./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7 --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 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:51:22,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:51:22,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:51:22,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:51:22,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:51:22,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:51:22,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:51:22,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:51:22,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:51:22,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:51:22,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:51:22,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:51:22,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:51:22,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:51:22,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:51:22,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:51:22,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:51:22,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:51:22,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:51:22,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:51:22,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:51:22,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:51:22,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:51:22,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:51:22,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:51:22,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:51:22,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:51:22,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:51:22,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:51:22,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:51:22,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:51:22,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:51:22,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:51:22,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:51:22,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:51:22,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:51:22,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:51:22,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:51:22,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:51:22,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:51:22,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:51:22,567 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-25 17:51:22,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:51:22,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:51:22,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:51:22,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:51:22,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:51:22,591 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:51:22,591 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:51:22,591 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:51:22,591 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:51:22,591 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:51:22,592 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:51:22,592 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:51:22,592 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:51:22,592 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:51:22,592 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:51:22,592 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:51:22,593 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:51:22,593 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:51:22,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:51:22,594 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 17:51:22,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:51:22,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:51:22,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:51:22,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:51:22,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:51:22,595 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 17:51:22,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:51:22,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:51:22,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:51:22,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:51:22,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:51:22,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:51:22,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:51:22,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:51:22,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:51:22,599 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:51:22,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:51:22,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:51:22,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:51:22,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:51:22,600 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_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93e64a210ad8295ef3e6c8bf5a4996e01ec752ae44f5068490e5115d4dda29b5 [2021-11-25 17:51:22,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:51:22,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:51:22,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:51:22,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:51:22,921 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:51:22,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c [2021-11-25 17:51:23,019 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/data/109ea1cc5/14db205d01d94eec8d941b4ff39da792/FLAG242a567dc [2021-11-25 17:51:23,410 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:51:23,410 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c [2021-11-25 17:51:23,417 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/data/109ea1cc5/14db205d01d94eec8d941b4ff39da792/FLAG242a567dc [2021-11-25 17:51:23,809 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/data/109ea1cc5/14db205d01d94eec8d941b4ff39da792 [2021-11-25 17:51:23,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:51:23,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:51:23,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:51:23,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:51:23,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:51:23,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:23" (1/1) ... [2021-11-25 17:51:23,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157361ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:23, skipping insertion in model container [2021-11-25 17:51:23,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:23" (1/1) ... [2021-11-25 17:51:23,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:51:23,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:51:23,982 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c[938,951] [2021-11-25 17:51:23,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:51:23,990 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:51:24,005 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c[938,951] [2021-11-25 17:51:24,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:51:24,019 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:51:24,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24 WrapperNode [2021-11-25 17:51:24,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:51:24,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:51:24,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:51:24,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:51:24,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (1/1) ... [2021-11-25 17:51:24,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (1/1) ... [2021-11-25 17:51:24,052 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2021-11-25 17:51:24,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:51:24,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:51:24,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:51:24,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:51:24,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (1/1) ... [2021-11-25 17:51:24,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (1/1) ... [2021-11-25 17:51:24,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (1/1) ... [2021-11-25 17:51:24,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (1/1) ... [2021-11-25 17:51:24,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (1/1) ... [2021-11-25 17:51:24,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (1/1) ... [2021-11-25 17:51:24,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (1/1) ... [2021-11-25 17:51:24,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:51:24,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:51:24,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:51:24,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:51:24,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (1/1) ... [2021-11-25 17:51:24,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:51:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:24,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:51:24,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:51:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:51:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-11-25 17:51:24,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-11-25 17:51:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:51:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-11-25 17:51:24,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-11-25 17:51:24,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:51:24,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:51:24,246 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:51:24,249 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:51:24,412 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:51:24,437 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:51:24,437 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:51:24,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:24 BoogieIcfgContainer [2021-11-25 17:51:24,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:51:24,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:51:24,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:51:24,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:51:24,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:51:23" (1/3) ... [2021-11-25 17:51:24,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123bf572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:24, skipping insertion in model container [2021-11-25 17:51:24,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:24" (2/3) ... [2021-11-25 17:51:24,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123bf572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:24, skipping insertion in model container [2021-11-25 17:51:24,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:24" (3/3) ... [2021-11-25 17:51:24,448 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-2.c [2021-11-25 17:51:24,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:51:24,454 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 17:51:24,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:51:24,508 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 [2021-11-25 17:51:24,508 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 17:51:24,526 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) [2021-11-25 17:51:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 17:51:24,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:24,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:24,538 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:51:24,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:24,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1447800305, now seen corresponding path program 1 times [2021-11-25 17:51:24,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:24,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994183413] [2021-11-25 17:51:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:24,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:24,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:24,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994183413] [2021-11-25 17:51:24,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994183413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:24,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:24,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:24,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744413478] [2021-11-25 17:51:24,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:24,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:51:24,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:24,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:51:24,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:51:24,771 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) [2021-11-25 17:51:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:24,871 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-11-25 17:51:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:51:24,873 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 [2021-11-25 17:51:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:24,878 INFO L225 Difference]: With dead ends: 41 [2021-11-25 17:51:24,878 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 17:51:24,881 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 [2021-11-25 17:51:24,885 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:24,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 82 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:24,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 17:51:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-25 17:51:24,917 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) [2021-11-25 17:51:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-25 17:51:24,919 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2021-11-25 17:51:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:24,920 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-25 17:51:24,920 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) [2021-11-25 17:51:24,920 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-25 17:51:24,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 17:51:24,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:24,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:24,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:51:24,922 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:51:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1932136437, now seen corresponding path program 1 times [2021-11-25 17:51:24,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:24,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106801891] [2021-11-25 17:51:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:24,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:24,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:24,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106801891] [2021-11-25 17:51:24,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106801891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:24,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:24,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:51:24,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160134698] [2021-11-25 17:51:24,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:24,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:51:24,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:24,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:51:24,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:51:24,970 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) [2021-11-25 17:51:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:25,005 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-11-25 17:51:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:51:25,006 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 [2021-11-25 17:51:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:25,007 INFO L225 Difference]: With dead ends: 26 [2021-11-25 17:51:25,007 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 17:51:25,007 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 [2021-11-25 17:51:25,009 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:25,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 17:51:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-25 17:51:25,015 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) [2021-11-25 17:51:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-11-25 17:51:25,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2021-11-25 17:51:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:25,016 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-11-25 17:51:25,017 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) [2021-11-25 17:51:25,017 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-11-25 17:51:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 17:51:25,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:25,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:25,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:51:25,018 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:51:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:25,019 INFO L85 PathProgramCache]: Analyzing trace with hash -757908305, now seen corresponding path program 1 times [2021-11-25 17:51:25,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:25,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941734948] [2021-11-25 17:51:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:25,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:25,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:25,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941734948] [2021-11-25 17:51:25,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941734948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:25,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:25,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:51:25,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643498913] [2021-11-25 17:51:25,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:25,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:51:25,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:25,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:51:25,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:51:25,086 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) [2021-11-25 17:51:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:25,144 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-25 17:51:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:51:25,145 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 [2021-11-25 17:51:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:25,146 INFO L225 Difference]: With dead ends: 24 [2021-11-25 17:51:25,146 INFO L226 Difference]: Without dead ends: 22 [2021-11-25 17:51:25,146 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 [2021-11-25 17:51:25,148 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:25,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:51:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-25 17:51:25,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-25 17:51:25,154 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) [2021-11-25 17:51:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-11-25 17:51:25,155 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2021-11-25 17:51:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:25,155 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-11-25 17:51:25,155 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) [2021-11-25 17:51:25,155 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-11-25 17:51:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 17:51:25,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:25,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:25,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:51:25,157 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:51:25,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:25,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2020320933, now seen corresponding path program 1 times [2021-11-25 17:51:25,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:25,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415202128] [2021-11-25 17:51:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:25,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:25,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:25,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415202128] [2021-11-25 17:51:25,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415202128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:25,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:25,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:51:25,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904526237] [2021-11-25 17:51:25,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:25,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 17:51:25,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:25,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 17:51:25,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:51:25,227 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) [2021-11-25 17:51:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:25,322 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-11-25 17:51:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:51:25,322 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 [2021-11-25 17:51:25,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:25,323 INFO L225 Difference]: With dead ends: 30 [2021-11-25 17:51:25,324 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 17:51:25,324 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 [2021-11-25 17:51:25,326 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:25,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 38 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 17:51:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-25 17:51:25,333 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) [2021-11-25 17:51:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-11-25 17:51:25,334 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 14 [2021-11-25 17:51:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:25,335 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-11-25 17:51:25,335 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) [2021-11-25 17:51:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-11-25 17:51:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 17:51:25,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:25,336 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:25,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:51:25,337 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:51:25,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:25,338 INFO L85 PathProgramCache]: Analyzing trace with hash -275656323, now seen corresponding path program 1 times [2021-11-25 17:51:25,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:25,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106101187] [2021-11-25 17:51:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:25,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:25,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:25,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106101187] [2021-11-25 17:51:25,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106101187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:25,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992292704] [2021-11-25 17:51:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:25,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:25,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:25,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:25,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:51:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:25,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:51:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:25,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:25,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992292704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:25,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419249048] [2021-11-25 17:51:25,850 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 17:51:25,851 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:25,856 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) [2021-11-25 17:51:25,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:25,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-25 17:51:25,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702734372] [2021-11-25 17:51:25,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:25,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 17:51:25,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:25,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 17:51:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-25 17:51:25,862 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) [2021-11-25 17:51:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:26,046 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-25 17:51:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 17:51:26,047 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 [2021-11-25 17:51:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:26,049 INFO L225 Difference]: With dead ends: 49 [2021-11-25 17:51:26,050 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 17:51:26,051 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 [2021-11-25 17:51:26,062 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:26,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 52 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 17:51:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-25 17:51:26,080 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) [2021-11-25 17:51:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-11-25 17:51:26,083 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 20 [2021-11-25 17:51:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:26,084 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-11-25 17:51:26,085 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) [2021-11-25 17:51:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-11-25 17:51:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 17:51:26,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:26,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-25 17:51:26,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:26,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:26,303 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:51:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash 980354623, now seen corresponding path program 1 times [2021-11-25 17:51:26,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:26,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779813778] [2021-11-25 17:51:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:26,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:26,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:26,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779813778] [2021-11-25 17:51:26,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779813778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:26,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027060261] [2021-11-25 17:51:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:26,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:26,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:26,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:26,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:51:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:26,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 17:51:26,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:26,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:27,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027060261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:27,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773419376] [2021-11-25 17:51:27,016 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 17:51:27,016 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:27,017 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) [2021-11-25 17:51:27,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:27,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-11-25 17:51:27,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776340935] [2021-11-25 17:51:27,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:27,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 17:51:27,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 17:51:27,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-25 17:51:27,029 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) [2021-11-25 17:51:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:27,351 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-11-25 17:51:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 17:51:27,352 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 [2021-11-25 17:51:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:27,365 INFO L225 Difference]: With dead ends: 91 [2021-11-25 17:51:27,365 INFO L226 Difference]: Without dead ends: 89 [2021-11-25 17:51:27,367 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 [2021-11-25 17:51:27,370 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:27,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 65 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-25 17:51:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-25 17:51:27,389 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) [2021-11-25 17:51:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-11-25 17:51:27,396 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 38 [2021-11-25 17:51:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:27,397 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-11-25 17:51:27,398 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) [2021-11-25 17:51:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-11-25 17:51:27,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 17:51:27,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:27,403 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2021-11-25 17:51:27,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:27,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:27,619 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:51:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:27,620 INFO L85 PathProgramCache]: Analyzing trace with hash 766387127, now seen corresponding path program 2 times [2021-11-25 17:51:27,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:27,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634577423] [2021-11-25 17:51:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:27,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:28,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:28,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634577423] [2021-11-25 17:51:28,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634577423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:28,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502598238] [2021-11-25 17:51:28,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:51:28,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:28,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:28,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:28,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 17:51:28,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 17:51:28,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:51:28,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 17:51:28,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:28,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:29,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502598238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:29,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [430375740] [2021-11-25 17:51:29,203 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 17:51:29,203 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:29,204 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) [2021-11-25 17:51:29,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:29,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2021-11-25 17:51:29,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676851341] [2021-11-25 17:51:29,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:29,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-25 17:51:29,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-25 17:51:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 17:51:29,209 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) [2021-11-25 17:51:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:29,986 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2021-11-25 17:51:29,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-25 17:51:29,987 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 [2021-11-25 17:51:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:29,989 INFO L225 Difference]: With dead ends: 169 [2021-11-25 17:51:29,989 INFO L226 Difference]: Without dead ends: 167 [2021-11-25 17:51:29,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=970, Invalid=5510, Unknown=0, NotChecked=0, Total=6480 [2021-11-25 17:51:29,993 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 260 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:29,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 104 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:51:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-25 17:51:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-11-25 17:51:30,014 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) [2021-11-25 17:51:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2021-11-25 17:51:30,017 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 80 [2021-11-25 17:51:30,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:30,020 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2021-11-25 17:51:30,020 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) [2021-11-25 17:51:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2021-11-25 17:51:30,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-25 17:51:30,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:30,026 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1] [2021-11-25 17:51:30,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:30,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:30,250 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:51:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash 172823219, now seen corresponding path program 2 times [2021-11-25 17:51:30,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:30,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835456746] [2021-11-25 17:51:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:30,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:31,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:31,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835456746] [2021-11-25 17:51:31,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835456746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:31,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585498652] [2021-11-25 17:51:31,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:51:31,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:31,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:31,265 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:31,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 17:51:31,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-25 17:51:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:51:31,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 17:51:31,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:31,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:33,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585498652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:33,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963242179] [2021-11-25 17:51:33,853 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 17:51:33,854 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:33,854 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) [2021-11-25 17:51:33,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:33,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2021-11-25 17:51:33,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30918145] [2021-11-25 17:51:33,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:33,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-25 17:51:33,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-25 17:51:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=10042, Unknown=0, NotChecked=0, Total=11556 [2021-11-25 17:51:33,864 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) [2021-11-25 17:51:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:35,858 INFO L93 Difference]: Finished difference Result 331 states and 356 transitions. [2021-11-25 17:51:35,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-25 17:51:35,859 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 [2021-11-25 17:51:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:35,862 INFO L225 Difference]: With dead ends: 331 [2021-11-25 17:51:35,862 INFO L226 Difference]: Without dead ends: 329 [2021-11-25 17:51:35,875 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 [2021-11-25 17:51:35,876 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 696 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:35,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 95 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:51:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-25 17:51:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2021-11-25 17:51:35,907 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) [2021-11-25 17:51:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2021-11-25 17:51:35,909 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 158 [2021-11-25 17:51:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:35,910 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2021-11-25 17:51:35,910 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) [2021-11-25 17:51:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2021-11-25 17:51:35,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-25 17:51:35,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:35,918 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1] [2021-11-25 17:51:35,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:36,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:36,127 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:51:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1156968801, now seen corresponding path program 3 times [2021-11-25 17:51:36,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:36,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352554785] [2021-11-25 17:51:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:36,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:39,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:39,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352554785] [2021-11-25 17:51:39,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352554785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:39,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947580874] [2021-11-25 17:51:39,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:51:39,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:39,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:39,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:39,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 17:51:39,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:51:39,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:51:39,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-25 17:51:39,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:40,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:46,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947580874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:46,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315161289] [2021-11-25 17:51:46,943 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 17:51:46,943 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:51:46,944 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) [2021-11-25 17:51:46,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:51:46,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 215 [2021-11-25 17:51:46,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428647842] [2021-11-25 17:51:46,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:46,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2021-11-25 17:51:46,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2021-11-25 17:51:46,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5944, Invalid=40496, Unknown=0, NotChecked=0, Total=46440 [2021-11-25 17:51:46,955 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) [2021-11-25 17:51:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:53,546 INFO L93 Difference]: Finished difference Result 649 states and 700 transitions. [2021-11-25 17:51:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2021-11-25 17:51:53,546 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 [2021-11-25 17:51:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:53,551 INFO L225 Difference]: With dead ends: 649 [2021-11-25 17:51:53,551 INFO L226 Difference]: Without dead ends: 647 [2021-11-25 17:51:53,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32497 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=14530, Invalid=88190, Unknown=0, NotChecked=0, Total=102720 [2021-11-25 17:51:53,561 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 2028 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:53,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 129 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 17:51:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-25 17:51:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 646. [2021-11-25 17:51:53,596 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) [2021-11-25 17:51:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 646 transitions. [2021-11-25 17:51:53,600 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 646 transitions. Word has length 320 [2021-11-25 17:51:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:53,601 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 646 transitions. [2021-11-25 17:51:53,602 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) [2021-11-25 17:51:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 646 transitions. [2021-11-25 17:51:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2021-11-25 17:51:53,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:53,620 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 52, 52, 1, 1, 1, 1] [2021-11-25 17:51:53,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:53,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:53,843 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:51:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash 988138627, now seen corresponding path program 3 times [2021-11-25 17:51:53,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:53,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098042192] [2021-11-25 17:51:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:53,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:04,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:04,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098042192] [2021-11-25 17:52:04,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098042192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:04,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23756294] [2021-11-25 17:52:04,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:52:04,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:04,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:04,294 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:04,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 17:52:04,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:52:04,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 214 conjunts are in the unsatisfiable core [2021-11-25 17:52:04,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:05,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16484 backedges. 0 proven. 16484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:29,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23756294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:29,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293006105] [2021-11-25 17:52:29,006 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 17:52:29,006 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:29,006 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) [2021-11-25 17:52:29,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:29,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2021-11-25 17:52:29,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383483327] [2021-11-25 17:52:29,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:29,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 428 states [2021-11-25 17:52:29,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:29,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 428 interpolants. [2021-11-25 17:52:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23114, Invalid=159642, Unknown=0, NotChecked=0, Total=182756 [2021-11-25 17:52:29,031 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) [2021-11-25 17:52:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:54,188 INFO L93 Difference]: Finished difference Result 1291 states and 1396 transitions. [2021-11-25 17:52:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 428 states. [2021-11-25 17:52:54,192 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 [2021-11-25 17:52:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:54,200 INFO L225 Difference]: With dead ends: 1291 [2021-11-25 17:52:54,200 INFO L226 Difference]: Without dead ends: 1289 [2021-11-25 17:52:54,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1700 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 638 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132720 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=57352, Invalid=351608, Unknown=0, NotChecked=0, Total=408960 [2021-11-25 17:52:54,220 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5116 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5116 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:54,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5116 Valid, 111 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 17:52:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-11-25 17:52:54,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1288. [2021-11-25 17:52:54,274 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) [2021-11-25 17:52:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1288 transitions. [2021-11-25 17:52:54,281 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1288 transitions. Word has length 638 [2021-11-25 17:52:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:54,282 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 1288 transitions. [2021-11-25 17:52:54,284 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) [2021-11-25 17:52:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1288 transitions. [2021-11-25 17:52:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1281 [2021-11-25 17:52:54,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:54,353 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 106, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1] [2021-11-25 17:52:54,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:54,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 17:52:54,567 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:52:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1936467393, now seen corresponding path program 4 times [2021-11-25 17:52:54,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925075818] [2021-11-25 17:52:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:54,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:33,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:53:33,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925075818] [2021-11-25 17:53:33,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925075818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:53:33,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692583772] [2021-11-25 17:53:33,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 17:53:33,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:33,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:33,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:53:33,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 17:53:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:33,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2158 conjuncts, 428 conjunts are in the unsatisfiable core [2021-11-25 17:53:33,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:36,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:55:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 67310 backedges. 0 proven. 67310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:05,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692583772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:55:05,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937316124] [2021-11-25 17:55:05,609 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 17:55:05,609 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:55:05,610 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) [2021-11-25 17:55:05,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:55:05,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [428, 428, 428] total 855 [2021-11-25 17:55:05,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676580000] [2021-11-25 17:55:05,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:55:05,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 856 states [2021-11-25 17:55:05,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 856 interpolants. [2021-11-25 17:55:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92024, Invalid=639856, Unknown=0, NotChecked=0, Total=731880 [2021-11-25 17:55:05,683 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) [2021-11-25 17:57:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:57:40,706 INFO L93 Difference]: Finished difference Result 2569 states and 2780 transitions. [2021-11-25 17:57:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 854 states. [2021-11-25 17:57:40,708 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 [2021-11-25 17:57:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:57:40,726 INFO L225 Difference]: With dead ends: 2569 [2021-11-25 17:57:40,727 INFO L226 Difference]: Without dead ends: 2567 [2021-11-25 17:57:40,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3411 GetRequests, 2132 SyntacticMatches, 0 SemanticMatches, 1279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539537 ImplicationChecksByTransitivity, 197.9s TimeCoverageRelationStatistics Valid=228770, Invalid=1410910, Unknown=0, NotChecked=0, Total=1639680 [2021-11-25 17:57:40,832 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9610 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4882 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9610 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 5101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 4882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:57:40,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9610 Valid, 156 Invalid, 5101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 4882 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-25 17:57:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-11-25 17:57:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2566. [2021-11-25 17:57:40,930 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) [2021-11-25 17:57:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 2566 transitions. [2021-11-25 17:57:40,941 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 2566 transitions. Word has length 1280 [2021-11-25 17:57:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:57:40,943 INFO L470 AbstractCegarLoop]: Abstraction has 2566 states and 2566 transitions. [2021-11-25 17:57:40,945 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) [2021-11-25 17:57:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 2566 transitions. [2021-11-25 17:57:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2559 [2021-11-25 17:57:40,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:57:40,978 INFO L514 BasicCegarLoop]: trace histogram [213, 213, 213, 213, 213, 213, 213, 213, 213, 213, 212, 212, 1, 1, 1, 1] [2021-11-25 17:57:41,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 17:57:41,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 17:57:41,179 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 17:57:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:57:41,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1792095171, now seen corresponding path program 4 times [2021-11-25 17:57:41,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:57:41,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367793290] [2021-11-25 17:57:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:57:41,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:57:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:00:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 270724 backedges. 0 proven. 270724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:17,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:00:17,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367793290] [2021-11-25 18:00:17,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367793290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:00:17,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361479317] [2021-11-25 18:00:17,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:00:17,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:00:17,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:00:17,349 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:00:17,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_882fb3b5-ff2b-4b6b-b080-1139eedc457b/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:00:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:00:18,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 4288 conjuncts, 854 conjunts are in the unsatisfiable core [2021-11-25 18:00:18,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 270724 backedges. 0 proven. 270724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:00:23,115 INFO L328 TraceCheckSpWp]: Computing backward predicates...