./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 93e64a210ad8295ef3e6c8bf5a4996e01ec752ae44f5068490e5115d4dda29b5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:46:35,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:46:35,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:46:35,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:46:35,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:46:35,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:46:35,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:46:35,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:46:35,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:46:35,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:46:35,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:46:35,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:46:35,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:46:35,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:46:35,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:46:35,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:46:35,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:46:35,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:46:35,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:46:35,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:46:35,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:46:35,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:46:35,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:46:35,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:46:35,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:46:35,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:46:35,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:46:35,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:46:35,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:46:35,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:46:35,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:46:35,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:46:35,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:46:35,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:46:35,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:46:35,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:46:35,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:46:35,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:46:35,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:46:35,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:46:35,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:46:35,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-21 01:46:35,915 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:46:35,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:46:35,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:46:35,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:46:35,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:46:35,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:46:35,924 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:46:35,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:46:35,925 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:46:35,925 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:46:35,926 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:46:35,926 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:46:35,926 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:46:35,927 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:46:35,927 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:46:35,927 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:46:35,927 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:46:35,928 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:46:35,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:46:35,929 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:46:35,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:46:35,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:46:35,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:46:35,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:46:35,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:46:35,930 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 01:46:35,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:46:35,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:46:35,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:46:35,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:46:35,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:46:35,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:46:35,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:46:35,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:46:35,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:46:35,934 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:46:35,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:46:35,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:46:35,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:46:35,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:46:35,936 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_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93e64a210ad8295ef3e6c8bf5a4996e01ec752ae44f5068490e5115d4dda29b5 [2021-11-21 01:46:36,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:46:36,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:46:36,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:46:36,252 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:46:36,252 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:46:36,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c [2021-11-21 01:46:36,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/data/5903160e6/b6e1eb547b174d44a1ba1c5ef205c6a3/FLAG8f2301bb6 [2021-11-21 01:46:36,786 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:46:36,787 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c [2021-11-21 01:46:36,798 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/data/5903160e6/b6e1eb547b174d44a1ba1c5ef205c6a3/FLAG8f2301bb6 [2021-11-21 01:46:37,164 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/data/5903160e6/b6e1eb547b174d44a1ba1c5ef205c6a3 [2021-11-21 01:46:37,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:46:37,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:46:37,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:46:37,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:46:37,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:46:37,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e49e410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37, skipping insertion in model container [2021-11-21 01:46:37,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:46:37,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:46:37,424 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c[938,951] [2021-11-21 01:46:37,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:46:37,440 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:46:37,462 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c[938,951] [2021-11-21 01:46:37,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:46:37,478 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:46:37,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37 WrapperNode [2021-11-21 01:46:37,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:46:37,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:46:37,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:46:37,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:46:37,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,520 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2021-11-21 01:46:37,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:46:37,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:46:37,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:46:37,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:46:37,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:46:37,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:46:37,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:46:37,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:46:37,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (1/1) ... [2021-11-21 01:46:37,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:46:37,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:37,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:46:37,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:46:37,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:46:37,648 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-11-21 01:46:37,648 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-11-21 01:46:37,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:46:37,648 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-11-21 01:46:37,648 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-11-21 01:46:37,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:46:37,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:46:37,714 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:46:37,716 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:46:37,896 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:46:37,930 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:46:37,930 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:46:37,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:46:37 BoogieIcfgContainer [2021-11-21 01:46:37,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:46:37,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:46:37,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:46:37,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:46:37,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:46:37" (1/3) ... [2021-11-21 01:46:37,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de778df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:46:37, skipping insertion in model container [2021-11-21 01:46:37,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:46:37" (2/3) ... [2021-11-21 01:46:37,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de778df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:46:37, skipping insertion in model container [2021-11-21 01:46:37,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:46:37" (3/3) ... [2021-11-21 01:46:37,946 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-2.c [2021-11-21 01:46:37,951 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:46:37,965 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-21 01:46:38,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:46:38,053 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:46:38,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-21 01:46:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:46:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:46:38,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:38,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:38,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:46:38,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:38,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1447800305, now seen corresponding path program 1 times [2021-11-21 01:46:38,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:38,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764321512] [2021-11-21 01:46:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:38,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:38,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764321512] [2021-11-21 01:46:38,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764321512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:38,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:38,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:46:38,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522399483] [2021-11-21 01:46:38,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:38,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:46:38,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:38,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:46:38,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:38,287 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:38,370 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-21 01:46:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:46:38,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:46:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:38,380 INFO L225 Difference]: With dead ends: 41 [2021-11-21 01:46:38,380 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 01:46:38,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:46:38,387 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:38,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 82 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:46:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 01:46:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-21 01:46:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-21 01:46:38,421 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2021-11-21 01:46:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:38,422 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-21 01:46:38,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,422 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-21 01:46:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:46:38,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:38,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:38,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:46:38,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:46:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:38,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1932136437, now seen corresponding path program 1 times [2021-11-21 01:46:38,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:38,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944988676] [2021-11-21 01:46:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:38,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:38,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:38,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944988676] [2021-11-21 01:46:38,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944988676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:38,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:38,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:46:38,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33666082] [2021-11-21 01:46:38,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:38,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:46:38,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:46:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:46:38,473 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:38,504 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-11-21 01:46:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:46:38,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:46:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:38,505 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:46:38,506 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 01:46:38,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:46:38,508 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:38,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:46:38,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 01:46:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-21 01:46:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-11-21 01:46:38,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2021-11-21 01:46:38,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:38,515 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-11-21 01:46:38,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,515 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-11-21 01:46:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:46:38,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:38,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:38,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:46:38,517 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:46:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:38,518 INFO L85 PathProgramCache]: Analyzing trace with hash -757908305, now seen corresponding path program 1 times [2021-11-21 01:46:38,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:38,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005408631] [2021-11-21 01:46:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:38,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:38,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:38,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005408631] [2021-11-21 01:46:38,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005408631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:38,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:38,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:46:38,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384442894] [2021-11-21 01:46:38,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:38,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:46:38,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:38,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:46:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:46:38,581 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:38,636 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-21 01:46:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:46:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:46:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:38,638 INFO L225 Difference]: With dead ends: 24 [2021-11-21 01:46:38,638 INFO L226 Difference]: Without dead ends: 22 [2021-11-21 01:46:38,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:46:38,640 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:38,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:46:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-21 01:46:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-21 01:46:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-11-21 01:46:38,667 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2021-11-21 01:46:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:38,668 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-11-21 01:46:38,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-11-21 01:46:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:46:38,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:38,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:38,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:46:38,670 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:46:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:38,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2020320933, now seen corresponding path program 1 times [2021-11-21 01:46:38,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:38,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403699865] [2021-11-21 01:46:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:38,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:38,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:38,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403699865] [2021-11-21 01:46:38,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403699865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:46:38,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:46:38,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:46:38,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594898386] [2021-11-21 01:46:38,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:46:38,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:46:38,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:38,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:46:38,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:46:38,755 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:38,817 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-11-21 01:46:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:46:38,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 01:46:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:38,819 INFO L225 Difference]: With dead ends: 30 [2021-11-21 01:46:38,819 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 01:46:38,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:46:38,821 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:38,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 38 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:46:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 01:46:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-21 01:46:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-11-21 01:46:38,829 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 14 [2021-11-21 01:46:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:38,830 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-11-21 01:46:38,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-11-21 01:46:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 01:46:38,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:38,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:46:38,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:46:38,837 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:46:38,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:38,838 INFO L85 PathProgramCache]: Analyzing trace with hash -275656323, now seen corresponding path program 1 times [2021-11-21 01:46:38,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:38,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66844343] [2021-11-21 01:46:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:38,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:38,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:38,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66844343] [2021-11-21 01:46:38,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66844343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:46:38,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053652663] [2021-11-21 01:46:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:38,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:38,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:38,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:38,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:46:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:39,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:46:39,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:39,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:39,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053652663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:39,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537719773] [2021-11-21 01:46:39,393 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:46:39,393 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:46:39,398 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 01:46:39,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:46:39,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-21 01:46:39,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295124231] [2021-11-21 01:46:39,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:46:39,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:46:39,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:46:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:46:39,403 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:39,606 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-21 01:46:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:46:39,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-21 01:46:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:39,609 INFO L225 Difference]: With dead ends: 49 [2021-11-21 01:46:39,609 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 01:46:39,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:46:39,614 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:39,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 52 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:46:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 01:46:39,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-21 01:46:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-11-21 01:46:39,641 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 20 [2021-11-21 01:46:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:39,642 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-11-21 01:46:39,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-11-21 01:46:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 01:46:39,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:39,645 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-21 01:46:39,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:46:39,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:39,866 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:46:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:39,866 INFO L85 PathProgramCache]: Analyzing trace with hash 980354623, now seen corresponding path program 1 times [2021-11-21 01:46:39,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:39,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832767637] [2021-11-21 01:46:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:39,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:40,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832767637] [2021-11-21 01:46:40,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832767637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:46:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303833283] [2021-11-21 01:46:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:40,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:40,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:40,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:46:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:46:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:40,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:40,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303833283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:40,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890821540] [2021-11-21 01:46:40,635 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:46:40,635 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:46:40,636 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 01:46:40,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:46:40,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-11-21 01:46:40,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627906570] [2021-11-21 01:46:40,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:46:40,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 01:46:40,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:40,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 01:46:40,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:46:40,644 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 28 states, 25 states have (on average 2.52) internal successors, (63), 16 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:41,037 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-11-21 01:46:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 01:46:41,040 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.52) internal successors, (63), 16 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-21 01:46:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:41,041 INFO L225 Difference]: With dead ends: 91 [2021-11-21 01:46:41,041 INFO L226 Difference]: Without dead ends: 89 [2021-11-21 01:46:41,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:46:41,044 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:41,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 65 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:46:41,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-21 01:46:41,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-21 01:46:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 73 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-11-21 01:46:41,059 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 38 [2021-11-21 01:46:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:41,059 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-11-21 01:46:41,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.52) internal successors, (63), 16 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-11-21 01:46:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 01:46:41,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:41,063 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2021-11-21 01:46:41,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:46:41,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:41,290 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:46:41,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:41,290 INFO L85 PathProgramCache]: Analyzing trace with hash 766387127, now seen corresponding path program 2 times [2021-11-21 01:46:41,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:41,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222807272] [2021-11-21 01:46:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:41,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:41,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:41,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222807272] [2021-11-21 01:46:41,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222807272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:46:41,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663819655] [2021-11-21 01:46:41,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:46:41,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:41,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:41,771 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:41,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:46:41,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 01:46:41,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:46:41,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 01:46:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:42,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:42,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663819655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:42,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [807607661] [2021-11-21 01:46:42,954 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:46:42,955 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:46:42,955 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 01:46:42,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:46:42,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2021-11-21 01:46:42,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829376975] [2021-11-21 01:46:42,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:46:42,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-21 01:46:42,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-21 01:46:42,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2021-11-21 01:46:42,962 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 56 states, 53 states have (on average 2.509433962264151) internal successors, (133), 30 states have internal predecessors, (133), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:43,819 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2021-11-21 01:46:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-21 01:46:43,820 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.509433962264151) internal successors, (133), 30 states have internal predecessors, (133), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-21 01:46:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:43,822 INFO L225 Difference]: With dead ends: 169 [2021-11-21 01:46:43,823 INFO L226 Difference]: Without dead ends: 167 [2021-11-21 01:46:43,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=970, Invalid=5510, Unknown=0, NotChecked=0, Total=6480 [2021-11-21 01:46:43,827 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 260 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:43,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 104 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:46:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-21 01:46:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-11-21 01:46:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 138 states have internal predecessors, (139), 27 states have call successors, (27), 27 states have call predecessors, (27), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2021-11-21 01:46:43,846 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 80 [2021-11-21 01:46:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:43,847 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2021-11-21 01:46:43,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.509433962264151) internal successors, (133), 30 states have internal predecessors, (133), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2021-11-21 01:46:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-21 01:46:43,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:43,856 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1] [2021-11-21 01:46:43,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:46:44,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:44,082 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:46:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:44,082 INFO L85 PathProgramCache]: Analyzing trace with hash 172823219, now seen corresponding path program 2 times [2021-11-21 01:46:44,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:44,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865215606] [2021-11-21 01:46:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:44,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:45,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:45,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865215606] [2021-11-21 01:46:45,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865215606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:46:45,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614732398] [2021-11-21 01:46:45,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:46:45,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:45,245 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:45,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:46:45,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-21 01:46:45,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:46:45,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-21 01:46:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:45,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:48,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614732398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:46:48,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778017260] [2021-11-21 01:46:48,031 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:46:48,031 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:46:48,031 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 01:46:48,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:46:48,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2021-11-21 01:46:48,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720720670] [2021-11-21 01:46:48,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:46:48,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-21 01:46:48,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:46:48,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-21 01:46:48,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=10042, Unknown=0, NotChecked=0, Total=11556 [2021-11-21 01:46:48,043 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 108 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 56 states have internal predecessors, (263), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:46:50,179 INFO L93 Difference]: Finished difference Result 331 states and 356 transitions. [2021-11-21 01:46:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-21 01:46:50,180 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 56 states have internal predecessors, (263), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-21 01:46:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:46:50,183 INFO L225 Difference]: With dead ends: 331 [2021-11-21 01:46:50,183 INFO L226 Difference]: Without dead ends: 329 [2021-11-21 01:46:50,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7600 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3672, Invalid=21768, Unknown=0, NotChecked=0, Total=25440 [2021-11-21 01:46:50,193 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 696 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:46:50,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 95 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:46:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-21 01:46:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2021-11-21 01:46:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 272 states have (on average 1.0073529411764706) internal successors, (274), 273 states have internal predecessors, (274), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2021-11-21 01:46:50,224 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 158 [2021-11-21 01:46:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:46:50,225 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2021-11-21 01:46:50,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 56 states have internal predecessors, (263), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:46:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2021-11-21 01:46:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-21 01:46:50,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:46:50,235 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1] [2021-11-21 01:46:50,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:46:50,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:46:50,462 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:46:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:46:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1156968801, now seen corresponding path program 3 times [2021-11-21 01:46:50,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:46:50,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759232593] [2021-11-21 01:46:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:46:50,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:46:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:46:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:53,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:46:53,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759232593] [2021-11-21 01:46:53,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759232593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:46:53,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104025651] [2021-11-21 01:46:53,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:46:53,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:46:53,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:46:53,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:46:53,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:46:53,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:46:53,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:46:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-21 01:46:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:46:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:54,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:01,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104025651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:01,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303125793] [2021-11-21 01:47:01,312 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:47:01,312 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:01,312 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 01:47:01,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:47:01,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 215 [2021-11-21 01:47:01,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417845484] [2021-11-21 01:47:01,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:47:01,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2021-11-21 01:47:01,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:01,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2021-11-21 01:47:01,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5944, Invalid=40496, Unknown=0, NotChecked=0, Total=46440 [2021-11-21 01:47:01,329 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand has 216 states, 213 states have (on average 2.5023474178403755) internal successors, (533), 110 states have internal predecessors, (533), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:47:07,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:07,978 INFO L93 Difference]: Finished difference Result 649 states and 700 transitions. [2021-11-21 01:47:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2021-11-21 01:47:07,980 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 213 states have (on average 2.5023474178403755) internal successors, (533), 110 states have internal predecessors, (533), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 320 [2021-11-21 01:47:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:07,984 INFO L225 Difference]: With dead ends: 649 [2021-11-21 01:47:07,984 INFO L226 Difference]: Without dead ends: 647 [2021-11-21 01:47:07,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32497 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=14530, Invalid=88190, Unknown=0, NotChecked=0, Total=102720 [2021-11-21 01:47:07,995 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 2028 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:07,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 129 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:47:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-21 01:47:08,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 646. [2021-11-21 01:47:08,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 537 states have (on average 1.0037243947858474) internal successors, (539), 538 states have internal predecessors, (539), 107 states have call successors, (107), 107 states have call predecessors, (107), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:47:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 646 transitions. [2021-11-21 01:47:08,043 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 646 transitions. Word has length 320 [2021-11-21 01:47:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:08,044 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 646 transitions. [2021-11-21 01:47:08,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 213 states have (on average 2.5023474178403755) internal successors, (533), 110 states have internal predecessors, (533), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:47:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 646 transitions. [2021-11-21 01:47:08,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2021-11-21 01:47:08,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:08,067 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 52, 52, 1, 1, 1, 1] [2021-11-21 01:47:08,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:08,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:47:08,290 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:47:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:08,290 INFO L85 PathProgramCache]: Analyzing trace with hash 988138627, now seen corresponding path program 3 times [2021-11-21 01:47:08,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:08,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909374091] [2021-11-21 01:47:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:08,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:18,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909374091] [2021-11-21 01:47:18,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909374091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840408067] [2021-11-21 01:47:18,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:47:18,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:18,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:18,641 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:18,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:47:18,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:47:18,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:47:18,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 214 conjunts are in the unsatisfiable core [2021-11-21 01:47:18,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:20,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:47:43,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840408067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:43,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433074529] [2021-11-21 01:47:43,794 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:47:43,794 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:43,795 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 01:47:43,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:47:43,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2021-11-21 01:47:43,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127377642] [2021-11-21 01:47:43,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:47:43,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 428 states [2021-11-21 01:47:43,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 428 interpolants. [2021-11-21 01:47:43,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23114, Invalid=159642, Unknown=0, NotChecked=0, Total=182756 [2021-11-21 01:47:43,819 INFO L87 Difference]: Start difference. First operand 646 states and 646 transitions. Second operand has 428 states, 425 states have (on average 2.501176470588235) internal successors, (1063), 216 states have internal predecessors, (1063), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:48:09,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:09,237 INFO L93 Difference]: Finished difference Result 1291 states and 1396 transitions. [2021-11-21 01:48:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 428 states. [2021-11-21 01:48:09,240 INFO L78 Accepts]: Start accepts. Automaton has has 428 states, 425 states have (on average 2.501176470588235) internal successors, (1063), 216 states have internal predecessors, (1063), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 638 [2021-11-21 01:48:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:09,246 INFO L225 Difference]: With dead ends: 1291 [2021-11-21 01:48:09,246 INFO L226 Difference]: Without dead ends: 1289 [2021-11-21 01:48:09,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1700 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 638 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132720 ImplicationChecksByTransitivity, 50.0s TimeCoverageRelationStatistics Valid=57352, Invalid=351608, Unknown=0, NotChecked=0, Total=408960 [2021-11-21 01:48:09,264 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5116 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5116 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:09,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5116 Valid, 111 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 01:48:09,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-11-21 01:48:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1288. [2021-11-21 01:48:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1072 states have (on average 1.001865671641791) internal successors, (1074), 1073 states have internal predecessors, (1074), 214 states have call successors, (214), 214 states have call predecessors, (214), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:48:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1288 transitions. [2021-11-21 01:48:09,326 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1288 transitions. Word has length 638 [2021-11-21 01:48:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:09,328 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 1288 transitions. [2021-11-21 01:48:09,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 428 states, 425 states have (on average 2.501176470588235) internal successors, (1063), 216 states have internal predecessors, (1063), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:48:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1288 transitions. [2021-11-21 01:48:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1281 [2021-11-21 01:48:09,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:09,399 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 106, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1] [2021-11-21 01:48:09,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 01:48:09,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:48:09,626 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:48:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:09,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1936467393, now seen corresponding path program 4 times [2021-11-21 01:48:09,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:48:09,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038374607] [2021-11-21 01:48:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:09,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:48:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:49,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:48:49,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038374607] [2021-11-21 01:48:49,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038374607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:48:49,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786185625] [2021-11-21 01:48:49,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:48:49,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:49,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:49,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:49,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:48:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:49,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 2158 conjuncts, 428 conjunts are in the unsatisfiable core [2021-11-21 01:48:49,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:52,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:23,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786185625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:23,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527683841] [2021-11-21 01:50:23,629 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-21 01:50:23,629 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:50:23,630 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 01:50:23,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:50:23,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [428, 428, 428] total 855 [2021-11-21 01:50:23,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035933410] [2021-11-21 01:50:23,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:23,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 856 states [2021-11-21 01:50:23,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:50:23,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 856 interpolants. [2021-11-21 01:50:23,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92024, Invalid=639856, Unknown=0, NotChecked=0, Total=731880 [2021-11-21 01:50:23,687 INFO L87 Difference]: Start difference. First operand 1288 states and 1288 transitions. Second operand has 856 states, 853 states have (on average 2.500586166471278) internal successors, (2133), 430 states have internal predecessors, (2133), 426 states have call successors, (426), 426 states have call predecessors, (426), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:52:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:56,987 INFO L93 Difference]: Finished difference Result 2569 states and 2780 transitions. [2021-11-21 01:52:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 854 states. [2021-11-21 01:52:56,989 INFO L78 Accepts]: Start accepts. Automaton has has 856 states, 853 states have (on average 2.500586166471278) internal successors, (2133), 430 states have internal predecessors, (2133), 426 states have call successors, (426), 426 states have call predecessors, (426), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1280 [2021-11-21 01:52:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:57,005 INFO L225 Difference]: With dead ends: 2569 [2021-11-21 01:52:57,006 INFO L226 Difference]: Without dead ends: 2567 [2021-11-21 01:52:57,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3411 GetRequests, 2132 SyntacticMatches, 0 SemanticMatches, 1279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539537 ImplicationChecksByTransitivity, 204.2s TimeCoverageRelationStatistics Valid=228770, Invalid=1410910, Unknown=0, NotChecked=0, Total=1639680 [2021-11-21 01:52:57,089 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9610 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4882 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9610 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 5101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 4882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:57,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9610 Valid, 156 Invalid, 5101 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [219 Valid, 4882 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-21 01:52:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-11-21 01:52:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2566. [2021-11-21 01:52:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2566 states, 2137 states have (on average 1.0009358914365933) internal successors, (2139), 2138 states have internal predecessors, (2139), 427 states have call successors, (427), 427 states have call predecessors, (427), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:52:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 2566 transitions. [2021-11-21 01:52:57,202 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 2566 transitions. Word has length 1280 [2021-11-21 01:52:57,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:57,205 INFO L470 AbstractCegarLoop]: Abstraction has 2566 states and 2566 transitions. [2021-11-21 01:52:57,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 856 states, 853 states have (on average 2.500586166471278) internal successors, (2133), 430 states have internal predecessors, (2133), 426 states have call successors, (426), 426 states have call predecessors, (426), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:52:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 2566 transitions. [2021-11-21 01:52:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2559 [2021-11-21 01:52:57,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:57,253 INFO L514 BasicCegarLoop]: trace histogram [213, 213, 213, 213, 213, 213, 213, 213, 213, 213, 212, 212, 1, 1, 1, 1] [2021-11-21 01:52:57,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:52:57,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:57,454 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-21 01:52:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1792095171, now seen corresponding path program 4 times [2021-11-21 01:52:57,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:52:57,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46117991] [2021-11-21 01:52:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:52:57,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:53:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 270724 backedges. 0 proven. 270724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:55:35,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:35,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46117991] [2021-11-21 01:55:35,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46117991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:55:35,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279604578] [2021-11-21 01:55:35,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:55:35,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:55:35,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:35,677 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:55:35,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962bbe68-e6e3-4781-8fd7-8fcc5808a2cf/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:55:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:36,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 4288 conjuncts, 854 conjunts are in the unsatisfiable core [2021-11-21 01:55:36,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:55:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 270724 backedges. 0 proven. 270724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:55:43,300 INFO L328 TraceCheckSpWp]: Computing backward predicates...