./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label56.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw --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 c32a1c240fa08c94c8e2d9ef78c149e9bedee3c9a83e144197714b3e6496faaf .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 05:28:55,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:28:55,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:28:55,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:28:55,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:28:55,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:28:55,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:28:55,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:28:56,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:28:56,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:28:56,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:28:56,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:28:56,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:28:56,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:28:56,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:28:56,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:28:56,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:28:56,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:28:56,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:28:56,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:28:56,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:28:56,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:28:56,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:28:56,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:28:56,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:28:56,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:28:56,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:28:56,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:28:56,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:28:56,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:28:56,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:28:56,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:28:56,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:28:56,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:28:56,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:28:56,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:28:56,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:28:56,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:28:56,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:28:56,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:28:56,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:28:56,087 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:28:56,128 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:28:56,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:28:56,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:28:56,129 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:28:56,130 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:28:56,130 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:28:56,130 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:28:56,130 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:28:56,131 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:28:56,131 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:28:56,131 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:28:56,131 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:28:56,132 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:28:56,132 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:28:56,132 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:28:56,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:28:56,133 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:28:56,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:28:56,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:28:56,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:28:56,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:28:56,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:28:56,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:28:56,135 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:28:56,135 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:28:56,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:28:56,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:28:56,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:28:56,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:28:56,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:28:56,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:28:56,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:28:56,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:28:56,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:28:56,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:28:56,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:28:56,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:28:56,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:28:56,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:28:56,139 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_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c32a1c240fa08c94c8e2d9ef78c149e9bedee3c9a83e144197714b3e6496faaf [2021-10-20 05:28:56,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:28:56,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:28:56,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:28:56,507 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:28:56,512 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:28:56,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/eca-rers2012/Problem02_label56.c [2021-10-20 05:28:56,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/data/10c1b76f1/e60b94a5a60f41378384f6953dd753d0/FLAG807a4c82c [2021-10-20 05:28:57,373 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:28:57,373 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/sv-benchmarks/c/eca-rers2012/Problem02_label56.c [2021-10-20 05:28:57,399 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/data/10c1b76f1/e60b94a5a60f41378384f6953dd753d0/FLAG807a4c82c [2021-10-20 05:28:57,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/data/10c1b76f1/e60b94a5a60f41378384f6953dd753d0 [2021-10-20 05:28:57,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:28:57,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:28:57,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:28:57,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:28:57,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:28:57,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:28:57" (1/1) ... [2021-10-20 05:28:57,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188bbb69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:57, skipping insertion in model container [2021-10-20 05:28:57,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:28:57" (1/1) ... [2021-10-20 05:28:57,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:28:57,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:28:58,160 WARN L228 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_d4ec57a3-72a3-4e64-abee-a271ace9a15e/sv-benchmarks/c/eca-rers2012/Problem02_label56.c[19398,19411] [2021-10-20 05:28:58,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:28:58,234 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:28:58,339 WARN L228 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_d4ec57a3-72a3-4e64-abee-a271ace9a15e/sv-benchmarks/c/eca-rers2012/Problem02_label56.c[19398,19411] [2021-10-20 05:28:58,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:28:58,367 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:28:58,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58 WrapperNode [2021-10-20 05:28:58,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:28:58,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:28:58,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:28:58,370 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:28:58,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (1/1) ... [2021-10-20 05:28:58,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (1/1) ... [2021-10-20 05:28:58,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:28:58,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:28:58,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:28:58,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:28:58,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (1/1) ... [2021-10-20 05:28:58,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (1/1) ... [2021-10-20 05:28:58,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (1/1) ... [2021-10-20 05:28:58,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (1/1) ... [2021-10-20 05:28:58,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (1/1) ... [2021-10-20 05:28:58,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (1/1) ... [2021-10-20 05:28:58,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (1/1) ... [2021-10-20 05:28:58,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:28:58,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:28:58,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:28:58,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:28:58,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (1/1) ... [2021-10-20 05:28:58,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:28:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:28:58,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:28:58,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:28:58,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:28:58,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:28:58,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:28:58,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:29:01,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:29:01,186 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-20 05:29:01,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:29:01 BoogieIcfgContainer [2021-10-20 05:29:01,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:29:01,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:29:01,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:29:01,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:29:01,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:28:57" (1/3) ... [2021-10-20 05:29:01,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556a290c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:29:01, skipping insertion in model container [2021-10-20 05:29:01,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:28:58" (2/3) ... [2021-10-20 05:29:01,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556a290c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:29:01, skipping insertion in model container [2021-10-20 05:29:01,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:29:01" (3/3) ... [2021-10-20 05:29:01,202 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem02_label56.c [2021-10-20 05:29:01,209 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:29:01,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:29:01,278 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:29:01,289 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 [2021-10-20 05:29:01,289 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:29:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 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) [2021-10-20 05:29:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-20 05:29:01,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:01,325 INFO L512 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, 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] [2021-10-20 05:29:01,326 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:01,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1814582295, now seen corresponding path program 1 times [2021-10-20 05:29:01,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:01,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839580182] [2021-10-20 05:29:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:01,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:29:01,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:01,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839580182] [2021-10-20 05:29:01,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839580182] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:01,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:29:01,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:29:01,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909912071] [2021-10-20 05:29:01,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:29:01,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:01,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:29:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:01,939 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 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 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-10-20 05:29:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:02,493 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2021-10-20 05:29:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:29:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2021-10-20 05:29:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:02,518 INFO L225 Difference]: With dead ends: 251 [2021-10-20 05:29:02,518 INFO L226 Difference]: Without dead ends: 163 [2021-10-20 05:29:02,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-20 05:29:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-10-20 05:29:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.7777777777777777) internal successors, (288), 162 states have internal predecessors, (288), 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) [2021-10-20 05:29:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 288 transitions. [2021-10-20 05:29:02,575 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 288 transitions. Word has length 80 [2021-10-20 05:29:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:02,576 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 288 transitions. [2021-10-20 05:29:02,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-10-20 05:29:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 288 transitions. [2021-10-20 05:29:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-20 05:29:02,581 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:02,582 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-20 05:29:02,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:29:02,583 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:02,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1679358966, now seen corresponding path program 1 times [2021-10-20 05:29:02,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:02,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91232633] [2021-10-20 05:29:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:02,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:29:02,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:02,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91232633] [2021-10-20 05:29:02,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91232633] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:02,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:29:02,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:29:02,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338208176] [2021-10-20 05:29:02,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:29:02,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:29:02,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:02,687 INFO L87 Difference]: Start difference. First operand 163 states and 288 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2021-10-20 05:29:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:03,081 INFO L93 Difference]: Finished difference Result 487 states and 862 transitions. [2021-10-20 05:29:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:29:03,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 98 [2021-10-20 05:29:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:03,090 INFO L225 Difference]: With dead ends: 487 [2021-10-20 05:29:03,091 INFO L226 Difference]: Without dead ends: 325 [2021-10-20 05:29:03,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-10-20 05:29:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2021-10-20 05:29:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.704968944099379) internal successors, (549), 322 states have internal predecessors, (549), 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) [2021-10-20 05:29:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 549 transitions. [2021-10-20 05:29:03,131 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 549 transitions. Word has length 98 [2021-10-20 05:29:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:03,132 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 549 transitions. [2021-10-20 05:29:03,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2021-10-20 05:29:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 549 transitions. [2021-10-20 05:29:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-20 05:29:03,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:03,135 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-20 05:29:03,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:29:03,135 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:03,136 INFO L82 PathProgramCache]: Analyzing trace with hash 652328292, now seen corresponding path program 1 times [2021-10-20 05:29:03,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:03,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129723369] [2021-10-20 05:29:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:03,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:29:03,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:03,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129723369] [2021-10-20 05:29:03,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129723369] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:03,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:29:03,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:29:03,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976823486] [2021-10-20 05:29:03,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:29:03,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:03,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:29:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:03,203 INFO L87 Difference]: Start difference. First operand 323 states and 549 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2021-10-20 05:29:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:03,417 INFO L93 Difference]: Finished difference Result 645 states and 1097 transitions. [2021-10-20 05:29:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:29:03,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 99 [2021-10-20 05:29:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:03,421 INFO L225 Difference]: With dead ends: 645 [2021-10-20 05:29:03,421 INFO L226 Difference]: Without dead ends: 323 [2021-10-20 05:29:03,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-20 05:29:03,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-10-20 05:29:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5186335403726707) internal successors, (489), 322 states have internal predecessors, (489), 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) [2021-10-20 05:29:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 489 transitions. [2021-10-20 05:29:03,444 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 489 transitions. Word has length 99 [2021-10-20 05:29:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:03,445 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 489 transitions. [2021-10-20 05:29:03,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2021-10-20 05:29:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 489 transitions. [2021-10-20 05:29:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-20 05:29:03,449 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:03,449 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-10-20 05:29:03,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 05:29:03,450 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:03,451 INFO L82 PathProgramCache]: Analyzing trace with hash 999206955, now seen corresponding path program 1 times [2021-10-20 05:29:03,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:03,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211306680] [2021-10-20 05:29:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:03,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-20 05:29:03,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:03,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211306680] [2021-10-20 05:29:03,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211306680] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:03,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:29:03,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:29:03,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750948512] [2021-10-20 05:29:03,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:29:03,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:03,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:29:03,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:03,515 INFO L87 Difference]: Start difference. First operand 323 states and 489 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-10-20 05:29:03,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:03,830 INFO L93 Difference]: Finished difference Result 805 states and 1197 transitions. [2021-10-20 05:29:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:29:03,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 102 [2021-10-20 05:29:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:03,834 INFO L225 Difference]: With dead ends: 805 [2021-10-20 05:29:03,835 INFO L226 Difference]: Without dead ends: 483 [2021-10-20 05:29:03,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-10-20 05:29:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2021-10-20 05:29:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.3672199170124482) internal successors, (659), 482 states have internal predecessors, (659), 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) [2021-10-20 05:29:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 659 transitions. [2021-10-20 05:29:03,859 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 659 transitions. Word has length 102 [2021-10-20 05:29:03,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:03,860 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 659 transitions. [2021-10-20 05:29:03,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-10-20 05:29:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 659 transitions. [2021-10-20 05:29:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-20 05:29:03,865 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:03,865 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:29:03,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 05:29:03,866 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:03,867 INFO L82 PathProgramCache]: Analyzing trace with hash 696166414, now seen corresponding path program 1 times [2021-10-20 05:29:03,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:03,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595319128] [2021-10-20 05:29:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:03,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-20 05:29:03,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:03,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595319128] [2021-10-20 05:29:03,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595319128] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:03,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:29:03,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:29:03,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017590202] [2021-10-20 05:29:03,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:29:03,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:03,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:29:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:03,927 INFO L87 Difference]: Start difference. First operand 483 states and 659 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-10-20 05:29:04,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:04,247 INFO L93 Difference]: Finished difference Result 1125 states and 1578 transitions. [2021-10-20 05:29:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:29:04,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 107 [2021-10-20 05:29:04,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:04,255 INFO L225 Difference]: With dead ends: 1125 [2021-10-20 05:29:04,255 INFO L226 Difference]: Without dead ends: 723 [2021-10-20 05:29:04,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:04,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-10-20 05:29:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 723. [2021-10-20 05:29:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.2950138504155124) internal successors, (935), 722 states have internal predecessors, (935), 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) [2021-10-20 05:29:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 935 transitions. [2021-10-20 05:29:04,288 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 935 transitions. Word has length 107 [2021-10-20 05:29:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:04,290 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 935 transitions. [2021-10-20 05:29:04,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2021-10-20 05:29:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 935 transitions. [2021-10-20 05:29:04,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-20 05:29:04,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:04,295 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-10-20 05:29:04,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 05:29:04,295 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:04,296 INFO L82 PathProgramCache]: Analyzing trace with hash -985383773, now seen corresponding path program 1 times [2021-10-20 05:29:04,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:04,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689113937] [2021-10-20 05:29:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:04,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:29:04,555 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:04,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689113937] [2021-10-20 05:29:04,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689113937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 05:29:04,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088184815] [2021-10-20 05:29:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:04,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:29:04,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:29:04,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 05:29:04,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 05:29:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:04,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-20 05:29:04,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:29:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-20 05:29:05,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:29:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-20 05:29:05,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088184815] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:05,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-20 05:29:05,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-20 05:29:05,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64129298] [2021-10-20 05:29:05,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:29:05,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:05,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:29:05,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:29:05,580 INFO L87 Difference]: Start difference. First operand 723 states and 935 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2021-10-20 05:29:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:05,896 INFO L93 Difference]: Finished difference Result 1525 states and 2015 transitions. [2021-10-20 05:29:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:29:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 107 [2021-10-20 05:29:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:05,901 INFO L225 Difference]: With dead ends: 1525 [2021-10-20 05:29:05,901 INFO L226 Difference]: Without dead ends: 563 [2021-10-20 05:29:05,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:29:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-10-20 05:29:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-10-20 05:29:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.302491103202847) internal successors, (732), 562 states have internal predecessors, (732), 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) [2021-10-20 05:29:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 732 transitions. [2021-10-20 05:29:05,921 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 732 transitions. Word has length 107 [2021-10-20 05:29:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:05,921 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 732 transitions. [2021-10-20 05:29:05,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2021-10-20 05:29:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 732 transitions. [2021-10-20 05:29:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-20 05:29:05,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:05,924 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-10-20 05:29:05,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-20 05:29:06,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:29:06,140 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:06,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:06,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1105131928, now seen corresponding path program 1 times [2021-10-20 05:29:06,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:06,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770619385] [2021-10-20 05:29:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:06,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:29:06,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:06,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770619385] [2021-10-20 05:29:06,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770619385] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:06,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:29:06,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:29:06,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629316024] [2021-10-20 05:29:06,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:29:06,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:06,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:29:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:06,225 INFO L87 Difference]: Start difference. First operand 563 states and 732 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-10-20 05:29:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:06,508 INFO L93 Difference]: Finished difference Result 1205 states and 1579 transitions. [2021-10-20 05:29:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:29:06,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 109 [2021-10-20 05:29:06,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:06,514 INFO L225 Difference]: With dead ends: 1205 [2021-10-20 05:29:06,514 INFO L226 Difference]: Without dead ends: 723 [2021-10-20 05:29:06,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-10-20 05:29:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 643. [2021-10-20 05:29:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 1.2710280373831775) internal successors, (816), 642 states have internal predecessors, (816), 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) [2021-10-20 05:29:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 816 transitions. [2021-10-20 05:29:06,537 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 816 transitions. Word has length 109 [2021-10-20 05:29:06,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:06,538 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 816 transitions. [2021-10-20 05:29:06,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2021-10-20 05:29:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 816 transitions. [2021-10-20 05:29:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-20 05:29:06,541 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:06,541 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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] [2021-10-20 05:29:06,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-20 05:29:06,541 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:06,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1872807474, now seen corresponding path program 1 times [2021-10-20 05:29:06,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:06,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285270247] [2021-10-20 05:29:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:06,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:29:06,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:06,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285270247] [2021-10-20 05:29:06,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285270247] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:06,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:29:06,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:29:06,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763751294] [2021-10-20 05:29:06,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:29:06,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:29:06,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:06,605 INFO L87 Difference]: Start difference. First operand 643 states and 816 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-10-20 05:29:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:06,863 INFO L93 Difference]: Finished difference Result 1125 states and 1457 transitions. [2021-10-20 05:29:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:29:06,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 113 [2021-10-20 05:29:06,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:06,867 INFO L225 Difference]: With dead ends: 1125 [2021-10-20 05:29:06,867 INFO L226 Difference]: Without dead ends: 563 [2021-10-20 05:29:06,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-10-20 05:29:06,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-10-20 05:29:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.2241992882562278) internal successors, (688), 562 states have internal predecessors, (688), 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) [2021-10-20 05:29:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 688 transitions. [2021-10-20 05:29:06,884 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 688 transitions. Word has length 113 [2021-10-20 05:29:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:06,884 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 688 transitions. [2021-10-20 05:29:06,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-10-20 05:29:06,885 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 688 transitions. [2021-10-20 05:29:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-10-20 05:29:06,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:06,888 INFO L512 BasicCegarLoop]: trace histogram [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, 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] [2021-10-20 05:29:06,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-20 05:29:06,892 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:06,893 INFO L82 PathProgramCache]: Analyzing trace with hash -997994422, now seen corresponding path program 1 times [2021-10-20 05:29:06,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:06,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037813985] [2021-10-20 05:29:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:06,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 58 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-20 05:29:07,036 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:07,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037813985] [2021-10-20 05:29:07,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037813985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 05:29:07,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379089612] [2021-10-20 05:29:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:07,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:29:07,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:29:07,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 05:29:07,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-20 05:29:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:07,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-20 05:29:07,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:29:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-20 05:29:07,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:29:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-20 05:29:07,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379089612] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:07,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-20 05:29:07,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 7 [2021-10-20 05:29:07,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822351431] [2021-10-20 05:29:07,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:29:07,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:07,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:29:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:29:07,992 INFO L87 Difference]: Start difference. First operand 563 states and 688 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2021-10-20 05:29:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:08,460 INFO L93 Difference]: Finished difference Result 1285 states and 1609 transitions. [2021-10-20 05:29:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:29:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 131 [2021-10-20 05:29:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:08,465 INFO L225 Difference]: With dead ends: 1285 [2021-10-20 05:29:08,465 INFO L226 Difference]: Without dead ends: 643 [2021-10-20 05:29:08,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:29:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-10-20 05:29:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2021-10-20 05:29:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 1.1137071651090342) internal successors, (715), 642 states have internal predecessors, (715), 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) [2021-10-20 05:29:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 715 transitions. [2021-10-20 05:29:08,486 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 715 transitions. Word has length 131 [2021-10-20 05:29:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:08,487 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 715 transitions. [2021-10-20 05:29:08,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2021-10-20 05:29:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 715 transitions. [2021-10-20 05:29:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-10-20 05:29:08,490 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:08,491 INFO L512 BasicCegarLoop]: trace histogram [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, 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] [2021-10-20 05:29:08,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-20 05:29:08,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:29:08,716 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:08,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1927539222, now seen corresponding path program 1 times [2021-10-20 05:29:08,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:08,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897025874] [2021-10-20 05:29:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:08,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:29:08,854 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:08,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897025874] [2021-10-20 05:29:08,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897025874] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:08,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:29:08,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:29:08,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746808403] [2021-10-20 05:29:08,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:29:08,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:29:08,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:29:08,859 INFO L87 Difference]: Start difference. First operand 643 states and 715 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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) [2021-10-20 05:29:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:09,178 INFO L93 Difference]: Finished difference Result 1205 states and 1346 transitions. [2021-10-20 05:29:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:29:09,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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 178 [2021-10-20 05:29:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:09,183 INFO L225 Difference]: With dead ends: 1205 [2021-10-20 05:29:09,183 INFO L226 Difference]: Without dead ends: 643 [2021-10-20 05:29:09,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:29:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-10-20 05:29:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2021-10-20 05:29:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 1.1090342679127725) internal successors, (712), 642 states have internal predecessors, (712), 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) [2021-10-20 05:29:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 712 transitions. [2021-10-20 05:29:09,203 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 712 transitions. Word has length 178 [2021-10-20 05:29:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:09,204 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 712 transitions. [2021-10-20 05:29:09,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 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) [2021-10-20 05:29:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 712 transitions. [2021-10-20 05:29:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-10-20 05:29:09,207 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:09,208 INFO L512 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:29:09,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-20 05:29:09,209 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1337390420, now seen corresponding path program 1 times [2021-10-20 05:29:09,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:09,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368807858] [2021-10-20 05:29:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:09,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-10-20 05:29:09,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:09,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368807858] [2021-10-20 05:29:09,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368807858] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:09,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:29:09,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:29:09,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073018762] [2021-10-20 05:29:09,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:29:09,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:29:09,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:09,355 INFO L87 Difference]: Start difference. First operand 643 states and 712 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2021-10-20 05:29:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:09,581 INFO L93 Difference]: Finished difference Result 805 states and 897 transitions. [2021-10-20 05:29:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:29:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 200 [2021-10-20 05:29:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:09,586 INFO L225 Difference]: With dead ends: 805 [2021-10-20 05:29:09,586 INFO L226 Difference]: Without dead ends: 803 [2021-10-20 05:29:09,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:29:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-10-20 05:29:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 723. [2021-10-20 05:29:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.1204986149584488) internal successors, (809), 722 states have internal predecessors, (809), 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) [2021-10-20 05:29:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 809 transitions. [2021-10-20 05:29:09,607 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 809 transitions. Word has length 200 [2021-10-20 05:29:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:09,607 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 809 transitions. [2021-10-20 05:29:09,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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) [2021-10-20 05:29:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 809 transitions. [2021-10-20 05:29:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-10-20 05:29:09,633 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:29:09,633 INFO L512 BasicCegarLoop]: trace histogram [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, 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] [2021-10-20 05:29:09,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-20 05:29:09,634 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:29:09,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:29:09,634 INFO L82 PathProgramCache]: Analyzing trace with hash -32388136, now seen corresponding path program 1 times [2021-10-20 05:29:09,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:29:09,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856859785] [2021-10-20 05:29:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:09,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:29:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 93 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:29:09,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:29:09,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856859785] [2021-10-20 05:29:09,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856859785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 05:29:09,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713457920] [2021-10-20 05:29:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:29:09,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:29:09,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:29:09,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 05:29:09,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-20 05:29:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:29:10,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-20 05:29:10,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:29:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-20 05:29:10,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:29:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-20 05:29:10,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713457920] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:29:10,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-20 05:29:10,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 8 [2021-10-20 05:29:10,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125978493] [2021-10-20 05:29:10,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:29:10,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:29:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:29:10,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-20 05:29:10,948 INFO L87 Difference]: Start difference. First operand 723 states and 809 transitions. Second operand has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-10-20 05:29:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:29:11,296 INFO L93 Difference]: Finished difference Result 1523 states and 1715 transitions. [2021-10-20 05:29:11,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:29:11,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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 210 [2021-10-20 05:29:11,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:29:11,297 INFO L225 Difference]: With dead ends: 1523 [2021-10-20 05:29:11,297 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 05:29:11,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-20 05:29:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 05:29:11,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 05:29:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:29:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 05:29:11,300 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 210 [2021-10-20 05:29:11,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:29:11,300 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 05:29:11,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-10-20 05:29:11,300 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 05:29:11,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 05:29:11,303 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:29:11,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-20 05:29:11,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:29:11,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-20 05:29:11,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:29:11,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:29:11,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 05:29:11,801 INFO L857 garLoopResultBuilder]: For program point L301(lines 301 423) no Hoare annotation was computed. [2021-10-20 05:29:11,802 INFO L857 garLoopResultBuilder]: For program point L235(lines 235 423) no Hoare annotation was computed. [2021-10-20 05:29:11,802 INFO L857 garLoopResultBuilder]: For program point L169(lines 169 423) no Hoare annotation was computed. [2021-10-20 05:29:11,802 INFO L857 garLoopResultBuilder]: For program point L303(lines 303 423) no Hoare annotation was computed. [2021-10-20 05:29:11,802 INFO L857 garLoopResultBuilder]: For program point L105(lines 105 423) no Hoare annotation was computed. [2021-10-20 05:29:11,802 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 423) no Hoare annotation was computed. [2021-10-20 05:29:11,802 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 423) no Hoare annotation was computed. [2021-10-20 05:29:11,802 INFO L857 garLoopResultBuilder]: For program point L307(lines 307 423) no Hoare annotation was computed. [2021-10-20 05:29:11,802 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 423) no Hoare annotation was computed. [2021-10-20 05:29:11,802 INFO L857 garLoopResultBuilder]: For program point L109(lines 109 423) no Hoare annotation was computed. [2021-10-20 05:29:11,803 INFO L857 garLoopResultBuilder]: For program point L242(lines 242 423) no Hoare annotation was computed. [2021-10-20 05:29:11,803 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 423) no Hoare annotation was computed. [2021-10-20 05:29:11,803 INFO L857 garLoopResultBuilder]: For program point L244(lines 244 423) no Hoare annotation was computed. [2021-10-20 05:29:11,803 INFO L857 garLoopResultBuilder]: For program point L179(lines 179 423) no Hoare annotation was computed. [2021-10-20 05:29:11,803 INFO L857 garLoopResultBuilder]: For program point L378(lines 378 423) no Hoare annotation was computed. [2021-10-20 05:29:11,803 INFO L857 garLoopResultBuilder]: For program point L48(lines 48 423) no Hoare annotation was computed. [2021-10-20 05:29:11,803 INFO L857 garLoopResultBuilder]: For program point L247(lines 247 423) no Hoare annotation was computed. [2021-10-20 05:29:11,803 INFO L857 garLoopResultBuilder]: For program point L116(lines 116 423) no Hoare annotation was computed. [2021-10-20 05:29:11,803 INFO L857 garLoopResultBuilder]: For program point L52(lines 52 423) no Hoare annotation was computed. [2021-10-20 05:29:11,803 INFO L857 garLoopResultBuilder]: For program point L185(lines 185 423) no Hoare annotation was computed. [2021-10-20 05:29:11,804 INFO L857 garLoopResultBuilder]: For program point L385(lines 385 423) no Hoare annotation was computed. [2021-10-20 05:29:11,804 INFO L857 garLoopResultBuilder]: For program point L319(lines 319 423) no Hoare annotation was computed. [2021-10-20 05:29:11,804 INFO L857 garLoopResultBuilder]: For program point L189(lines 189 423) no Hoare annotation was computed. [2021-10-20 05:29:11,804 INFO L857 garLoopResultBuilder]: For program point L123(lines 123 423) no Hoare annotation was computed. [2021-10-20 05:29:11,804 INFO L857 garLoopResultBuilder]: For program point L57(lines 57 423) no Hoare annotation was computed. [2021-10-20 05:29:11,804 INFO L857 garLoopResultBuilder]: For program point L388(lines 388 423) no Hoare annotation was computed. [2021-10-20 05:29:11,804 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-20 05:29:11,804 INFO L857 garLoopResultBuilder]: For program point L390(lines 390 423) no Hoare annotation was computed. [2021-10-20 05:29:11,804 INFO L857 garLoopResultBuilder]: For program point L324(lines 324 423) no Hoare annotation was computed. [2021-10-20 05:29:11,805 INFO L857 garLoopResultBuilder]: For program point L258(lines 258 423) no Hoare annotation was computed. [2021-10-20 05:29:11,805 INFO L857 garLoopResultBuilder]: For program point L60(lines 60 423) no Hoare annotation was computed. [2021-10-20 05:29:11,805 INFO L857 garLoopResultBuilder]: For program point L195(lines 195 423) no Hoare annotation was computed. [2021-10-20 05:29:11,805 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 423) no Hoare annotation was computed. [2021-10-20 05:29:11,805 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 423) no Hoare annotation was computed. [2021-10-20 05:29:11,805 INFO L857 garLoopResultBuilder]: For program point L263(lines 263 423) no Hoare annotation was computed. [2021-10-20 05:29:11,805 INFO L857 garLoopResultBuilder]: For program point L197(lines 197 423) no Hoare annotation was computed. [2021-10-20 05:29:11,805 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 551) no Hoare annotation was computed. [2021-10-20 05:29:11,805 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 423) no Hoare annotation was computed. [2021-10-20 05:29:11,806 INFO L857 garLoopResultBuilder]: For program point L133(lines 133 423) no Hoare annotation was computed. [2021-10-20 05:29:11,806 INFO L857 garLoopResultBuilder]: For program point L399(lines 399 423) no Hoare annotation was computed. [2021-10-20 05:29:11,806 INFO L857 garLoopResultBuilder]: For program point L201(lines 201 423) no Hoare annotation was computed. [2021-10-20 05:29:11,806 INFO L857 garLoopResultBuilder]: For program point L69(lines 69 423) no Hoare annotation was computed. [2021-10-20 05:29:11,806 INFO L857 garLoopResultBuilder]: For program point L269(lines 269 423) no Hoare annotation was computed. [2021-10-20 05:29:11,806 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 423) no Hoare annotation was computed. [2021-10-20 05:29:11,806 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 423) no Hoare annotation was computed. [2021-10-20 05:29:11,806 INFO L857 garLoopResultBuilder]: For program point L404(lines 404 423) no Hoare annotation was computed. [2021-10-20 05:29:11,806 INFO L857 garLoopResultBuilder]: For program point L338(lines 338 423) no Hoare annotation was computed. [2021-10-20 05:29:11,807 INFO L857 garLoopResultBuilder]: For program point L140(lines 140 423) no Hoare annotation was computed. [2021-10-20 05:29:11,807 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 423) no Hoare annotation was computed. [2021-10-20 05:29:11,807 INFO L857 garLoopResultBuilder]: For program point L208(lines 208 423) no Hoare annotation was computed. [2021-10-20 05:29:11,807 INFO L857 garLoopResultBuilder]: For program point L341(lines 341 423) no Hoare annotation was computed. [2021-10-20 05:29:11,807 INFO L857 garLoopResultBuilder]: For program point L408(lines 408 423) no Hoare annotation was computed. [2021-10-20 05:29:11,807 INFO L857 garLoopResultBuilder]: For program point L144(lines 144 423) no Hoare annotation was computed. [2021-10-20 05:29:11,808 INFO L853 garLoopResultBuilder]: At program point L607(lines 39 608) the Hoare annotation is: (let ((.cse0 (<= 10 ~a28~0)) (.cse2 (<= ~a28~0 10)) (.cse5 (< 8 ~a28~0)) (.cse7 (<= ~a28~0 7)) (.cse4 (= ~a25~0 1)) (.cse3 (= ~a19~0 1)) (.cse1 (<= ~a17~0 8)) (.cse6 (not (= ~a11~0 1))) (.cse8 (= ~a25~0 0))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse1 .cse2 .cse3 .cse5) (and .cse0 .cse4 .cse1 .cse2 .cse6) (and .cse4 .cse1 .cse7) (and .cse1 .cse2 .cse3 .cse5 .cse8) (<= ~a17~0 7) (and .cse1 .cse8 .cse7) (and .cse4 .cse1 .cse3 .cse6) (and (< ~a28~0 10) .cse1 .cse6 .cse8))) [2021-10-20 05:29:11,808 INFO L857 garLoopResultBuilder]: For program point L79(lines 79 423) no Hoare annotation was computed. [2021-10-20 05:29:11,808 INFO L857 garLoopResultBuilder]: For program point L212(lines 212 423) no Hoare annotation was computed. [2021-10-20 05:29:11,808 INFO L860 garLoopResultBuilder]: At program point L610(lines 610 627) the Hoare annotation is: true [2021-10-20 05:29:11,808 INFO L857 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-10-20 05:29:11,808 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 423) no Hoare annotation was computed. [2021-10-20 05:29:11,808 INFO L857 garLoopResultBuilder]: For program point L149(lines 149 423) no Hoare annotation was computed. [2021-10-20 05:29:11,808 INFO L857 garLoopResultBuilder]: For program point L414(lines 414 423) no Hoare annotation was computed. [2021-10-20 05:29:11,808 INFO L857 garLoopResultBuilder]: For program point L84(lines 84 423) no Hoare annotation was computed. [2021-10-20 05:29:11,809 INFO L857 garLoopResultBuilder]: For program point L547-1(lines 39 608) no Hoare annotation was computed. [2021-10-20 05:29:11,809 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-20 05:29:11,809 INFO L857 garLoopResultBuilder]: For program point L417(lines 417 423) no Hoare annotation was computed. [2021-10-20 05:29:11,809 INFO L857 garLoopResultBuilder]: For program point L153(lines 153 423) no Hoare annotation was computed. [2021-10-20 05:29:11,809 INFO L853 garLoopResultBuilder]: At program point L616-2(lines 616 626) the Hoare annotation is: (let ((.cse0 (<= 10 ~a28~0)) (.cse2 (<= ~a28~0 10)) (.cse5 (< 8 ~a28~0)) (.cse7 (<= ~a28~0 7)) (.cse4 (= ~a25~0 1)) (.cse3 (= ~a19~0 1)) (.cse1 (<= ~a17~0 8)) (.cse6 (not (= ~a11~0 1))) (.cse8 (= ~a25~0 0))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse1 .cse2 .cse3 .cse5) (and .cse0 .cse4 .cse1 .cse2 .cse6) (and .cse4 .cse1 .cse7) (and .cse1 .cse2 .cse3 .cse5 .cse8) (<= ~a17~0 7) (and .cse1 .cse8 .cse7) (and .cse4 .cse1 .cse3 .cse6) (and (< ~a28~0 10) .cse1 .cse6 .cse8))) [2021-10-20 05:29:11,809 INFO L857 garLoopResultBuilder]: For program point L550-1(lines 39 608) no Hoare annotation was computed. [2021-10-20 05:29:11,809 INFO L857 garLoopResultBuilder]: For program point L286(lines 286 423) no Hoare annotation was computed. [2021-10-20 05:29:11,809 INFO L857 garLoopResultBuilder]: For program point L551(line 551) no Hoare annotation was computed. [2021-10-20 05:29:11,810 INFO L857 garLoopResultBuilder]: For program point L419(lines 419 423) no Hoare annotation was computed. [2021-10-20 05:29:11,810 INFO L857 garLoopResultBuilder]: For program point L222(lines 222 423) no Hoare annotation was computed. [2021-10-20 05:29:11,810 INFO L857 garLoopResultBuilder]: For program point L290(lines 290 423) no Hoare annotation was computed. [2021-10-20 05:29:11,810 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 423) no Hoare annotation was computed. [2021-10-20 05:29:11,810 INFO L857 garLoopResultBuilder]: For program point L92(lines 92 423) no Hoare annotation was computed. [2021-10-20 05:29:11,810 INFO L857 garLoopResultBuilder]: For program point L621(line 621) no Hoare annotation was computed. [2021-10-20 05:29:11,810 INFO L857 garLoopResultBuilder]: For program point L225(lines 225 423) no Hoare annotation was computed. [2021-10-20 05:29:11,810 INFO L857 garLoopResultBuilder]: For program point L359(lines 359 423) no Hoare annotation was computed. [2021-10-20 05:29:11,810 INFO L857 garLoopResultBuilder]: For program point L293(lines 293 423) no Hoare annotation was computed. [2021-10-20 05:29:11,811 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 423) no Hoare annotation was computed. [2021-10-20 05:29:11,811 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 423) no Hoare annotation was computed. [2021-10-20 05:29:11,811 INFO L857 garLoopResultBuilder]: For program point L164(lines 164 423) no Hoare annotation was computed. [2021-10-20 05:29:11,811 INFO L857 garLoopResultBuilder]: For program point L364(lines 364 423) no Hoare annotation was computed. [2021-10-20 05:29:11,811 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 423) no Hoare annotation was computed. [2021-10-20 05:29:11,811 INFO L857 garLoopResultBuilder]: For program point L101(lines 101 423) no Hoare annotation was computed. [2021-10-20 05:29:11,822 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:29:11,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:29:11 BoogieIcfgContainer [2021-10-20 05:29:11,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:29:11,863 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:29:11,863 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:29:11,863 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:29:11,864 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:29:01" (3/4) ... [2021-10-20 05:29:11,866 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 05:29:11,892 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 115 nodes and edges [2021-10-20 05:29:11,894 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-20 05:29:11,896 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-20 05:29:11,898 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 05:29:12,017 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:29:12,017 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:29:12,019 INFO L168 Benchmark]: Toolchain (without parser) took 14450.24 ms. Allocated memory was 104.9 MB in the beginning and 186.6 MB in the end (delta: 81.8 MB). Free memory was 64.8 MB in the beginning and 63.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 83.8 MB. Max. memory is 16.1 GB. [2021-10-20 05:29:12,019 INFO L168 Benchmark]: CDTParser took 1.23 ms. Allocated memory is still 104.9 MB. Free memory was 83.6 MB in the beginning and 83.5 MB in the end (delta: 60.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:29:12,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 795.78 ms. Allocated memory is still 104.9 MB. Free memory was 64.6 MB in the beginning and 63.9 MB in the end (delta: 747.1 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-20 05:29:12,020 INFO L168 Benchmark]: Boogie Procedure Inliner took 137.66 ms. Allocated memory is still 104.9 MB. Free memory was 63.9 MB in the beginning and 58.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:29:12,020 INFO L168 Benchmark]: Boogie Preprocessor took 100.50 ms. Allocated memory is still 104.9 MB. Free memory was 58.5 MB in the beginning and 54.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:29:12,021 INFO L168 Benchmark]: RCFGBuilder took 2580.92 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 54.3 MB in the beginning and 58.1 MB in the end (delta: -3.8 MB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:29:12,021 INFO L168 Benchmark]: TraceAbstraction took 10669.71 ms. Allocated memory was 125.8 MB in the beginning and 186.6 MB in the end (delta: 60.8 MB). Free memory was 58.1 MB in the beginning and 78.2 MB in the end (delta: -20.1 MB). Peak memory consumption was 42.6 MB. Max. memory is 16.1 GB. [2021-10-20 05:29:12,022 INFO L168 Benchmark]: Witness Printer took 154.35 ms. Allocated memory is still 186.6 MB. Free memory was 78.2 MB in the beginning and 63.6 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-20 05:29:12,024 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.23 ms. Allocated memory is still 104.9 MB. Free memory was 83.6 MB in the beginning and 83.5 MB in the end (delta: 60.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 795.78 ms. Allocated memory is still 104.9 MB. Free memory was 64.6 MB in the beginning and 63.9 MB in the end (delta: 747.1 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 137.66 ms. Allocated memory is still 104.9 MB. Free memory was 63.9 MB in the beginning and 58.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 100.50 ms. Allocated memory is still 104.9 MB. Free memory was 58.5 MB in the beginning and 54.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2580.92 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 54.3 MB in the beginning and 58.1 MB in the end (delta: -3.8 MB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10669.71 ms. Allocated memory was 125.8 MB in the beginning and 186.6 MB in the end (delta: 60.8 MB). Free memory was 58.1 MB in the beginning and 78.2 MB in the end (delta: -20.1 MB). Peak memory consumption was 42.6 MB. Max. memory is 16.1 GB. * Witness Printer took 154.35 ms. Allocated memory is still 186.6 MB. Free memory was 78.2 MB in the beginning and 63.6 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 551]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10545.8ms, OverallIterations: 12, TraceHistogramMax: 4, EmptinessCheckTime: 75.7ms, AutomataDifference: 4154.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 285.0ms, InitialAbstractionConstructionTime: 16.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 790 SDtfs, 865 SDslu, 84 SDs, 0 SdLazy, 2852 SolverSat, 561 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2817.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 927 GetRequests, 901 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 123.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=723occurred in iteration=5, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 264.8ms AutomataMinimizationTime, 12 MinimizatonAttempts, 162 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 39 NumberOfFragments, 229 HoareAnnotationTreeSize, 3 FomulaSimplifications, 362 FormulaSimplificationTreeSizeReduction, 38.2ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 96 FormulaSimplificationTreeSizeReductionInter, 239.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 167.4ms SsaConstructionTime, 582.3ms SatisfiabilityAnalysisTime, 3680.0ms InterpolantComputationTime, 1982 NumberOfCodeBlocks, 1982 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2412 ConstructedInterpolants, 0 QuantifiedInterpolants, 8742 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1040 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 1273/1398 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 616]: Loop Invariant Derived loop invariant: ((((((((((10 <= a28 && a17 <= 8) && a28 <= 10) && a19 == 1) || ((((a25 == 1 && a17 <= 8) && a28 <= 10) && a19 == 1) && 8 < a28)) || ((((10 <= a28 && a25 == 1) && a17 <= 8) && a28 <= 10) && !(a11 == 1))) || ((a25 == 1 && a17 <= 8) && a28 <= 7)) || ((((a17 <= 8 && a28 <= 10) && a19 == 1) && 8 < a28) && a25 == 0)) || a17 <= 7) || ((a17 <= 8 && a25 == 0) && a28 <= 7)) || (((a25 == 1 && a17 <= 8) && a19 == 1) && !(a11 == 1))) || (((a28 < 10 && a17 <= 8) && !(a11 == 1)) && a25 == 0) - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: ((((((((((10 <= a28 && a17 <= 8) && a28 <= 10) && a19 == 1) || ((((a25 == 1 && a17 <= 8) && a28 <= 10) && a19 == 1) && 8 < a28)) || ((((10 <= a28 && a25 == 1) && a17 <= 8) && a28 <= 10) && !(a11 == 1))) || ((a25 == 1 && a17 <= 8) && a28 <= 7)) || ((((a17 <= 8 && a28 <= 10) && a19 == 1) && 8 < a28) && a25 == 0)) || a17 <= 7) || ((a17 <= 8 && a25 == 0) && a28 <= 7)) || (((a25 == 1 && a17 <= 8) && a19 == 1) && !(a11 == 1))) || (((a28 < 10 && a17 <= 8) && !(a11 == 1)) && a25 == 0) RESULT: Ultimate proved your program to be correct! [2021-10-20 05:29:12,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4ec57a3-72a3-4e64-abee-a271ace9a15e/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...