [2021-11-23 17:04:22,764 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 589 transitions. Word has length 73 [2021-11-23 17:04:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:04:22,765 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 589 transitions. [2021-11-23 17:04:22,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9523809523809523) internal successors, (164), 84 states have internal predecessors, (164), 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) [2021-11-23 17:04:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 589 transitions. [2021-11-23 17:04:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 17:04:22,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:04:22,771 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:04:22,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:23,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:23,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:04:23,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:04:23,376 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:04:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:04:23,376 INFO L85 PathProgramCache]: Analyzing trace with hash 861968569, now seen corresponding path program 2 times [2021-11-23 17:04:23,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:04:23,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429652775] [2021-11-23 17:04:23,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:04:23,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:04:23,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:04:23,379 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:04:23,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:04:23,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:04:23,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:04:23,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 17:04:23,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:23,726 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:04:23,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 17:04:23,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:23,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:23,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:24,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:24,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:24,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 17:04:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 17:04:24,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:25,053 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_366 (Array (_ BitVec 32) (_ BitVec 32)))) (not (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| v_ArrVal_366) |c_~#array~0.base|))) (bvslt (select .cse0 (bvadd |c_~#array~0.offset| (_ bv12 32))) (select .cse0 |c_~#array~0.offset|))))) is different from false [2021-11-23 17:04:25,123 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_366 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_~#array~1#1.base_20| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~#array~1#1.base_20|))) (not (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_main_~#array~1#1.base_20| v_ArrVal_366) |c_~#array~0.base|))) (bvslt (select .cse0 (bvadd |c_~#array~0.offset| (_ bv12 32))) (select .cse0 |c_~#array~0.offset|)))))) is different from false [2021-11-23 17:04:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 163 trivial. 9 not checked. [2021-11-23 17:04:25,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:25,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429652775] [2021-11-23 17:04:25,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429652775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:25,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1792228886] [2021-11-23 17:04:25,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:04:25,126 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:25,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:04:25,127 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:04:25,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:04:25,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:04:25,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:04:25,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:04:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:25,483 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:04:25,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 17:04:25,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:25,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:25,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:25,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:25,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:25,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 17:04:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-23 17:04:26,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:26,240 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_399 (Array (_ BitVec 32) (_ BitVec 32)))) (not (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| v_ArrVal_399) |c_~#array~0.base|))) (bvslt (select .cse0 (bvadd |c_~#array~0.offset| (_ bv12 32))) (select .cse0 |c_~#array~0.offset|))))) is different from false [2021-11-23 17:04:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 163 trivial. 9 not checked. [2021-11-23 17:04:30,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1792228886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:30,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045642352] [2021-11-23 17:04:30,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:04:30,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:04:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:04:30,449 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:04:30,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 17:04:30,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:04:30,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:04:30,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:04:30,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:30,683 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:04:30,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 17:04:30,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:30,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:30,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:30,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:30,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:04:32,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:04:32,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:04:32,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:04:32,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:04:32,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:04:32,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-23 17:04:33,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:04:33,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:04:33,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:04:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:04:33,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 42 [2021-11-23 17:04:33,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 17:04:33,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:04:33,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-11-23 17:04:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 90 proven. 133 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 17:04:34,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 79 proven. 148 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 17:04:58,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045642352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:58,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:04:58,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9, 9, 26, 30] total 78 [2021-11-23 17:04:58,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399534566] [2021-11-23 17:04:58,104 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:04:58,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-23 17:04:58,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-23 17:04:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=4983, Unknown=13, NotChecked=450, Total=6162 [2021-11-23 17:04:58,108 INFO L87 Difference]: Start difference. First operand 433 states and 589 transitions. Second operand has 79 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:05:42,662 WARN L227 SmtUtils]: Spent 10.36s on a formula simplification. DAG size of input: 45 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:08:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:08:50,934 INFO L93 Difference]: Finished difference Result 1437 states and 1973 transitions. [2021-11-23 17:08:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-11-23 17:08:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-23 17:08:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:08:50,942 INFO L225 Difference]: With dead ends: 1437 [2021-11-23 17:08:50,942 INFO L226 Difference]: Without dead ends: 1047 [2021-11-23 17:08:50,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 11657 ImplicationChecksByTransitivity, 260.7s TimeCoverageRelationStatistics Valid=4818, Invalid=30662, Unknown=64, NotChecked=1128, Total=36672 [2021-11-23 17:08:50,952 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 276 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2432 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:08:50,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 553 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 849 Invalid, 0 Unknown, 2432 Unchecked, 1.3s Time] [2021-11-23 17:08:50,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-11-23 17:08:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 785. [2021-11-23 17:08:51,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 1.3813775510204083) internal successors, (1083), 784 states have internal predecessors, (1083), 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) [2021-11-23 17:08:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1083 transitions. [2021-11-23 17:08:51,089 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1083 transitions. Word has length 73 [2021-11-23 17:08:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:08:51,089 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 1083 transitions. [2021-11-23 17:08:51,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:08:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1083 transitions. [2021-11-23 17:08:51,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 17:08:51,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:08:51,094 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:08:51,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:51,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:51,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:08:51,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:08:51,709 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:08:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:08:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash 968075775, now seen corresponding path program 3 times [2021-11-23 17:08:51,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:08:51,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426594685] [2021-11-23 17:08:51,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:08:51,710 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:08:51,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:08:51,731 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:08:51,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:08:52,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-23 17:08:52,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:08:52,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 17:08:52,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:08:52,342 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:08:52,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 17:08:52,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:08:52,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:08:52,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:08:52,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:08:52,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 17:08:53,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 17:08:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 24 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 17:08:53,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:08:55,138 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_SelectionSort_~lh~0#1_85| (_ BitVec 32))) (or (bvslt (bvadd |v_ULTIMATE.start_SelectionSort_~lh~0#1_85| (_ bv4 32)) c_~n~0) (not (bvslt (bvadd |v_ULTIMATE.start_SelectionSort_~lh~0#1_85| (_ bv3 32)) c_~n~0)))) (forall ((v_ArrVal_469 (Array (_ BitVec 32) (_ BitVec 32)))) (not (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| v_ArrVal_469) |c_~#array~0.base|))) (bvslt (select .cse0 (bvadd (_ bv16 32) |c_~#array~0.offset|)) (select .cse0 |c_~#array~0.offset|)))))) is different from false [2021-11-23 17:08:55,384 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_SelectionSort_~lh~0#1_85| (_ BitVec 32))) (or (bvslt (bvadd |v_ULTIMATE.start_SelectionSort_~lh~0#1_85| (_ bv4 32)) c_~n~0) (not (bvslt (bvadd |v_ULTIMATE.start_SelectionSort_~lh~0#1_85| (_ bv3 32)) c_~n~0)))) (forall ((|v_ULTIMATE.start_main_~#array~1#1.base_23| (_ BitVec 32)) (v_ArrVal_469 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (let ((.cse0 (select (store |c_#memory_int| |v_ULTIMATE.start_main_~#array~1#1.base_23| v_ArrVal_469) |c_~#array~0.base|))) (bvslt (select .cse0 (bvadd (_ bv16 32) |c_~#array~0.offset|)) (select .cse0 |c_~#array~0.offset|)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~#array~1#1.base_23|)))))) is different from false [2021-11-23 17:08:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 120 proven. 77 refuted. 0 times theorem prover too weak. 51 trivial. 9 not checked. [2021-11-23 17:08:55,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:08:55,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426594685] [2021-11-23 17:08:55,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426594685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:08:55,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [999678107] [2021-11-23 17:08:55,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:08:55,393 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:08:55,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:08:55,395 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:08:55,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 17:08:56,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-23 17:08:56,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:08:57,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-23 17:08:57,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:09:01,710 INFO L354 Elim1Store]: treesize reduction 327, result has 9.9 percent of original size [2021-11-23 17:09:01,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 58 [2021-11-23 17:09:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 108 proven. 94 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 17:09:02,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:31,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 332 treesize of output 284 [2021-11-23 17:10:36,464 INFO L354 Elim1Store]: treesize reduction 437, result has 9.7 percent of original size [2021-11-23 17:10:36,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 39176 treesize of output 28131 [2021-11-23 17:10:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 114 proven. 93 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 17:10:44,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [999678107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:10:44,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960964304] [2021-11-23 17:10:44,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:10:44,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:10:44,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:10:44,172 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:10:44,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a156cac1-f3e4-4132-8950-1e411622f7e7/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 17:10:45,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-23 17:10:45,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:10:45,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 17:10:45,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:10:46,403 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 17:10:46,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 17:10:48,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 17:10:49,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 17:10:49,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 17:10:50,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 17:10:51,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 17:10:51,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 17:10:51,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 17:10:51,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 17:10:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-23 17:10:54,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:10:57,136 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_543 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_543) |c_ULTIMATE.start_main_~#array~1#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array~1#1.offset|)) (_ bv1 32))) is different from false [2021-11-23 17:11:00,548 INFO L354 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2021-11-23 17:11:00,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2021-11-23 17:11:00,579 INFO L354 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2021-11-23 17:11:00,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-23 17:11:00,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 17:11:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 221 trivial. 9 not checked. [2021-11-23 17:11:03,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960964304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:11:03,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:11:03,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 21, 33, 15, 16] total 106 [2021-11-23 17:11:03,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452347760] [2021-11-23 17:11:03,831 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:11:03,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-23 17:11:03,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:11:03,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-23 17:11:03,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=9282, Unknown=37, NotChecked=612, Total=11130 [2021-11-23 17:11:03,834 INFO L87 Difference]: Start difference. First operand 785 states and 1083 transitions. Second operand has 106 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 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) [2021-11-23 17:11:04,128 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse35 (bvmul |c_ULTIMATE.start_SelectionSort_~i~0#1| (_ bv4 32))) (.cse42 (bvmul |c_ULTIMATE.start_SelectionSort_~lh~0#1| (_ bv4 32)))) (let ((.cse21 (bvadd |c_~#array~0.offset| .cse42)) (.cse44 (bvadd |c_~#array~0.offset| .cse35)) (.cse8 (select |c_#memory_int| |c_~#array~0.base|)) (.cse43 (bvadd |c_~#array~0.offset| (_ bv4 32) .cse35))) (let ((.cse31 (select .cse8 .cse43)) (.cse37 (select .cse8 .cse44)) (.cse19 (select .cse8 .cse21)) (.cse41 (bvadd |c_~#array~0.offset| (bvmul |c_ULTIMATE.start_SelectionSort_~rh~0#1| (_ bv4 32))))) (let ((.cse32 (select .cse8 .cse41)) (.cse40 (store (store .cse8 .cse21 .cse37) .cse44 .cse19)) (.cse5 (bvadd |c_~#array~0.offset| (_ bv4 32) .cse42)) (.cse33 (store (store .cse8 .cse21 .cse31) .cse43 .cse19)) (.cse6 (bvadd |c_~#array~0.offset| (_ bv8 32) .cse42))) (let ((.cse14 (bvslt (bvadd (_ bv2 32) |c_ULTIMATE.start_SelectionSort_~i~0#1|) c_~n~0)) (.cse34 (select .cse33 .cse6)) (.cse15 (bvslt (bvadd |c_ULTIMATE.start_SelectionSort_~lh~0#1| (_ bv3 32)) c_~n~0)) (.cse20 (bvslt (bvadd |c_ULTIMATE.start_SelectionSort_~lh~0#1| (_ bv2 32)) c_~n~0)) (.cse39 (select .cse40 .cse5)) (.cse3 (bvadd |c_~#array~0.offset| .cse42 (_ bv12 32))) (.cse38 (select .cse40 .cse6)) (.cse9 (select .cse8 .cse6)) (.cse10 (select .cse8 .cse5)) (.cse2 (store (store .cse8 .cse21 .cse32) .cse41 .cse19))) (let ((.cse4 (select .cse2 .cse6)) (.cse7 (select .cse2 .cse5)) (.cse22 (bvslt .cse9 .cse10)) (.cse23 (bvslt (select .cse40 .cse3) .cse38)) (.cse25 (not (bvslt (select (store (store .cse40 .cse5 .cse38) .cse6 .cse39) .cse3) .cse39))) (.cse17 (not (bvslt |c_ULTIMATE.start_SelectionSort_#t~mem3#1| |c_ULTIMATE.start_SelectionSort_#t~mem4#1|))) (.cse12 (not (bvslt (bvadd |c_ULTIMATE.start_SelectionSort_~i~0#1| (_ bv1 32)) c_~n~0))) (.cse24 (not (bvslt .cse37 .cse32))) (.cse13 (not (bvslt .cse38 .cse39))) (.cse16 (bvslt .cse31 .cse37)) (.cse18 (not .cse20)) (.cse0 (not .cse15)) (.cse1 (bvslt (bvadd |c_ULTIMATE.start_SelectionSort_~lh~0#1| (_ bv4 32)) c_~n~0)) (.cse26 (not (let ((.cse36 (select .cse33 .cse5))) (bvslt (select (store (store .cse33 .cse5 .cse34) .cse6 .cse36) .cse3) .cse36)))) (.cse27 (bvslt (bvadd (_ bv3 32) |c_ULTIMATE.start_SelectionSort_~i~0#1|) c_~n~0)) (.cse28 (bvslt (select .cse8 (bvadd |c_~#array~0.offset| (_ bv8 32) .cse35)) .cse31)) (.cse29 (not .cse14)) (.cse30 (bvslt (select .cse33 .cse3) .cse34))) (and (or .cse0 .cse1 (bvslt (select .cse2 .cse3) .cse4) (not (bvslt (select (store (store .cse2 .cse5 .cse4) .cse6 .cse7) .cse3) .cse7))) (= (select .cse8 |c_~#array~0.offset|) (_ bv0 32)) (or .cse0 .cse1 (not (bvslt (select (store (store .cse8 .cse5 .cse9) .cse6 .cse10) .cse3) .cse10)) (bvslt (select .cse8 .cse3) .cse9)) (or (forall ((|v_ULTIMATE.start_SelectionSort_~lh~0#1_85| (_ BitVec 32))) (or (bvslt (bvadd |v_ULTIMATE.start_SelectionSort_~lh~0#1_85| (_ bv4 32)) c_~n~0) (not (bvslt (bvadd |v_ULTIMATE.start_SelectionSort_~lh~0#1_85| (_ bv3 32)) c_~n~0)))) (forall ((|v_ULTIMATE.start_main_~#array~1#1.base_23| (_ BitVec 32)) (v_ArrVal_469 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (let ((.cse11 (select (store |c_#memory_int| |v_ULTIMATE.start_main_~#array~1#1.base_23| v_ArrVal_469) |c_~#array~0.base|))) (bvslt (select .cse11 (bvadd (_ bv16 32) |c_~#array~0.offset|)) (select .cse11 |c_~#array~0.offset|)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_~#array~1#1.base_23|)))))) (or .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18) (or (not (bvslt .cse10 .cse19)) .cse20 (not (bvslt (bvadd |c_ULTIMATE.start_SelectionSort_~lh~0#1| (_ bv1 32)) c_~n~0))) (= c_~n~0 (_ bv5 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| (_ bv3 32)))) (_ bv1 1))) (or (not (bvslt (select (store (store .cse8 .cse21 .cse10) .cse5 .cse19) .cse6) .cse19)) .cse15 .cse22 .cse18) (= |c_~#array~0.base| (_ bv3 32)) (or .cse0 .cse1 .cse12 .cse23 .cse24 .cse25 .cse14 .cse16) (= (select .cse8 (bvadd (_ bv16 32) |c_~#array~0.offset|)) (_ bv0 32)) (or (not (bvslt .cse4 .cse7)) .cse15 .cse18) (or (not .cse22) .cse15 .cse18) (or .cse0 .cse1 .cse12 .cse23 .cse25 .cse14 .cse16 .cse17) (= |c_~#array~0.offset| (_ bv0 32)) (or .cse0 .cse1 .cse26 .cse27 .cse28 .cse29 (not .cse16) .cse30 .cse17) (or .cse12 .cse24 .cse13 .cse14 .cse15 .cse16 .cse18) (or .cse0 .cse1 .cse26 .cse27 .cse28 .cse29 .cse30 (not (bvslt .cse31 .cse32)))))))))) is different from false [2021-11-23 17:11:42,005 WARN L227 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 117 DAG size of output: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:12:59,554 WARN L227 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 114 DAG size of output: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:13:01,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:10,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:54,389 WARN L227 SmtUtils]: Spent 38.91s on a formula simplification. DAG size of input: 108 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:15:13,246 WARN L227 SmtUtils]: Spent 1.17m on a formula simplification. DAG size of input: 126 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:15:15,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:15:24,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:15:32,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:15:46,949 WARN L227 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 102 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:16:14,775 WARN L227 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 102 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)