./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh --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 d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:51:30,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:51:30,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:51:30,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:51:30,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:51:30,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:51:30,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:51:30,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:51:30,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:51:30,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:51:30,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:51:30,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:51:30,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:51:30,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:51:30,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:51:30,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:51:30,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:51:30,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:51:30,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:51:30,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:51:30,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:51:30,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:51:30,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:51:30,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:51:30,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:51:30,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:51:30,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:51:30,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:51:30,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:51:30,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:51:30,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:51:30,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:51:30,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:51:30,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:51:30,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:51:30,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:51:30,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:51:30,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:51:30,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:51:30,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:51:30,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:51:30,597 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-12-14 14:51:30,612 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:51:30,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:51:30,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:51:30,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:51:30,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:51:30,621 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:51:30,621 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:51:30,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:51:30,622 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:51:30,622 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:51:30,622 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:51:30,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:51:30,623 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:51:30,623 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:51:30,623 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:51:30,623 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:51:30,624 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:51:30,624 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:51:30,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:51:30,625 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 14:51:30,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:51:30,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:51:30,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:51:30,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:51:30,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:51:30,625 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-14 14:51:30,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:51:30,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:51:30,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:51:30,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:51:30,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:51:30,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:51:30,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:51:30,626 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:51:30,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:51:30,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:51:30,627 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:51:30,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:51:30,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:51:30,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:51:30,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a [2022-12-14 14:51:30,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:51:30,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:51:30,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:51:30,837 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:51:30,837 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:51:30,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2022-12-14 14:51:33,405 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:51:33,521 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:51:33,522 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2022-12-14 14:51:33,526 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/data/0baa48c23/45be6580bf344f80be61b00cc0df35f3/FLAG0720a4af4 [2022-12-14 14:51:33,537 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/data/0baa48c23/45be6580bf344f80be61b00cc0df35f3 [2022-12-14 14:51:33,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:51:33,539 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:51:33,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:51:33,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:51:33,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:51:33,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182c7dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33, skipping insertion in model container [2022-12-14 14:51:33,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:51:33,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:51:33,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:51:33,678 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:51:33,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:51:33,697 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:51:33,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33 WrapperNode [2022-12-14 14:51:33,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:51:33,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:51:33,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:51:33,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:51:33,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,719 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2022-12-14 14:51:33,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:51:33,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:51:33,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:51:33,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:51:33,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,731 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:51:33,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:51:33,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:51:33,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:51:33,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (1/1) ... [2022-12-14 14:51:33,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:51:33,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:51:33,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:51:33,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:51:33,794 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2022-12-14 14:51:33,794 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2022-12-14 14:51:33,795 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2022-12-14 14:51:33,795 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2022-12-14 14:51:33,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:51:33,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:51:33,852 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:51:33,854 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:51:33,952 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:51:33,963 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:51:33,963 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 14:51:33,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:51:33 BoogieIcfgContainer [2022-12-14 14:51:33,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:51:33,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:51:33,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:51:33,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:51:33,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:51:33" (1/3) ... [2022-12-14 14:51:33,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70eb9d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:51:33, skipping insertion in model container [2022-12-14 14:51:33,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:51:33" (2/3) ... [2022-12-14 14:51:33,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70eb9d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:51:33, skipping insertion in model container [2022-12-14 14:51:33,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:51:33" (3/3) ... [2022-12-14 14:51:33,975 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2022-12-14 14:51:33,993 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:51:33,994 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-14 14:51:34,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:51:34,038 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2aba59a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:51:34,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-12-14 14:51:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 25 states have (on average 1.52) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 14:51:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 14:51:34,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:34,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 14:51:34,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1442097593, now seen corresponding path program 1 times [2022-12-14 14:51:34,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:34,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879521045] [2022-12-14 14:51:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:34,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:51:34,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:34,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879521045] [2022-12-14 14:51:34,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879521045] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:34,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:34,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:51:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431857486] [2022-12-14 14:51:34,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:34,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:51:34,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:34,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:51:34,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:51:34,197 INFO L87 Difference]: Start difference. First operand has 44 states, 25 states have (on average 1.52) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-14 14:51:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:34,229 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-12-14 14:51:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:51:34,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-12-14 14:51:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:34,237 INFO L225 Difference]: With dead ends: 46 [2022-12-14 14:51:34,237 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 14:51:34,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:51:34,241 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:34,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 80 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 14:51:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-12-14 14:51:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 14:51:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-12-14 14:51:34,286 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 6 [2022-12-14 14:51:34,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:34,286 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-12-14 14:51:34,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-14 14:51:34,286 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-12-14 14:51:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:51:34,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:34,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:34,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:51:34,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1755352361, now seen corresponding path program 1 times [2022-12-14 14:51:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:34,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789702330] [2022-12-14 14:51:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:34,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:51:34,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789702330] [2022-12-14 14:51:34,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789702330] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:34,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:34,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:51:34,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33532646] [2022-12-14 14:51:34,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:34,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:51:34,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:51:34,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:51:34,348 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2022-12-14 14:51:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:34,405 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-12-14 14:51:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:51:34,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 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 [2022-12-14 14:51:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:34,406 INFO L225 Difference]: With dead ends: 55 [2022-12-14 14:51:34,407 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 14:51:34,407 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:51:34,408 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 28 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:34,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 144 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 14:51:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-12-14 14:51:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 39 states have internal predecessors, (43), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 14:51:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-12-14 14:51:34,419 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 7 [2022-12-14 14:51:34,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:34,419 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-12-14 14:51:34,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2022-12-14 14:51:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-12-14 14:51:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 14:51:34,420 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:34,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:34,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:51:34,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:34,421 INFO L85 PathProgramCache]: Analyzing trace with hash 576061948, now seen corresponding path program 1 times [2022-12-14 14:51:34,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:34,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177122657] [2022-12-14 14:51:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:34,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:51:34,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:34,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177122657] [2022-12-14 14:51:34,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177122657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:34,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:34,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:51:34,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441389121] [2022-12-14 14:51:34,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:34,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:51:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:51:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:51:34,446 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:51:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:34,462 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-12-14 14:51:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:51:34,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 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 11 [2022-12-14 14:51:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:34,463 INFO L225 Difference]: With dead ends: 52 [2022-12-14 14:51:34,463 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 14:51:34,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:51:34,465 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:34,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 67 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 14:51:34,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-12-14 14:51:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 14:51:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-12-14 14:51:34,472 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 11 [2022-12-14 14:51:34,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:34,472 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-12-14 14:51:34,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:51:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-12-14 14:51:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 14:51:34,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:34,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:51:34,473 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash 678051242, now seen corresponding path program 1 times [2022-12-14 14:51:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:34,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778650135] [2022-12-14 14:51:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:51:34,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:34,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778650135] [2022-12-14 14:51:34,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778650135] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:34,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:34,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:51:34,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891017196] [2022-12-14 14:51:34,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:34,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:51:34,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:34,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:51:34,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:51:34,538 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-12-14 14:51:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:34,641 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2022-12-14 14:51:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:51:34,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 12 [2022-12-14 14:51:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:34,642 INFO L225 Difference]: With dead ends: 74 [2022-12-14 14:51:34,643 INFO L226 Difference]: Without dead ends: 73 [2022-12-14 14:51:34,643 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:51:34,644 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:34,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 169 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:51:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-14 14:51:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2022-12-14 14:51:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.372093023255814) internal successors, (59), 50 states have internal predecessors, (59), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 14:51:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2022-12-14 14:51:34,652 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 12 [2022-12-14 14:51:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:34,652 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2022-12-14 14:51:34,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-12-14 14:51:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2022-12-14 14:51:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 14:51:34,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:34,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:34,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:51:34,654 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:34,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1701183343, now seen corresponding path program 1 times [2022-12-14 14:51:34,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:34,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958661731] [2022-12-14 14:51:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:51:34,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:34,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958661731] [2022-12-14 14:51:34,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958661731] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:34,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:34,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:51:34,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829371386] [2022-12-14 14:51:34,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:34,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:51:34,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:34,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:51:34,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:51:34,701 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:51:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:34,752 INFO L93 Difference]: Finished difference Result 128 states and 166 transitions. [2022-12-14 14:51:34,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:51:34,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-12-14 14:51:34,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:34,753 INFO L225 Difference]: With dead ends: 128 [2022-12-14 14:51:34,753 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 14:51:34,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:51:34,755 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:34,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 94 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 14:51:34,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-12-14 14:51:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 52 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-14 14:51:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-12-14 14:51:34,763 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 18 [2022-12-14 14:51:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:34,763 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-12-14 14:51:34,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:51:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-12-14 14:51:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 14:51:34,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:34,764 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:34,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:51:34,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:34,765 INFO L85 PathProgramCache]: Analyzing trace with hash -719559311, now seen corresponding path program 1 times [2022-12-14 14:51:34,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:34,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852886338] [2022-12-14 14:51:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:34,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:51:34,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:34,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852886338] [2022-12-14 14:51:34,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852886338] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:34,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:34,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:51:34,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006758643] [2022-12-14 14:51:34,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:34,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:51:34,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:34,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:51:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:51:34,798 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:51:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:34,829 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2022-12-14 14:51:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:51:34,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-12-14 14:51:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:34,831 INFO L225 Difference]: With dead ends: 90 [2022-12-14 14:51:34,831 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 14:51:34,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:51:34,832 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:34,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 110 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 14:51:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 73. [2022-12-14 14:51:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 56 states have internal predecessors, (65), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-12-14 14:51:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2022-12-14 14:51:34,840 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 19 [2022-12-14 14:51:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:34,841 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2022-12-14 14:51:34,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:51:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2022-12-14 14:51:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 14:51:34,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:34,841 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:34,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:51:34,841 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash -831502117, now seen corresponding path program 1 times [2022-12-14 14:51:34,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:34,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810380347] [2022-12-14 14:51:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:34,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:51:34,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810380347] [2022-12-14 14:51:34,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810380347] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:34,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:34,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:51:34,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505491951] [2022-12-14 14:51:34,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:34,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:51:34,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:51:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:51:34,864 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:51:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:34,877 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-12-14 14:51:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:51:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-12-14 14:51:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:34,879 INFO L225 Difference]: With dead ends: 73 [2022-12-14 14:51:34,879 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 14:51:34,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:51:34,880 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:34,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 14:51:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-12-14 14:51:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 55 states have internal predecessors, (63), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-12-14 14:51:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-12-14 14:51:34,890 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 20 [2022-12-14 14:51:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:34,891 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-12-14 14:51:34,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:51:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-12-14 14:51:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 14:51:34,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:34,892 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:34,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:51:34,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:34,892 INFO L85 PathProgramCache]: Analyzing trace with hash 252324898, now seen corresponding path program 1 times [2022-12-14 14:51:34,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:34,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093705458] [2022-12-14 14:51:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:34,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:51:34,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:34,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093705458] [2022-12-14 14:51:34,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093705458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:34,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:34,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:51:34,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849037786] [2022-12-14 14:51:34,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:34,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:51:34,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:51:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:51:34,953 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:51:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:35,003 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2022-12-14 14:51:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:51:35,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-12-14 14:51:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:35,004 INFO L225 Difference]: With dead ends: 156 [2022-12-14 14:51:35,004 INFO L226 Difference]: Without dead ends: 92 [2022-12-14 14:51:35,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:51:35,006 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:35,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 178 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-14 14:51:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-12-14 14:51:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 62 states have internal predecessors, (68), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2022-12-14 14:51:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2022-12-14 14:51:35,018 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 25 [2022-12-14 14:51:35,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:35,019 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2022-12-14 14:51:35,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 14:51:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2022-12-14 14:51:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 14:51:35,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:35,019 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:35,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:51:35,020 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1845121388, now seen corresponding path program 1 times [2022-12-14 14:51:35,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:35,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851158570] [2022-12-14 14:51:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:35,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:51:35,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:35,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851158570] [2022-12-14 14:51:35,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851158570] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:35,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:35,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:51:35,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123252194] [2022-12-14 14:51:35,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:35,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:51:35,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:35,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:51:35,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:51:35,072 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 14:51:35,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:35,127 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-12-14 14:51:35,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:51:35,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-12-14 14:51:35,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:35,129 INFO L225 Difference]: With dead ends: 168 [2022-12-14 14:51:35,129 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 14:51:35,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:51:35,131 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:35,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 182 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 14:51:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-12-14 14:51:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 67 states have internal predecessors, (73), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 14:51:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-12-14 14:51:35,141 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 36 [2022-12-14 14:51:35,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:35,141 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-12-14 14:51:35,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 14:51:35,141 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-12-14 14:51:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 14:51:35,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:35,142 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:35,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 14:51:35,142 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash -660204944, now seen corresponding path program 1 times [2022-12-14 14:51:35,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:35,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769514237] [2022-12-14 14:51:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:35,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 14:51:35,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:35,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769514237] [2022-12-14 14:51:35,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769514237] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:35,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:35,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:51:35,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130629044] [2022-12-14 14:51:35,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:35,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:51:35,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:35,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:51:35,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:51:35,167 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 14:51:35,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:35,177 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-12-14 14:51:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:51:35,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-12-14 14:51:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:35,178 INFO L225 Difference]: With dead ends: 88 [2022-12-14 14:51:35,178 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 14:51:35,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:51:35,179 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:35,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:35,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 14:51:35,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-12-14 14:51:35,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 66 states have internal predecessors, (71), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 14:51:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-12-14 14:51:35,186 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 38 [2022-12-14 14:51:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:35,186 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-12-14 14:51:35,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 14:51:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-12-14 14:51:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 14:51:35,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:35,187 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:35,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 14:51:35,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:35,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:35,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1008483268, now seen corresponding path program 1 times [2022-12-14 14:51:35,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:35,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770682777] [2022-12-14 14:51:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:35,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:51:35,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:35,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770682777] [2022-12-14 14:51:35,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770682777] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:35,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:35,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:51:35,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90205718] [2022-12-14 14:51:35,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:35,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:51:35,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:35,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:51:35,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:51:35,218 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 14:51:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:35,237 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2022-12-14 14:51:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:51:35,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-12-14 14:51:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:35,239 INFO L225 Difference]: With dead ends: 94 [2022-12-14 14:51:35,239 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 14:51:35,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:51:35,240 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:35,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:35,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 14:51:35,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-12-14 14:51:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 70 states have internal predecessors, (77), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 14:51:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-12-14 14:51:35,249 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 39 [2022-12-14 14:51:35,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:35,249 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-12-14 14:51:35,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 14:51:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-12-14 14:51:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 14:51:35,250 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:35,250 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:35,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 14:51:35,250 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash 409606471, now seen corresponding path program 1 times [2022-12-14 14:51:35,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:35,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774097264] [2022-12-14 14:51:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:35,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:51:35,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:35,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774097264] [2022-12-14 14:51:35,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774097264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:35,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:35,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:51:35,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856509630] [2022-12-14 14:51:35,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:35,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:51:35,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:35,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:51:35,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:51:35,297 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 14:51:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:35,345 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2022-12-14 14:51:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:51:35,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-12-14 14:51:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:35,347 INFO L225 Difference]: With dead ends: 103 [2022-12-14 14:51:35,347 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 14:51:35,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:51:35,348 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:35,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 152 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 14:51:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2022-12-14 14:51:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 69 states have internal predecessors, (75), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 14:51:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2022-12-14 14:51:35,356 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 43 [2022-12-14 14:51:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:35,356 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2022-12-14 14:51:35,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 14:51:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2022-12-14 14:51:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 14:51:35,357 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:35,357 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:35,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 14:51:35,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1420295783, now seen corresponding path program 1 times [2022-12-14 14:51:35,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:35,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084602200] [2022-12-14 14:51:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:35,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 14:51:35,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:35,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084602200] [2022-12-14 14:51:35,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084602200] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:51:35,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594682598] [2022-12-14 14:51:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:35,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:51:35,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:51:35,418 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:51:35,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:51:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:35,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 14:51:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:51:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 14:51:35,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:51:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 14:51:35,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594682598] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:51:35,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722596381] [2022-12-14 14:51:35,654 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-12-14 14:51:35,654 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:51:35,657 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-12-14 14:51:35,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:51:35,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-14 14:51:35,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802039519] [2022-12-14 14:51:35,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:51:35,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 14:51:35,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:35,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 14:51:35,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:51:35,660 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 14:51:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:35,856 INFO L93 Difference]: Finished difference Result 192 states and 248 transitions. [2022-12-14 14:51:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 14:51:35,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2022-12-14 14:51:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:35,857 INFO L225 Difference]: With dead ends: 192 [2022-12-14 14:51:35,857 INFO L226 Difference]: Without dead ends: 190 [2022-12-14 14:51:35,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-12-14 14:51:35,858 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 118 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:35,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 323 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:51:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-14 14:51:35,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 117. [2022-12-14 14:51:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 87 states have internal predecessors, (95), 20 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (34), 22 states have call predecessors, (34), 19 states have call successors, (34) [2022-12-14 14:51:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 149 transitions. [2022-12-14 14:51:35,868 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 149 transitions. Word has length 42 [2022-12-14 14:51:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:35,868 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 149 transitions. [2022-12-14 14:51:35,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 14:51:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 149 transitions. [2022-12-14 14:51:35,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 14:51:35,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:35,869 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:35,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:51:36,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 14:51:36,071 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -895915619, now seen corresponding path program 1 times [2022-12-14 14:51:36,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:36,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347562601] [2022-12-14 14:51:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:36,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:51:36,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:36,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347562601] [2022-12-14 14:51:36,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347562601] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:36,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:36,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:51:36,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061319982] [2022-12-14 14:51:36,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:36,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:51:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:36,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:51:36,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:51:36,177 INFO L87 Difference]: Start difference. First operand 117 states and 149 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 14:51:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:36,226 INFO L93 Difference]: Finished difference Result 131 states and 171 transitions. [2022-12-14 14:51:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:51:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-12-14 14:51:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:36,228 INFO L225 Difference]: With dead ends: 131 [2022-12-14 14:51:36,228 INFO L226 Difference]: Without dead ends: 130 [2022-12-14 14:51:36,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:51:36,229 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:36,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 105 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-14 14:51:36,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-12-14 14:51:36,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 94 states have internal predecessors, (103), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (40), 25 states have call predecessors, (40), 19 states have call successors, (40) [2022-12-14 14:51:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-12-14 14:51:36,239 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 44 [2022-12-14 14:51:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:36,239 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-12-14 14:51:36,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 14:51:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-12-14 14:51:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 14:51:36,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:36,240 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:36,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 14:51:36,241 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:36,241 INFO L85 PathProgramCache]: Analyzing trace with hash 410724216, now seen corresponding path program 1 times [2022-12-14 14:51:36,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:36,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230371356] [2022-12-14 14:51:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:36,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:51:36,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:36,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230371356] [2022-12-14 14:51:36,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230371356] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:51:36,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578030082] [2022-12-14 14:51:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:36,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:51:36,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:51:36,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:51:36,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:51:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:36,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:51:36,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:51:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 14:51:36,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:51:36,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578030082] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:36,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:51:36,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2022-12-14 14:51:36,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714115451] [2022-12-14 14:51:36,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:36,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:51:36,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:51:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:51:36,381 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 14:51:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:36,461 INFO L93 Difference]: Finished difference Result 161 states and 206 transitions. [2022-12-14 14:51:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 14:51:36,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-12-14 14:51:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:36,463 INFO L225 Difference]: With dead ends: 161 [2022-12-14 14:51:36,463 INFO L226 Difference]: Without dead ends: 160 [2022-12-14 14:51:36,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 14:51:36,464 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 28 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:36,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 164 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-14 14:51:36,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-12-14 14:51:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 114 states have internal predecessors, (125), 25 states have call successors, (25), 8 states have call predecessors, (25), 14 states have return successors, (47), 31 states have call predecessors, (47), 24 states have call successors, (47) [2022-12-14 14:51:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 197 transitions. [2022-12-14 14:51:36,478 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 197 transitions. Word has length 49 [2022-12-14 14:51:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:36,478 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 197 transitions. [2022-12-14 14:51:36,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 14:51:36,478 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 197 transitions. [2022-12-14 14:51:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 14:51:36,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:36,479 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:36,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:51:36,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:51:36,680 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:36,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:36,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2003580343, now seen corresponding path program 1 times [2022-12-14 14:51:36,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:36,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486835431] [2022-12-14 14:51:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:36,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:51:36,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:36,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486835431] [2022-12-14 14:51:36,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486835431] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:36,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:36,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:51:36,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110321930] [2022-12-14 14:51:36,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:36,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:51:36,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:36,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:51:36,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:51:36,708 INFO L87 Difference]: Start difference. First operand 154 states and 197 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 14:51:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:36,719 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2022-12-14 14:51:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:51:36,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2022-12-14 14:51:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:36,720 INFO L225 Difference]: With dead ends: 154 [2022-12-14 14:51:36,721 INFO L226 Difference]: Without dead ends: 150 [2022-12-14 14:51:36,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:51:36,721 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:36,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 71 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-14 14:51:36,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-12-14 14:51:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 111 states have internal predecessors, (119), 25 states have call successors, (25), 8 states have call predecessors, (25), 14 states have return successors, (45), 30 states have call predecessors, (45), 24 states have call successors, (45) [2022-12-14 14:51:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 189 transitions. [2022-12-14 14:51:36,729 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 189 transitions. Word has length 45 [2022-12-14 14:51:36,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:36,729 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 189 transitions. [2022-12-14 14:51:36,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 14:51:36,729 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 189 transitions. [2022-12-14 14:51:36,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 14:51:36,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:36,730 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:36,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 14:51:36,730 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1224623314, now seen corresponding path program 1 times [2022-12-14 14:51:36,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:36,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460036277] [2022-12-14 14:51:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:36,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-12-14 14:51:36,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:36,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460036277] [2022-12-14 14:51:36,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460036277] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:36,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:51:36,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 14:51:36,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259197731] [2022-12-14 14:51:36,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:36,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:51:36,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:51:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:51:36,805 INFO L87 Difference]: Start difference. First operand 150 states and 189 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 14:51:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:36,863 INFO L93 Difference]: Finished difference Result 150 states and 189 transitions. [2022-12-14 14:51:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:51:36,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2022-12-14 14:51:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:36,865 INFO L225 Difference]: With dead ends: 150 [2022-12-14 14:51:36,865 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 14:51:36,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:51:36,866 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:36,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 154 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 14:51:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2022-12-14 14:51:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 19 states have call successors, (19), 7 states have call predecessors, (19), 10 states have return successors, (31), 21 states have call predecessors, (31), 16 states have call successors, (31) [2022-12-14 14:51:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2022-12-14 14:51:36,874 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 84 [2022-12-14 14:51:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:36,875 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2022-12-14 14:51:36,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 14:51:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2022-12-14 14:51:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 14:51:36,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:36,875 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:36,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 14:51:36,876 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2017951873, now seen corresponding path program 2 times [2022-12-14 14:51:36,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:36,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662234534] [2022-12-14 14:51:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:36,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 67 proven. 28 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 14:51:36,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:36,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662234534] [2022-12-14 14:51:36,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662234534] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:51:36,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132708599] [2022-12-14 14:51:36,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:51:36,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:51:36,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:51:36,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:51:36,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:51:36,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 14:51:36,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:51:36,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 14:51:36,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:51:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-12-14 14:51:37,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:51:37,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132708599] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:51:37,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:51:37,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2022-12-14 14:51:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904712574] [2022-12-14 14:51:37,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:51:37,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:51:37,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:51:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:51:37,005 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 5 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 14:51:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:37,055 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2022-12-14 14:51:37,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:51:37,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2022-12-14 14:51:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:37,057 INFO L225 Difference]: With dead ends: 116 [2022-12-14 14:51:37,057 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 14:51:37,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:51:37,058 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 27 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:37,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 116 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 14:51:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-12-14 14:51:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 85 states have internal predecessors, (90), 19 states have call successors, (19), 7 states have call predecessors, (19), 10 states have return successors, (31), 21 states have call predecessors, (31), 16 states have call successors, (31) [2022-12-14 14:51:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2022-12-14 14:51:37,067 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 79 [2022-12-14 14:51:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:37,068 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2022-12-14 14:51:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 14:51:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2022-12-14 14:51:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 14:51:37,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:51:37,070 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 15, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:37,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:51:37,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 14:51:37,271 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2022-12-14 14:51:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:51:37,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2010674499, now seen corresponding path program 1 times [2022-12-14 14:51:37,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:51:37,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178618177] [2022-12-14 14:51:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:37,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:51:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 61 proven. 203 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-12-14 14:51:37,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:51:37,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178618177] [2022-12-14 14:51:37,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178618177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:51:37,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139510419] [2022-12-14 14:51:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:51:37,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:51:37,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:51:37,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:51:37,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:51:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:51:37,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 14:51:37,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:51:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 615 proven. 28 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-12-14 14:51:37,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:51:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 61 proven. 203 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-12-14 14:51:37,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139510419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:51:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [692114063] [2022-12-14 14:51:37,693 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 14:51:37,693 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:51:37,694 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-12-14 14:51:37,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:51:37,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-12-14 14:51:37,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118261755] [2022-12-14 14:51:37,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:51:37,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 14:51:37,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:51:37,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 14:51:37,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:51:37,696 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 14:51:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:51:37,766 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2022-12-14 14:51:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:51:37,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 178 [2022-12-14 14:51:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:51:37,767 INFO L225 Difference]: With dead ends: 173 [2022-12-14 14:51:37,767 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 14:51:37,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 350 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:51:37,768 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:51:37,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:51:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 14:51:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 14:51:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:51:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 14:51:37,769 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 178 [2022-12-14 14:51:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:51:37,769 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 14:51:37,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 14:51:37,769 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 14:51:37,769 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 14:51:37,771 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2022-12-14 14:51:37,772 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2022-12-14 14:51:37,772 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2022-12-14 14:51:37,772 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2022-12-14 14:51:37,772 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2022-12-14 14:51:37,772 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2022-12-14 14:51:37,772 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2022-12-14 14:51:37,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2022-12-14 14:51:37,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2022-12-14 14:51:37,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2022-12-14 14:51:37,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:51:37,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:51:37,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 14:51:38,381 INFO L899 garLoopResultBuilder]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,382 INFO L899 garLoopResultBuilder]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2022-12-14 14:51:38,382 INFO L899 garLoopResultBuilder]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,382 INFO L899 garLoopResultBuilder]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2022-12-14 14:51:38,382 INFO L899 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,382 INFO L899 garLoopResultBuilder]: For program point L14-1(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,382 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-12-14 14:51:38,382 INFO L895 garLoopResultBuilder]: At program point L14-2(line 14) the Hoare annotation is: (and (or (and (<= |rec1_#in~i| rec1_~i) (<= rec1_~i 2147483647)) (not (<= |rec1_#in~i| 2147483647))) (or (not (<= |rec1_#in~i| 2147483646)) (and (<= rec1_~i |rec1_#in~i|) (<= 1 rec1_~i)))) [2022-12-14 14:51:38,383 INFO L899 garLoopResultBuilder]: For program point L14-3(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,383 INFO L899 garLoopResultBuilder]: For program point L14-4(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,383 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 15) the Hoare annotation is: true [2022-12-14 14:51:38,383 INFO L899 garLoopResultBuilder]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,383 INFO L899 garLoopResultBuilder]: For program point L14-5(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,383 INFO L895 garLoopResultBuilder]: At program point L14-6(line 14) the Hoare annotation is: (or (and (<= |rec1_#in~i| rec1_~i) (<= rec1_~i |rec1_#in~i|) (<= |rec1_#t~ret0| 1) (<= 1 rec1_~i)) (not (<= |rec1_#in~i| 2147483647))) [2022-12-14 14:51:38,383 INFO L899 garLoopResultBuilder]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,383 INFO L899 garLoopResultBuilder]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,383 INFO L899 garLoopResultBuilder]: For program point L14-7(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,383 INFO L899 garLoopResultBuilder]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,384 INFO L895 garLoopResultBuilder]: At program point L14-8(line 14) the Hoare annotation is: (or (and (<= |rec1_#t~ret1| 0) (<= |rec1_#in~i| rec1_~i) (<= rec1_~i |rec1_#in~i|) (<= |rec1_#t~ret0| 1) (<= 1 rec1_~i)) (not (<= |rec1_#in~i| 2147483647))) [2022-12-14 14:51:38,384 INFO L899 garLoopResultBuilder]: For program point L14-9(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,384 INFO L899 garLoopResultBuilder]: For program point L14-10(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,384 INFO L899 garLoopResultBuilder]: For program point L14-11(line 14) no Hoare annotation was computed. [2022-12-14 14:51:38,384 INFO L899 garLoopResultBuilder]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2022-12-14 14:51:38,384 INFO L899 garLoopResultBuilder]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2022-12-14 14:51:38,384 INFO L899 garLoopResultBuilder]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2022-12-14 14:51:38,384 INFO L899 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2022-12-14 14:51:38,384 INFO L899 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2022-12-14 14:51:38,384 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 19) no Hoare annotation was computed. [2022-12-14 14:51:38,384 INFO L895 garLoopResultBuilder]: At program point L20-2(line 20) the Hoare annotation is: (or (and (<= |rec2_#in~j| rec2_~j) (<= 1 rec2_~j) (<= rec2_~j 2147483646)) (not (<= |rec2_#in~j| 2147483646))) [2022-12-14 14:51:38,385 INFO L899 garLoopResultBuilder]: For program point L20-3(line 20) no Hoare annotation was computed. [2022-12-14 14:51:38,385 INFO L895 garLoopResultBuilder]: At program point L20-4(line 20) the Hoare annotation is: (or (and (<= |rec2_#in~j| rec2_~j) (< |rec2_#t~ret3| 2147483647) (<= 1 |rec2_#t~ret3|) (<= 1 rec2_~j) (<= rec2_~j 2147483646)) (not (<= |rec2_#in~j| 2147483646))) [2022-12-14 14:51:38,385 INFO L899 garLoopResultBuilder]: For program point L20-5(line 20) no Hoare annotation was computed. [2022-12-14 14:51:38,385 INFO L899 garLoopResultBuilder]: For program point L20-6(line 20) no Hoare annotation was computed. [2022-12-14 14:51:38,385 INFO L899 garLoopResultBuilder]: For program point L20-7(line 20) no Hoare annotation was computed. [2022-12-14 14:51:38,385 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 21) the Hoare annotation is: true [2022-12-14 14:51:38,385 INFO L899 garLoopResultBuilder]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2022-12-14 14:51:38,385 INFO L899 garLoopResultBuilder]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2022-12-14 14:51:38,385 INFO L899 garLoopResultBuilder]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2022-12-14 14:51:38,385 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 14:51:38,386 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (<= |ULTIMATE.start_main_~x~0#1| 2147483646) [2022-12-14 14:51:38,386 INFO L899 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-12-14 14:51:38,386 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-12-14 14:51:38,386 INFO L902 garLoopResultBuilder]: At program point L23(lines 23 28) the Hoare annotation is: true [2022-12-14 14:51:38,386 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 14:51:38,389 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:51:38,391 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 14:51:38,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 02:51:38 BoogieIcfgContainer [2022-12-14 14:51:38,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 14:51:38,397 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 14:51:38,397 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 14:51:38,397 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 14:51:38,397 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:51:33" (3/4) ... [2022-12-14 14:51:38,400 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 14:51:38,404 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2022-12-14 14:51:38,404 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2022-12-14 14:51:38,407 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-12-14 14:51:38,407 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 14:51:38,407 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-14 14:51:38,430 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 14:51:38,430 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 14:51:38,431 INFO L158 Benchmark]: Toolchain (without parser) took 4891.32ms. Allocated memory was 127.9MB in the beginning and 159.4MB in the end (delta: 31.5MB). Free memory was 84.9MB in the beginning and 108.7MB in the end (delta: -23.8MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2022-12-14 14:51:38,431 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 127.9MB. Free memory is still 96.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:51:38,432 INFO L158 Benchmark]: CACSL2BoogieTranslator took 157.52ms. Allocated memory is still 127.9MB. Free memory was 84.6MB in the beginning and 75.6MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 14:51:38,432 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.18ms. Allocated memory is still 127.9MB. Free memory was 75.4MB in the beginning and 74.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 14:51:38,432 INFO L158 Benchmark]: Boogie Preprocessor took 12.53ms. Allocated memory is still 127.9MB. Free memory was 74.2MB in the beginning and 73.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:51:38,432 INFO L158 Benchmark]: RCFGBuilder took 233.03ms. Allocated memory is still 127.9MB. Free memory was 73.1MB in the beginning and 62.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 14:51:38,433 INFO L158 Benchmark]: TraceAbstraction took 4428.07ms. Allocated memory was 127.9MB in the beginning and 159.4MB in the end (delta: 31.5MB). Free memory was 61.6MB in the beginning and 111.8MB in the end (delta: -50.2MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. [2022-12-14 14:51:38,433 INFO L158 Benchmark]: Witness Printer took 33.33ms. Allocated memory is still 159.4MB. Free memory was 111.8MB in the beginning and 108.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 14:51:38,434 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 127.9MB. Free memory is still 96.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 157.52ms. Allocated memory is still 127.9MB. Free memory was 84.6MB in the beginning and 75.6MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.18ms. Allocated memory is still 127.9MB. Free memory was 75.4MB in the beginning and 74.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.53ms. Allocated memory is still 127.9MB. Free memory was 74.2MB in the beginning and 73.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 233.03ms. Allocated memory is still 127.9MB. Free memory was 73.1MB in the beginning and 62.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4428.07ms. Allocated memory was 127.9MB in the beginning and 159.4MB in the end (delta: 31.5MB). Free memory was 61.6MB in the beginning and 111.8MB in the end (delta: -50.2MB). Peak memory consumption was 56.7MB. Max. memory is 16.1GB. * Witness Printer took 33.33ms. Allocated memory is still 159.4MB. Free memory was 111.8MB in the beginning and 108.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 19, TraceHistogramMax: 22, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 415 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 376 mSDsluCounter, 2423 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1691 mSDsCounter, 126 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 883 IncrementalHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 126 mSolverCounterUnsat, 732 mSDtfsCounter, 883 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 686 GetRequests, 571 SyntacticMatches, 5 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=15, InterpolantAutomatonStates: 120, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 161 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 224 PreInvPairs, 241 NumberOfFragments, 106 HoareAnnotationTreeSize, 224 FomulaSimplifications, 138 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 9 FomulaSimplificationsInter, 683 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 1143 NumberOfCodeBlocks, 1082 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1338 ConstructedInterpolants, 0 QuantifiedInterpolants, 1858 SizeOfPredicates, 4 NumberOfNonLiveVariables, 575 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 25 InterpolantComputations, 17 PerfectInterpolantSequences, 3817/4287 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-12-14 14:51:38,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_523bdbe9-2ca3-4897-8de9-f666bf7dc952/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE