./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF --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-63182f1 [2021-11-12 22:23:51,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:23:51,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:23:51,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:23:51,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:23:51,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:23:51,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:23:51,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:23:51,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:23:51,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:23:51,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:23:51,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:23:51,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:23:51,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:23:51,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:23:51,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:23:51,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:23:51,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:23:51,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:23:51,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:23:51,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:23:51,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:23:51,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:23:51,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:23:51,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:23:51,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:23:51,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:23:51,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:23:51,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:23:51,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:23:51,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:23:51,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:23:51,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:23:51,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:23:51,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:23:51,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:23:51,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:23:51,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:23:51,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:23:51,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:23:51,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:23:51,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-12 22:23:51,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:23:51,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:23:51,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:23:51,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:23:51,944 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:23:51,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:23:51,945 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:23:51,945 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:23:51,945 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:23:51,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:23:51,952 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:23:51,953 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:23:51,953 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:23:51,953 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:23:51,954 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:23:51,954 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:23:51,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:23:51,955 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 22:23:51,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:23:51,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:23:51,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:23:51,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:23:51,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:23:51,956 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-12 22:23:51,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:23:51,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:23:51,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:23:51,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:23:51,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:23:51,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:51,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:23:51,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:23:51,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:23:51,960 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:23:51,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:23:51,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:23:51,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:23:51,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:23:51,961 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_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93e64a210ad8295ef3e6c8bf5a4996e01ec752ae44f5068490e5115d4dda29b5 [2021-11-12 22:23:52,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:23:52,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:23:52,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:23:52,326 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:23:52,327 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:23:52,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c [2021-11-12 22:23:52,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/data/3c9cc2794/b3f1ce441a6f4219a66414f2498e4823/FLAG7aeb23736 [2021-11-12 22:23:52,808 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:23:52,809 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c [2021-11-12 22:23:52,814 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/data/3c9cc2794/b3f1ce441a6f4219a66414f2498e4823/FLAG7aeb23736 [2021-11-12 22:23:53,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/data/3c9cc2794/b3f1ce441a6f4219a66414f2498e4823 [2021-11-12 22:23:53,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:23:53,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:23:53,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:53,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:23:53,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:23:53,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc682e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53, skipping insertion in model container [2021-11-12 22:23:53,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:23:53,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:53,420 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c[938,951] [2021-11-12 22:23:53,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:53,429 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:23:53,445 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c[938,951] [2021-11-12 22:23:53,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:53,459 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:23:53,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53 WrapperNode [2021-11-12 22:23:53,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:53,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:23:53,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:23:53,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:23:53,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:23:53,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:23:53,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:23:53,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:23:53,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:23:53,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:23:53,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:23:53,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:23:53,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:23:53,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:23:53,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:23:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-11-12 22:23:53,612 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-11-12 22:23:53,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:23:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:23:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-11-12 22:23:53,614 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-11-12 22:23:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:23:53,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:23:53,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:23:53,917 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:23:53,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:23:53 BoogieIcfgContainer [2021-11-12 22:23:53,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:23:53,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:23:53,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:23:53,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:23:53,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:23:53" (1/3) ... [2021-11-12 22:23:53,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500374e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:23:53, skipping insertion in model container [2021-11-12 22:23:53,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53" (2/3) ... [2021-11-12 22:23:53,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500374e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:23:53, skipping insertion in model container [2021-11-12 22:23:53,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:23:53" (3/3) ... [2021-11-12 22:23:53,928 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-2.c [2021-11-12 22:23:53,933 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:23:53,934 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-12 22:23:53,981 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:23:53,988 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 [2021-11-12 22:23:53,988 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-12 22:23:54,004 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) [2021-11-12 22:23:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 22:23:54,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:54,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:54,010 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:23:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1447800305, now seen corresponding path program 1 times [2021-11-12 22:23:54,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:23:54,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126262861] [2021-11-12 22:23:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:54,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:23:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:54,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:23:54,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126262861] [2021-11-12 22:23:54,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126262861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:54,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:54,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:23:54,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570474805] [2021-11-12 22:23:54,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:54,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:23:54,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:23:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:23:54,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:23:54,240 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) [2021-11-12 22:23:54,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:54,336 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-12 22:23:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:23:54,339 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 [2021-11-12 22:23:54,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:54,346 INFO L225 Difference]: With dead ends: 41 [2021-11-12 22:23:54,347 INFO L226 Difference]: Without dead ends: 26 [2021-11-12 22:23:54,350 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 [2021-11-12 22:23:54,354 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.49ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.64ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:54,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 82 Invalid, 47 Unknown, 0 Unchecked, 3.49ms Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 53.64ms Time] [2021-11-12 22:23:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-12 22:23:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-12 22:23:54,388 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) [2021-11-12 22:23:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-12 22:23:54,391 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2021-11-12 22:23:54,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:54,391 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-12 22:23:54,391 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) [2021-11-12 22:23:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-12 22:23:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:23:54,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:54,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:54,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:23:54,393 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:23:54,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:54,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1932136437, now seen corresponding path program 1 times [2021-11-12 22:23:54,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:23:54,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589312785] [2021-11-12 22:23:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:54,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:23:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:54,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:23:54,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589312785] [2021-11-12 22:23:54,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589312785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:54,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:54,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:23:54,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372030116] [2021-11-12 22:23:54,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:54,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:23:54,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:23:54,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:23:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:23:54,450 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) [2021-11-12 22:23:54,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:54,519 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-11-12 22:23:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:23:54,520 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 [2021-11-12 22:23:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:54,522 INFO L225 Difference]: With dead ends: 26 [2021-11-12 22:23:54,524 INFO L226 Difference]: Without dead ends: 25 [2021-11-12 22:23:54,524 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 [2021-11-12 22:23:54,526 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:54,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 23 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 47.27ms Time] [2021-11-12 22:23:54,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-12 22:23:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-12 22:23:54,532 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) [2021-11-12 22:23:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-11-12 22:23:54,533 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2021-11-12 22:23:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:54,533 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-11-12 22:23:54,534 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) [2021-11-12 22:23:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-11-12 22:23:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 22:23:54,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:54,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:54,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:23:54,535 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:23:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash -757908305, now seen corresponding path program 1 times [2021-11-12 22:23:54,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:23:54,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283475908] [2021-11-12 22:23:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:54,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:23:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:54,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:23:54,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283475908] [2021-11-12 22:23:54,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283475908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:54,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:54,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 22:23:54,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293890588] [2021-11-12 22:23:54,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:54,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:23:54,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:23:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:23:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:23:54,682 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) [2021-11-12 22:23:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:54,758 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-12 22:23:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:23:54,759 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 [2021-11-12 22:23:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:54,760 INFO L225 Difference]: With dead ends: 24 [2021-11-12 22:23:54,760 INFO L226 Difference]: Without dead ends: 22 [2021-11-12 22:23:54,761 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 [2021-11-12 22:23:54,762 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:54,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 60 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 54.65ms Time] [2021-11-12 22:23:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-12 22:23:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-12 22:23:54,768 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) [2021-11-12 22:23:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-11-12 22:23:54,769 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2021-11-12 22:23:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:54,770 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-11-12 22:23:54,770 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) [2021-11-12 22:23:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-11-12 22:23:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 22:23:54,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:54,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:54,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:23:54,772 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:23:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2020320933, now seen corresponding path program 1 times [2021-11-12 22:23:54,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:23:54,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483529867] [2021-11-12 22:23:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:54,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:23:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:54,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:23:54,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483529867] [2021-11-12 22:23:54,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483529867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:23:54,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:23:54,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:23:54,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425852192] [2021-11-12 22:23:54,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:54,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:23:54,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:23:54,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:23:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:23:54,870 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) [2021-11-12 22:23:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:54,953 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-11-12 22:23:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:23:54,953 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 [2021-11-12 22:23:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:54,954 INFO L225 Difference]: With dead ends: 30 [2021-11-12 22:23:54,955 INFO L226 Difference]: Without dead ends: 29 [2021-11-12 22:23:54,955 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 [2021-11-12 22:23:54,957 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:54,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 38 Invalid, 62 Unknown, 0 Unchecked, 1.39ms Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 59.55ms Time] [2021-11-12 22:23:54,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-12 22:23:54,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-12 22:23:54,963 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) [2021-11-12 22:23:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-11-12 22:23:54,965 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 14 [2021-11-12 22:23:54,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:54,965 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-11-12 22:23:54,966 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) [2021-11-12 22:23:54,966 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-11-12 22:23:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 22:23:54,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:54,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:54,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:23:54,968 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:23:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:54,969 INFO L85 PathProgramCache]: Analyzing trace with hash -275656323, now seen corresponding path program 1 times [2021-11-12 22:23:54,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:23:54,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932705343] [2021-11-12 22:23:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:54,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:23:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:55,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:23:55,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932705343] [2021-11-12 22:23:55,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932705343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:23:55,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704134773] [2021-11-12 22:23:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:55,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:23:55,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:23:55,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:23:55,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:23:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:55,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:23:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:55,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:55,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704134773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:23:55,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [359035703] [2021-11-12 22:23:55,509 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-12 22:23:55,509 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:23:55,514 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) [2021-11-12 22:23:55,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:23:55,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-12 22:23:55,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298339713] [2021-11-12 22:23:55,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:23:55,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:23:55,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:23:55,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:23:55,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:23:55,520 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) [2021-11-12 22:23:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:55,662 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-12 22:23:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:23:55,663 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 [2021-11-12 22:23:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:55,664 INFO L225 Difference]: With dead ends: 49 [2021-11-12 22:23:55,664 INFO L226 Difference]: Without dead ends: 47 [2021-11-12 22:23:55,665 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 [2021-11-12 22:23:55,667 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.68ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:55,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 52 Invalid, 118 Unknown, 0 Unchecked, 2.68ms Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 77.42ms Time] [2021-11-12 22:23:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-12 22:23:55,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-12 22:23:55,675 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) [2021-11-12 22:23:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-11-12 22:23:55,683 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 20 [2021-11-12 22:23:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:55,684 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-11-12 22:23:55,684 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) [2021-11-12 22:23:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-11-12 22:23:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-12 22:23:55,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:55,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-12 22:23:55,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:55,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:23:55,904 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:23:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash 980354623, now seen corresponding path program 1 times [2021-11-12 22:23:55,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:23:55,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446806459] [2021-11-12 22:23:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:55,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:23:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:56,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:23:56,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446806459] [2021-11-12 22:23:56,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446806459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:23:56,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939489239] [2021-11-12 22:23:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:56,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:23:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:23:56,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:23:56,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 22:23:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:56,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:23:56,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:56,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:56,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939489239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:23:56,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64831302] [2021-11-12 22:23:56,718 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-12 22:23:56,719 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:23:56,719 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) [2021-11-12 22:23:56,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:23:56,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-11-12 22:23:56,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665341291] [2021-11-12 22:23:56,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:23:56,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-12 22:23:56,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:23:56,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-12 22:23:56,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:23:56,723 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) [2021-11-12 22:23:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:57,078 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-11-12 22:23:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-12 22:23:57,079 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 [2021-11-12 22:23:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:57,080 INFO L225 Difference]: With dead ends: 91 [2021-11-12 22:23:57,080 INFO L226 Difference]: Without dead ends: 89 [2021-11-12 22:23:57,082 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 [2021-11-12 22:23:57,083 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.23ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 169.03ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:57,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 65 Invalid, 217 Unknown, 0 Unchecked, 3.23ms Time], IncrementalHoareTripleChecker [8 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 169.03ms Time] [2021-11-12 22:23:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-12 22:23:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-12 22:23:57,093 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) [2021-11-12 22:23:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-11-12 22:23:57,095 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 38 [2021-11-12 22:23:57,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:57,096 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-11-12 22:23:57,096 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) [2021-11-12 22:23:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-11-12 22:23:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-12 22:23:57,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:57,099 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2021-11-12 22:23:57,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:57,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:23:57,308 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:23:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash 766387127, now seen corresponding path program 2 times [2021-11-12 22:23:57,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:23:57,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973763243] [2021-11-12 22:23:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:57,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:23:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:57,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:23:57,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973763243] [2021-11-12 22:23:57,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973763243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:23:57,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318775099] [2021-11-12 22:23:57,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:23:57,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:23:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:23:57,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:23:57,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 22:23:57,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-12 22:23:57,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:23:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:23:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:58,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:23:58,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318775099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:23:58,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [16558911] [2021-11-12 22:23:58,849 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-12 22:23:58,849 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:23:58,849 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) [2021-11-12 22:23:58,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:23:58,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2021-11-12 22:23:58,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073046834] [2021-11-12 22:23:58,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:23:58,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-12 22:23:58,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:23:58,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-12 22:23:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2021-11-12 22:23:58,854 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) [2021-11-12 22:23:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:59,690 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2021-11-12 22:23:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-12 22:23:59,691 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 [2021-11-12 22:23:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:59,693 INFO L225 Difference]: With dead ends: 169 [2021-11-12 22:23:59,693 INFO L226 Difference]: Without dead ends: 167 [2021-11-12 22:23:59,696 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 [2021-11-12 22:23:59,700 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 260 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.26ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 290.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:59,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 104 Invalid, 424 Unknown, 0 Unchecked, 4.26ms Time], IncrementalHoareTripleChecker [14 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 290.59ms Time] [2021-11-12 22:23:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-12 22:23:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-11-12 22:23:59,731 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) [2021-11-12 22:23:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2021-11-12 22:23:59,737 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 80 [2021-11-12 22:23:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:59,738 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2021-11-12 22:23:59,739 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) [2021-11-12 22:23:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2021-11-12 22:23:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 22:23:59,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:59,745 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1] [2021-11-12 22:23:59,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:59,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:23:59,946 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:23:59,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:59,946 INFO L85 PathProgramCache]: Analyzing trace with hash 172823219, now seen corresponding path program 2 times [2021-11-12 22:23:59,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:23:59,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029563368] [2021-11-12 22:23:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:59,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:24:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:00,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:24:00,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029563368] [2021-11-12 22:24:00,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029563368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:24:00,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691942629] [2021-11-12 22:24:00,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:24:00,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:24:00,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:24:00,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:24:00,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 22:24:01,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-12 22:24:01,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:24:01,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-12 22:24:01,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:01,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:03,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691942629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:03,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1605196567] [2021-11-12 22:24:03,698 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-12 22:24:03,698 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:24:03,698 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) [2021-11-12 22:24:03,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:24:03,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2021-11-12 22:24:03,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644828957] [2021-11-12 22:24:03,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:24:03,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-12 22:24:03,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:24:03,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-12 22:24:03,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=10042, Unknown=0, NotChecked=0, Total=11556 [2021-11-12 22:24:03,708 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) [2021-11-12 22:24:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:05,825 INFO L93 Difference]: Finished difference Result 331 states and 356 transitions. [2021-11-12 22:24:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-12 22:24:05,825 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 [2021-11-12 22:24:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:05,831 INFO L225 Difference]: With dead ends: 331 [2021-11-12 22:24:05,832 INFO L226 Difference]: Without dead ends: 329 [2021-11-12 22:24:05,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7600 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3672, Invalid=21768, Unknown=0, NotChecked=0, Total=25440 [2021-11-12 22:24:05,844 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 696 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 363.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.75ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 513.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:05,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 95 Invalid, 717 Unknown, 0 Unchecked, 6.75ms Time], IncrementalHoareTripleChecker [29 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 513.14ms Time] [2021-11-12 22:24:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-12 22:24:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2021-11-12 22:24:05,869 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) [2021-11-12 22:24:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2021-11-12 22:24:05,872 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 158 [2021-11-12 22:24:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:05,873 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2021-11-12 22:24:05,873 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) [2021-11-12 22:24:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2021-11-12 22:24:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-12 22:24:05,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:05,881 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1] [2021-11-12 22:24:05,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:06,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:24:06,104 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:24:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:06,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1156968801, now seen corresponding path program 3 times [2021-11-12 22:24:06,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:24:06,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499326907] [2021-11-12 22:24:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:06,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:24:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:09,375 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:24:09,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499326907] [2021-11-12 22:24:09,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499326907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:24:09,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866599714] [2021-11-12 22:24:09,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:24:09,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:24:09,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:24:09,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:24:09,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 22:24:09,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:24:09,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:24:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-12 22:24:09,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:10,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:17,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866599714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:17,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009783939] [2021-11-12 22:24:17,293 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-12 22:24:17,294 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:24:17,294 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) [2021-11-12 22:24:17,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:24:17,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 215 [2021-11-12 22:24:17,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447542178] [2021-11-12 22:24:17,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:24:17,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2021-11-12 22:24:17,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:24:17,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2021-11-12 22:24:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5944, Invalid=40496, Unknown=0, NotChecked=0, Total=46440 [2021-11-12 22:24:17,309 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) [2021-11-12 22:24:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:23,940 INFO L93 Difference]: Finished difference Result 649 states and 700 transitions. [2021-11-12 22:24:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2021-11-12 22:24:23,952 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 [2021-11-12 22:24:23,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:23,956 INFO L225 Difference]: With dead ends: 649 [2021-11-12 22:24:23,956 INFO L226 Difference]: Without dead ends: 647 [2021-11-12 22:24:23,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32497 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=14530, Invalid=88190, Unknown=0, NotChecked=0, Total=102720 [2021-11-12 22:24:23,967 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 2028 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 673.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.76ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 909.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:23,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 129 Invalid, 1389 Unknown, 0 Unchecked, 11.76ms Time], IncrementalHoareTripleChecker [58 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 909.76ms Time] [2021-11-12 22:24:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-12 22:24:23,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 646. [2021-11-12 22:24:24,000 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) [2021-11-12 22:24:24,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 646 transitions. [2021-11-12 22:24:24,004 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 646 transitions. Word has length 320 [2021-11-12 22:24:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:24,005 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 646 transitions. [2021-11-12 22:24:24,006 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) [2021-11-12 22:24:24,006 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 646 transitions. [2021-11-12 22:24:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2021-11-12 22:24:24,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:24,023 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 52, 52, 1, 1, 1, 1] [2021-11-12 22:24:24,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-12 22:24:24,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-12 22:24:24,248 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:24:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:24,249 INFO L85 PathProgramCache]: Analyzing trace with hash 988138627, now seen corresponding path program 3 times [2021-11-12 22:24:24,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:24:24,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468644827] [2021-11-12 22:24:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:24,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:24:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:34,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:24:34,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468644827] [2021-11-12 22:24:34,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468644827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:24:34,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599095315] [2021-11-12 22:24:34,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:24:34,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:24:34,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:24:34,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:24:34,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 22:24:35,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:24:35,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:24:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 214 conjunts are in the unsatisfiable core [2021-11-12 22:24:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:24:36,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:25:00,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599095315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:00,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560369033] [2021-11-12 22:25:00,186 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-12 22:25:00,186 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:25:00,187 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) [2021-11-12 22:25:00,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:25:00,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2021-11-12 22:25:00,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028823205] [2021-11-12 22:25:00,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:25:00,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 428 states [2021-11-12 22:25:00,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:25:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 428 interpolants. [2021-11-12 22:25:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23114, Invalid=159642, Unknown=0, NotChecked=0, Total=182756 [2021-11-12 22:25:00,210 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) [2021-11-12 22:25:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:25,785 INFO L93 Difference]: Finished difference Result 1291 states and 1396 transitions. [2021-11-12 22:25:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 428 states. [2021-11-12 22:25:25,788 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 [2021-11-12 22:25:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:25,798 INFO L225 Difference]: With dead ends: 1291 [2021-11-12 22:25:25,798 INFO L226 Difference]: Without dead ends: 1289 [2021-11-12 22:25:25,817 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 [2021-11-12 22:25:25,818 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5116 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1194.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5116 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.27ms SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1589.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:25,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5116 Valid, 111 Invalid, 2584 Unknown, 0 Unchecked, 17.27ms Time], IncrementalHoareTripleChecker [112 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 1589.01ms Time] [2021-11-12 22:25:25,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-11-12 22:25:25,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1288. [2021-11-12 22:25:25,870 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) [2021-11-12 22:25:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1288 transitions. [2021-11-12 22:25:25,877 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1288 transitions. Word has length 638 [2021-11-12 22:25:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:25,878 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 1288 transitions. [2021-11-12 22:25:25,879 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) [2021-11-12 22:25:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1288 transitions. [2021-11-12 22:25:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1281 [2021-11-12 22:25:25,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:25,953 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 106, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1] [2021-11-12 22:25:25,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:26,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-12 22:25:26,179 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:25:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1936467393, now seen corresponding path program 4 times [2021-11-12 22:25:26,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:25:26,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058887706] [2021-11-12 22:25:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:26,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:25:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:05,384 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:05,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058887706] [2021-11-12 22:26:05,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058887706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:26:05,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432024303] [2021-11-12 22:26:05,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:26:05,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:26:05,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:05,404 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:26:05,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 22:26:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 2164 conjuncts, 428 conjunts are in the unsatisfiable core [2021-11-12 22:26:05,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:08,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:39,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432024303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:39,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1284233073] [2021-11-12 22:27:39,671 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-12 22:27:39,671 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:27:39,672 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) [2021-11-12 22:27:39,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:27:39,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [428, 428, 428] total 855 [2021-11-12 22:27:39,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921857445] [2021-11-12 22:27:39,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:27:39,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 856 states [2021-11-12 22:27:39,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:27:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 856 interpolants. [2021-11-12 22:27:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92024, Invalid=639856, Unknown=0, NotChecked=0, Total=731880 [2021-11-12 22:27:39,744 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) [2021-11-12 22:30:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:08,748 INFO L93 Difference]: Finished difference Result 2569 states and 2780 transitions. [2021-11-12 22:30:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 854 states. [2021-11-12 22:30:08,751 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 [2021-11-12 22:30:08,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:08,771 INFO L225 Difference]: With dead ends: 2569 [2021-11-12 22:30:08,771 INFO L226 Difference]: Without dead ends: 2567 [2021-11-12 22:30:08,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3411 GetRequests, 2132 SyntacticMatches, 0 SemanticMatches, 1279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539537 ImplicationChecksByTransitivity, 200.1s TimeCoverageRelationStatistics Valid=228770, Invalid=1410910, Unknown=0, NotChecked=0, Total=1639680 [2021-11-12 22:30:08,883 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9610 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4882 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2567.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9610 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 5101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.15ms SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 4882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3388.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:08,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9610 Valid, 156 Invalid, 5101 Unknown, 0 Unchecked, 52.15ms Time], IncrementalHoareTripleChecker [219 Valid, 4882 Invalid, 0 Unknown, 0 Unchecked, 3388.14ms Time] [2021-11-12 22:30:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-11-12 22:30:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2566. [2021-11-12 22:30:09,017 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) [2021-11-12 22:30:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 2566 transitions. [2021-11-12 22:30:09,032 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 2566 transitions. Word has length 1280 [2021-11-12 22:30:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:09,035 INFO L470 AbstractCegarLoop]: Abstraction has 2566 states and 2566 transitions. [2021-11-12 22:30:09,038 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) [2021-11-12 22:30:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 2566 transitions. [2021-11-12 22:30:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2559 [2021-11-12 22:30:09,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:09,127 INFO L514 BasicCegarLoop]: trace histogram [213, 213, 213, 213, 213, 213, 213, 213, 213, 213, 212, 212, 1, 1, 1, 1] [2021-11-12 22:30:09,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:09,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-12 22:30:09,332 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-12 22:30:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:09,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1792095171, now seen corresponding path program 4 times [2021-11-12 22:30:09,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:30:09,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10357029] [2021-11-12 22:30:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:09,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:30:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 270724 backedges. 0 proven. 270724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:32:55,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:32:55,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10357029] [2021-11-12 22:32:55,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10357029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:32:55,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307658665] [2021-11-12 22:32:55,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:32:55,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:32:55,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:32:55,356 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:32:55,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39008429-48a3-4b92-978c-417094ba7a21/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 22:32:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:56,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 4294 conjuncts, 854 conjunts are in the unsatisfiable core [2021-11-12 22:32:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 270724 backedges. 0 proven. 270724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:33:01,376 INFO L328 TraceCheckSpWp]: Computing backward predicates...