./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8 --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 2078f73240fa6cada48e366db3f43ef0ebe005c4 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:42:42,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:42:42,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:42:42,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:42:42,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:42:42,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:42:42,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:42:42,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:42:42,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:42:42,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:42:42,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:42:42,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:42:42,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:42:42,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:42:42,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:42:42,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:42:42,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:42:42,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:42:42,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:42:42,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:42:42,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:42:42,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:42:42,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:42:42,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:42:42,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:42:42,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:42:42,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:42:42,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:42:42,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:42:42,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:42:42,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:42:42,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:42:42,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:42:42,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:42:42,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:42:42,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:42:42,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:42:42,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:42:42,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:42:42,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:42:42,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:42:42,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:42:42,952 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:42:42,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:42:42,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:42:42,955 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:42:42,955 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:42:42,955 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:42:42,956 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:42:42,962 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:42:42,963 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:42:42,963 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:42:42,964 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:42:42,965 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:42:42,965 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:42:42,965 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:42:42,966 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:42:42,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:42:42,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:42:42,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:42:42,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:42:42,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:42:42,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:42:42,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:42:42,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:42:42,969 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:42:42,969 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:42:42,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:42:42,969 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:42:42,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:42:42,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:42:42,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:42:42,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:42:42,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:42:42,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:42:42,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:42:42,972 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:42:42,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:42:42,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:42:42,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:42:42,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:42:42,973 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_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2078f73240fa6cada48e366db3f43ef0ebe005c4 [2021-10-13 07:42:43,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:42:43,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:42:43,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:42:43,346 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:42:43,347 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:42:43,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c [2021-10-13 07:42:43,433 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/data/49add80c4/0f68e5258ae74ad5a485552c0828727a/FLAG2965ae51d [2021-10-13 07:42:43,987 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:42:43,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c [2021-10-13 07:42:43,995 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/data/49add80c4/0f68e5258ae74ad5a485552c0828727a/FLAG2965ae51d [2021-10-13 07:42:44,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/data/49add80c4/0f68e5258ae74ad5a485552c0828727a [2021-10-13 07:42:44,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:42:44,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:42:44,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:42:44,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:42:44,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:42:44,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70eb09be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44, skipping insertion in model container [2021-10-13 07:42:44,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:42:44,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:42:44,612 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_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c[524,537] [2021-10-13 07:42:44,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:42:44,647 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:42:44,662 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_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound1.c[524,537] [2021-10-13 07:42:44,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:42:44,691 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:42:44,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44 WrapperNode [2021-10-13 07:42:44,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:42:44,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:42:44,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:42:44,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:42:44,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:42:44,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:42:44,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:42:44,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:42:44,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:42:44,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:42:44,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:42:44,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:42:44,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (1/1) ... [2021-10-13 07:42:44,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:42:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:44,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:42:44,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:42:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:42:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:42:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:42:44,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:42:45,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:42:45,364 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 07:42:45,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:45 BoogieIcfgContainer [2021-10-13 07:42:45,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:42:45,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:42:45,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:42:45,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:42:45,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:42:44" (1/3) ... [2021-10-13 07:42:45,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e604b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:42:45, skipping insertion in model container [2021-10-13 07:42:45,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:42:44" (2/3) ... [2021-10-13 07:42:45,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e604b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:42:45, skipping insertion in model container [2021-10-13 07:42:45,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:45" (3/3) ... [2021-10-13 07:42:45,387 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound1.c [2021-10-13 07:42:45,394 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:42:45,394 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:42:45,509 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:42:45,523 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, mConcurrency=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 [2021-10-13 07:42:45,523 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:42:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 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) [2021-10-13 07:42:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:42:45,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:45,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:42:45,552 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:45,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash 108731288, now seen corresponding path program 1 times [2021-10-13 07:42:45,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:42:45,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549623374] [2021-10-13 07:42:45,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:45,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:42:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:45,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:42:45,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549623374] [2021-10-13 07:42:45,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549623374] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:42:45,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:42:45,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:42:45,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560413504] [2021-10-13 07:42:45,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:42:45,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:42:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:42:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:42:45,874 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-13 07:42:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:45,888 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-10-13 07:42:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:42:45,889 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-13 07:42:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:45,896 INFO L225 Difference]: With dead ends: 33 [2021-10-13 07:42:45,896 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 07:42:45,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:42:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 07:42:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 07:42:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 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) [2021-10-13 07:42:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-13 07:42:45,931 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-10-13 07:42:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:45,932 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-13 07:42:45,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-13 07:42:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-13 07:42:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:42:45,933 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:45,933 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:42:45,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:42:45,933 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 107564475, now seen corresponding path program 1 times [2021-10-13 07:42:45,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:42:45,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082293506] [2021-10-13 07:42:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:45,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:42:45,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:42:45,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129497751] [2021-10-13 07:42:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:45,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:45,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:45,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:45,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:42:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:46,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:42:46,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:46,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:46,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:42:46,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082293506] [2021-10-13 07:42:46,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:42:46,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129497751] [2021-10-13 07:42:46,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129497751] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:42:46,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:42:46,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:42:46,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087606704] [2021-10-13 07:42:46,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:42:46,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:42:46,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:42:46,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:42:46,297 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 07:42:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:47,362 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-10-13 07:42:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:42:47,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 5 [2021-10-13 07:42:47,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:47,378 INFO L225 Difference]: With dead ends: 28 [2021-10-13 07:42:47,378 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 07:42:47,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:42:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 07:42:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 13. [2021-10-13 07:42:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-10-13 07:42:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-13 07:42:47,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2021-10-13 07:42:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:47,385 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-13 07:42:47,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 07:42:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-13 07:42:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:42:47,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:47,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:42:47,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:47,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:47,587 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:47,588 INFO L82 PathProgramCache]: Analyzing trace with hash -960496319, now seen corresponding path program 1 times [2021-10-13 07:42:47,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:42:47,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672599967] [2021-10-13 07:42:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:47,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:42:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:47,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:42:47,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672599967] [2021-10-13 07:42:47,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672599967] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:42:47,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:42:47,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:42:47,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360361247] [2021-10-13 07:42:47,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:42:47,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:42:47,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:42:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:42:47,641 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-13 07:42:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:47,659 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-10-13 07:42:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:42:47,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-10-13 07:42:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:47,661 INFO L225 Difference]: With dead ends: 23 [2021-10-13 07:42:47,661 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 07:42:47,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:42:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 07:42:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 07:42:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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) [2021-10-13 07:42:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-13 07:42:47,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 6 [2021-10-13 07:42:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:47,669 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-13 07:42:47,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-13 07:42:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-13 07:42:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:42:47,670 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:47,670 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:47,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:42:47,671 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:47,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash 412581562, now seen corresponding path program 1 times [2021-10-13 07:42:47,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:42:47,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627728807] [2021-10-13 07:42:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:47,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:42:47,689 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:42:47,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967146834] [2021-10-13 07:42:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:47,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:47,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:47,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:42:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:47,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:42:47,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:48,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:48,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:42:48,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627728807] [2021-10-13 07:42:48,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:42:48,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967146834] [2021-10-13 07:42:48,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967146834] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:42:48,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:42:48,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-13 07:42:48,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979210829] [2021-10-13 07:42:48,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:42:48,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:42:48,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:42:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:42:48,908 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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) [2021-10-13 07:42:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:49,635 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-10-13 07:42:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:42:49,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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 8 [2021-10-13 07:42:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:49,636 INFO L225 Difference]: With dead ends: 34 [2021-10-13 07:42:49,637 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 07:42:49,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 857.8ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:42:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 07:42:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 17. [2021-10-13 07:42:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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) [2021-10-13 07:42:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-13 07:42:49,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 8 [2021-10-13 07:42:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:49,644 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-13 07:42:49,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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) [2021-10-13 07:42:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-13 07:42:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:42:49,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:49,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:49,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:49,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:49,869 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:49,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1354046749, now seen corresponding path program 1 times [2021-10-13 07:42:49,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:42:49,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473477631] [2021-10-13 07:42:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:49,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:42:49,890 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:42:49,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624910685] [2021-10-13 07:42:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:49,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:49,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:49,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:49,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 07:42:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:49,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:42:49,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:50,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:50,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:42:50,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473477631] [2021-10-13 07:42:50,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:42:50,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624910685] [2021-10-13 07:42:50,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624910685] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:42:50,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:42:50,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:42:50,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119536808] [2021-10-13 07:42:50,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:42:50,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:42:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:42:50,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:42:50,186 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-13 07:42:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:50,267 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-13 07:42:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:42:50,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 10 [2021-10-13 07:42:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:50,268 INFO L225 Difference]: With dead ends: 27 [2021-10-13 07:42:50,268 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 07:42:50,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:42:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 07:42:50,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-10-13 07:42:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-13 07:42:50,274 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2021-10-13 07:42:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:50,275 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-13 07:42:50,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-13 07:42:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-13 07:42:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:42:50,276 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:50,276 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:50,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:50,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:50,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:50,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1290092996, now seen corresponding path program 1 times [2021-10-13 07:42:50,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:42:50,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621062942] [2021-10-13 07:42:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:50,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:42:50,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:42:50,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742291192] [2021-10-13 07:42:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:50,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:50,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:50,521 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:50,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:42:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:42:50,642 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:42:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:42:50,697 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:42:50,697 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:42:50,698 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:42:50,700 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:42:50,701 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:42:50,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:50,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-13 07:42:50,909 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:42:50,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:42:50 BoogieIcfgContainer [2021-10-13 07:42:50,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:42:50,958 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:42:50,958 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:42:50,958 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:42:50,959 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:42:45" (3/4) ... [2021-10-13 07:42:50,962 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:42:51,034 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:42:51,034 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:42:51,036 INFO L168 Benchmark]: Toolchain (without parser) took 6653.38 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 78.2 MB in the beginning and 81.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:51,036 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 109.1 MB. Free memory is still 62.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:42:51,037 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.16 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 78.2 MB in the beginning and 118.4 MB in the end (delta: -40.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:51,038 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.41 ms. Allocated memory is still 144.7 MB. Free memory was 118.4 MB in the beginning and 116.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:42:51,047 INFO L168 Benchmark]: Boogie Preprocessor took 30.40 ms. Allocated memory is still 144.7 MB. Free memory was 116.8 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:51,048 INFO L168 Benchmark]: RCFGBuilder took 595.64 ms. Allocated memory is still 144.7 MB. Free memory was 115.3 MB in the beginning and 98.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:51,049 INFO L168 Benchmark]: TraceAbstraction took 5587.28 ms. Allocated memory is still 144.7 MB. Free memory was 98.0 MB in the beginning and 83.2 MB in the end (delta: 14.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:51,049 INFO L168 Benchmark]: Witness Printer took 76.03 ms. Allocated memory is still 144.7 MB. Free memory was 83.2 MB in the beginning and 81.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:42:51,052 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 109.1 MB. Free memory is still 62.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 309.16 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 78.2 MB in the beginning and 118.4 MB in the end (delta: -40.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.41 ms. Allocated memory is still 144.7 MB. Free memory was 118.4 MB in the beginning and 116.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.40 ms. Allocated memory is still 144.7 MB. Free memory was 116.8 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 595.64 ms. Allocated memory is still 144.7 MB. Free memory was 115.3 MB in the beginning and 98.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5587.28 ms. Allocated memory is still 144.7 MB. Free memory was 98.0 MB in the beginning and 83.2 MB in the end (delta: 14.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. * Witness Printer took 76.03 ms. Allocated memory is still 144.7 MB. Free memory was 83.2 MB in the beginning and 81.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<1 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND FALSE !(counter++<1) [L12] COND TRUE !(cond) VAL [counter=2] [L14] reach_error() VAL [counter=2] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 5402.6ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 14.1ms, AutomataDifference: 1962.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 93 SDslu, 85 SDs, 0 SdLazy, 104 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1206.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 980.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 40.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 37.1ms SsaConstructionTime, 147.7ms SatisfiabilityAnalysisTime, 1706.9ms InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 49 ConstructedInterpolants, 1 QuantifiedInterpolants, 281 SizeOfPredicates, 29 NumberOfNonLiveVariables, 203 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:42:51,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bf8a9ab-fc6a-41a8-b2ea-b5997872f95a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...