./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label05.c --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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/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 db95babf73fb1944c5f5cbb1a7fc98d0691e2dd292f8f012fa0cfbffe032486e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:38:22,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:38:22,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:38:23,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:38:23,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:38:23,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:38:23,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:38:23,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:38:23,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:38:23,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:38:23,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:38:23,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:38:23,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:38:23,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:38:23,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:38:23,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:38:23,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:38:23,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:38:23,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:38:23,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:38:23,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:38:23,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:38:23,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:38:23,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:38:23,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:38:23,095 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:38:23,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:38:23,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:38:23,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:38:23,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:38:23,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:38:23,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:38:23,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:38:23,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:38:23,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:38:23,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:38:23,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:38:23,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:38:23,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:38:23,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:38:23,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:38:23,113 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:38:23,170 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:38:23,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:38:23,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:38:23,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:38:23,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:38:23,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:38:23,173 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:38:23,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:38:23,174 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:38:23,174 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:38:23,175 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:38:23,176 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:38:23,176 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:38:23,176 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:38:23,176 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:38:23,177 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:38:23,177 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:38:23,177 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:38:23,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:38:23,179 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:38:23,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:38:23,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:38:23,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:38:23,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:38:23,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:38:23,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:38:23,183 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:38:23,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:38:23,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:38:23,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:38:23,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:38:23,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:38:23,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:38:23,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:38:23,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:38:23,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:38:23,186 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:38:23,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:38:23,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:38:23,186 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:38:23,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:38:23,187 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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db95babf73fb1944c5f5cbb1a7fc98d0691e2dd292f8f012fa0cfbffe032486e [2021-11-23 17:38:23,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:38:23,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:38:23,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:38:23,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:38:23,556 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:38:23,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2021-11-23 17:38:23,660 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/data/efa71b682/c565b020ecec4cc18f1d1a006fd29d04/FLAG43e69aab8 [2021-11-23 17:38:24,723 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:38:24,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2021-11-23 17:38:24,780 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/data/efa71b682/c565b020ecec4cc18f1d1a006fd29d04/FLAG43e69aab8 [2021-11-23 17:38:25,074 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/data/efa71b682/c565b020ecec4cc18f1d1a006fd29d04 [2021-11-23 17:38:25,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:38:25,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:38:25,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:38:25,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:38:25,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:38:25,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:38:25" (1/1) ... [2021-11-23 17:38:25,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18980d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:25, skipping insertion in model container [2021-11-23 17:38:25,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:38:25" (1/1) ... [2021-11-23 17:38:25,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:38:25,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:38:25,652 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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/sv-benchmarks/c/eca-rers2012/Problem13_label05.c[6050,6063] [2021-11-23 17:38:27,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:38:27,230 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:38:27,280 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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/sv-benchmarks/c/eca-rers2012/Problem13_label05.c[6050,6063] [2021-11-23 17:38:28,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:38:28,187 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:38:28,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28 WrapperNode [2021-11-23 17:38:28,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:38:28,189 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:38:28,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:38:28,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:38:28,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28" (1/1) ... [2021-11-23 17:38:28,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28" (1/1) ... [2021-11-23 17:38:29,180 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-23 17:38:29,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:38:29,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:38:29,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:38:29,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:38:29,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28" (1/1) ... [2021-11-23 17:38:29,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28" (1/1) ... [2021-11-23 17:38:29,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28" (1/1) ... [2021-11-23 17:38:29,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28" (1/1) ... [2021-11-23 17:38:29,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28" (1/1) ... [2021-11-23 17:38:29,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28" (1/1) ... [2021-11-23 17:38:30,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28" (1/1) ... [2021-11-23 17:38:30,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:38:30,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:38:30,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:38:30,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:38:30,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:28" (1/1) ... [2021-11-23 17:38:30,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:38:30,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:30,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:38:30,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:38:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:38:30,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:38:30,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:38:30,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:38:30,385 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:38:30,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:38:36,782 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:38:36,947 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 17:38:36,954 INFO L158 Benchmark]: Toolchain (without parser) took 11873.23ms. Allocated memory was 96.5MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 66.7MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 328.0MB. Max. memory is 16.1GB. [2021-11-23 17:38:36,956 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 96.5MB. Free memory was 50.7MB in the beginning and 50.6MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:38:36,958 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3108.37ms. Allocated memory was 96.5MB in the beginning and 207.6MB in the end (delta: 111.1MB). Free memory was 66.3MB in the beginning and 127.3MB in the end (delta: -61.0MB). Peak memory consumption was 81.3MB. Max. memory is 16.1GB. [2021-11-23 17:38:36,959 INFO L158 Benchmark]: Boogie Procedure Inliner took 995.78ms. Allocated memory was 207.6MB in the beginning and 415.2MB in the end (delta: 207.6MB). Free memory was 127.3MB in the beginning and 280.5MB in the end (delta: -153.2MB). Peak memory consumption was 97.6MB. Max. memory is 16.1GB. [2021-11-23 17:38:36,961 INFO L158 Benchmark]: Boogie Preprocessor took 913.24ms. Allocated memory is still 415.2MB. Free memory was 280.5MB in the beginning and 252.1MB in the end (delta: 28.4MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2021-11-23 17:38:36,962 INFO L158 Benchmark]: RCFGBuilder took 6850.24ms. Allocated memory was 415.2MB in the beginning and 1.4GB in the end (delta: 1.0GB). Free memory was 251.9MB in the beginning and 1.2GB in the end (delta: -991.8MB). Peak memory consumption was 197.4MB. Max. memory is 16.1GB. [2021-11-23 17:38:36,974 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 96.5MB. Free memory was 50.7MB in the beginning and 50.6MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3108.37ms. Allocated memory was 96.5MB in the beginning and 207.6MB in the end (delta: 111.1MB). Free memory was 66.3MB in the beginning and 127.3MB in the end (delta: -61.0MB). Peak memory consumption was 81.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 995.78ms. Allocated memory was 207.6MB in the beginning and 415.2MB in the end (delta: 207.6MB). Free memory was 127.3MB in the beginning and 280.5MB in the end (delta: -153.2MB). Peak memory consumption was 97.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 913.24ms. Allocated memory is still 415.2MB. Free memory was 280.5MB in the beginning and 252.1MB in the end (delta: 28.4MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * RCFGBuilder took 6850.24ms. Allocated memory was 415.2MB in the beginning and 1.4GB in the end (delta: 1.0GB). Free memory was 251.9MB in the beginning and 1.2GB in the end (delta: -991.8MB). Peak memory consumption was 197.4MB. 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 17:38:37,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally 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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/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 db95babf73fb1944c5f5cbb1a7fc98d0691e2dd292f8f012fa0cfbffe032486e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:38:39,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:38:39,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:38:39,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:38:39,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:38:39,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:38:39,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:38:39,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:38:39,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:38:39,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:38:39,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:38:39,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:38:39,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:38:39,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:38:39,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:38:39,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:38:39,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:38:39,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:38:39,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:38:39,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:38:39,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:38:39,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:38:39,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:38:39,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:38:39,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:38:39,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:38:39,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:38:39,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:38:39,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:38:39,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:38:39,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:38:39,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:38:39,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:38:39,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:38:39,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:38:39,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:38:39,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:38:39,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:38:39,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:38:39,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:38:39,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:38:39,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:38:39,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:38:39,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:38:39,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:38:39,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:38:40,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:38:40,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:38:40,001 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:38:40,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:38:40,001 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:38:40,002 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:38:40,002 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:38:40,002 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:38:40,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:38:40,003 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:38:40,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:38:40,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:38:40,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:38:40,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:38:40,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:38:40,005 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:38:40,005 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:38:40,005 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:38:40,005 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:38:40,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:38:40,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:38:40,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:38:40,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:38:40,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:38:40,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:38:40,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:38:40,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:38:40,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:38:40,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:38:40,009 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:38:40,009 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:40,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:38:40,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:38:40,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:38:40,010 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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db95babf73fb1944c5f5cbb1a7fc98d0691e2dd292f8f012fa0cfbffe032486e [2021-11-23 17:38:40,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:38:40,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:38:40,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:38:40,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:38:40,593 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:38:40,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2021-11-23 17:38:40,695 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/data/cd0f209c9/4bb51e6acc8a4aca84b52be5b2a46577/FLAGc4d522248 [2021-11-23 17:38:41,857 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:38:41,858 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/sv-benchmarks/c/eca-rers2012/Problem13_label05.c [2021-11-23 17:38:41,905 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/data/cd0f209c9/4bb51e6acc8a4aca84b52be5b2a46577/FLAGc4d522248 [2021-11-23 17:38:42,268 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/data/cd0f209c9/4bb51e6acc8a4aca84b52be5b2a46577 [2021-11-23 17:38:42,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:38:42,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:38:42,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:38:42,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:38:42,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:38:42,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:38:42" (1/1) ... [2021-11-23 17:38:42,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba658e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:42, skipping insertion in model container [2021-11-23 17:38:42,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:38:42" (1/1) ... [2021-11-23 17:38:42,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:38:42,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:38:42,844 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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/sv-benchmarks/c/eca-rers2012/Problem13_label05.c[6050,6063] [2021-11-23 17:38:44,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:38:44,288 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:38:44,334 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_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/sv-benchmarks/c/eca-rers2012/Problem13_label05.c[6050,6063] [2021-11-23 17:38:45,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:38:45,267 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:38:45,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45 WrapperNode [2021-11-23 17:38:45,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:38:45,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:38:45,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:38:45,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:38:45,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (1/1) ... [2021-11-23 17:38:45,380 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (1/1) ... [2021-11-23 17:38:45,694 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5578 [2021-11-23 17:38:45,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:38:45,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:38:45,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:38:45,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:38:45,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (1/1) ... [2021-11-23 17:38:45,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (1/1) ... [2021-11-23 17:38:45,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (1/1) ... [2021-11-23 17:38:45,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (1/1) ... [2021-11-23 17:38:46,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (1/1) ... [2021-11-23 17:38:46,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (1/1) ... [2021-11-23 17:38:46,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (1/1) ... [2021-11-23 17:38:46,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:38:46,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:38:46,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:38:46,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:38:46,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (1/1) ... [2021-11-23 17:38:46,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:38:46,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:46,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:38:46,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:38:46,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:38:46,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:38:46,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:38:46,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:38:46,443 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:38:46,445 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:39:41,862 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:39:41,895 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:39:41,896 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:39:41,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:39:41 BoogieIcfgContainer [2021-11-23 17:39:41,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:39:41,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:39:41,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:39:41,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:39:41,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:38:42" (1/3) ... [2021-11-23 17:39:41,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d82f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:39:41, skipping insertion in model container [2021-11-23 17:39:41,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:45" (2/3) ... [2021-11-23 17:39:41,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d82f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:39:41, skipping insertion in model container [2021-11-23 17:39:41,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:39:41" (3/3) ... [2021-11-23 17:39:41,912 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label05.c [2021-11-23 17:39:41,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:39:41,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:39:41,989 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:39:41,998 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 17:39:41,998 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:39:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 17:39:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 17:39:42,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:42,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:39:42,079 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:42,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:42,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1824112922, now seen corresponding path program 1 times [2021-11-23 17:39:42,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:42,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403404291] [2021-11-23 17:39:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:42,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:42,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:42,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:42,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:39:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:42,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:39:42,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:42,586 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 17:39:42,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:42,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:42,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403404291] [2021-11-23 17:39:42,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403404291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:42,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:42,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:39:42,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557787060] [2021-11-23 17:39:42,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:42,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:42,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:42,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:42,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:39:42,657 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:44,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:44,901 INFO L93 Difference]: Finished difference Result 3072 states and 5735 transitions. [2021-11-23 17:40:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:44,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 17:40:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:44,947 INFO L225 Difference]: With dead ends: 3072 [2021-11-23 17:40:44,947 INFO L226 Difference]: Without dead ends: 1895 [2021-11-23 17:40:44,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 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 17:40:44,961 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 858 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 3092 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 3498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 3092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:44,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 790 Invalid, 3498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 3092 Invalid, 0 Unknown, 0 Unchecked, 61.9s Time] [2021-11-23 17:40:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-11-23 17:40:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1838. [2021-11-23 17:40:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 1.6614044637996734) internal successors, (3052), 1837 states have internal predecessors, (3052), 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 17:40:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 3052 transitions. [2021-11-23 17:40:45,150 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 3052 transitions. Word has length 42 [2021-11-23 17:40:45,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:45,152 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 3052 transitions. [2021-11-23 17:40:45,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 3052 transitions. [2021-11-23 17:40:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 17:40:45,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:45,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:45,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:45,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:45,376 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:45,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1303807877, now seen corresponding path program 1 times [2021-11-23 17:40:45,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:45,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742375425] [2021-11-23 17:40:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:45,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:45,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:45,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:45,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:40:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:45,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:45,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:45,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:45,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:45,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742375425] [2021-11-23 17:40:45,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742375425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:45,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:45,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:40:45,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399991984] [2021-11-23 17:40:45,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:45,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:45,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:45,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:45,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:45,958 INFO L87 Difference]: Start difference. First operand 1838 states and 3052 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:58,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:58,303 INFO L93 Difference]: Finished difference Result 5267 states and 8799 transitions. [2021-11-23 17:41:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:41:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-23 17:41:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:58,337 INFO L225 Difference]: With dead ends: 5267 [2021-11-23 17:41:58,338 INFO L226 Difference]: Without dead ends: 3431 [2021-11-23 17:41:58,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 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 17:41:58,343 INFO L933 BasicCegarLoop]: 1028 mSDtfsCounter, 781 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:58,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 1215 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 2709 Invalid, 0 Unknown, 0 Unchecked, 72.2s Time] [2021-11-23 17:41:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-11-23 17:41:58,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 3426. [2021-11-23 17:41:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 1.4236496350364964) internal successors, (4876), 3425 states have internal predecessors, (4876), 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 17:41:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 4876 transitions. [2021-11-23 17:41:58,431 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 4876 transitions. Word has length 108 [2021-11-23 17:41:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:58,432 INFO L470 AbstractCegarLoop]: Abstraction has 3426 states and 4876 transitions. [2021-11-23 17:41:58,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 4876 transitions. [2021-11-23 17:41:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 17:41:58,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:58,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:58,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:58,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:58,648 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash 70686542, now seen corresponding path program 1 times [2021-11-23 17:41:58,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:58,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288398102] [2021-11-23 17:41:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:58,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:58,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:58,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:41:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:58,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:41:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:59,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:59,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:59,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288398102] [2021-11-23 17:41:59,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288398102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:59,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:59,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:41:59,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300650003] [2021-11-23 17:41:59,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:59,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:41:59,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:59,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:41:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:41:59,236 INFO L87 Difference]: Start difference. First operand 3426 states and 4876 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 17:43:10,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:10,322 INFO L93 Difference]: Finished difference Result 7673 states and 11093 transitions. [2021-11-23 17:43:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:43:10,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 115 [2021-11-23 17:43:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:10,362 INFO L225 Difference]: With dead ends: 7673 [2021-11-23 17:43:10,363 INFO L226 Difference]: Without dead ends: 4249 [2021-11-23 17:43:10,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 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 17:43:10,370 INFO L933 BasicCegarLoop]: 1117 mSDtfsCounter, 783 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 773 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:10,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1268 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [773 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 70.9s Time] [2021-11-23 17:43:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2021-11-23 17:43:10,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 4234. [2021-11-23 17:43:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 1.2886841483581384) internal successors, (5455), 4233 states have internal predecessors, (5455), 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 17:43:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 5455 transitions. [2021-11-23 17:43:10,483 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 5455 transitions. Word has length 115 [2021-11-23 17:43:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:10,486 INFO L470 AbstractCegarLoop]: Abstraction has 4234 states and 5455 transitions. [2021-11-23 17:43:10,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 17:43:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 5455 transitions. [2021-11-23 17:43:10,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 17:43:10,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:10,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:43:10,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:43:10,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:43:10,710 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash 504672606, now seen corresponding path program 1 times [2021-11-23 17:43:10,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:10,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651527965] [2021-11-23 17:43:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:10,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:10,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:10,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:10,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:43:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:10,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:10,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:13,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:43:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:19,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:19,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651527965] [2021-11-23 17:43:19,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651527965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:43:19,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [653709183] [2021-11-23 17:43:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:19,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:19,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:43:19,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:43:19,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 17:43:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:19,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:43:19,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:43:23,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:23,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [653709183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:23,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:43:23,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4] total 11 [2021-11-23 17:43:23,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150384743] [2021-11-23 17:43:23,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:23,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:43:23,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:23,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:43:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:43:23,506 INFO L87 Difference]: Start difference. First operand 4234 states and 5455 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 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 17:43:58,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:44:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:42,625 INFO L93 Difference]: Finished difference Result 8766 states and 12044 transitions. [2021-11-23 17:44:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:44:42,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 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 147 [2021-11-23 17:44:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:42,672 INFO L225 Difference]: With dead ends: 8766 [2021-11-23 17:44:42,673 INFO L226 Difference]: Without dead ends: 6909 [2021-11-23 17:44:42,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:44:42,678 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 6339 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 3641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6339 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 6523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3641 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:42,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6339 Valid, 363 Invalid, 6523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3641 Valid, 2882 Invalid, 0 Unknown, 0 Unchecked, 78.8s Time] [2021-11-23 17:44:42,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6909 states. [2021-11-23 17:44:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6909 to 5834. [2021-11-23 17:44:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5834 states, 5833 states have (on average 1.3432196125492886) internal successors, (7835), 5833 states have internal predecessors, (7835), 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 17:44:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5834 states to 5834 states and 7835 transitions. [2021-11-23 17:44:42,823 INFO L78 Accepts]: Start accepts. Automaton has 5834 states and 7835 transitions. Word has length 147 [2021-11-23 17:44:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:42,824 INFO L470 AbstractCegarLoop]: Abstraction has 5834 states and 7835 transitions. [2021-11-23 17:44:42,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 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 17:44:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 5834 states and 7835 transitions. [2021-11-23 17:44:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-23 17:44:42,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:42,829 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:42,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:43,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 17:44:43,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:43,231 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:43,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1260208465, now seen corresponding path program 1 times [2021-11-23 17:44:43,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:43,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021286479] [2021-11-23 17:44:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:43,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:43,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:43,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:43,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:44:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:43,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:44:43,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 17:44:46,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:46,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:46,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021286479] [2021-11-23 17:44:46,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021286479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:46,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:44:46,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:44:46,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156006685] [2021-11-23 17:44:46,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:46,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:44:46,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:46,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:44:46,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:44:46,195 INFO L87 Difference]: Start difference. First operand 5834 states and 7835 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 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 17:45:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:36,532 INFO L93 Difference]: Finished difference Result 10902 states and 14884 transitions. [2021-11-23 17:45:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:45:36,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 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 218 [2021-11-23 17:45:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:36,570 INFO L225 Difference]: With dead ends: 10902 [2021-11-23 17:45:36,570 INFO L226 Difference]: Without dead ends: 5857 [2021-11-23 17:45:36,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:45:36,577 INFO L933 BasicCegarLoop]: 1099 mSDtfsCounter, 1464 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 2519 SdHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:36,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 2519 Invalid, 3052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2866 Invalid, 0 Unknown, 0 Unchecked, 50.2s Time] [2021-11-23 17:45:36,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5857 states. [2021-11-23 17:45:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5857 to 5834. [2021-11-23 17:45:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5834 states, 5833 states have (on average 1.3406480370306875) internal successors, (7820), 5833 states have internal predecessors, (7820), 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 17:45:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5834 states to 5834 states and 7820 transitions. [2021-11-23 17:45:36,715 INFO L78 Accepts]: Start accepts. Automaton has 5834 states and 7820 transitions. Word has length 218 [2021-11-23 17:45:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:36,715 INFO L470 AbstractCegarLoop]: Abstraction has 5834 states and 7820 transitions. [2021-11-23 17:45:36,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 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 17:45:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5834 states and 7820 transitions. [2021-11-23 17:45:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-23 17:45:36,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:36,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:36,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:36,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:36,935 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:36,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1871039600, now seen corresponding path program 1 times [2021-11-23 17:45:36,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:36,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458878738] [2021-11-23 17:45:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:36,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:36,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:36,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:36,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:45:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:37,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:45:37,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:45:37,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:37,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:37,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458878738] [2021-11-23 17:45:37,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458878738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:37,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:45:37,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:45:37,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040734147] [2021-11-23 17:45:37,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:37,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:45:37,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:37,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:45:37,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:45:37,577 INFO L87 Difference]: Start difference. First operand 5834 states and 7820 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 17:46:40,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:46:40,036 INFO L93 Difference]: Finished difference Result 13283 states and 18778 transitions. [2021-11-23 17:46:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:46:40,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 226 [2021-11-23 17:46:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:46:40,095 INFO L225 Difference]: With dead ends: 13283 [2021-11-23 17:46:40,095 INFO L226 Difference]: Without dead ends: 8238 [2021-11-23 17:46:40,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 224 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 17:46:40,103 INFO L933 BasicCegarLoop]: 1890 mSDtfsCounter, 789 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:46:40,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 2034 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 2624 Invalid, 0 Unknown, 0 Unchecked, 62.3s Time] [2021-11-23 17:46:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8238 states. [2021-11-23 17:46:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8238 to 8217. [2021-11-23 17:46:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8217 states, 8216 states have (on average 1.2930866601752677) internal successors, (10624), 8216 states have internal predecessors, (10624), 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 17:46:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8217 states to 8217 states and 10624 transitions. [2021-11-23 17:46:40,279 INFO L78 Accepts]: Start accepts. Automaton has 8217 states and 10624 transitions. Word has length 226 [2021-11-23 17:46:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:46:40,279 INFO L470 AbstractCegarLoop]: Abstraction has 8217 states and 10624 transitions. [2021-11-23 17:46:40,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 17:46:40,280 INFO L276 IsEmpty]: Start isEmpty. Operand 8217 states and 10624 transitions. [2021-11-23 17:46:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-23 17:46:40,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:46:40,285 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:46:40,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:40,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:46:40,497 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:46:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:46:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash -881396596, now seen corresponding path program 1 times [2021-11-23 17:46:40,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:46:40,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391450633] [2021-11-23 17:46:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:40,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:46:40,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:46:40,500 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:46:40,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:46:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:40,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:46:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:46:41,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:46:41,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:46:41,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391450633] [2021-11-23 17:46:41,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391450633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:46:41,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:46:41,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:46:41,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936863781] [2021-11-23 17:46:41,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:46:41,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:46:41,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:46:41,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:46:41,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:46:41,433 INFO L87 Difference]: Start difference. First operand 8217 states and 10624 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 17:47:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:47:30,430 INFO L93 Difference]: Finished difference Result 21155 states and 28011 transitions. [2021-11-23 17:47:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:47:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 274 [2021-11-23 17:47:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:47:30,465 INFO L225 Difference]: With dead ends: 21155 [2021-11-23 17:47:30,465 INFO L226 Difference]: Without dead ends: 13727 [2021-11-23 17:47:30,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 272 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 17:47:30,475 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 879 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:47:30,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1027 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 48.8s Time] [2021-11-23 17:47:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13727 states. [2021-11-23 17:47:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13727 to 13725. [2021-11-23 17:47:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13725 states, 13724 states have (on average 1.2106528708831243) internal successors, (16615), 13724 states have internal predecessors, (16615), 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 17:47:30,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13725 states to 13725 states and 16615 transitions. [2021-11-23 17:47:30,857 INFO L78 Accepts]: Start accepts. Automaton has 13725 states and 16615 transitions. Word has length 274 [2021-11-23 17:47:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:47:30,857 INFO L470 AbstractCegarLoop]: Abstraction has 13725 states and 16615 transitions. [2021-11-23 17:47:30,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 17:47:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 13725 states and 16615 transitions. [2021-11-23 17:47:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-23 17:47:30,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:47:30,876 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:47:30,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:47:31,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:47:31,083 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:47:31,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:47:31,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1753590502, now seen corresponding path program 1 times [2021-11-23 17:47:31,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:47:31,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742082748] [2021-11-23 17:47:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:31,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:47:31,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:47:31,088 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:47:31,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:47:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:31,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:47:31,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 233 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-23 17:47:35,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:47:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 233 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-23 17:47:56,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:47:56,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742082748] [2021-11-23 17:47:56,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742082748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:47:56,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1304599139] [2021-11-23 17:47:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:56,955 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:47:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:47:56,956 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:47:56,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:47:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:57,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:47:57,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-23 17:47:57,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:47:57,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1304599139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:47:57,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:47:57,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:47:57,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068612088] [2021-11-23 17:47:57,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:47:57,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:47:57,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:47:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:47:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:47:57,770 INFO L87 Difference]: Start difference. First operand 13725 states and 16615 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 17:48:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:48:48,376 INFO L93 Difference]: Finished difference Result 29016 states and 35752 transitions. [2021-11-23 17:48:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:48:48,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 324 [2021-11-23 17:48:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:48:48,410 INFO L225 Difference]: With dead ends: 29016 [2021-11-23 17:48:48,410 INFO L226 Difference]: Without dead ends: 16080 [2021-11-23 17:48:48,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 964 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:48:48,421 INFO L933 BasicCegarLoop]: 1479 mSDtfsCounter, 1096 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:48:48,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 1570 Invalid, 3183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2408 Invalid, 0 Unknown, 0 Unchecked, 50.4s Time] [2021-11-23 17:48:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16080 states. [2021-11-23 17:48:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16080 to 14501. [2021-11-23 17:48:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14501 states, 14500 states have (on average 1.172) internal successors, (16994), 14500 states have internal predecessors, (16994), 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 17:48:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14501 states to 14501 states and 16994 transitions. [2021-11-23 17:48:48,650 INFO L78 Accepts]: Start accepts. Automaton has 14501 states and 16994 transitions. Word has length 324 [2021-11-23 17:48:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:48:48,651 INFO L470 AbstractCegarLoop]: Abstraction has 14501 states and 16994 transitions. [2021-11-23 17:48:48,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 17:48:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 14501 states and 16994 transitions. [2021-11-23 17:48:48,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-23 17:48:48,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:48:48,660 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:48:48,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:48:48,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:48:49,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:48:49,075 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:48:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:48:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash 965593074, now seen corresponding path program 1 times [2021-11-23 17:48:49,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:48:49,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372716094] [2021-11-23 17:48:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:48:49,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:48:49,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:48:49,079 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:48:49,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:48:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:48:49,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:48:49,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:48:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 119 proven. 208 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 17:48:52,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:49:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 119 proven. 208 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 17:49:08,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:49:08,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372716094] [2021-11-23 17:49:08,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372716094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:49:08,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1592709632] [2021-11-23 17:49:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:49:08,673 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:49:08,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:49:08,674 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:49:08,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:49:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:49:08,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:49:08,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:49:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 17:49:09,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:49:09,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1592709632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:49:09,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:49:09,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2021-11-23 17:49:09,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957640546] [2021-11-23 17:49:09,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:49:09,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:49:09,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:49:09,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:49:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:49:09,523 INFO L87 Difference]: Start difference. First operand 14501 states and 16994 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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 17:49:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:49:54,167 INFO L93 Difference]: Finished difference Result 38444 states and 45663 transitions. [2021-11-23 17:49:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:49:54,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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 327 [2021-11-23 17:49:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:49:54,218 INFO L225 Difference]: With dead ends: 38444 [2021-11-23 17:49:54,218 INFO L226 Difference]: Without dead ends: 23156 [2021-11-23 17:49:54,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 972 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:49:54,233 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 978 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:49:54,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 1713 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 44.4s Time] [2021-11-23 17:49:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23156 states. [2021-11-23 17:49:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23156 to 23154. [2021-11-23 17:49:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23154 states, 23153 states have (on average 1.146633265667516) internal successors, (26548), 23153 states have internal predecessors, (26548), 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 17:49:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23154 states to 23154 states and 26548 transitions. [2021-11-23 17:49:54,566 INFO L78 Accepts]: Start accepts. Automaton has 23154 states and 26548 transitions. Word has length 327 [2021-11-23 17:49:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:49:54,567 INFO L470 AbstractCegarLoop]: Abstraction has 23154 states and 26548 transitions. [2021-11-23 17:49:54,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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 17:49:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 23154 states and 26548 transitions. [2021-11-23 17:49:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-23 17:49:54,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:49:54,580 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:49:54,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:49:54,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:49:54,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:49:54,982 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:49:54,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:49:54,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1168397704, now seen corresponding path program 1 times [2021-11-23 17:49:54,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:49:54,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341693183] [2021-11-23 17:49:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:49:54,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:49:54,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:49:54,986 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:49:54,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:49:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:49:55,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:49:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:49:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 263 proven. 88 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 17:49:56,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:49:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 263 proven. 88 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 17:49:58,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:49:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341693183] [2021-11-23 17:49:58,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341693183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:49:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652699453] [2021-11-23 17:49:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:49:58,265 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:49:58,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:49:58,266 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:49:58,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:49:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:49:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:49:58,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:49:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 17:49:59,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:49:59,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1652699453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:49:59,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:49:59,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-23 17:49:59,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191648112] [2021-11-23 17:49:59,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:49:59,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:49:59,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:49:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:49:59,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:49:59,214 INFO L87 Difference]: Start difference. First operand 23154 states and 26548 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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 17:50:36,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:39,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:50:47,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:51:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:51:05,588 INFO L93 Difference]: Finished difference Result 51232 states and 59085 transitions. [2021-11-23 17:51:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:51:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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 330 [2021-11-23 17:51:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:51:05,640 INFO L225 Difference]: With dead ends: 51232 [2021-11-23 17:51:05,640 INFO L226 Difference]: Without dead ends: 28867 [2021-11-23 17:51:05,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 981 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:51:05,654 INFO L933 BasicCegarLoop]: 1706 mSDtfsCounter, 1648 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 885 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:51:05,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1648 Valid, 1862 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 2557 Invalid, 1 Unknown, 0 Unchecked, 66.1s Time] [2021-11-23 17:51:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2021-11-23 17:51:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 28669. [2021-11-23 17:51:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28669 states, 28668 states have (on average 1.128470768801451) internal successors, (32351), 28668 states have internal predecessors, (32351), 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 17:51:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28669 states to 28669 states and 32351 transitions. [2021-11-23 17:51:06,148 INFO L78 Accepts]: Start accepts. Automaton has 28669 states and 32351 transitions. Word has length 330 [2021-11-23 17:51:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:51:06,149 INFO L470 AbstractCegarLoop]: Abstraction has 28669 states and 32351 transitions. [2021-11-23 17:51:06,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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 17:51:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 28669 states and 32351 transitions. [2021-11-23 17:51:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-11-23 17:51:06,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:51:06,161 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:51:06,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:51:06,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:51:06,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:51:06,571 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:51:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:51:06,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1478414346, now seen corresponding path program 1 times [2021-11-23 17:51:06,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:51:06,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324218853] [2021-11-23 17:51:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:51:06,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:51:06,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:51:06,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:51:06,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:51:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:51:06,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:51:06,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:51:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 365 proven. 88 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-23 17:51:08,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:51:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 365 proven. 88 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-23 17:51:10,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:51:10,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324218853] [2021-11-23 17:51:10,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324218853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:51:10,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1810513981] [2021-11-23 17:51:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:51:10,565 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:51:10,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:51:10,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:51:10,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:51:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:51:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:51:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:51:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 365 proven. 88 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-23 17:51:12,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:51:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 365 proven. 88 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-23 17:51:14,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1810513981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:51:14,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852029339] [2021-11-23 17:51:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:51:14,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:51:14,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:51:14,777 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:51:14,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba58ec7c-51ea-415c-b9e2-fbf1a48d5998/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:51:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:51:15,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:51:15,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:51:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-11-23 17:51:16,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:51:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-11-23 17:51:16,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852029339] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:51:16,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:51:16,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 9 [2021-11-23 17:51:16,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841449738] [2021-11-23 17:51:16,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:51:16,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:51:16,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:51:16,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:51:16,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:51:16,573 INFO L87 Difference]: Start difference. First operand 28669 states and 32351 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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)