./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 32bit --witnessprinter.graph.data.programhash 4a3cef13903dd032b032a92c3e6d07b1ee77361a4ee844998d70fb602ded6daa --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:37:40,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:37:40,816 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 13:37:40,820 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:37:40,821 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:37:40,851 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:37:40,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:37:40,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:37:40,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:37:40,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:37:40,854 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:37:40,855 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:37:40,855 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:37:40,856 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:37:40,856 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:37:40,857 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:37:40,857 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:37:40,858 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:37:40,858 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:37:40,859 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:37:40,860 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:37:40,860 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:37:40,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:37:40,862 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:37:40,862 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:37:40,863 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:37:40,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:37:40,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:37:40,874 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:37:40,874 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:37:40,875 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:37:40,875 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 13:37:40,875 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:37:40,875 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:37:40,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:37:40,876 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:37:40,876 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:37:40,876 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:37:40,876 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:37:40,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:37:40,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:37:40,877 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:37:40,877 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:37:40,878 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:37:40,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:37:40,878 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:37:40,878 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:37:40,878 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:37:40,878 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:37:40,879 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a3cef13903dd032b032a92c3e6d07b1ee77361a4ee844998d70fb602ded6daa [2023-12-02 13:37:41,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:37:41,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:37:41,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:37:41,141 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:37:41,142 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:37:41,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2023-12-02 13:37:43,916 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:37:44,081 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:37:44,082 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2023-12-02 13:37:44,090 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/data/8ed53f593/2c8d3731b7184a07ac1ff47f3beed055/FLAGb4f0d1c81 [2023-12-02 13:37:44,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/data/8ed53f593/2c8d3731b7184a07ac1ff47f3beed055 [2023-12-02 13:37:44,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:37:44,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:37:44,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:37:44,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:37:44,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:37:44,490 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f78695c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44, skipping insertion in model container [2023-12-02 13:37:44,492 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,513 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:37:44,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:37:44,676 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:37:44,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:37:44,708 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:37:44,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44 WrapperNode [2023-12-02 13:37:44,709 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:37:44,710 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:37:44,710 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:37:44,710 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:37:44,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,739 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2023-12-02 13:37:44,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:37:44,740 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:37:44,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:37:44,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:37:44,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,749 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,749 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,752 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,754 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,756 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,756 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,758 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:37:44,758 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:37:44,759 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:37:44,759 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:37:44,759 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (1/1) ... [2023-12-02 13:37:44,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:37:44,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:44,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:37:44,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:37:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:37:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 13:37:44,812 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 13:37:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:37:44,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:37:44,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:37:44,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 13:37:44,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 13:37:44,867 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:37:44,869 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:37:45,045 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:37:45,079 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:37:45,079 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 13:37:45,081 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:37:45 BoogieIcfgContainer [2023-12-02 13:37:45,081 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:37:45,084 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:37:45,084 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:37:45,087 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:37:45,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:37:44" (1/3) ... [2023-12-02 13:37:45,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7047cf4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:37:45, skipping insertion in model container [2023-12-02 13:37:45,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:44" (2/3) ... [2023-12-02 13:37:45,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7047cf4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:37:45, skipping insertion in model container [2023-12-02 13:37:45,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:37:45" (3/3) ... [2023-12-02 13:37:45,090 INFO L112 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2023-12-02 13:37:45,105 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:37:45,105 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-12-02 13:37:45,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:37:45,148 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=LoopHeads, 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;@217f6896, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:37:45,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-12-02 13:37:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 53 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:37:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 13:37:45,157 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:45,157 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:45,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:45,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:45,162 INFO L85 PathProgramCache]: Analyzing trace with hash -129934665, now seen corresponding path program 1 times [2023-12-02 13:37:45,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:45,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257166767] [2023-12-02 13:37:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:45,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:45,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:45,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257166767] [2023-12-02 13:37:45,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 13:37:45,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437507301] [2023-12-02 13:37:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:45,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:45,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:45,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:45,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:37:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:45,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 13:37:45,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:37:45,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:45,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437507301] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:45,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:45,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:37:45,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322681489] [2023-12-02 13:37:45,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:45,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 13:37:45,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 13:37:45,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:37:45,433 INFO L87 Difference]: Start difference. First operand has 60 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 53 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:45,465 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2023-12-02 13:37:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 13:37:45,467 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-12-02 13:37:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:45,474 INFO L225 Difference]: With dead ends: 73 [2023-12-02 13:37:45,475 INFO L226 Difference]: Without dead ends: 57 [2023-12-02 13:37:45,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 13:37:45,481 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:45,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:37:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-02 13:37:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-02 13:37:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 30 states have (on average 1.8) internal successors, (54), 51 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:37:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2023-12-02 13:37:45,523 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 10 [2023-12-02 13:37:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:45,525 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2023-12-02 13:37:45,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2023-12-02 13:37:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 13:37:45,527 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:45,527 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:45,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:37:45,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 13:37:45,728 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:45,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:45,729 INFO L85 PathProgramCache]: Analyzing trace with hash -129936426, now seen corresponding path program 1 times [2023-12-02 13:37:45,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:45,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476755920] [2023-12-02 13:37:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:45,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:37:45,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476755920] [2023-12-02 13:37:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476755920] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:45,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:37:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626084981] [2023-12-02 13:37:45,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:45,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:37:45,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:45,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:37:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:37:45,843 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:45,897 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2023-12-02 13:37:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:37:45,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 10 [2023-12-02 13:37:45,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:45,900 INFO L225 Difference]: With dead ends: 71 [2023-12-02 13:37:45,900 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 13:37:45,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:37:45,902 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:45,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 152 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:37:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 13:37:45,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-02 13:37:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 55 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:37:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2023-12-02 13:37:45,912 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 10 [2023-12-02 13:37:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:45,913 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2023-12-02 13:37:45,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:45,913 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2023-12-02 13:37:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 13:37:45,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:45,914 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:45,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:37:45,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:45,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:45,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1170489416, now seen corresponding path program 1 times [2023-12-02 13:37:45,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:45,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111209419] [2023-12-02 13:37:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:45,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:45,932 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:37:45,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339850448] [2023-12-02 13:37:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:45,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:45,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:45,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:45,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:37:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:45,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:37:45,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:37:46,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:46,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:46,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111209419] [2023-12-02 13:37:46,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:37:46,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339850448] [2023-12-02 13:37:46,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339850448] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:46,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:46,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:37:46,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188547447] [2023-12-02 13:37:46,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:46,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:37:46,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:46,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:37:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:37:46,157 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 6 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:46,301 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2023-12-02 13:37:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:37:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-12-02 13:37:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:46,303 INFO L225 Difference]: With dead ends: 106 [2023-12-02 13:37:46,303 INFO L226 Difference]: Without dead ends: 100 [2023-12-02 13:37:46,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:37:46,305 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 86 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:46,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 96 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:37:46,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-02 13:37:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2023-12-02 13:37:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 77 states have internal predecessors, (95), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:37:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2023-12-02 13:37:46,318 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 13 [2023-12-02 13:37:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:46,319 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2023-12-02 13:37:46,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:46,319 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2023-12-02 13:37:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:37:46,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:46,320 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:46,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 13:37:46,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:46,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:46,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:46,530 INFO L85 PathProgramCache]: Analyzing trace with hash 441104474, now seen corresponding path program 1 times [2023-12-02 13:37:46,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:46,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360562496] [2023-12-02 13:37:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:46,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:46,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:37:46,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851291641] [2023-12-02 13:37:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:46,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:46,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:46,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:46,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:37:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:46,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:37:46,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:37:46,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:46,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:46,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360562496] [2023-12-02 13:37:46,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:37:46,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851291641] [2023-12-02 13:37:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851291641] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:46,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:46,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:37:46,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238436086] [2023-12-02 13:37:46,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:46,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:37:46,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:46,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:37:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:37:46,613 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:46,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:46,669 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2023-12-02 13:37:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:37:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-12-02 13:37:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:46,670 INFO L225 Difference]: With dead ends: 94 [2023-12-02 13:37:46,670 INFO L226 Difference]: Without dead ends: 88 [2023-12-02 13:37:46,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:37:46,672 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:46,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 47 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:37:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-02 13:37:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2023-12-02 13:37:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.564516129032258) internal successors, (97), 79 states have internal predecessors, (97), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:37:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2023-12-02 13:37:46,681 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 15 [2023-12-02 13:37:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:46,681 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2023-12-02 13:37:46,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2023-12-02 13:37:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 13:37:46,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:46,682 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:46,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:37:46,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:46,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:46,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:46,890 INFO L85 PathProgramCache]: Analyzing trace with hash 789336863, now seen corresponding path program 1 times [2023-12-02 13:37:46,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:46,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59810402] [2023-12-02 13:37:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:46,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:46,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:37:46,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628208679] [2023-12-02 13:37:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:46,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:46,903 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:46,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:37:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:46,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:37:46,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:37:46,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:46,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:46,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59810402] [2023-12-02 13:37:46,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:37:46,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628208679] [2023-12-02 13:37:46,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628208679] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:46,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:46,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:37:46,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385458353] [2023-12-02 13:37:46,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:46,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:37:46,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:37:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:37:46,987 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:47,076 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2023-12-02 13:37:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:37:47,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-12-02 13:37:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:47,079 INFO L225 Difference]: With dead ends: 135 [2023-12-02 13:37:47,079 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 13:37:47,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:37:47,080 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:47,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 74 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:37:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 13:37:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2023-12-02 13:37:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.4883720930232558) internal successors, (128), 103 states have internal predecessors, (128), 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) [2023-12-02 13:37:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2023-12-02 13:37:47,093 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 16 [2023-12-02 13:37:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:47,094 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2023-12-02 13:37:47,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2023-12-02 13:37:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:37:47,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:47,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:47,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:37:47,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:47,295 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:47,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:47,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1300360964, now seen corresponding path program 1 times [2023-12-02 13:37:47,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:47,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999979799] [2023-12-02 13:37:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:47,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:47,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:37:47,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769489862] [2023-12-02 13:37:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:47,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:47,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:47,311 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:47,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:37:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:47,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:37:47,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:37:47,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:37:47,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:47,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999979799] [2023-12-02 13:37:47,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:37:47,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769489862] [2023-12-02 13:37:47,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769489862] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:37:47,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62735037] [2023-12-02 13:37:47,864 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 13:37:47,864 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:37:47,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:37:47,873 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:37:47,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:37:48,283 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:37:48,339 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:37:49,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [62735037] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:49,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:37:49,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5] total 16 [2023-12-02 13:37:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55631574] [2023-12-02 13:37:49,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:49,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:37:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:37:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:37:49,199 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 11 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:49,505 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2023-12-02 13:37:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:37:49,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-12-02 13:37:49,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:49,506 INFO L225 Difference]: With dead ends: 116 [2023-12-02 13:37:49,507 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 13:37:49,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:37:49,508 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:49,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:37:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 13:37:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2023-12-02 13:37:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 103 states have internal predecessors, (126), 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) [2023-12-02 13:37:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2023-12-02 13:37:49,522 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 17 [2023-12-02 13:37:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:49,523 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2023-12-02 13:37:49,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2023-12-02 13:37:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 13:37:49,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:49,524 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 13:37:49,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:37:49,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:49,730 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:49,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:49,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1921517682, now seen corresponding path program 1 times [2023-12-02 13:37:49,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:49,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060586982] [2023-12-02 13:37:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:49,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:49,739 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:37:49,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127900526] [2023-12-02 13:37:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:49,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:49,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:49,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:49,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:37:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:49,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:37:49,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:37:49,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:37:49,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:49,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060586982] [2023-12-02 13:37:49,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:37:49,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127900526] [2023-12-02 13:37:49,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127900526] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:37:49,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148577614] [2023-12-02 13:37:49,901 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 13:37:49,902 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:37:49,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:37:49,902 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:37:49,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:37:50,360 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-12-02 13:37:50,369 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:37:50,411 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:37:51,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [148577614] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:51,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:37:51,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [4, 4] total 20 [2023-12-02 13:37:51,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403920307] [2023-12-02 13:37:51,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:51,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 13:37:51,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:51,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 13:37:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:37:51,715 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:37:52,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:52,145 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2023-12-02 13:37:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:37:52,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-12-02 13:37:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:52,147 INFO L225 Difference]: With dead ends: 120 [2023-12-02 13:37:52,147 INFO L226 Difference]: Without dead ends: 118 [2023-12-02 13:37:52,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:37:52,148 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:52,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 154 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:37:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-02 13:37:52,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-12-02 13:37:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 89 states have (on average 1.449438202247191) internal successors, (129), 106 states have internal predecessors, (129), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 13:37:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2023-12-02 13:37:52,161 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 28 [2023-12-02 13:37:52,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:52,162 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2023-12-02 13:37:52,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:37:52,162 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2023-12-02 13:37:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 13:37:52,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:52,163 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 13:37:52,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:37:52,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:52,365 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:52,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:52,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1921825522, now seen corresponding path program 1 times [2023-12-02 13:37:52,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:52,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130570130] [2023-12-02 13:37:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:52,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:52,382 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:37:52,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854262144] [2023-12-02 13:37:52,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:52,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:52,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:52,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:52,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:37:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:52,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:37:52,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:37:52,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:37:52,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:52,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130570130] [2023-12-02 13:37:52,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:37:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854262144] [2023-12-02 13:37:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854262144] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:37:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305393667] [2023-12-02 13:37:52,559 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 13:37:52,559 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:37:52,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:37:52,560 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:37:52,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:37:52,964 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2023-12-02 13:37:52,972 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:37:53,007 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:37:54,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [305393667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:54,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:37:54,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [4, 4] total 20 [2023-12-02 13:37:54,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356950359] [2023-12-02 13:37:54,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:54,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 13:37:54,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:54,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 13:37:54,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:37:54,039 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:37:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:54,415 INFO L93 Difference]: Finished difference Result 122 states and 147 transitions. [2023-12-02 13:37:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:37:54,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-12-02 13:37:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:54,416 INFO L225 Difference]: With dead ends: 122 [2023-12-02 13:37:54,416 INFO L226 Difference]: Without dead ends: 120 [2023-12-02 13:37:54,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:37:54,417 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:54,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 141 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:37:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-02 13:37:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-12-02 13:37:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 110 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 13:37:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 145 transitions. [2023-12-02 13:37:54,430 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 145 transitions. Word has length 28 [2023-12-02 13:37:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:54,430 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 145 transitions. [2023-12-02 13:37:54,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:37:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 145 transitions. [2023-12-02 13:37:54,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 13:37:54,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:54,432 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-12-02 13:37:54,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:37:54,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:54,632 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:54,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:54,633 INFO L85 PathProgramCache]: Analyzing trace with hash -609053680, now seen corresponding path program 1 times [2023-12-02 13:37:54,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:54,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601459535] [2023-12-02 13:37:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:54,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:54,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:37:54,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009621655] [2023-12-02 13:37:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:54,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:54,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:54,643 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:54,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:37:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:54,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:37:54,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:37:54,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:54,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:54,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601459535] [2023-12-02 13:37:54,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:37:54,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009621655] [2023-12-02 13:37:54,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009621655] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:54,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:54,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:37:54,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326354508] [2023-12-02 13:37:54,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:54,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:37:54,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:37:54,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:37:54,739 INFO L87 Difference]: Start difference. First operand 120 states and 145 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:37:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:54,794 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2023-12-02 13:37:54,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:37:54,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-12-02 13:37:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:54,796 INFO L225 Difference]: With dead ends: 120 [2023-12-02 13:37:54,796 INFO L226 Difference]: Without dead ends: 119 [2023-12-02 13:37:54,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:37:54,797 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 62 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:54,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 139 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:37:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-02 13:37:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-12-02 13:37:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 109 states have internal predecessors, (130), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 13:37:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2023-12-02 13:37:54,807 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 31 [2023-12-02 13:37:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:54,807 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2023-12-02 13:37:54,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:37:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2023-12-02 13:37:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 13:37:54,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:54,809 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-12-02 13:37:54,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:37:55,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:55,011 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:55,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:55,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1700794852, now seen corresponding path program 1 times [2023-12-02 13:37:55,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:55,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776036602] [2023-12-02 13:37:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:55,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:55,019 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:37:55,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562070431] [2023-12-02 13:37:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:55,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:55,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:55,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:55,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:37:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:55,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:37:55,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:37:55,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:37:55,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:55,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776036602] [2023-12-02 13:37:55,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:37:55,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562070431] [2023-12-02 13:37:55,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562070431] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:37:55,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1296812278] [2023-12-02 13:37:55,186 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:37:55,187 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:37:55,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:37:55,187 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:37:55,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:37:56,548 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:37:56,556 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:37:56,580 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:37:58,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3029#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 ~counter~0) (<= 2147483647 |ULTIMATE.start_main_#t~post6#1|) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:37:58,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:37:58,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:37:58,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-12-02 13:37:58,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635654970] [2023-12-02 13:37:58,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:37:58,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:37:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:58,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:37:58,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2023-12-02 13:37:58,339 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 13:37:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:58,489 INFO L93 Difference]: Finished difference Result 289 states and 345 transitions. [2023-12-02 13:37:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:37:58,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-12-02 13:37:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:58,492 INFO L225 Difference]: With dead ends: 289 [2023-12-02 13:37:58,492 INFO L226 Difference]: Without dead ends: 279 [2023-12-02 13:37:58,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:37:58,494 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 96 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:58,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 342 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:37:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-12-02 13:37:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 237. [2023-12-02 13:37:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 204 states have (on average 1.4313725490196079) internal successors, (292), 220 states have internal predecessors, (292), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 13:37:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 314 transitions. [2023-12-02 13:37:58,507 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 314 transitions. Word has length 32 [2023-12-02 13:37:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:58,507 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 314 transitions. [2023-12-02 13:37:58,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 13:37:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 314 transitions. [2023-12-02 13:37:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 13:37:58,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:58,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2023-12-02 13:37:58,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 13:37:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 13:37:58,709 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:37:58,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash -336096120, now seen corresponding path program 1 times [2023-12-02 13:37:58,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:37:58,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033749251] [2023-12-02 13:37:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:58,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:37:58,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:37:58,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080323679] [2023-12-02 13:37:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:58,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:58,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:58,718 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:58,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:37:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:58,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:37:58,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:37:58,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:58,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:37:58,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033749251] [2023-12-02 13:37:58,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:37:58,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080323679] [2023-12-02 13:37:58,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080323679] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:58,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314583904] [2023-12-02 13:37:58,977 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:37:58,977 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:37:58,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:37:58,977 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:37:58,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:37:59,870 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 13:37:59,880 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:37:59,903 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:01,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3796#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 4294967294) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)) 0) (<= ~counter~0 20) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y1~0#1| 2147483646)))' at error location [2023-12-02 13:38:01,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:01,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:38:01,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 13:38:01,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993850842] [2023-12-02 13:38:01,765 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:01,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:38:01,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:01,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:38:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2023-12-02 13:38:01,766 INFO L87 Difference]: Start difference. First operand 237 states and 314 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:38:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:01,868 INFO L93 Difference]: Finished difference Result 248 states and 316 transitions. [2023-12-02 13:38:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:38:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-12-02 13:38:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:01,871 INFO L225 Difference]: With dead ends: 248 [2023-12-02 13:38:01,871 INFO L226 Difference]: Without dead ends: 245 [2023-12-02 13:38:01,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2023-12-02 13:38:01,872 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 96 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:01,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 60 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-12-02 13:38:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 234. [2023-12-02 13:38:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 204 states have (on average 1.3970588235294117) internal successors, (285), 217 states have internal predecessors, (285), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 13:38:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 307 transitions. [2023-12-02 13:38:01,883 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 307 transitions. Word has length 34 [2023-12-02 13:38:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:01,883 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 307 transitions. [2023-12-02 13:38:01,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:38:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 307 transitions. [2023-12-02 13:38:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 13:38:01,884 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:01,884 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-12-02 13:38:01,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 13:38:02,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:02,085 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:02,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:02,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1829045075, now seen corresponding path program 1 times [2023-12-02 13:38:02,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:02,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408107737] [2023-12-02 13:38:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:02,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:02,093 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:02,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396782215] [2023-12-02 13:38:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:02,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:02,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:02,094 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:02,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 13:38:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:02,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:38:02,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:38:02,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:02,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408107737] [2023-12-02 13:38:02,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396782215] [2023-12-02 13:38:02,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396782215] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227131301] [2023-12-02 13:38:02,473 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:38:02,473 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:02,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:02,474 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:02,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:03,345 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 13:38:03,353 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:03,374 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:05,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4515#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:38:05,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:05,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:38:05,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 13:38:05,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418351157] [2023-12-02 13:38:05,920 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:05,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:38:05,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:05,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:38:05,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2023-12-02 13:38:05,922 INFO L87 Difference]: Start difference. First operand 234 states and 307 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:38:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:06,063 INFO L93 Difference]: Finished difference Result 336 states and 423 transitions. [2023-12-02 13:38:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:38:06,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-12-02 13:38:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:06,065 INFO L225 Difference]: With dead ends: 336 [2023-12-02 13:38:06,065 INFO L226 Difference]: Without dead ends: 331 [2023-12-02 13:38:06,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2023-12-02 13:38:06,066 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:06,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 134 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-12-02 13:38:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 305. [2023-12-02 13:38:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 272 states have (on average 1.3823529411764706) internal successors, (376), 285 states have internal predecessors, (376), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 13:38:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 404 transitions. [2023-12-02 13:38:06,088 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 404 transitions. Word has length 35 [2023-12-02 13:38:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:06,088 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 404 transitions. [2023-12-02 13:38:06,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:38:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 404 transitions. [2023-12-02 13:38:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 13:38:06,089 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:06,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2023-12-02 13:38:06,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 13:38:06,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:06,290 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:06,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:06,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2068381735, now seen corresponding path program 1 times [2023-12-02 13:38:06,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:06,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256615579] [2023-12-02 13:38:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:06,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:06,299 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:06,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711178975] [2023-12-02 13:38:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:06,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:06,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:06,301 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:06,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 13:38:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:06,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:38:06,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:06,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:06,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:06,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256615579] [2023-12-02 13:38:06,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:06,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711178975] [2023-12-02 13:38:06,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711178975] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:06,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1214288017] [2023-12-02 13:38:06,514 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:38:06,514 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:06,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:06,515 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:06,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:07,383 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:38:07,389 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:07,409 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:09,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5476#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 2147483648 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:38:09,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:09,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:38:09,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2023-12-02 13:38:09,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164539547] [2023-12-02 13:38:09,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:09,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:38:09,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:09,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:38:09,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2023-12-02 13:38:09,272 INFO L87 Difference]: Start difference. First operand 305 states and 404 transitions. Second operand has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:38:09,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:09,622 INFO L93 Difference]: Finished difference Result 314 states and 411 transitions. [2023-12-02 13:38:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:38:09,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2023-12-02 13:38:09,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:09,625 INFO L225 Difference]: With dead ends: 314 [2023-12-02 13:38:09,625 INFO L226 Difference]: Without dead ends: 308 [2023-12-02 13:38:09,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 13:38:09,627 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 150 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:09,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 85 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:38:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-12-02 13:38:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 305. [2023-12-02 13:38:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 272 states have (on average 1.3602941176470589) internal successors, (370), 285 states have internal predecessors, (370), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 13:38:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 398 transitions. [2023-12-02 13:38:09,646 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 398 transitions. Word has length 37 [2023-12-02 13:38:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:09,646 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 398 transitions. [2023-12-02 13:38:09,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:38:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 398 transitions. [2023-12-02 13:38:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 13:38:09,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:09,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2023-12-02 13:38:09,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 13:38:09,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 13:38:09,848 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:09,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:09,848 INFO L85 PathProgramCache]: Analyzing trace with hash 304675714, now seen corresponding path program 1 times [2023-12-02 13:38:09,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:09,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899809941] [2023-12-02 13:38:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:09,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:09,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:09,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793932046] [2023-12-02 13:38:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:09,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:09,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:09,857 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:09,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 13:38:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:09,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:38:09,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:38:09,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:09,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:09,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899809941] [2023-12-02 13:38:09,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:09,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793932046] [2023-12-02 13:38:09,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793932046] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:09,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:09,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:38:09,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891064793] [2023-12-02 13:38:09,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:09,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:38:09,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:38:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:38:09,943 INFO L87 Difference]: Start difference. First operand 305 states and 398 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:38:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:10,047 INFO L93 Difference]: Finished difference Result 311 states and 400 transitions. [2023-12-02 13:38:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:38:10,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-12-02 13:38:10,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:10,050 INFO L225 Difference]: With dead ends: 311 [2023-12-02 13:38:10,050 INFO L226 Difference]: Without dead ends: 310 [2023-12-02 13:38:10,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:38:10,051 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:10,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 46 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-12-02 13:38:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 305. [2023-12-02 13:38:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 272 states have (on average 1.338235294117647) internal successors, (364), 285 states have internal predecessors, (364), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 13:38:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 392 transitions. [2023-12-02 13:38:10,067 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 392 transitions. Word has length 38 [2023-12-02 13:38:10,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:10,067 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 392 transitions. [2023-12-02 13:38:10,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:38:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 392 transitions. [2023-12-02 13:38:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 13:38:10,068 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:10,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2023-12-02 13:38:10,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 13:38:10,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:10,268 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:10,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1168309708, now seen corresponding path program 1 times [2023-12-02 13:38:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:10,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602353479] [2023-12-02 13:38:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:10,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:10,275 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:10,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125679482] [2023-12-02 13:38:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:10,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:10,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:10,276 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:10,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 13:38:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:10,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 13:38:10,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:10,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:10,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:10,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602353479] [2023-12-02 13:38:10,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:10,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125679482] [2023-12-02 13:38:10,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125679482] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:10,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360718168] [2023-12-02 13:38:10,577 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:38:10,577 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:10,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:10,577 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:10,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:11,412 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 13:38:11,419 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:11,439 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:13,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7237#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y3~0#1|) 0) (<= 1 ~counter~0) (<= (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:38:13,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:13,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:38:13,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-12-02 13:38:13,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864808149] [2023-12-02 13:38:13,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:13,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:38:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:38:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 13:38:13,526 INFO L87 Difference]: Start difference. First operand 305 states and 392 transitions. Second operand has 12 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:38:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:13,712 INFO L93 Difference]: Finished difference Result 307 states and 393 transitions. [2023-12-02 13:38:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:38:13,713 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2023-12-02 13:38:13,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:13,714 INFO L225 Difference]: With dead ends: 307 [2023-12-02 13:38:13,714 INFO L226 Difference]: Without dead ends: 304 [2023-12-02 13:38:13,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 13:38:13,716 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 134 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:13,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 63 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-12-02 13:38:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 302. [2023-12-02 13:38:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 272 states have (on average 1.2683823529411764) internal successors, (345), 282 states have internal predecessors, (345), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 13:38:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 373 transitions. [2023-12-02 13:38:13,732 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 373 transitions. Word has length 38 [2023-12-02 13:38:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:13,732 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 373 transitions. [2023-12-02 13:38:13,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:38:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 373 transitions. [2023-12-02 13:38:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 13:38:13,733 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:13,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2023-12-02 13:38:13,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 13:38:13,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 13:38:13,933 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:13,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash 855012603, now seen corresponding path program 1 times [2023-12-02 13:38:13,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:13,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697393495] [2023-12-02 13:38:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:13,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:13,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:13,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30973413] [2023-12-02 13:38:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:13,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:13,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:13,944 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:13,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 13:38:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:13,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:38:13,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:38:14,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:14,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:14,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697393495] [2023-12-02 13:38:14,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:14,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30973413] [2023-12-02 13:38:14,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30973413] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:14,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:14,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:38:14,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838069724] [2023-12-02 13:38:14,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:14,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:38:14,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:14,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:38:14,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:38:14,027 INFO L87 Difference]: Start difference. First operand 302 states and 373 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:38:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:14,137 INFO L93 Difference]: Finished difference Result 308 states and 375 transitions. [2023-12-02 13:38:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:38:14,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-12-02 13:38:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:14,139 INFO L225 Difference]: With dead ends: 308 [2023-12-02 13:38:14,140 INFO L226 Difference]: Without dead ends: 307 [2023-12-02 13:38:14,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:38:14,140 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:14,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-12-02 13:38:14,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 302. [2023-12-02 13:38:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 272 states have (on average 1.2463235294117647) internal successors, (339), 282 states have internal predecessors, (339), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 13:38:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 367 transitions. [2023-12-02 13:38:14,155 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 367 transitions. Word has length 39 [2023-12-02 13:38:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:14,156 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 367 transitions. [2023-12-02 13:38:14,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:38:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 367 transitions. [2023-12-02 13:38:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 13:38:14,156 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:14,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2023-12-02 13:38:14,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 13:38:14,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 13:38:14,357 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:14,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:14,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1857862641, now seen corresponding path program 1 times [2023-12-02 13:38:14,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:14,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783593026] [2023-12-02 13:38:14,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:14,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:14,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:14,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691869687] [2023-12-02 13:38:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:14,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:14,366 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:14,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 13:38:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:14,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 13:38:14,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:38:14,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:38:14,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:14,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783593026] [2023-12-02 13:38:14,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:14,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691869687] [2023-12-02 13:38:14,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691869687] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:14,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [774740013] [2023-12-02 13:38:14,658 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:38:14,658 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:14,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:14,658 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:14,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:15,589 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 13:38:15,596 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:15,617 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:17,531 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8986#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y3~0#1|)) (<= 1 ~counter~0) (<= (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483647) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:38:17,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:17,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:38:17,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-02 13:38:17,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541184430] [2023-12-02 13:38:17,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:17,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:38:17,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:38:17,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2023-12-02 13:38:17,533 INFO L87 Difference]: Start difference. First operand 302 states and 367 transitions. Second operand has 11 states, 10 states have (on average 6.1) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:38:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:17,898 INFO L93 Difference]: Finished difference Result 336 states and 404 transitions. [2023-12-02 13:38:17,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:38:17,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2023-12-02 13:38:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:17,900 INFO L225 Difference]: With dead ends: 336 [2023-12-02 13:38:17,900 INFO L226 Difference]: Without dead ends: 335 [2023-12-02 13:38:17,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=250, Invalid=1390, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:38:17,902 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 153 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:17,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 91 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:38:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2023-12-02 13:38:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 301. [2023-12-02 13:38:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 272 states have (on average 1.2279411764705883) internal successors, (334), 281 states have internal predecessors, (334), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 13:38:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 362 transitions. [2023-12-02 13:38:17,918 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 362 transitions. Word has length 39 [2023-12-02 13:38:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:17,918 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 362 transitions. [2023-12-02 13:38:17,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.1) internal successors, (61), 11 states have internal predecessors, (61), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:38:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 362 transitions. [2023-12-02 13:38:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 13:38:17,919 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:17,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:17,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 13:38:18,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 13:38:18,120 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:18,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1074879932, now seen corresponding path program 1 times [2023-12-02 13:38:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:18,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197082021] [2023-12-02 13:38:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:18,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:18,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:18,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815555062] [2023-12-02 13:38:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:18,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:18,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:18,128 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:18,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 13:38:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:18,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:38:18,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:38:18,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:38:18,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:18,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197082021] [2023-12-02 13:38:18,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:18,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815555062] [2023-12-02 13:38:18,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815555062] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:18,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424730288] [2023-12-02 13:38:18,252 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:38:18,252 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:18,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:18,252 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:18,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:19,105 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:38:19,110 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:19,130 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:20,794 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10007#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:38:20,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:20,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:38:20,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 13:38:20,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480517320] [2023-12-02 13:38:20,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:20,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:38:20,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:20,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:38:20,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2023-12-02 13:38:20,796 INFO L87 Difference]: Start difference. First operand 301 states and 362 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 13:38:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:20,894 INFO L93 Difference]: Finished difference Result 490 states and 587 transitions. [2023-12-02 13:38:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:38:20,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2023-12-02 13:38:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:20,897 INFO L225 Difference]: With dead ends: 490 [2023-12-02 13:38:20,897 INFO L226 Difference]: Without dead ends: 488 [2023-12-02 13:38:20,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2023-12-02 13:38:20,898 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 84 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:20,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 120 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:20,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-12-02 13:38:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 424. [2023-12-02 13:38:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 389 states have (on average 1.231362467866324) internal successors, (479), 397 states have internal predecessors, (479), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 13:38:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 521 transitions. [2023-12-02 13:38:20,935 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 521 transitions. Word has length 45 [2023-12-02 13:38:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:20,936 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 521 transitions. [2023-12-02 13:38:20,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 13:38:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 521 transitions. [2023-12-02 13:38:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 13:38:20,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:20,937 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-12-02 13:38:20,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 13:38:21,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 13:38:21,141 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:21,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash -289911788, now seen corresponding path program 1 times [2023-12-02 13:38:21,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:21,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103129082] [2023-12-02 13:38:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:21,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:21,149 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:21,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633371405] [2023-12-02 13:38:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:21,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:21,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:21,151 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:21,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 13:38:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:21,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:38:21,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:38:21,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:21,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:21,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103129082] [2023-12-02 13:38:21,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:21,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633371405] [2023-12-02 13:38:21,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633371405] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:21,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:21,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:38:21,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653537086] [2023-12-02 13:38:21,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:21,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:38:21,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:21,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:38:21,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:38:21,230 INFO L87 Difference]: Start difference. First operand 424 states and 521 transitions. Second operand has 3 states, 2 states have (on average 20.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:38:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:21,275 INFO L93 Difference]: Finished difference Result 424 states and 521 transitions. [2023-12-02 13:38:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:38:21,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2023-12-02 13:38:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:21,278 INFO L225 Difference]: With dead ends: 424 [2023-12-02 13:38:21,278 INFO L226 Difference]: Without dead ends: 422 [2023-12-02 13:38:21,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:38:21,279 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 16 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:21,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 82 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:38:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-12-02 13:38:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2023-12-02 13:38:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 389 states have (on average 1.1773778920308484) internal successors, (458), 395 states have internal predecessors, (458), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 13:38:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 500 transitions. [2023-12-02 13:38:21,321 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 500 transitions. Word has length 50 [2023-12-02 13:38:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:21,321 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 500 transitions. [2023-12-02 13:38:21,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:38:21,321 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 500 transitions. [2023-12-02 13:38:21,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 13:38:21,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:21,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2023-12-02 13:38:21,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-02 13:38:21,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:21,523 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:21,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:21,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1370248155, now seen corresponding path program 1 times [2023-12-02 13:38:21,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:21,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625463552] [2023-12-02 13:38:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:21,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:21,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:21,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405128018] [2023-12-02 13:38:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:21,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:21,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:21,531 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:21,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 13:38:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:21,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:38:21,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:38:21,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:38:21,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:21,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625463552] [2023-12-02 13:38:21,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:21,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405128018] [2023-12-02 13:38:21,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405128018] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:21,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [919722430] [2023-12-02 13:38:21,705 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-12-02 13:38:21,706 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:21,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:21,706 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:21,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:22,536 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 13:38:22,543 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:22,565 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:25,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12482#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:38:25,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:25,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:38:25,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-02 13:38:25,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029399757] [2023-12-02 13:38:25,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:25,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 13:38:25,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 13:38:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 13:38:25,337 INFO L87 Difference]: Start difference. First operand 422 states and 500 transitions. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 13:38:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:25,590 INFO L93 Difference]: Finished difference Result 750 states and 897 transitions. [2023-12-02 13:38:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 13:38:25,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 56 [2023-12-02 13:38:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:25,594 INFO L225 Difference]: With dead ends: 750 [2023-12-02 13:38:25,594 INFO L226 Difference]: Without dead ends: 739 [2023-12-02 13:38:25,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=334, Invalid=1922, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 13:38:25,596 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 102 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:25,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 278 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2023-12-02 13:38:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 722. [2023-12-02 13:38:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 674 states have (on average 1.1468842729970326) internal successors, (773), 680 states have internal predecessors, (773), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 13:38:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 841 transitions. [2023-12-02 13:38:25,657 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 841 transitions. Word has length 56 [2023-12-02 13:38:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:25,657 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 841 transitions. [2023-12-02 13:38:25,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 13:38:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 841 transitions. [2023-12-02 13:38:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 13:38:25,658 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:25,659 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:25,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 13:38:25,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:25,861 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:25,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:25,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1370248573, now seen corresponding path program 2 times [2023-12-02 13:38:25,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:25,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913088348] [2023-12-02 13:38:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:25,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:25,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:25,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705836927] [2023-12-02 13:38:25,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:38:25,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:25,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:25,871 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:25,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 13:38:25,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:38:25,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:38:25,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:38:25,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:38:26,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:26,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:26,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913088348] [2023-12-02 13:38:26,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:26,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705836927] [2023-12-02 13:38:26,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705836927] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:26,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648363840] [2023-12-02 13:38:26,183 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:38:26,183 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:26,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:26,183 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:26,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:27,053 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 13:38:27,061 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:27,080 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:29,724 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14384#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:38:29,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:29,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:38:29,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 13:38:29,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570368371] [2023-12-02 13:38:29,724 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:29,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:38:29,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:38:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-12-02 13:38:29,726 INFO L87 Difference]: Start difference. First operand 722 states and 841 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:38:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:29,952 INFO L93 Difference]: Finished difference Result 1143 states and 1344 transitions. [2023-12-02 13:38:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:38:29,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2023-12-02 13:38:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:29,958 INFO L225 Difference]: With dead ends: 1143 [2023-12-02 13:38:29,958 INFO L226 Difference]: Without dead ends: 853 [2023-12-02 13:38:29,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 13:38:29,961 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 65 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:29,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 159 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2023-12-02 13:38:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 673. [2023-12-02 13:38:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 627 states have (on average 1.1371610845295055) internal successors, (713), 633 states have internal predecessors, (713), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 13:38:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 777 transitions. [2023-12-02 13:38:30,003 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 777 transitions. Word has length 56 [2023-12-02 13:38:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:30,003 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 777 transitions. [2023-12-02 13:38:30,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:38:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 777 transitions. [2023-12-02 13:38:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 13:38:30,004 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:30,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:30,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-02 13:38:30,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 13:38:30,205 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:30,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:30,205 INFO L85 PathProgramCache]: Analyzing trace with hash -740725921, now seen corresponding path program 2 times [2023-12-02 13:38:30,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:30,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815620587] [2023-12-02 13:38:30,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:30,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:30,217 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:30,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744815896] [2023-12-02 13:38:30,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:38:30,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:30,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:30,219 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:30,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 13:38:30,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:38:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:38:30,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 13:38:30,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 13:38:30,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:30,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:30,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815620587] [2023-12-02 13:38:30,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:30,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744815896] [2023-12-02 13:38:30,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744815896] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:30,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:30,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:38:30,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92513532] [2023-12-02 13:38:30,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:30,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:38:30,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:30,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:38:30,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:38:30,593 INFO L87 Difference]: Start difference. First operand 673 states and 777 transitions. Second operand has 8 states, 5 states have (on average 7.4) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:38:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:30,706 INFO L93 Difference]: Finished difference Result 681 states and 781 transitions. [2023-12-02 13:38:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:38:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 7.4) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2023-12-02 13:38:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:30,710 INFO L225 Difference]: With dead ends: 681 [2023-12-02 13:38:30,710 INFO L226 Difference]: Without dead ends: 675 [2023-12-02 13:38:30,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:38:30,711 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:30,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 70 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2023-12-02 13:38:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 672. [2023-12-02 13:38:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 626 states have (on average 1.1293929712460065) internal successors, (707), 632 states have internal predecessors, (707), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 13:38:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 771 transitions. [2023-12-02 13:38:30,745 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 771 transitions. Word has length 58 [2023-12-02 13:38:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:30,745 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 771 transitions. [2023-12-02 13:38:30,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 7.4) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 13:38:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 771 transitions. [2023-12-02 13:38:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 13:38:30,747 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:30,747 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:30,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 13:38:30,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:30,947 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:30,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:30,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1603690835, now seen corresponding path program 3 times [2023-12-02 13:38:30,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:30,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934583581] [2023-12-02 13:38:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:30,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:30,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:30,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057943892] [2023-12-02 13:38:30,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:38:30,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:30,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:30,955 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:30,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 13:38:31,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:38:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:38:31,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:38:31,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:38:31,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:31,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:31,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934583581] [2023-12-02 13:38:31,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:31,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057943892] [2023-12-02 13:38:31,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057943892] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:31,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443808822] [2023-12-02 13:38:31,452 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:38:31,452 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:31,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:31,452 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:31,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:32,245 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 13:38:32,252 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:32,272 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:35,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18400#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= 0 (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|)) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:38:35,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:35,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:38:35,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 13:38:35,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783888056] [2023-12-02 13:38:35,102 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:35,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:38:35,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:35,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:38:35,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2023-12-02 13:38:35,103 INFO L87 Difference]: Start difference. First operand 672 states and 771 transitions. Second operand has 5 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:38:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:35,216 INFO L93 Difference]: Finished difference Result 1044 states and 1206 transitions. [2023-12-02 13:38:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:38:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 77 [2023-12-02 13:38:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:35,219 INFO L225 Difference]: With dead ends: 1044 [2023-12-02 13:38:35,219 INFO L226 Difference]: Without dead ends: 705 [2023-12-02 13:38:35,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2023-12-02 13:38:35,221 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:35,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 95 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2023-12-02 13:38:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 692. [2023-12-02 13:38:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 645 states have (on average 1.1131782945736435) internal successors, (718), 651 states have internal predecessors, (718), 33 states have call successors, (33), 7 states have call predecessors, (33), 7 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-02 13:38:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 784 transitions. [2023-12-02 13:38:35,257 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 784 transitions. Word has length 77 [2023-12-02 13:38:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:35,257 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 784 transitions. [2023-12-02 13:38:35,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.75) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:38:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 784 transitions. [2023-12-02 13:38:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 13:38:35,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:35,258 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:35,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 13:38:35,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:35,459 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:35,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2053928733, now seen corresponding path program 1 times [2023-12-02 13:38:35,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:35,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219077185] [2023-12-02 13:38:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:35,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:35,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:35,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314048089] [2023-12-02 13:38:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:35,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:35,470 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:35,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 13:38:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:35,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:38:35,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:38:35,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 13:38:35,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:35,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219077185] [2023-12-02 13:38:35,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:35,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314048089] [2023-12-02 13:38:35,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314048089] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:35,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100903902] [2023-12-02 13:38:35,789 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:38:35,789 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:35,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:35,789 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:35,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:36,680 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:38:36,688 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:36,708 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:38,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20841#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 13:38:38,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:38,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:38:38,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-02 13:38:38,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379806435] [2023-12-02 13:38:38,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:38,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:38:38,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:38,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:38:38,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:38:38,963 INFO L87 Difference]: Start difference. First operand 692 states and 784 transitions. Second operand has 13 states, 11 states have (on average 11.818181818181818) internal successors, (130), 13 states have internal predecessors, (130), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 13:38:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:39,485 INFO L93 Difference]: Finished difference Result 923 states and 1049 transitions. [2023-12-02 13:38:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 13:38:39,486 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.818181818181818) internal successors, (130), 13 states have internal predecessors, (130), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2023-12-02 13:38:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:39,489 INFO L225 Difference]: With dead ends: 923 [2023-12-02 13:38:39,489 INFO L226 Difference]: Without dead ends: 917 [2023-12-02 13:38:39,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 192 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 13:38:39,491 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 194 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:39,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 107 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:38:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2023-12-02 13:38:39,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 831. [2023-12-02 13:38:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 778 states have (on average 1.1143958868894601) internal successors, (867), 784 states have internal predecessors, (867), 39 states have call successors, (39), 7 states have call predecessors, (39), 7 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-12-02 13:38:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 945 transitions. [2023-12-02 13:38:39,535 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 945 transitions. Word has length 79 [2023-12-02 13:38:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:39,535 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 945 transitions. [2023-12-02 13:38:39,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.818181818181818) internal successors, (130), 13 states have internal predecessors, (130), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 13:38:39,535 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 945 transitions. [2023-12-02 13:38:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 13:38:39,536 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:39,536 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:39,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 13:38:39,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 13:38:39,737 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:39,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash -528879022, now seen corresponding path program 1 times [2023-12-02 13:38:39,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:39,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170111611] [2023-12-02 13:38:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:39,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:39,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:39,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095742836] [2023-12-02 13:38:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:39,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:39,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:39,745 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:39,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 13:38:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:39,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:38:39,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 13:38:39,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 13:38:39,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:39,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170111611] [2023-12-02 13:38:39,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:39,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095742836] [2023-12-02 13:38:39,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095742836] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:39,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1349117487] [2023-12-02 13:38:39,979 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:38:39,979 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:39,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:39,979 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:39,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:40,802 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 13:38:40,810 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:40,830 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:42,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23382#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= |ULTIMATE.start_main_~y3~0#1| 0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (= 2147483647 |ULTIMATE.start_main_~y1~0#1|) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|))' at error location [2023-12-02 13:38:42,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:42,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:38:42,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-12-02 13:38:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047146267] [2023-12-02 13:38:42,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:42,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:38:42,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:38:42,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-12-02 13:38:42,813 INFO L87 Difference]: Start difference. First operand 831 states and 945 transitions. Second operand has 10 states, 9 states have (on average 16.11111111111111) internal successors, (145), 10 states have internal predecessors, (145), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:38:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:43,363 INFO L93 Difference]: Finished difference Result 1604 states and 1904 transitions. [2023-12-02 13:38:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:38:43,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 16.11111111111111) internal successors, (145), 10 states have internal predecessors, (145), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 90 [2023-12-02 13:38:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:43,370 INFO L225 Difference]: With dead ends: 1604 [2023-12-02 13:38:43,370 INFO L226 Difference]: Without dead ends: 1603 [2023-12-02 13:38:43,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 232 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-12-02 13:38:43,372 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 212 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:43,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 196 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:38:43,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2023-12-02 13:38:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1519. [2023-12-02 13:38:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1430 states have (on average 1.1818181818181819) internal successors, (1690), 1436 states have internal predecessors, (1690), 75 states have call successors, (75), 7 states have call predecessors, (75), 7 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-12-02 13:38:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 1840 transitions. [2023-12-02 13:38:43,460 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 1840 transitions. Word has length 90 [2023-12-02 13:38:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:43,460 INFO L495 AbstractCegarLoop]: Abstraction has 1519 states and 1840 transitions. [2023-12-02 13:38:43,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 16.11111111111111) internal successors, (145), 10 states have internal predecessors, (145), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:38:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 1840 transitions. [2023-12-02 13:38:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 13:38:43,462 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:43,462 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:43,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 13:38:43,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 13:38:43,663 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:43,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1650313321, now seen corresponding path program 1 times [2023-12-02 13:38:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:43,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631352263] [2023-12-02 13:38:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:43,672 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:43,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216140032] [2023-12-02 13:38:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:43,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:43,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:43,674 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:43,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 13:38:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:43,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:38:43,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 13:38:43,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:44,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:44,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631352263] [2023-12-02 13:38:44,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:44,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216140032] [2023-12-02 13:38:44,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216140032] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:44,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1299836423] [2023-12-02 13:38:44,028 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:38:44,028 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:44,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:44,029 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:44,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:44,904 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:38:44,912 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:44,939 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:47,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27203#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:38:47,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:47,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:38:47,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 13:38:47,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694203484] [2023-12-02 13:38:47,623 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:47,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:38:47,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:38:47,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 13:38:47,624 INFO L87 Difference]: Start difference. First operand 1519 states and 1840 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:38:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:47,842 INFO L93 Difference]: Finished difference Result 1689 states and 2046 transitions. [2023-12-02 13:38:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:38:47,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 98 [2023-12-02 13:38:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:47,849 INFO L225 Difference]: With dead ends: 1689 [2023-12-02 13:38:47,849 INFO L226 Difference]: Without dead ends: 1685 [2023-12-02 13:38:47,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 169 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 13:38:47,850 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 38 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:47,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 192 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2023-12-02 13:38:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1663. [2023-12-02 13:38:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1567 states have (on average 1.1786853860880664) internal successors, (1847), 1573 states have internal predecessors, (1847), 82 states have call successors, (82), 7 states have call predecessors, (82), 7 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2023-12-02 13:38:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2011 transitions. [2023-12-02 13:38:47,966 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2011 transitions. Word has length 98 [2023-12-02 13:38:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:47,967 INFO L495 AbstractCegarLoop]: Abstraction has 1663 states and 2011 transitions. [2023-12-02 13:38:47,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:38:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2011 transitions. [2023-12-02 13:38:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 13:38:47,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:47,969 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:47,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-02 13:38:48,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 13:38:48,170 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:48,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:48,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1751560202, now seen corresponding path program 2 times [2023-12-02 13:38:48,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:48,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712821891] [2023-12-02 13:38:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:48,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:48,180 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:48,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737487899] [2023-12-02 13:38:48,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:38:48,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:48,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:48,181 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:48,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 13:38:48,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 13:38:48,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:38:48,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:38:48,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:38:48,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:38:48,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:48,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712821891] [2023-12-02 13:38:48,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:48,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737487899] [2023-12-02 13:38:48,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737487899] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:48,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [475085074] [2023-12-02 13:38:48,509 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:38:48,509 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:48,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:48,509 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:48,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:49,381 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:38:49,389 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:49,409 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:51,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31598#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:38:51,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:51,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:38:51,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 13:38:51,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984316361] [2023-12-02 13:38:51,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:51,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:38:51,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:51,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:38:51,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 13:38:51,317 INFO L87 Difference]: Start difference. First operand 1663 states and 2011 transitions. Second operand has 12 states, 11 states have (on average 15.909090909090908) internal successors, (175), 12 states have internal predecessors, (175), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 13:38:51,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:51,664 INFO L93 Difference]: Finished difference Result 3157 states and 3922 transitions. [2023-12-02 13:38:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:38:51,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 15.909090909090908) internal successors, (175), 12 states have internal predecessors, (175), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 108 [2023-12-02 13:38:51,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:51,679 INFO L225 Difference]: With dead ends: 3157 [2023-12-02 13:38:51,679 INFO L226 Difference]: Without dead ends: 3156 [2023-12-02 13:38:51,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 286 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 13:38:51,681 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 260 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:51,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 226 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:38:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2023-12-02 13:38:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2877. [2023-12-02 13:38:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2716 states have (on average 1.2234904270986746) internal successors, (3323), 2722 states have internal predecessors, (3323), 147 states have call successors, (147), 7 states have call predecessors, (147), 7 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2023-12-02 13:38:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 3617 transitions. [2023-12-02 13:38:51,834 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 3617 transitions. Word has length 108 [2023-12-02 13:38:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:51,835 INFO L495 AbstractCegarLoop]: Abstraction has 2877 states and 3617 transitions. [2023-12-02 13:38:51,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 15.909090909090908) internal successors, (175), 12 states have internal predecessors, (175), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 13:38:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 3617 transitions. [2023-12-02 13:38:51,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 13:38:51,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:51,838 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:51,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 13:38:52,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 13:38:52,039 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:52,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash -137254237, now seen corresponding path program 2 times [2023-12-02 13:38:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:52,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578437527] [2023-12-02 13:38:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:52,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:52,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:52,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998255643] [2023-12-02 13:38:52,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:38:52,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:52,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:52,049 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:52,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 13:38:52,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 13:38:52,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:38:52,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:38:52,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 13:38:52,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:52,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:52,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578437527] [2023-12-02 13:38:52,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:52,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998255643] [2023-12-02 13:38:52,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998255643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:52,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1568038375] [2023-12-02 13:38:52,434 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:38:52,434 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:52,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:52,435 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:52,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:53,373 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:38:53,382 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:53,418 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:38:56,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38680#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:38:56,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:38:56,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:38:56,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 13:38:56,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654189869] [2023-12-02 13:38:56,179 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:56,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:38:56,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:56,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:38:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 13:38:56,180 INFO L87 Difference]: Start difference. First operand 2877 states and 3617 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:38:56,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:56,491 INFO L93 Difference]: Finished difference Result 4658 states and 5961 transitions. [2023-12-02 13:38:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:38:56,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 119 [2023-12-02 13:38:56,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:56,502 INFO L225 Difference]: With dead ends: 4658 [2023-12-02 13:38:56,502 INFO L226 Difference]: Without dead ends: 2815 [2023-12-02 13:38:56,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 208 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 13:38:56,507 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 101 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:56,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 204 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:38:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2023-12-02 13:38:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2631. [2023-12-02 13:38:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2482 states have (on average 1.2304593070104755) internal successors, (3054), 2488 states have internal predecessors, (3054), 135 states have call successors, (135), 7 states have call predecessors, (135), 7 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-12-02 13:38:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 3324 transitions. [2023-12-02 13:38:56,646 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 3324 transitions. Word has length 119 [2023-12-02 13:38:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:56,646 INFO L495 AbstractCegarLoop]: Abstraction has 2631 states and 3324 transitions. [2023-12-02 13:38:56,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 7 states have internal predecessors, (69), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:38:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 3324 transitions. [2023-12-02 13:38:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 13:38:56,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:56,648 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:56,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 13:38:56,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 13:38:56,849 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:56,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:56,849 INFO L85 PathProgramCache]: Analyzing trace with hash 830494294, now seen corresponding path program 2 times [2023-12-02 13:38:56,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:56,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459984603] [2023-12-02 13:38:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:56,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:56,857 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:56,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544858931] [2023-12-02 13:38:56,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:38:56,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:56,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:56,859 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:56,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 13:38:56,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:38:56,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:38:56,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:38:56,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2023-12-02 13:38:56,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:56,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:56,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459984603] [2023-12-02 13:38:56,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:56,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544858931] [2023-12-02 13:38:56,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544858931] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:56,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:56,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:38:56,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927400110] [2023-12-02 13:38:56,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:56,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:38:56,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:38:56,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:38:56,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:38:56,936 INFO L87 Difference]: Start difference. First operand 2631 states and 3324 transitions. Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:38:57,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:57,080 INFO L93 Difference]: Finished difference Result 2634 states and 3326 transitions. [2023-12-02 13:38:57,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:38:57,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 137 [2023-12-02 13:38:57,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:57,091 INFO L225 Difference]: With dead ends: 2634 [2023-12-02 13:38:57,091 INFO L226 Difference]: Without dead ends: 2633 [2023-12-02 13:38:57,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:38:57,092 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:57,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 113 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:38:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2023-12-02 13:38:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2601. [2023-12-02 13:38:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2453 states have (on average 1.185894822666123) internal successors, (2909), 2460 states have internal predecessors, (2909), 135 states have call successors, (135), 7 states have call predecessors, (135), 7 states have return successors, (135), 133 states have call predecessors, (135), 135 states have call successors, (135) [2023-12-02 13:38:57,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 3179 transitions. [2023-12-02 13:38:57,205 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 3179 transitions. Word has length 137 [2023-12-02 13:38:57,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:57,205 INFO L495 AbstractCegarLoop]: Abstraction has 2601 states and 3179 transitions. [2023-12-02 13:38:57,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:38:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 3179 transitions. [2023-12-02 13:38:57,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 13:38:57,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:57,207 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:57,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 13:38:57,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 13:38:57,408 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:38:57,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:57,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1094146011, now seen corresponding path program 1 times [2023-12-02 13:38:57,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:57,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497548958] [2023-12-02 13:38:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:57,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:57,443 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:38:57,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326367161] [2023-12-02 13:38:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:57,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:57,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:57,448 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:57,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 13:38:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:57,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 13:38:57,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:38:57,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 13:38:58,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:58,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497548958] [2023-12-02 13:38:58,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:38:58,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326367161] [2023-12-02 13:38:58,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326367161] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:58,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702527546] [2023-12-02 13:38:58,075 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 13:38:58,075 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:38:58,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:38:58,075 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:38:58,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:38:58,938 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:38:58,946 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:38:58,967 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:39:01,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53861#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 21 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:39:01,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:39:01,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:39:01,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2023-12-02 13:39:01,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093922910] [2023-12-02 13:39:01,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:01,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 13:39:01,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:39:01,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 13:39:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2761, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 13:39:01,992 INFO L87 Difference]: Start difference. First operand 2601 states and 3179 transitions. Second operand has 30 states, 30 states have (on average 7.966666666666667) internal successors, (239), 30 states have internal predecessors, (239), 14 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2023-12-02 13:39:02,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:02,840 INFO L93 Difference]: Finished difference Result 7221 states and 8619 transitions. [2023-12-02 13:39:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 13:39:02,840 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 7.966666666666667) internal successors, (239), 30 states have internal predecessors, (239), 14 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 140 [2023-12-02 13:39:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:02,871 INFO L225 Difference]: With dead ends: 7221 [2023-12-02 13:39:02,871 INFO L226 Difference]: Without dead ends: 7211 [2023-12-02 13:39:02,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 350 SyntacticMatches, 13 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1241, Invalid=5731, Unknown=0, NotChecked=0, Total=6972 [2023-12-02 13:39:02,875 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 289 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:02,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 514 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:39:02,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7211 states. [2023-12-02 13:39:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7211 to 7058. [2023-12-02 13:39:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7058 states, 6684 states have (on average 1.1337522441651706) internal successors, (7578), 6697 states have internal predecessors, (7578), 353 states have call successors, (353), 15 states have call predecessors, (353), 15 states have return successors, (353), 345 states have call predecessors, (353), 353 states have call successors, (353) [2023-12-02 13:39:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7058 states to 7058 states and 8284 transitions. [2023-12-02 13:39:03,219 INFO L78 Accepts]: Start accepts. Automaton has 7058 states and 8284 transitions. Word has length 140 [2023-12-02 13:39:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:03,219 INFO L495 AbstractCegarLoop]: Abstraction has 7058 states and 8284 transitions. [2023-12-02 13:39:03,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.966666666666667) internal successors, (239), 30 states have internal predecessors, (239), 14 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2023-12-02 13:39:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand 7058 states and 8284 transitions. [2023-12-02 13:39:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 13:39:03,222 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:03,222 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:03,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-02 13:39:03,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:03,423 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:39:03,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:03,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1094146429, now seen corresponding path program 3 times [2023-12-02 13:39:03,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:39:03,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953266059] [2023-12-02 13:39:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:39:03,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:39:03,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735593620] [2023-12-02 13:39:03,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:39:03,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:03,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:03,436 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:03,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 13:39:03,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:39:03,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:39:03,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 13:39:03,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 13:39:03,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 13:39:04,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:39:04,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953266059] [2023-12-02 13:39:04,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:39:04,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735593620] [2023-12-02 13:39:04,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735593620] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:04,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1394003187] [2023-12-02 13:39:04,268 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:39:04,268 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:39:04,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:39:04,269 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:39:04,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:39:05,217 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:39:05,229 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:39:05,273 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:39:08,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '70611#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:39:08,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:39:08,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:39:08,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-12-02 13:39:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104421285] [2023-12-02 13:39:08,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:08,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 13:39:08,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:39:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 13:39:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:39:08,902 INFO L87 Difference]: Start difference. First operand 7058 states and 8284 transitions. Second operand has 14 states, 13 states have (on average 13.153846153846153) internal successors, (171), 14 states have internal predecessors, (171), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:39:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:12,028 INFO L93 Difference]: Finished difference Result 9610 states and 11314 transitions. [2023-12-02 13:39:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 13:39:12,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 13.153846153846153) internal successors, (171), 14 states have internal predecessors, (171), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 140 [2023-12-02 13:39:12,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:12,056 INFO L225 Difference]: With dead ends: 9610 [2023-12-02 13:39:12,056 INFO L226 Difference]: Without dead ends: 9578 [2023-12-02 13:39:12,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 368 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=425, Invalid=2881, Unknown=0, NotChecked=0, Total=3306 [2023-12-02 13:39:12,058 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 420 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:12,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 468 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:39:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9578 states. [2023-12-02 13:39:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9578 to 8362. [2023-12-02 13:39:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8362 states, 7928 states have (on average 1.0949798183652877) internal successors, (8681), 7943 states have internal predecessors, (8681), 413 states have call successors, (413), 15 states have call predecessors, (413), 15 states have return successors, (413), 403 states have call predecessors, (413), 413 states have call successors, (413) [2023-12-02 13:39:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 9507 transitions. [2023-12-02 13:39:12,643 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 9507 transitions. Word has length 140 [2023-12-02 13:39:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:12,643 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 9507 transitions. [2023-12-02 13:39:12,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 13.153846153846153) internal successors, (171), 14 states have internal predecessors, (171), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:39:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 9507 transitions. [2023-12-02 13:39:12,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-02 13:39:12,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:12,647 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:12,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 13:39:12,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:12,849 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:39:12,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:12,849 INFO L85 PathProgramCache]: Analyzing trace with hash 109156451, now seen corresponding path program 2 times [2023-12-02 13:39:12,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:39:12,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802728857] [2023-12-02 13:39:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:12,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:39:12,858 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:39:12,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833681765] [2023-12-02 13:39:12,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:39:12,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:12,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:12,859 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:12,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 13:39:12,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 13:39:12,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:39:12,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 13:39:12,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 6 proven. 431 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 13:39:13,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 6 proven. 431 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 13:39:13,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:39:13,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802728857] [2023-12-02 13:39:13,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:39:13,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833681765] [2023-12-02 13:39:13,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833681765] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:13,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191411647] [2023-12-02 13:39:13,482 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:39:13,483 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:39:13,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:39:13,483 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:39:13,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:39:14,309 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:39:14,317 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:39:14,338 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:39:17,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '91573#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 13:39:17,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:39:17,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:39:17,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-12-02 13:39:17,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350866205] [2023-12-02 13:39:17,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:17,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 13:39:17,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:39:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 13:39:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1817, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 13:39:17,307 INFO L87 Difference]: Start difference. First operand 8362 states and 9507 transitions. Second operand has 21 states, 19 states have (on average 14.421052631578947) internal successors, (274), 21 states have internal predecessors, (274), 15 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 13:39:18,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:18,847 INFO L93 Difference]: Finished difference Result 10120 states and 11552 transitions. [2023-12-02 13:39:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-02 13:39:18,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 14.421052631578947) internal successors, (274), 21 states have internal predecessors, (274), 15 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 163 [2023-12-02 13:39:18,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:18,868 INFO L225 Difference]: With dead ends: 10120 [2023-12-02 13:39:18,868 INFO L226 Difference]: Without dead ends: 10114 [2023-12-02 13:39:18,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 428 SyntacticMatches, 15 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1157, Invalid=5323, Unknown=0, NotChecked=0, Total=6480 [2023-12-02 13:39:18,874 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 322 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:18,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 189 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:39:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10114 states. [2023-12-02 13:39:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10114 to 9756. [2023-12-02 13:39:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9756 states, 9265 states have (on average 1.073394495412844) internal successors, (9945), 9278 states have internal predecessors, (9945), 470 states have call successors, (470), 15 states have call predecessors, (470), 15 states have return successors, (470), 462 states have call predecessors, (470), 470 states have call successors, (470) [2023-12-02 13:39:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9756 states to 9756 states and 10885 transitions. [2023-12-02 13:39:19,552 INFO L78 Accepts]: Start accepts. Automaton has 9756 states and 10885 transitions. Word has length 163 [2023-12-02 13:39:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:19,552 INFO L495 AbstractCegarLoop]: Abstraction has 9756 states and 10885 transitions. [2023-12-02 13:39:19,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 14.421052631578947) internal successors, (274), 21 states have internal predecessors, (274), 15 states have call successors, (16), 1 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 13:39:19,553 INFO L276 IsEmpty]: Start isEmpty. Operand 9756 states and 10885 transitions. [2023-12-02 13:39:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-12-02 13:39:19,557 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:19,557 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:19,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 13:39:19,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:19,757 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:39:19,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:19,758 INFO L85 PathProgramCache]: Analyzing trace with hash 487420895, now seen corresponding path program 4 times [2023-12-02 13:39:19,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:39:19,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124019603] [2023-12-02 13:39:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:19,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:39:19,769 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:39:19,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439495404] [2023-12-02 13:39:19,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:39:19,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:19,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:19,771 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:19,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 13:39:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:19,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:39:19,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 366 proven. 147 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 13:39:20,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 342 proven. 147 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-12-02 13:39:20,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:39:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124019603] [2023-12-02 13:39:20,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:39:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439495404] [2023-12-02 13:39:20,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439495404] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75004512] [2023-12-02 13:39:20,190 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:39:20,190 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:39:20,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:39:20,190 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:39:20,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:39:21,295 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:39:21,303 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:39:21,323 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:39:24,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '114720#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:39:24,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:39:24,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:39:24,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2023-12-02 13:39:24,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736031561] [2023-12-02 13:39:24,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:24,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:39:24,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:39:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:39:24,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:39:24,205 INFO L87 Difference]: Start difference. First operand 9756 states and 10885 transitions. Second operand has 13 states, 13 states have (on average 14.538461538461538) internal successors, (189), 13 states have internal predecessors, (189), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 13:39:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:25,373 INFO L93 Difference]: Finished difference Result 16322 states and 18484 transitions. [2023-12-02 13:39:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:39:25,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.538461538461538) internal successors, (189), 13 states have internal predecessors, (189), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 182 [2023-12-02 13:39:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:25,396 INFO L225 Difference]: With dead ends: 16322 [2023-12-02 13:39:25,396 INFO L226 Difference]: Without dead ends: 10471 [2023-12-02 13:39:25,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 488 SyntacticMatches, 20 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=264, Invalid=1806, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 13:39:25,408 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 340 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:25,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 580 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:39:25,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10471 states. [2023-12-02 13:39:26,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10471 to 8552. [2023-12-02 13:39:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8552 states, 8117 states have (on average 1.065171861525194) internal successors, (8646), 8125 states have internal predecessors, (8646), 414 states have call successors, (414), 15 states have call predecessors, (414), 15 states have return successors, (414), 411 states have call predecessors, (414), 414 states have call successors, (414) [2023-12-02 13:39:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8552 states to 8552 states and 9474 transitions. [2023-12-02 13:39:26,038 INFO L78 Accepts]: Start accepts. Automaton has 8552 states and 9474 transitions. Word has length 182 [2023-12-02 13:39:26,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:26,039 INFO L495 AbstractCegarLoop]: Abstraction has 8552 states and 9474 transitions. [2023-12-02 13:39:26,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.538461538461538) internal successors, (189), 13 states have internal predecessors, (189), 11 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-02 13:39:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 8552 states and 9474 transitions. [2023-12-02 13:39:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-12-02 13:39:26,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:26,043 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:26,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 13:39:26,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 13:39:26,243 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:39:26,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1619807061, now seen corresponding path program 5 times [2023-12-02 13:39:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:39:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768940969] [2023-12-02 13:39:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:39:26,256 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:39:26,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701222813] [2023-12-02 13:39:26,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:39:26,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:26,258 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:26,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 13:39:26,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 13:39:26,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:39:26,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 13:39:26,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 471 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-12-02 13:39:26,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:26,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:39:26,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768940969] [2023-12-02 13:39:26,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:39:26,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701222813] [2023-12-02 13:39:26,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701222813] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:39:26,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [540826469] [2023-12-02 13:39:26,756 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:39:26,756 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:39:26,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:39:26,756 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:39:26,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:39:27,559 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:39:27,567 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:39:27,587 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:39:30,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '142850#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:39:30,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:39:30,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:39:30,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-12-02 13:39:30,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378574702] [2023-12-02 13:39:30,888 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:30,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:39:30,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:39:30,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:39:30,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 13:39:30,890 INFO L87 Difference]: Start difference. First operand 8552 states and 9474 transitions. Second operand has 9 states, 8 states have (on average 14.375) internal successors, (115), 9 states have internal predecessors, (115), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 13:39:31,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:31,799 INFO L93 Difference]: Finished difference Result 8675 states and 9598 transitions. [2023-12-02 13:39:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:39:31,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 14.375) internal successors, (115), 9 states have internal predecessors, (115), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 182 [2023-12-02 13:39:31,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:31,811 INFO L225 Difference]: With dead ends: 8675 [2023-12-02 13:39:31,811 INFO L226 Difference]: Without dead ends: 8674 [2023-12-02 13:39:31,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 326 SyntacticMatches, 17 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:39:31,813 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 61 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:31,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 483 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:39:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8674 states. [2023-12-02 13:39:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8674 to 8552. [2023-12-02 13:39:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8552 states, 8117 states have (on average 1.0650486632992484) internal successors, (8645), 8125 states have internal predecessors, (8645), 414 states have call successors, (414), 15 states have call predecessors, (414), 15 states have return successors, (414), 411 states have call predecessors, (414), 414 states have call successors, (414) [2023-12-02 13:39:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8552 states to 8552 states and 9473 transitions. [2023-12-02 13:39:32,285 INFO L78 Accepts]: Start accepts. Automaton has 8552 states and 9473 transitions. Word has length 182 [2023-12-02 13:39:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:32,286 INFO L495 AbstractCegarLoop]: Abstraction has 8552 states and 9473 transitions. [2023-12-02 13:39:32,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 14.375) internal successors, (115), 9 states have internal predecessors, (115), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 13:39:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 8552 states and 9473 transitions. [2023-12-02 13:39:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-12-02 13:39:32,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:32,290 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:32,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 13:39:32,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 13:39:32,493 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:39:32,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:32,493 INFO L85 PathProgramCache]: Analyzing trace with hash 513127298, now seen corresponding path program 2 times [2023-12-02 13:39:32,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:39:32,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2885890] [2023-12-02 13:39:32,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:32,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:39:32,504 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:39:32,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685148804] [2023-12-02 13:39:32,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:39:32,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:32,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:32,505 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:32,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 13:39:32,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 13:39:32,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:39:32,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:39:32,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 668 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 13:39:32,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 668 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 13:39:33,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:39:33,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2885890] [2023-12-02 13:39:33,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:39:33,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685148804] [2023-12-02 13:39:33,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685148804] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:33,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [41008843] [2023-12-02 13:39:33,082 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:39:33,082 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:39:33,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:39:33,082 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:39:33,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:39:34,019 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 13:39:34,027 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:39:34,048 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:39:36,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '163099#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= |ULTIMATE.start_main_~y3~0#1| 0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (= 2147483647 |ULTIMATE.start_main_~y1~0#1|) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|))' at error location [2023-12-02 13:39:36,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:39:36,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:39:36,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-02 13:39:36,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725536841] [2023-12-02 13:39:36,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:36,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 13:39:36,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:39:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 13:39:36,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:39:36,890 INFO L87 Difference]: Start difference. First operand 8552 states and 9473 transitions. Second operand has 20 states, 19 states have (on average 17.105263157894736) internal successors, (325), 20 states have internal predecessors, (325), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 13:39:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:38,890 INFO L93 Difference]: Finished difference Result 12053 states and 13538 transitions. [2023-12-02 13:39:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 13:39:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 17.105263157894736) internal successors, (325), 20 states have internal predecessors, (325), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 195 [2023-12-02 13:39:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:38,901 INFO L225 Difference]: With dead ends: 12053 [2023-12-02 13:39:38,901 INFO L226 Difference]: Without dead ends: 12052 [2023-12-02 13:39:38,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 527 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:39:38,903 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 501 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:38,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 352 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 13:39:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12052 states. [2023-12-02 13:39:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12052 to 11868. [2023-12-02 13:39:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11868 states, 11257 states have (on average 1.08474726836635) internal successors, (12211), 11268 states have internal predecessors, (12211), 590 states have call successors, (590), 15 states have call predecessors, (590), 15 states have return successors, (590), 584 states have call predecessors, (590), 590 states have call successors, (590) [2023-12-02 13:39:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11868 states to 11868 states and 13391 transitions. [2023-12-02 13:39:39,485 INFO L78 Accepts]: Start accepts. Automaton has 11868 states and 13391 transitions. Word has length 195 [2023-12-02 13:39:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:39,485 INFO L495 AbstractCegarLoop]: Abstraction has 11868 states and 13391 transitions. [2023-12-02 13:39:39,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 17.105263157894736) internal successors, (325), 20 states have internal predecessors, (325), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 13:39:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 11868 states and 13391 transitions. [2023-12-02 13:39:39,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-12-02 13:39:39,490 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:39,490 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:39,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 13:39:39,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 13:39:39,691 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:39:39,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:39,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1906541557, now seen corresponding path program 6 times [2023-12-02 13:39:39,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:39:39,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887495402] [2023-12-02 13:39:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:39:39,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:39:39,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432901758] [2023-12-02 13:39:39,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:39:39,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:39,702 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:39,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 13:39:39,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:39:39,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:39:39,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:39:39,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 315 proven. 241 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-02 13:39:40,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 115 proven. 441 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-02 13:39:40,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:39:40,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887495402] [2023-12-02 13:39:40,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:39:40,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432901758] [2023-12-02 13:39:40,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432901758] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:40,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697688483] [2023-12-02 13:39:40,222 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:39:40,222 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:39:40,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:39:40,223 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:39:40,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:39:41,045 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:39:41,053 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:39:41,073 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:39:44,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '190768#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:39:44,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:39:44,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:39:44,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-12-02 13:39:44,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71451321] [2023-12-02 13:39:44,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:44,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:39:44,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:39:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:39:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 13:39:44,013 INFO L87 Difference]: Start difference. First operand 11868 states and 13391 transitions. Second operand has 11 states, 11 states have (on average 15.909090909090908) internal successors, (175), 11 states have internal predecessors, (175), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 13:39:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:45,028 INFO L93 Difference]: Finished difference Result 18513 states and 21326 transitions. [2023-12-02 13:39:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:39:45,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.909090909090908) internal successors, (175), 11 states have internal predecessors, (175), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 203 [2023-12-02 13:39:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:45,042 INFO L225 Difference]: With dead ends: 18513 [2023-12-02 13:39:45,042 INFO L226 Difference]: Without dead ends: 13108 [2023-12-02 13:39:45,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 551 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 13:39:45,054 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 105 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:45,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 220 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:39:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13108 states. [2023-12-02 13:39:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13108 to 10790. [2023-12-02 13:39:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10790 states, 10224 states have (on average 1.089984350547731) internal successors, (11144), 10235 states have internal predecessors, (11144), 545 states have call successors, (545), 15 states have call predecessors, (545), 15 states have return successors, (545), 539 states have call predecessors, (545), 545 states have call successors, (545) [2023-12-02 13:39:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10790 states to 10790 states and 12234 transitions. [2023-12-02 13:39:45,798 INFO L78 Accepts]: Start accepts. Automaton has 10790 states and 12234 transitions. Word has length 203 [2023-12-02 13:39:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:45,799 INFO L495 AbstractCegarLoop]: Abstraction has 10790 states and 12234 transitions. [2023-12-02 13:39:45,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.909090909090908) internal successors, (175), 11 states have internal predecessors, (175), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 13:39:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 10790 states and 12234 transitions. [2023-12-02 13:39:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-12-02 13:39:45,802 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:45,802 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:45,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 13:39:46,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 13:39:46,003 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:39:46,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:46,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2053920651, now seen corresponding path program 7 times [2023-12-02 13:39:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:39:46,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270745987] [2023-12-02 13:39:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:46,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:39:46,015 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:39:46,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249915947] [2023-12-02 13:39:46,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:39:46,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:46,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:46,017 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:46,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 13:39:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:46,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 13:39:46,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 755 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-12-02 13:39:46,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:46,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:39:46,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270745987] [2023-12-02 13:39:46,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:39:46,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249915947] [2023-12-02 13:39:46,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249915947] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:39:46,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455688991] [2023-12-02 13:39:46,639 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:39:46,640 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:39:46,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:39:46,640 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:39:46,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:39:47,521 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:39:47,528 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:39:47,548 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:39:50,806 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '223934#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:39:50,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:39:50,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:39:50,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 13:39:50,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995562207] [2023-12-02 13:39:50,807 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:50,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:39:50,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:39:50,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:39:50,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 13:39:50,808 INFO L87 Difference]: Start difference. First operand 10790 states and 12234 transitions. Second operand has 10 states, 9 states have (on average 15.333333333333334) internal successors, (138), 10 states have internal predecessors, (138), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 13:39:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:51,701 INFO L93 Difference]: Finished difference Result 11084 states and 12561 transitions. [2023-12-02 13:39:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:39:51,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 15.333333333333334) internal successors, (138), 10 states have internal predecessors, (138), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 224 [2023-12-02 13:39:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:51,712 INFO L225 Difference]: With dead ends: 11084 [2023-12-02 13:39:51,712 INFO L226 Difference]: Without dead ends: 11083 [2023-12-02 13:39:51,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 406 SyntacticMatches, 21 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:39:51,716 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 50 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:51,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 285 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:39:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11083 states. [2023-12-02 13:39:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11083 to 10790. [2023-12-02 13:39:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10790 states, 10224 states have (on average 1.0898865414710486) internal successors, (11143), 10235 states have internal predecessors, (11143), 545 states have call successors, (545), 15 states have call predecessors, (545), 15 states have return successors, (545), 539 states have call predecessors, (545), 545 states have call successors, (545) [2023-12-02 13:39:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10790 states to 10790 states and 12233 transitions. [2023-12-02 13:39:52,264 INFO L78 Accepts]: Start accepts. Automaton has 10790 states and 12233 transitions. Word has length 224 [2023-12-02 13:39:52,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:52,264 INFO L495 AbstractCegarLoop]: Abstraction has 10790 states and 12233 transitions. [2023-12-02 13:39:52,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 15.333333333333334) internal successors, (138), 10 states have internal predecessors, (138), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 13:39:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 10790 states and 12233 transitions. [2023-12-02 13:39:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-12-02 13:39:52,268 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:52,268 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:52,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-02 13:39:52,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:52,469 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:39:52,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:52,469 INFO L85 PathProgramCache]: Analyzing trace with hash -931370806, now seen corresponding path program 3 times [2023-12-02 13:39:52,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:39:52,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112742527] [2023-12-02 13:39:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:52,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:39:52,483 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:39:52,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972910261] [2023-12-02 13:39:52,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:39:52,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:52,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:52,485 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:52,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 13:39:52,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:39:52,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:39:52,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 13:39:52,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 995 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 13:39:52,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 995 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 13:39:53,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:39:53,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112742527] [2023-12-02 13:39:53,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:39:53,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972910261] [2023-12-02 13:39:53,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972910261] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:53,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2037241945] [2023-12-02 13:39:53,095 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:39:53,096 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:39:53,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:39:53,096 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:39:53,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:39:53,894 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:39:53,900 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:39:53,920 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:39:56,255 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '249572#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:39:56,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:39:56,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:39:56,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-02 13:39:56,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289926469] [2023-12-02 13:39:56,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:56,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 13:39:56,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:39:56,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 13:39:56,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 13:39:56,258 INFO L87 Difference]: Start difference. First operand 10790 states and 12233 transitions. Second operand has 24 states, 23 states have (on average 17.0) internal successors, (391), 24 states have internal predecessors, (391), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 13:39:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:57,452 INFO L93 Difference]: Finished difference Result 17410 states and 20253 transitions. [2023-12-02 13:39:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 13:39:57,453 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 17.0) internal successors, (391), 24 states have internal predecessors, (391), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 234 [2023-12-02 13:39:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:57,475 INFO L225 Difference]: With dead ends: 17410 [2023-12-02 13:39:57,475 INFO L226 Difference]: Without dead ends: 17409 [2023-12-02 13:39:57,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 646 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 13:39:57,482 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 452 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:57,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 373 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:39:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17409 states. [2023-12-02 13:39:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17409 to 16400. [2023-12-02 13:39:58,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16400 states, 15538 states have (on average 1.1138499163341486) internal successors, (17307), 15549 states have internal predecessors, (17307), 841 states have call successors, (841), 15 states have call predecessors, (841), 15 states have return successors, (841), 835 states have call predecessors, (841), 841 states have call successors, (841) [2023-12-02 13:39:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16400 states to 16400 states and 18989 transitions. [2023-12-02 13:39:58,618 INFO L78 Accepts]: Start accepts. Automaton has 16400 states and 18989 transitions. Word has length 234 [2023-12-02 13:39:58,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:58,618 INFO L495 AbstractCegarLoop]: Abstraction has 16400 states and 18989 transitions. [2023-12-02 13:39:58,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 17.0) internal successors, (391), 24 states have internal predecessors, (391), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 13:39:58,618 INFO L276 IsEmpty]: Start isEmpty. Operand 16400 states and 18989 transitions. [2023-12-02 13:39:58,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-12-02 13:39:58,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:58,623 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:58,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 13:39:58,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 13:39:58,823 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:39:58,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1664579997, now seen corresponding path program 8 times [2023-12-02 13:39:58,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:39:58,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63717249] [2023-12-02 13:39:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:58,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:39:58,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:39:58,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729643094] [2023-12-02 13:39:58,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:39:58,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:58,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:58,840 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:58,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 13:39:58,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 13:39:58,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:39:58,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 13:39:58,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 0 proven. 664 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-12-02 13:39:59,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:59,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:39:59,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63717249] [2023-12-02 13:39:59,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:39:59,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729643094] [2023-12-02 13:39:59,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729643094] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:39:59,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641593956] [2023-12-02 13:39:59,400 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:39:59,400 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:39:59,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:39:59,400 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:39:59,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:40:00,531 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:40:00,541 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:40:00,580 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:40:04,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '287660#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:40:04,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:40:04,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:40:04,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-12-02 13:40:04,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296893197] [2023-12-02 13:40:04,305 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:40:04,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:40:04,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:40:04,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:40:04,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 13:40:04,306 INFO L87 Difference]: Start difference. First operand 16400 states and 18989 transitions. Second operand has 9 states, 8 states have (on average 13.125) internal successors, (105), 9 states have internal predecessors, (105), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 13:40:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:40:05,702 INFO L93 Difference]: Finished difference Result 25441 states and 29754 transitions. [2023-12-02 13:40:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 13:40:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 13.125) internal successors, (105), 9 states have internal predecessors, (105), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 245 [2023-12-02 13:40:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:40:05,716 INFO L225 Difference]: With dead ends: 25441 [2023-12-02 13:40:05,716 INFO L226 Difference]: Without dead ends: 17265 [2023-12-02 13:40:05,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 446 SyntacticMatches, 23 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 13:40:05,728 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 130 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:40:05,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 505 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:40:05,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17265 states. [2023-12-02 13:40:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17265 to 16264. [2023-12-02 13:40:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16264 states, 15408 states have (on average 1.114291277258567) internal successors, (17169), 15419 states have internal predecessors, (17169), 835 states have call successors, (835), 15 states have call predecessors, (835), 15 states have return successors, (835), 829 states have call predecessors, (835), 835 states have call successors, (835) [2023-12-02 13:40:06,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16264 states to 16264 states and 18839 transitions. [2023-12-02 13:40:06,560 INFO L78 Accepts]: Start accepts. Automaton has 16264 states and 18839 transitions. Word has length 245 [2023-12-02 13:40:06,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:40:06,560 INFO L495 AbstractCegarLoop]: Abstraction has 16264 states and 18839 transitions. [2023-12-02 13:40:06,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 13.125) internal successors, (105), 9 states have internal predecessors, (105), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 13:40:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 16264 states and 18839 transitions. [2023-12-02 13:40:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-12-02 13:40:06,568 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:40:06,568 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:40:06,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 13:40:06,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 13:40:06,769 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:40:06,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:40:06,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1124903491, now seen corresponding path program 9 times [2023-12-02 13:40:06,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:40:06,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286049006] [2023-12-02 13:40:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:06,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:40:06,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:40:06,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852033890] [2023-12-02 13:40:06,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:40:06,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:06,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:06,807 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:40:06,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 13:40:06,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:40:06,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:40:06,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 13:40:06,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:40:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 451 proven. 795 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-12-02 13:40:07,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:40:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 451 proven. 795 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-12-02 13:40:07,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:40:07,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286049006] [2023-12-02 13:40:07,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:40:07,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852033890] [2023-12-02 13:40:07,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852033890] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:40:07,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801821361] [2023-12-02 13:40:07,591 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:40:07,591 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:40:07,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:40:07,591 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:40:07,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:40:08,385 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:40:08,395 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:40:08,419 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:40:12,163 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '335425#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:40:12,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:40:12,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:40:12,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2023-12-02 13:40:12,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887864126] [2023-12-02 13:40:12,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:40:12,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 13:40:12,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:40:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 13:40:12,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 13:40:12,165 INFO L87 Difference]: Start difference. First operand 16264 states and 18839 transitions. Second operand has 22 states, 22 states have (on average 15.272727272727273) internal successors, (336), 22 states have internal predecessors, (336), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 13:40:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:40:15,923 INFO L93 Difference]: Finished difference Result 42498 states and 50264 transitions. [2023-12-02 13:40:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 13:40:15,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 15.272727272727273) internal successors, (336), 22 states have internal predecessors, (336), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 266 [2023-12-02 13:40:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:40:15,957 INFO L225 Difference]: With dead ends: 42498 [2023-12-02 13:40:15,957 INFO L226 Difference]: Without dead ends: 33883 [2023-12-02 13:40:15,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 720 SyntacticMatches, 31 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=437, Invalid=3223, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 13:40:15,969 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 509 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 13:40:15,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1178 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 13:40:15,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33883 states. [2023-12-02 13:40:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33883 to 20239. [2023-12-02 13:40:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20239 states, 19174 states have (on average 1.111244393449463) internal successors, (21307), 19185 states have internal predecessors, (21307), 1044 states have call successors, (1044), 15 states have call predecessors, (1044), 15 states have return successors, (1044), 1038 states have call predecessors, (1044), 1044 states have call successors, (1044) [2023-12-02 13:40:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20239 states to 20239 states and 23395 transitions. [2023-12-02 13:40:17,200 INFO L78 Accepts]: Start accepts. Automaton has 20239 states and 23395 transitions. Word has length 266 [2023-12-02 13:40:17,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:40:17,201 INFO L495 AbstractCegarLoop]: Abstraction has 20239 states and 23395 transitions. [2023-12-02 13:40:17,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 15.272727272727273) internal successors, (336), 22 states have internal predecessors, (336), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 13:40:17,201 INFO L276 IsEmpty]: Start isEmpty. Operand 20239 states and 23395 transitions. [2023-12-02 13:40:17,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-12-02 13:40:17,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:40:17,206 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:40:17,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 13:40:17,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 13:40:17,407 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:40:17,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:40:17,407 INFO L85 PathProgramCache]: Analyzing trace with hash -997410337, now seen corresponding path program 10 times [2023-12-02 13:40:17,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:40:17,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563831640] [2023-12-02 13:40:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:17,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:40:17,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:40:17,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289926042] [2023-12-02 13:40:17,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:40:17,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:17,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:17,419 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:40:17,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 13:40:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:40:17,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 13:40:17,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:40:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1014 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2023-12-02 13:40:18,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:40:18,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:40:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563831640] [2023-12-02 13:40:18,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:40:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289926042] [2023-12-02 13:40:18,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289926042] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:40:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197121799] [2023-12-02 13:40:18,211 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:40:18,211 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:40:18,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:40:18,212 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:40:18,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:40:18,988 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:40:18,995 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:40:19,015 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:40:22,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '405676#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:40:22,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:40:22,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:40:22,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 13:40:22,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023421593] [2023-12-02 13:40:22,538 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:40:22,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:40:22,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:40:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:40:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 13:40:22,539 INFO L87 Difference]: Start difference. First operand 20239 states and 23395 transitions. Second operand has 10 states, 9 states have (on average 14.222222222222221) internal successors, (128), 10 states have internal predecessors, (128), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 13:40:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:40:23,914 INFO L93 Difference]: Finished difference Result 21218 states and 24551 transitions. [2023-12-02 13:40:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:40:23,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 14.222222222222221) internal successors, (128), 10 states have internal predecessors, (128), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 266 [2023-12-02 13:40:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:40:23,934 INFO L225 Difference]: With dead ends: 21218 [2023-12-02 13:40:23,934 INFO L226 Difference]: Without dead ends: 21214 [2023-12-02 13:40:23,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 486 SyntacticMatches, 25 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:40:23,938 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 39 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:40:23,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 442 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:40:23,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21214 states. [2023-12-02 13:40:25,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21214 to 20579. [2023-12-02 13:40:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20579 states, 19497 states have (on average 1.111863363594399) internal successors, (21678), 19508 states have internal predecessors, (21678), 1061 states have call successors, (1061), 15 states have call predecessors, (1061), 15 states have return successors, (1061), 1055 states have call predecessors, (1061), 1061 states have call successors, (1061) [2023-12-02 13:40:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20579 states to 20579 states and 23800 transitions. [2023-12-02 13:40:25,073 INFO L78 Accepts]: Start accepts. Automaton has 20579 states and 23800 transitions. Word has length 266 [2023-12-02 13:40:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:40:25,074 INFO L495 AbstractCegarLoop]: Abstraction has 20579 states and 23800 transitions. [2023-12-02 13:40:25,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 14.222222222222221) internal successors, (128), 10 states have internal predecessors, (128), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 13:40:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 20579 states and 23800 transitions. [2023-12-02 13:40:25,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-12-02 13:40:25,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:40:25,079 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:40:25,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-02 13:40:25,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:25,279 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:40:25,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:40:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1454718911, now seen corresponding path program 11 times [2023-12-02 13:40:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:40:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469456199] [2023-12-02 13:40:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:40:25,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:40:25,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535146103] [2023-12-02 13:40:25,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:40:25,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:25,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:25,293 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:40:25,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-02 13:40:25,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-02 13:40:25,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:40:25,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 13:40:25,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:40:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-12-02 13:40:25,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:40:26,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:40:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469456199] [2023-12-02 13:40:26,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:40:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535146103] [2023-12-02 13:40:26,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535146103] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:40:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501018971] [2023-12-02 13:40:26,224 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:40:26,224 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:40:26,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:40:26,225 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:40:26,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:40:27,181 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:40:27,189 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:40:27,208 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:40:30,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '452767#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:40:30,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:40:30,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:40:30,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-02 13:40:30,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859195650] [2023-12-02 13:40:30,899 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:40:30,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:40:30,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:40:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:40:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:40:30,900 INFO L87 Difference]: Start difference. First operand 20579 states and 23800 transitions. Second operand has 11 states, 10 states have (on average 16.1) internal successors, (161), 11 states have internal predecessors, (161), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 13:40:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:40:33,040 INFO L93 Difference]: Finished difference Result 21637 states and 24940 transitions. [2023-12-02 13:40:33,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 13:40:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 16.1) internal successors, (161), 11 states have internal predecessors, (161), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 266 [2023-12-02 13:40:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:40:33,061 INFO L225 Difference]: With dead ends: 21637 [2023-12-02 13:40:33,061 INFO L226 Difference]: Without dead ends: 20255 [2023-12-02 13:40:33,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 484 SyntacticMatches, 25 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1672 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=419, Invalid=3121, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 13:40:33,067 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 310 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:40:33,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 321 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:40:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20255 states. [2023-12-02 13:40:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20255 to 19787. [2023-12-02 13:40:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19787 states, 18745 states have (on average 1.115870898906375) internal successors, (20917), 18752 states have internal predecessors, (20917), 1021 states have call successors, (1021), 15 states have call predecessors, (1021), 15 states have return successors, (1021), 1019 states have call predecessors, (1021), 1021 states have call successors, (1021) [2023-12-02 13:40:34,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19787 states to 19787 states and 22959 transitions. [2023-12-02 13:40:34,134 INFO L78 Accepts]: Start accepts. Automaton has 19787 states and 22959 transitions. Word has length 266 [2023-12-02 13:40:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:40:34,135 INFO L495 AbstractCegarLoop]: Abstraction has 19787 states and 22959 transitions. [2023-12-02 13:40:34,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 16.1) internal successors, (161), 11 states have internal predecessors, (161), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 13:40:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 19787 states and 22959 transitions. [2023-12-02 13:40:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-12-02 13:40:34,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:40:34,140 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 10, 10, 10, 10, 10, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:40:34,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-02 13:40:34,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:34,341 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:40:34,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:40:34,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1400718823, now seen corresponding path program 12 times [2023-12-02 13:40:34,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:40:34,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179919827] [2023-12-02 13:40:34,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:34,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:40:34,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:40:34,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636352288] [2023-12-02 13:40:34,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:40:34,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:34,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:34,354 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:40:34,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 13:40:34,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:40:34,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:40:34,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 13:40:34,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:40:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 932 proven. 450 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-12-02 13:40:34,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:40:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 860 proven. 450 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-12-02 13:40:34,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:40:34,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179919827] [2023-12-02 13:40:34,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:40:34,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636352288] [2023-12-02 13:40:34,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636352288] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:40:34,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130057764] [2023-12-02 13:40:34,994 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:40:34,994 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:40:34,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:40:34,994 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:40:34,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:40:35,847 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:40:35,855 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:40:35,875 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:40:39,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '500363#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:40:39,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:40:39,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:40:39,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2023-12-02 13:40:39,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885615150] [2023-12-02 13:40:39,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:40:39,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 13:40:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:40:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 13:40:39,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:40:39,676 INFO L87 Difference]: Start difference. First operand 19787 states and 22959 transitions. Second operand has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2023-12-02 13:40:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:40:41,983 INFO L93 Difference]: Finished difference Result 39748 states and 46760 transitions. [2023-12-02 13:40:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:40:41,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 287 [2023-12-02 13:40:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:40:42,017 INFO L225 Difference]: With dead ends: 39748 [2023-12-02 13:40:42,017 INFO L226 Difference]: Without dead ends: 27822 [2023-12-02 13:40:42,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 787 SyntacticMatches, 33 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=247, Invalid=1823, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 13:40:42,033 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 214 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:40:42,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 538 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:40:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27822 states. [2023-12-02 13:40:43,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27822 to 21000. [2023-12-02 13:40:43,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21000 states, 19893 states have (on average 1.1153672145980997) internal successors, (22188), 19900 states have internal predecessors, (22188), 1086 states have call successors, (1086), 15 states have call predecessors, (1086), 15 states have return successors, (1086), 1084 states have call predecessors, (1086), 1086 states have call successors, (1086) [2023-12-02 13:40:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21000 states to 21000 states and 24360 transitions. [2023-12-02 13:40:43,307 INFO L78 Accepts]: Start accepts. Automaton has 21000 states and 24360 transitions. Word has length 287 [2023-12-02 13:40:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:40:43,308 INFO L495 AbstractCegarLoop]: Abstraction has 21000 states and 24360 transitions. [2023-12-02 13:40:43,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2023-12-02 13:40:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 21000 states and 24360 transitions. [2023-12-02 13:40:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-12-02 13:40:43,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:40:43,316 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:40:43,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-02 13:40:43,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:43,517 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:40:43,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:40:43,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1965850587, now seen corresponding path program 2 times [2023-12-02 13:40:43,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:40:43,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137517950] [2023-12-02 13:40:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:43,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:40:43,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:40:43,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736246388] [2023-12-02 13:40:43,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:40:43,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:43,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:43,531 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:40:43,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 13:40:43,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 13:40:43,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:40:43,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 13:40:43,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:40:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 0 proven. 1314 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2023-12-02 13:40:44,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:40:44,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:40:44,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137517950] [2023-12-02 13:40:44,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:40:44,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736246388] [2023-12-02 13:40:44,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736246388] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:40:44,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000516875] [2023-12-02 13:40:44,233 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 13:40:44,233 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:40:44,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:40:44,233 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:40:44,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:40:45,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:40:45,073 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:40:45,092 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:40:48,967 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '568537#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 21 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:40:48,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:40:48,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:40:48,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 13:40:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789378736] [2023-12-02 13:40:48,967 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:40:48,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:40:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:40:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:40:48,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 13:40:48,969 INFO L87 Difference]: Start difference. First operand 21000 states and 24360 transitions. Second operand has 12 states, 11 states have (on average 14.454545454545455) internal successors, (159), 12 states have internal predecessors, (159), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:40:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:40:51,131 INFO L93 Difference]: Finished difference Result 29584 states and 34605 transitions. [2023-12-02 13:40:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 13:40:51,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 14.454545454545455) internal successors, (159), 12 states have internal predecessors, (159), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 308 [2023-12-02 13:40:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:40:51,154 INFO L225 Difference]: With dead ends: 29584 [2023-12-02 13:40:51,154 INFO L226 Difference]: Without dead ends: 21851 [2023-12-02 13:40:51,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 561 SyntacticMatches, 29 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=267, Invalid=2925, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 13:40:51,165 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 214 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:40:51,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1204 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2157 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 13:40:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21851 states. [2023-12-02 13:40:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21851 to 20988. [2023-12-02 13:40:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20988 states, 19881 states have (on average 1.1153865499723354) internal successors, (22175), 19888 states have internal predecessors, (22175), 1086 states have call successors, (1086), 15 states have call predecessors, (1086), 15 states have return successors, (1086), 1084 states have call predecessors, (1086), 1086 states have call successors, (1086) [2023-12-02 13:40:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20988 states to 20988 states and 24347 transitions. [2023-12-02 13:40:52,320 INFO L78 Accepts]: Start accepts. Automaton has 20988 states and 24347 transitions. Word has length 308 [2023-12-02 13:40:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:40:52,320 INFO L495 AbstractCegarLoop]: Abstraction has 20988 states and 24347 transitions. [2023-12-02 13:40:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 14.454545454545455) internal successors, (159), 12 states have internal predecessors, (159), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:40:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 20988 states and 24347 transitions. [2023-12-02 13:40:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-12-02 13:40:52,327 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:40:52,327 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:40:52,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-02 13:40:52,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:52,528 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:40:52,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:40:52,528 INFO L85 PathProgramCache]: Analyzing trace with hash -198450219, now seen corresponding path program 3 times [2023-12-02 13:40:52,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:40:52,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279964878] [2023-12-02 13:40:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:52,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:40:52,540 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:40:52,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558797358] [2023-12-02 13:40:52,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:40:52,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:52,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:52,542 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:40:52,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-02 13:40:52,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:40:52,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:40:52,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 13:40:52,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:40:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 1771 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:40:53,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:40:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 1589 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-12-02 13:40:53,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:40:53,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279964878] [2023-12-02 13:40:53,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:40:53,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558797358] [2023-12-02 13:40:53,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558797358] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:40:53,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766123590] [2023-12-02 13:40:53,875 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 13:40:53,875 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:40:53,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:40:53,875 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:40:53,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:40:54,691 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:40:54,701 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:40:54,721 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:40:59,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '626385#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 21 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:40:59,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:40:59,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:40:59,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 42 [2023-12-02 13:40:59,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636176113] [2023-12-02 13:40:59,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:40:59,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 13:40:59,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:40:59,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 13:40:59,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=4009, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 13:40:59,041 INFO L87 Difference]: Start difference. First operand 20988 states and 24347 transitions. Second operand has 42 states, 42 states have (on average 9.904761904761905) internal successors, (416), 42 states have internal predecessors, (416), 20 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 20 states have call predecessors, (32), 20 states have call successors, (32) [2023-12-02 13:41:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:41:01,451 INFO L93 Difference]: Finished difference Result 27315 states and 31553 transitions. [2023-12-02 13:41:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 13:41:01,452 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 9.904761904761905) internal successors, (416), 42 states have internal predecessors, (416), 20 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 20 states have call predecessors, (32), 20 states have call successors, (32) Word has length 308 [2023-12-02 13:41:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:41:01,479 INFO L225 Difference]: With dead ends: 27315 [2023-12-02 13:41:01,479 INFO L226 Difference]: Without dead ends: 27307 [2023-12-02 13:41:01,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 806 SyntacticMatches, 49 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5832 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2321, Invalid=9235, Unknown=0, NotChecked=0, Total=11556 [2023-12-02 13:41:01,485 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 210 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:41:01,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 568 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:41:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27307 states. [2023-12-02 13:41:02,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27307 to 27145. [2023-12-02 13:41:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27145 states, 25729 states have (on average 1.0987601539119283) internal successors, (28270), 25740 states have internal predecessors, (28270), 1389 states have call successors, (1389), 21 states have call predecessors, (1389), 21 states have return successors, (1389), 1383 states have call predecessors, (1389), 1389 states have call successors, (1389) [2023-12-02 13:41:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27145 states to 27145 states and 31048 transitions. [2023-12-02 13:41:03,056 INFO L78 Accepts]: Start accepts. Automaton has 27145 states and 31048 transitions. Word has length 308 [2023-12-02 13:41:03,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:41:03,056 INFO L495 AbstractCegarLoop]: Abstraction has 27145 states and 31048 transitions. [2023-12-02 13:41:03,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 9.904761904761905) internal successors, (416), 42 states have internal predecessors, (416), 20 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 20 states have call predecessors, (32), 20 states have call successors, (32) [2023-12-02 13:41:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 27145 states and 31048 transitions. [2023-12-02 13:41:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-12-02 13:41:03,064 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:41:03,065 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:41:03,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-12-02 13:41:03,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:41:03,265 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:41:03,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:41:03,266 INFO L85 PathProgramCache]: Analyzing trace with hash -198449801, now seen corresponding path program 13 times [2023-12-02 13:41:03,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:41:03,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93929459] [2023-12-02 13:41:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:41:03,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:41:03,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:41:03,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131977403] [2023-12-02 13:41:03,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:41:03,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:41:03,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:41:03,283 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:41:03,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 13:41:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:41:03,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 13:41:03,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:41:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1801 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 13:41:04,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:41:04,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:41:04,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93929459] [2023-12-02 13:41:04,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:41:04,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131977403] [2023-12-02 13:41:04,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131977403] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:41:04,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [814912136] [2023-12-02 13:41:04,325 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:41:04,325 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:41:04,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:41:04,325 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:41:04,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:41:05,282 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:41:05,290 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:41:05,309 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:41:08,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '687728#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:41:08,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:41:08,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:41:08,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 13:41:08,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98218375] [2023-12-02 13:41:08,863 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:41:08,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:41:08,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:41:08,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:41:08,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:41:08,864 INFO L87 Difference]: Start difference. First operand 27145 states and 31048 transitions. Second operand has 12 states, 11 states have (on average 16.727272727272727) internal successors, (184), 12 states have internal predecessors, (184), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:41:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:41:10,555 INFO L93 Difference]: Finished difference Result 27788 states and 31786 transitions. [2023-12-02 13:41:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:41:10,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 16.727272727272727) internal successors, (184), 12 states have internal predecessors, (184), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 308 [2023-12-02 13:41:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:41:10,630 INFO L225 Difference]: With dead ends: 27788 [2023-12-02 13:41:10,631 INFO L226 Difference]: Without dead ends: 27787 [2023-12-02 13:41:10,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 564 SyntacticMatches, 29 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 13:41:10,633 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:41:10,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 293 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:41:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27787 states. [2023-12-02 13:41:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27787 to 27145. [2023-12-02 13:41:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27145 states, 25729 states have (on average 1.0987212872633993) internal successors, (28269), 25740 states have internal predecessors, (28269), 1389 states have call successors, (1389), 21 states have call predecessors, (1389), 21 states have return successors, (1389), 1383 states have call predecessors, (1389), 1389 states have call successors, (1389) [2023-12-02 13:41:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27145 states to 27145 states and 31047 transitions. [2023-12-02 13:41:12,187 INFO L78 Accepts]: Start accepts. Automaton has 27145 states and 31047 transitions. Word has length 308 [2023-12-02 13:41:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:41:12,188 INFO L495 AbstractCegarLoop]: Abstraction has 27145 states and 31047 transitions. [2023-12-02 13:41:12,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 16.727272727272727) internal successors, (184), 12 states have internal predecessors, (184), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-02 13:41:12,188 INFO L276 IsEmpty]: Start isEmpty. Operand 27145 states and 31047 transitions. [2023-12-02 13:41:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-12-02 13:41:12,197 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:41:12,197 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:41:12,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 13:41:12,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-02 13:41:12,398 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:41:12,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:41:12,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1907918381, now seen corresponding path program 14 times [2023-12-02 13:41:12,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:41:12,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301378509] [2023-12-02 13:41:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:41:12,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:41:12,414 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:41:12,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397571769] [2023-12-02 13:41:12,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:41:12,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:41:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:41:12,416 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:41:12,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 13:41:12,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 13:41:12,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:41:12,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 13:41:12,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:41:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 985 proven. 232 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2023-12-02 13:41:25,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:41:25,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:41:25,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301378509] [2023-12-02 13:41:25,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:41:25,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397571769] [2023-12-02 13:41:25,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397571769] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:41:25,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406349685] [2023-12-02 13:41:25,740 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:41:25,740 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:41:25,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:41:25,741 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:41:25,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:41:26,535 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:41:26,543 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:41:26,563 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:41:34,163 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '749590#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:41:34,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:41:34,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:41:34,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-02 13:41:34,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100914510] [2023-12-02 13:41:34,163 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:41:34,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 13:41:34,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:41:34,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 13:41:34,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2219, Unknown=8, NotChecked=0, Total=2450 [2023-12-02 13:41:34,165 INFO L87 Difference]: Start difference. First operand 27145 states and 31047 transitions. Second operand has 21 states, 18 states have (on average 7.388888888888889) internal successors, (133), 21 states have internal predecessors, (133), 7 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 13:41:36,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 13:41:38,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 13:41:42,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 13:41:50,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:41:50,392 INFO L93 Difference]: Finished difference Result 39162 states and 45213 transitions. [2023-12-02 13:41:50,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-02 13:41:50,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 7.388888888888889) internal successors, (133), 21 states have internal predecessors, (133), 7 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 329 [2023-12-02 13:41:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:41:50,418 INFO L225 Difference]: With dead ends: 39162 [2023-12-02 13:41:50,418 INFO L226 Difference]: Without dead ends: 26593 [2023-12-02 13:41:50,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 593 SyntacticMatches, 31 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3036 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=485, Invalid=5207, Unknown=8, NotChecked=0, Total=5700 [2023-12-02 13:41:50,428 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 229 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 24 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 3031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:41:50,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 887 Invalid, 3031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3003 Invalid, 4 Unknown, 0 Unchecked, 11.8s Time] [2023-12-02 13:41:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26593 states. [2023-12-02 13:41:51,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26593 to 24773. [2023-12-02 13:41:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24773 states, 23473 states have (on average 1.0993481872790014) internal successors, (25805), 23488 states have internal predecessors, (25805), 1273 states have call successors, (1273), 21 states have call predecessors, (1273), 21 states have return successors, (1273), 1263 states have call predecessors, (1273), 1273 states have call successors, (1273) [2023-12-02 13:41:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24773 states to 24773 states and 28351 transitions. [2023-12-02 13:41:52,004 INFO L78 Accepts]: Start accepts. Automaton has 24773 states and 28351 transitions. Word has length 329 [2023-12-02 13:41:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:41:52,005 INFO L495 AbstractCegarLoop]: Abstraction has 24773 states and 28351 transitions. [2023-12-02 13:41:52,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 7.388888888888889) internal successors, (133), 21 states have internal predecessors, (133), 7 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 13:41:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 24773 states and 28351 transitions. [2023-12-02 13:41:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-12-02 13:41:52,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:41:52,013 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:41:52,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-02 13:41:52,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:41:52,214 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:41:52,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:41:52,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1512142691, now seen corresponding path program 3 times [2023-12-02 13:41:52,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:41:52,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931619284] [2023-12-02 13:41:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:41:52,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:41:52,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:41:52,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663876477] [2023-12-02 13:41:52,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:41:52,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:41:52,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:41:52,229 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:41:52,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 13:41:52,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:41:52,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:41:52,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-02 13:41:52,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:41:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2271 backedges. 24 proven. 2071 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-02 13:41:52,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:41:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2271 backedges. 24 proven. 2071 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-02 13:41:54,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:41:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931619284] [2023-12-02 13:41:54,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:41:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663876477] [2023-12-02 13:41:54,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663876477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:41:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805297809] [2023-12-02 13:41:54,961 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:41:54,961 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:41:54,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:41:54,962 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:41:54,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:41:55,774 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:41:55,781 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:41:55,801 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:42:00,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '822438#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 13:42:00,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:42:00,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:42:00,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 33] total 52 [2023-12-02 13:42:00,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806195098] [2023-12-02 13:42:00,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:42:00,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-02 13:42:00,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:42:00,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-02 13:42:00,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1217, Invalid=4789, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 13:42:00,131 INFO L87 Difference]: Start difference. First operand 24773 states and 28351 transitions. Second operand has 53 states, 51 states have (on average 11.019607843137255) internal successors, (562), 53 states have internal predecessors, (562), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2023-12-02 13:42:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:42:05,863 INFO L93 Difference]: Finished difference Result 26032 states and 29777 transitions. [2023-12-02 13:42:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-12-02 13:42:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 11.019607843137255) internal successors, (562), 53 states have internal predecessors, (562), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) Word has length 331 [2023-12-02 13:42:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:42:05,891 INFO L225 Difference]: With dead ends: 26032 [2023-12-02 13:42:05,891 INFO L226 Difference]: Without dead ends: 25982 [2023-12-02 13:42:05,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 884 SyntacticMatches, 31 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10987 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=6048, Invalid=18132, Unknown=0, NotChecked=0, Total=24180 [2023-12-02 13:42:05,898 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 683 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:42:05,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 418 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 13:42:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25982 states. [2023-12-02 13:42:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25982 to 25723. [2023-12-02 13:42:07,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25723 states, 24374 states have (on average 1.094978255518175) internal successors, (26689), 24394 states have internal predecessors, (26689), 1322 states have call successors, (1322), 21 states have call predecessors, (1322), 21 states have return successors, (1322), 1307 states have call predecessors, (1322), 1322 states have call successors, (1322) [2023-12-02 13:42:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25723 states to 25723 states and 29333 transitions. [2023-12-02 13:42:07,509 INFO L78 Accepts]: Start accepts. Automaton has 25723 states and 29333 transitions. Word has length 331 [2023-12-02 13:42:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:42:07,509 INFO L495 AbstractCegarLoop]: Abstraction has 25723 states and 29333 transitions. [2023-12-02 13:42:07,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 11.019607843137255) internal successors, (562), 53 states have internal predecessors, (562), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2023-12-02 13:42:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 25723 states and 29333 transitions. [2023-12-02 13:42:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-12-02 13:42:07,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:42:07,517 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:42:07,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 13:42:07,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-02 13:42:07,717 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:42:07,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:42:07,718 INFO L85 PathProgramCache]: Analyzing trace with hash 913563225, now seen corresponding path program 4 times [2023-12-02 13:42:07,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:42:07,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949922988] [2023-12-02 13:42:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:42:07,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:42:07,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:42:07,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138426475] [2023-12-02 13:42:07,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:42:07,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:42:07,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:42:07,731 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:42:07,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 13:42:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:42:07,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 13:42:07,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:42:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1013 proven. 1015 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2023-12-02 13:42:08,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:42:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 961 proven. 1015 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-12-02 13:42:08,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:42:08,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949922988] [2023-12-02 13:42:08,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:42:08,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138426475] [2023-12-02 13:42:08,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138426475] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:42:08,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931827199] [2023-12-02 13:42:08,642 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:42:08,642 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:42:08,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:42:08,643 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:42:08,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:42:09,381 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:42:09,389 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:42:09,411 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:42:14,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '881868#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 13:42:14,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:42:14,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:42:14,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2023-12-02 13:42:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432148470] [2023-12-02 13:42:14,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:42:14,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 13:42:14,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:42:14,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 13:42:14,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1999, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 13:42:14,625 INFO L87 Difference]: Start difference. First operand 25723 states and 29333 transitions. Second operand has 23 states, 23 states have (on average 16.652173913043477) internal successors, (383), 23 states have internal predecessors, (383), 22 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-12-02 13:42:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:42:18,058 INFO L93 Difference]: Finished difference Result 43574 states and 50543 transitions. [2023-12-02 13:42:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 13:42:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 16.652173913043477) internal successors, (383), 23 states have internal predecessors, (383), 22 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 331 [2023-12-02 13:42:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:42:18,083 INFO L225 Difference]: With dead ends: 43574 [2023-12-02 13:42:18,083 INFO L226 Difference]: Without dead ends: 26529 [2023-12-02 13:42:18,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1023 GetRequests, 907 SyntacticMatches, 38 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=819, Invalid=5501, Unknown=0, NotChecked=0, Total=6320 [2023-12-02 13:42:18,093 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 716 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:42:18,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 658 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 13:42:18,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26529 states. [2023-12-02 13:42:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26529 to 18769. [2023-12-02 13:42:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18769 states, 17764 states have (on average 1.1013848232380095) internal successors, (19565), 17780 states have internal predecessors, (19565), 978 states have call successors, (978), 21 states have call predecessors, (978), 21 states have return successors, (978), 967 states have call predecessors, (978), 978 states have call successors, (978) [2023-12-02 13:42:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18769 states to 18769 states and 21521 transitions. [2023-12-02 13:42:19,367 INFO L78 Accepts]: Start accepts. Automaton has 18769 states and 21521 transitions. Word has length 331 [2023-12-02 13:42:19,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:42:19,368 INFO L495 AbstractCegarLoop]: Abstraction has 18769 states and 21521 transitions. [2023-12-02 13:42:19,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 16.652173913043477) internal successors, (383), 23 states have internal predecessors, (383), 22 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-12-02 13:42:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 18769 states and 21521 transitions. [2023-12-02 13:42:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-12-02 13:42:19,373 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:42:19,373 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:42:19,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-12-02 13:42:19,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-02 13:42:19,573 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:42:19,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:42:19,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1266745901, now seen corresponding path program 5 times [2023-12-02 13:42:19,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:42:19,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740197559] [2023-12-02 13:42:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:42:19,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:42:19,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:42:19,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328961559] [2023-12-02 13:42:19,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:42:19,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:42:19,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:42:19,588 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:42:19,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 13:42:19,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 13:42:19,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:42:19,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 13:42:19,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:42:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 19 proven. 1774 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2023-12-02 13:42:21,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:42:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 18 proven. 1774 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2023-12-02 13:42:22,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:42:22,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740197559] [2023-12-02 13:42:22,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:42:22,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328961559] [2023-12-02 13:42:22,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328961559] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:42:22,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1111827879] [2023-12-02 13:42:22,579 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:42:22,579 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:42:22,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:42:22,580 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:42:22,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:42:23,396 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:42:23,408 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:42:23,428 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:42:27,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '952939#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 13:42:27,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:42:27,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:42:27,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2023-12-02 13:42:27,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463288601] [2023-12-02 13:42:27,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:42:27,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-02 13:42:27,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:42:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-02 13:42:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=4484, Unknown=0, NotChecked=0, Total=5112 [2023-12-02 13:42:27,902 INFO L87 Difference]: Start difference. First operand 18769 states and 21521 transitions. Second operand has 47 states, 44 states have (on average 9.068181818181818) internal successors, (399), 46 states have internal predecessors, (399), 21 states have call successors, (22), 1 states have call predecessors, (22), 3 states have return successors, (25), 24 states have call predecessors, (25), 21 states have call successors, (25) [2023-12-02 13:42:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:42:45,862 INFO L93 Difference]: Finished difference Result 19425 states and 22194 transitions. [2023-12-02 13:42:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-12-02 13:42:45,863 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 9.068181818181818) internal successors, (399), 46 states have internal predecessors, (399), 21 states have call successors, (22), 1 states have call predecessors, (22), 3 states have return successors, (25), 24 states have call predecessors, (25), 21 states have call successors, (25) Word has length 331 [2023-12-02 13:42:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:42:45,878 INFO L225 Difference]: With dead ends: 19425 [2023-12-02 13:42:45,878 INFO L226 Difference]: Without dead ends: 19403 [2023-12-02 13:42:45,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 890 SyntacticMatches, 31 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33875 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=12786, Invalid=59306, Unknown=0, NotChecked=0, Total=72092 [2023-12-02 13:42:45,884 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1616 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:42:45,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1616 Valid, 629 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 13:42:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19403 states. [2023-12-02 13:42:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19403 to 18989. [2023-12-02 13:42:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18989 states, 17974 states have (on average 1.098586847668855) internal successors, (19746), 17991 states have internal predecessors, (19746), 988 states have call successors, (988), 21 states have call predecessors, (988), 21 states have return successors, (988), 976 states have call predecessors, (988), 988 states have call successors, (988) [2023-12-02 13:42:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18989 states to 18989 states and 21722 transitions. [2023-12-02 13:42:47,165 INFO L78 Accepts]: Start accepts. Automaton has 18989 states and 21722 transitions. Word has length 331 [2023-12-02 13:42:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:42:47,165 INFO L495 AbstractCegarLoop]: Abstraction has 18989 states and 21722 transitions. [2023-12-02 13:42:47,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 9.068181818181818) internal successors, (399), 46 states have internal predecessors, (399), 21 states have call successors, (22), 1 states have call predecessors, (22), 3 states have return successors, (25), 24 states have call predecessors, (25), 21 states have call successors, (25) [2023-12-02 13:42:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 18989 states and 21722 transitions. [2023-12-02 13:42:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-12-02 13:42:47,169 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:42:47,170 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:42:47,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-12-02 13:42:47,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 13:42:47,370 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:42:47,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:42:47,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1799622505, now seen corresponding path program 15 times [2023-12-02 13:42:47,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:42:47,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596025263] [2023-12-02 13:42:47,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:42:47,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:42:47,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:42:47,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667825946] [2023-12-02 13:42:47,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:42:47,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:42:47,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:42:47,385 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:42:47,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 13:42:47,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:42:47,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:42:47,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:42:47,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:42:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 0 proven. 1760 refuted. 0 times theorem prover too weak. 746 trivial. 0 not checked. [2023-12-02 13:42:48,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:42:48,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:42:48,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596025263] [2023-12-02 13:42:48,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:42:48,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667825946] [2023-12-02 13:42:48,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667825946] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:42:48,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919586343] [2023-12-02 13:42:48,453 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:42:48,454 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:42:48,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:42:48,454 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:42:48,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:42:49,230 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:42:49,238 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:42:49,258 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:42:53,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '996947#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:42:53,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:42:53,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:42:53,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-02 13:42:53,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486260471] [2023-12-02 13:42:53,544 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:42:53,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:42:53,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:42:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:42:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 13:42:53,545 INFO L87 Difference]: Start difference. First operand 18989 states and 21722 transitions. Second operand has 13 states, 12 states have (on average 14.75) internal successors, (177), 13 states have internal predecessors, (177), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 13:42:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:42:55,506 INFO L93 Difference]: Finished difference Result 19872 states and 22733 transitions. [2023-12-02 13:42:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:42:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 14.75) internal successors, (177), 13 states have internal predecessors, (177), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 350 [2023-12-02 13:42:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:42:55,528 INFO L225 Difference]: With dead ends: 19872 [2023-12-02 13:42:55,529 INFO L226 Difference]: Without dead ends: 19868 [2023-12-02 13:42:55,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 643 SyntacticMatches, 33 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:42:55,532 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 48 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:42:55,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 872 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:42:55,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19868 states. [2023-12-02 13:42:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19868 to 19226. [2023-12-02 13:42:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19226 states, 18199 states have (on average 1.098521896807517) internal successors, (19992), 18216 states have internal predecessors, (19992), 1000 states have call successors, (1000), 21 states have call predecessors, (1000), 21 states have return successors, (1000), 988 states have call predecessors, (1000), 1000 states have call successors, (1000) [2023-12-02 13:42:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19226 states to 19226 states and 21992 transitions. [2023-12-02 13:42:56,841 INFO L78 Accepts]: Start accepts. Automaton has 19226 states and 21992 transitions. Word has length 350 [2023-12-02 13:42:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:42:56,841 INFO L495 AbstractCegarLoop]: Abstraction has 19226 states and 21992 transitions. [2023-12-02 13:42:56,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 14.75) internal successors, (177), 13 states have internal predecessors, (177), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 13:42:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 19226 states and 21992 transitions. [2023-12-02 13:42:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-12-02 13:42:56,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:42:56,846 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:42:56,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-12-02 13:42:57,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:42:57,046 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:42:57,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:42:57,047 INFO L85 PathProgramCache]: Analyzing trace with hash 670816085, now seen corresponding path program 16 times [2023-12-02 13:42:57,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:42:57,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270816079] [2023-12-02 13:42:57,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:42:57,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:42:57,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:42:57,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146352624] [2023-12-02 13:42:57,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:42:57,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:42:57,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:42:57,064 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:42:57,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 13:42:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:42:57,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:42:57,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:42:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 0 proven. 1878 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2023-12-02 13:42:57,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:42:57,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:42:57,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270816079] [2023-12-02 13:42:57,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:42:57,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146352624] [2023-12-02 13:42:57,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146352624] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:42:57,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477568821] [2023-12-02 13:42:57,951 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:42:57,951 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:42:57,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:42:57,951 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:42:57,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:42:58,726 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:42:58,734 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:42:58,754 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:43:02,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1041334#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:43:02,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:43:02,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:43:02,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-02 13:43:02,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334576720] [2023-12-02 13:43:02,408 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:43:02,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:43:02,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:43:02,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 13:43:02,409 INFO L87 Difference]: Start difference. First operand 19226 states and 21992 transitions. Second operand has 11 states, 10 states have (on average 15.1) internal successors, (151), 11 states have internal predecessors, (151), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 13:43:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:43:04,324 INFO L93 Difference]: Finished difference Result 20156 states and 23057 transitions. [2023-12-02 13:43:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:43:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 15.1) internal successors, (151), 11 states have internal predecessors, (151), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 350 [2023-12-02 13:43:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:43:04,343 INFO L225 Difference]: With dead ends: 20156 [2023-12-02 13:43:04,344 INFO L226 Difference]: Without dead ends: 20155 [2023-12-02 13:43:04,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 645 SyntacticMatches, 33 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:43:04,348 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 53 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:43:04,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 459 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:43:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2023-12-02 13:43:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 19226. [2023-12-02 13:43:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19226 states, 18199 states have (on average 1.0984669487334469) internal successors, (19991), 18216 states have internal predecessors, (19991), 1000 states have call successors, (1000), 21 states have call predecessors, (1000), 21 states have return successors, (1000), 988 states have call predecessors, (1000), 1000 states have call successors, (1000) [2023-12-02 13:43:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19226 states to 19226 states and 21991 transitions. [2023-12-02 13:43:05,692 INFO L78 Accepts]: Start accepts. Automaton has 19226 states and 21991 transitions. Word has length 350 [2023-12-02 13:43:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:43:05,693 INFO L495 AbstractCegarLoop]: Abstraction has 19226 states and 21991 transitions. [2023-12-02 13:43:05,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 15.1) internal successors, (151), 11 states have internal predecessors, (151), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 13:43:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 19226 states and 21991 transitions. [2023-12-02 13:43:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-12-02 13:43:05,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:05,697 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:43:05,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-12-02 13:43:05,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:05,898 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:43:05,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:05,898 INFO L85 PathProgramCache]: Analyzing trace with hash -425973971, now seen corresponding path program 17 times [2023-12-02 13:43:05,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:05,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864691243] [2023-12-02 13:43:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:05,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:05,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:05,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293800673] [2023-12-02 13:43:05,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:43:05,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:05,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:05,912 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:05,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 13:43:06,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-12-02 13:43:06,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:43:06,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 13:43:06,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2015 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-12-02 13:43:06,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:43:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2362 backedges. 0 proven. 2015 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2023-12-02 13:43:07,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:43:07,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864691243] [2023-12-02 13:43:07,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:43:07,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293800673] [2023-12-02 13:43:07,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293800673] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:43:07,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2018521925] [2023-12-02 13:43:07,628 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:43:07,629 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:43:07,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:43:07,629 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:43:07,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:43:08,432 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:43:08,440 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:43:08,459 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:43:12,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1087047#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:43:12,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:43:12,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:43:12,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-02 13:43:12,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645561721] [2023-12-02 13:43:12,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:43:12,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 13:43:12,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 13:43:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2061, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 13:43:12,870 INFO L87 Difference]: Start difference. First operand 19226 states and 21991 transitions. Second operand has 24 states, 23 states have (on average 17.869565217391305) internal successors, (411), 24 states have internal predecessors, (411), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 13:43:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:43:23,372 INFO L93 Difference]: Finished difference Result 26404 states and 30052 transitions. [2023-12-02 13:43:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2023-12-02 13:43:23,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 17.869565217391305) internal successors, (411), 24 states have internal predecessors, (411), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 350 [2023-12-02 13:43:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:43:23,397 INFO L225 Difference]: With dead ends: 26404 [2023-12-02 13:43:23,397 INFO L226 Difference]: Without dead ends: 25536 [2023-12-02 13:43:23,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1177 GetRequests, 968 SyntacticMatches, 33 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15002 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=6413, Invalid=25093, Unknown=0, NotChecked=0, Total=31506 [2023-12-02 13:43:23,403 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 2296 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2298 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:43:23,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2298 Valid, 506 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 13:43:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25536 states. [2023-12-02 13:43:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25536 to 18929. [2023-12-02 13:43:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18929 states, 17917 states have (on average 1.097951666015516) internal successors, (19672), 17932 states have internal predecessors, (19672), 985 states have call successors, (985), 21 states have call predecessors, (985), 21 states have return successors, (985), 975 states have call predecessors, (985), 985 states have call successors, (985) [2023-12-02 13:43:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18929 states to 18929 states and 21642 transitions. [2023-12-02 13:43:24,816 INFO L78 Accepts]: Start accepts. Automaton has 18929 states and 21642 transitions. Word has length 350 [2023-12-02 13:43:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:43:24,817 INFO L495 AbstractCegarLoop]: Abstraction has 18929 states and 21642 transitions. [2023-12-02 13:43:24,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 17.869565217391305) internal successors, (411), 24 states have internal predecessors, (411), 19 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2023-12-02 13:43:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 18929 states and 21642 transitions. [2023-12-02 13:43:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-12-02 13:43:24,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:24,821 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:43:24,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-12-02 13:43:25,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-12-02 13:43:25,022 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:43:25,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1211441501, now seen corresponding path program 18 times [2023-12-02 13:43:25,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:25,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748938428] [2023-12-02 13:43:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:25,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:25,034 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:25,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014284079] [2023-12-02 13:43:25,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:43:25,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:25,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:25,035 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:25,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-02 13:43:25,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:43:25,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:43:25,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 13:43:25,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2840 backedges. 758 proven. 1808 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 13:43:25,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:43:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2840 backedges. 758 proven. 1808 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 13:43:26,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:43:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748938428] [2023-12-02 13:43:26,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:43:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014284079] [2023-12-02 13:43:26,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014284079] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:43:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437083818] [2023-12-02 13:43:26,232 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:43:26,233 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:43:26,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:43:26,233 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:43:26,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:43:27,081 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:43:27,089 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:43:27,108 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:43:31,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1139697#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:43:31,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:43:31,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:43:31,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2023-12-02 13:43:31,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423036386] [2023-12-02 13:43:31,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:43:31,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 13:43:31,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:31,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 13:43:31,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2440, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 13:43:31,090 INFO L87 Difference]: Start difference. First operand 18929 states and 21642 transitions. Second operand has 28 states, 28 states have (on average 16.392857142857142) internal successors, (459), 28 states have internal predecessors, (459), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2023-12-02 13:43:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:43:34,728 INFO L93 Difference]: Finished difference Result 33990 states and 39570 transitions. [2023-12-02 13:43:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 13:43:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 16.392857142857142) internal successors, (459), 28 states have internal predecessors, (459), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 371 [2023-12-02 13:43:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:43:34,754 INFO L225 Difference]: With dead ends: 33990 [2023-12-02 13:43:34,754 INFO L226 Difference]: Without dead ends: 26416 [2023-12-02 13:43:34,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1120 GetRequests, 1015 SyntacticMatches, 45 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3356 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=460, Invalid=3322, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 13:43:34,761 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 287 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:43:34,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1226 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 13:43:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26416 states. [2023-12-02 13:43:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26416 to 21448. [2023-12-02 13:43:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21448 states, 20303 states have (on average 1.0987538787371325) internal successors, (22308), 20318 states have internal predecessors, (22308), 1118 states have call successors, (1118), 21 states have call predecessors, (1118), 21 states have return successors, (1118), 1108 states have call predecessors, (1118), 1118 states have call successors, (1118) [2023-12-02 13:43:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21448 states to 21448 states and 24544 transitions. [2023-12-02 13:43:36,298 INFO L78 Accepts]: Start accepts. Automaton has 21448 states and 24544 transitions. Word has length 371 [2023-12-02 13:43:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:43:36,298 INFO L495 AbstractCegarLoop]: Abstraction has 21448 states and 24544 transitions. [2023-12-02 13:43:36,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 16.392857142857142) internal successors, (459), 28 states have internal predecessors, (459), 26 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2023-12-02 13:43:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 21448 states and 24544 transitions. [2023-12-02 13:43:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-12-02 13:43:36,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:36,303 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:43:36,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-12-02 13:43:36,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-12-02 13:43:36,503 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:43:36,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:36,504 INFO L85 PathProgramCache]: Analyzing trace with hash 537529103, now seen corresponding path program 6 times [2023-12-02 13:43:36,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:36,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357585061] [2023-12-02 13:43:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:36,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:36,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:36,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051254234] [2023-12-02 13:43:36,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:43:36,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:36,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:36,517 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:36,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-02 13:43:36,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:43:36,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:43:36,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:43:36,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2826 backedges. 15 proven. 2553 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-12-02 13:43:37,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:43:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2826 backedges. 15 proven. 2553 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-12-02 13:43:37,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:43:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357585061] [2023-12-02 13:43:37,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:43:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051254234] [2023-12-02 13:43:37,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051254234] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:43:37,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [568500377] [2023-12-02 13:43:37,928 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:43:37,928 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:43:37,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:43:37,928 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:43:37,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:43:38,684 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:43:38,691 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:43:38,711 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:43:42,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1203319#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 1 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) |ULTIMATE.start_main_~y2~0#1|)))' at error location [2023-12-02 13:43:42,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:43:42,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:43:42,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2023-12-02 13:43:42,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104065094] [2023-12-02 13:43:42,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:43:42,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 13:43:42,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:42,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 13:43:42,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=3585, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 13:43:42,979 INFO L87 Difference]: Start difference. First operand 21448 states and 24544 transitions. Second operand has 41 states, 39 states have (on average 16.256410256410255) internal successors, (634), 41 states have internal predecessors, (634), 35 states have call successors, (36), 1 states have call predecessors, (36), 2 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2023-12-02 13:43:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:43:50,169 INFO L93 Difference]: Finished difference Result 37965 states and 43420 transitions. [2023-12-02 13:43:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-12-02 13:43:50,170 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 16.256410256410255) internal successors, (634), 41 states have internal predecessors, (634), 35 states have call successors, (36), 1 states have call predecessors, (36), 2 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) Word has length 373 [2023-12-02 13:43:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:43:50,204 INFO L225 Difference]: With dead ends: 37965 [2023-12-02 13:43:50,205 INFO L226 Difference]: Without dead ends: 37903 [2023-12-02 13:43:50,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1018 SyntacticMatches, 35 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12228 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=6335, Invalid=20397, Unknown=0, NotChecked=0, Total=26732 [2023-12-02 13:43:50,212 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1116 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:43:50,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 346 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 13:43:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37903 states. [2023-12-02 13:43:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37903 to 35243. [2023-12-02 13:43:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35243 states, 33415 states have (on average 1.0657189884782283) internal successors, (35611), 33424 states have internal predecessors, (35611), 1801 states have call successors, (1801), 21 states have call predecessors, (1801), 21 states have return successors, (1801), 1797 states have call predecessors, (1801), 1801 states have call successors, (1801) [2023-12-02 13:43:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35243 states to 35243 states and 39213 transitions. [2023-12-02 13:43:53,481 INFO L78 Accepts]: Start accepts. Automaton has 35243 states and 39213 transitions. Word has length 373 [2023-12-02 13:43:53,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:43:53,481 INFO L495 AbstractCegarLoop]: Abstraction has 35243 states and 39213 transitions. [2023-12-02 13:43:53,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 16.256410256410255) internal successors, (634), 41 states have internal predecessors, (634), 35 states have call successors, (36), 1 states have call predecessors, (36), 2 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2023-12-02 13:43:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 35243 states and 39213 transitions. [2023-12-02 13:43:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-12-02 13:43:53,486 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:53,487 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:43:53,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-12-02 13:43:53,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:53,687 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:43:53,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:53,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1866029699, now seen corresponding path program 19 times [2023-12-02 13:43:53,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:53,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770628167] [2023-12-02 13:43:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:53,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:53,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:53,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3995962] [2023-12-02 13:43:53,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:43:53,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:53,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:53,703 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:53,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-12-02 13:43:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:43:53,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:43:53,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3195 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2023-12-02 13:43:54,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:43:54,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:43:54,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770628167] [2023-12-02 13:43:54,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:43:54,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3995962] [2023-12-02 13:43:54,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3995962] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:43:54,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [232976679] [2023-12-02 13:43:54,706 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:43:54,706 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:43:54,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:43:54,706 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:43:54,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:43:55,646 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:43:55,654 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:43:55,674 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:43:59,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1285660#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:43:59,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:43:59,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:43:59,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-02 13:43:59,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166434637] [2023-12-02 13:43:59,960 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:43:59,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 13:43:59,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:59,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 13:43:59,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:43:59,961 INFO L87 Difference]: Start difference. First operand 35243 states and 39213 transitions. Second operand has 14 states, 13 states have (on average 15.0) internal successors, (195), 14 states have internal predecessors, (195), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 13:44:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:04,132 INFO L93 Difference]: Finished difference Result 38516 states and 42772 transitions. [2023-12-02 13:44:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:44:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 15.0) internal successors, (195), 14 states have internal predecessors, (195), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 392 [2023-12-02 13:44:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:04,168 INFO L225 Difference]: With dead ends: 38516 [2023-12-02 13:44:04,168 INFO L226 Difference]: Without dead ends: 38512 [2023-12-02 13:44:04,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 722 SyntacticMatches, 37 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 13:44:04,174 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 49 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:04,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1044 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:44:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38512 states. [2023-12-02 13:44:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38512 to 35214. [2023-12-02 13:44:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35214 states, 33387 states have (on average 1.06568424836014) internal successors, (35580), 33396 states have internal predecessors, (35580), 1800 states have call successors, (1800), 21 states have call predecessors, (1800), 21 states have return successors, (1800), 1796 states have call predecessors, (1800), 1800 states have call successors, (1800) [2023-12-02 13:44:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35214 states to 35214 states and 39180 transitions. [2023-12-02 13:44:07,490 INFO L78 Accepts]: Start accepts. Automaton has 35214 states and 39180 transitions. Word has length 392 [2023-12-02 13:44:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:07,491 INFO L495 AbstractCegarLoop]: Abstraction has 35214 states and 39180 transitions. [2023-12-02 13:44:07,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 15.0) internal successors, (195), 14 states have internal predecessors, (195), 11 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-12-02 13:44:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 35214 states and 39180 transitions. [2023-12-02 13:44:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-12-02 13:44:07,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:07,496 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:44:07,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-12-02 13:44:07,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:07,697 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:44:07,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:07,697 INFO L85 PathProgramCache]: Analyzing trace with hash -278902753, now seen corresponding path program 20 times [2023-12-02 13:44:07,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:07,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326078292] [2023-12-02 13:44:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:07,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:07,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:44:07,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057594915] [2023-12-02 13:44:07,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:44:07,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:07,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:07,749 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:07,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-12-02 13:44:07,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 13:44:07,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:44:07,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 13:44:07,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3143 backedges. 1408 proven. 334 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2023-12-02 13:44:20,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:44:21,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:21,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326078292] [2023-12-02 13:44:21,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:44:21,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057594915] [2023-12-02 13:44:21,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057594915] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:44:21,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22170176] [2023-12-02 13:44:21,871 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:44:21,871 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:44:21,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:44:21,871 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:44:21,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:44:22,650 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:44:22,658 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:44:22,677 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:44:31,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1368416#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:44:31,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:44:31,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:44:31,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-02 13:44:31,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353525207] [2023-12-02 13:44:31,183 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:44:31,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 13:44:31,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:44:31,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 13:44:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2416, Unknown=7, NotChecked=0, Total=2652 [2023-12-02 13:44:31,185 INFO L87 Difference]: Start difference. First operand 35214 states and 39180 transitions. Second operand has 23 states, 20 states have (on average 7.55) internal successors, (151), 23 states have internal predecessors, (151), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-02 13:44:33,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 13:44:39,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 13:44:45,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 13:44:51,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:44:51,664 INFO L93 Difference]: Finished difference Result 36643 states and 40689 transitions. [2023-12-02 13:44:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 13:44:51,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 7.55) internal successors, (151), 23 states have internal predecessors, (151), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 392 [2023-12-02 13:44:51,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:44:51,698 INFO L225 Difference]: With dead ends: 36643 [2023-12-02 13:44:51,698 INFO L226 Difference]: Without dead ends: 35254 [2023-12-02 13:44:51,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 711 SyntacticMatches, 37 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3649 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=549, Invalid=6250, Unknown=7, NotChecked=0, Total=6806 [2023-12-02 13:44:51,704 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 284 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 3862 mSolverCounterSat, 26 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 3893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3862 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:44:51,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1115 Invalid, 3893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3862 Invalid, 5 Unknown, 0 Unchecked, 13.3s Time] [2023-12-02 13:44:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35254 states. [2023-12-02 13:44:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35254 to 33780. [2023-12-02 13:44:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33780 states, 32029 states have (on average 1.0628492928283744) internal successors, (34042), 32038 states have internal predecessors, (34042), 1724 states have call successors, (1724), 21 states have call predecessors, (1724), 21 states have return successors, (1724), 1720 states have call predecessors, (1724), 1724 states have call successors, (1724) [2023-12-02 13:44:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33780 states to 33780 states and 37490 transitions. [2023-12-02 13:44:55,015 INFO L78 Accepts]: Start accepts. Automaton has 33780 states and 37490 transitions. Word has length 392 [2023-12-02 13:44:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:44:55,015 INFO L495 AbstractCegarLoop]: Abstraction has 33780 states and 37490 transitions. [2023-12-02 13:44:55,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 7.55) internal successors, (151), 23 states have internal predecessors, (151), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-02 13:44:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 33780 states and 37490 transitions. [2023-12-02 13:44:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2023-12-02 13:44:55,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:44:55,021 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:44:55,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-12-02 13:44:55,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-12-02 13:44:55,221 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:44:55,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:44:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash -955392638, now seen corresponding path program 3 times [2023-12-02 13:44:55,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:44:55,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538105382] [2023-12-02 13:44:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:44:55,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:44:55,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:44:55,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699065294] [2023-12-02 13:44:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:44:55,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:44:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:44:55,237 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:44:55,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-12-02 13:44:55,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:44:55,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:44:55,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 13:44:55,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:44:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3557 backedges. 0 proven. 3213 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 13:44:55,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:44:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3557 backedges. 0 proven. 3213 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 13:44:56,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:44:56,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538105382] [2023-12-02 13:44:56,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:44:56,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699065294] [2023-12-02 13:44:56,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699065294] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:44:56,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694169424] [2023-12-02 13:44:56,440 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:44:56,440 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:44:56,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:44:56,440 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:44:56,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:44:57,274 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-12-02 13:44:57,281 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:44:57,300 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:45:01,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1448802#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= 1 ~counter~0) (<= |ULTIMATE.start_main_~y3~0#1| 0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (= 2147483647 |ULTIMATE.start_main_~y1~0#1|) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|))' at error location [2023-12-02 13:45:01,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:45:01,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:45:01,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2023-12-02 13:45:01,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323868592] [2023-12-02 13:45:01,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:45:01,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-02 13:45:01,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:45:01,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-02 13:45:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=868, Invalid=2792, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 13:45:01,521 INFO L87 Difference]: Start difference. First operand 33780 states and 37490 transitions. Second operand has 40 states, 39 states have (on average 17.564102564102566) internal successors, (685), 40 states have internal predecessors, (685), 39 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2023-12-02 13:45:13,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:45:13,514 INFO L93 Difference]: Finished difference Result 70501 states and 79582 transitions. [2023-12-02 13:45:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 13:45:13,515 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 17.564102564102566) internal successors, (685), 40 states have internal predecessors, (685), 39 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) Word has length 405 [2023-12-02 13:45:13,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:45:13,593 INFO L225 Difference]: With dead ends: 70501 [2023-12-02 13:45:13,593 INFO L226 Difference]: Without dead ends: 70500 [2023-12-02 13:45:13,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1213 GetRequests, 1117 SyntacticMatches, 37 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3777 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=868, Invalid=2792, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 13:45:13,602 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1578 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:45:13,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1578 Valid, 696 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 13:45:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70500 states. [2023-12-02 13:45:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70500 to 49340. [2023-12-02 13:45:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49340 states, 46769 states have (on average 1.086232333383224) internal successors, (50802), 46778 states have internal predecessors, (50802), 2544 states have call successors, (2544), 21 states have call predecessors, (2544), 21 states have return successors, (2544), 2540 states have call predecessors, (2544), 2544 states have call successors, (2544) [2023-12-02 13:45:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49340 states to 49340 states and 55890 transitions. [2023-12-02 13:45:18,148 INFO L78 Accepts]: Start accepts. Automaton has 49340 states and 55890 transitions. Word has length 405 [2023-12-02 13:45:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:45:18,148 INFO L495 AbstractCegarLoop]: Abstraction has 49340 states and 55890 transitions. [2023-12-02 13:45:18,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 17.564102564102566) internal successors, (685), 40 states have internal predecessors, (685), 39 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2023-12-02 13:45:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 49340 states and 55890 transitions. [2023-12-02 13:45:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2023-12-02 13:45:18,156 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:45:18,156 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:45:18,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-12-02 13:45:18,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-12-02 13:45:18,357 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:45:18,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:45:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1355953097, now seen corresponding path program 21 times [2023-12-02 13:45:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:45:18,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859997497] [2023-12-02 13:45:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:18,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:45:18,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:45:18,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266152792] [2023-12-02 13:45:18,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:45:18,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:45:18,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:45:18,373 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:45:18,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-12-02 13:45:18,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:45:18,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:45:18,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 13:45:18,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:45:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3571 backedges. 937 proven. 2290 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 13:45:19,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:45:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3571 backedges. 937 proven. 2290 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 13:45:19,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:45:19,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859997497] [2023-12-02 13:45:19,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:45:19,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266152792] [2023-12-02 13:45:19,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266152792] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:45:19,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264201112] [2023-12-02 13:45:19,587 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:45:19,587 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:45:19,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:45:19,587 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:45:19,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:45:20,457 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:45:20,468 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:45:20,499 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:45:24,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1583746#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 1 ~counter~0) (<= ~counter~0 20) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:45:24,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:45:24,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:45:24,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2023-12-02 13:45:24,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928964894] [2023-12-02 13:45:24,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:45:24,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 13:45:24,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:45:24,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 13:45:24,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=2723, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 13:45:24,802 INFO L87 Difference]: Start difference. First operand 49340 states and 55890 transitions. Second operand has 31 states, 31 states have (on average 16.548387096774192) internal successors, (513), 31 states have internal predecessors, (513), 29 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2023-12-02 13:45:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:45:32,614 INFO L93 Difference]: Finished difference Result 85034 states and 97924 transitions. [2023-12-02 13:45:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 13:45:32,614 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 16.548387096774192) internal successors, (513), 31 states have internal predecessors, (513), 29 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) Word has length 413 [2023-12-02 13:45:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:45:32,684 INFO L225 Difference]: With dead ends: 85034 [2023-12-02 13:45:32,684 INFO L226 Difference]: Without dead ends: 66174 [2023-12-02 13:45:32,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1247 GetRequests, 1133 SyntacticMatches, 50 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3989 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=532, Invalid=3758, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 13:45:32,701 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 364 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:45:32,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1714 Invalid, 2424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 13:45:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66174 states. [2023-12-02 13:45:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66174 to 56132. [2023-12-02 13:45:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56132 states, 53205 states have (on average 1.0874165961845692) internal successors, (57856), 53214 states have internal predecessors, (57856), 2900 states have call successors, (2900), 21 states have call predecessors, (2900), 21 states have return successors, (2900), 2896 states have call predecessors, (2900), 2900 states have call successors, (2900) [2023-12-02 13:45:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56132 states to 56132 states and 63656 transitions. [2023-12-02 13:45:37,902 INFO L78 Accepts]: Start accepts. Automaton has 56132 states and 63656 transitions. Word has length 413 [2023-12-02 13:45:37,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:45:37,902 INFO L495 AbstractCegarLoop]: Abstraction has 56132 states and 63656 transitions. [2023-12-02 13:45:37,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 16.548387096774192) internal successors, (513), 31 states have internal predecessors, (513), 29 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2023-12-02 13:45:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 56132 states and 63656 transitions. [2023-12-02 13:45:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-12-02 13:45:37,909 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:45:37,909 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:45:37,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-12-02 13:45:38,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-12-02 13:45:38,110 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:45:38,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:45:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash -38159673, now seen corresponding path program 4 times [2023-12-02 13:45:38,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:45:38,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322574895] [2023-12-02 13:45:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:38,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:45:38,125 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:45:38,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726894824] [2023-12-02 13:45:38,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:45:38,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:45:38,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:45:38,127 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:45:38,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-12-02 13:45:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:45:38,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 13:45:38,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:45:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3928 backedges. 0 proven. 2727 refuted. 0 times theorem prover too weak. 1201 trivial. 0 not checked. [2023-12-02 13:45:39,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:45:39,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:45:39,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322574895] [2023-12-02 13:45:39,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:45:39,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726894824] [2023-12-02 13:45:39,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726894824] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:45:39,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347829269] [2023-12-02 13:45:39,298 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 13:45:39,298 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:45:39,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:45:39,299 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:45:39,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:45:40,064 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:45:40,072 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:45:40,092 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:45:45,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1741162#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 21 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:45:45,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:45:45,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:45:45,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-02 13:45:45,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537328652] [2023-12-02 13:45:45,158 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:45:45,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 13:45:45,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:45:45,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 13:45:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 13:45:45,159 INFO L87 Difference]: Start difference. First operand 56132 states and 63656 transitions. Second operand has 15 states, 14 states have (on average 15.214285714285714) internal successors, (213), 15 states have internal predecessors, (213), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-12-02 13:45:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:45:50,912 INFO L93 Difference]: Finished difference Result 58767 states and 66518 transitions. [2023-12-02 13:45:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:45:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 15.214285714285714) internal successors, (213), 15 states have internal predecessors, (213), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 434 [2023-12-02 13:45:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:45:50,969 INFO L225 Difference]: With dead ends: 58767 [2023-12-02 13:45:50,969 INFO L226 Difference]: Without dead ends: 58763 [2023-12-02 13:45:50,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 799 SyntacticMatches, 41 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=181, Invalid=1799, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 13:45:50,976 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 51 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:45:50,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1305 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2399 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 13:45:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58763 states. [2023-12-02 13:45:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58763 to 56103. [2023-12-02 13:45:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56103 states, 53177 states have (on average 1.087387404328939) internal successors, (57824), 53186 states have internal predecessors, (57824), 2899 states have call successors, (2899), 21 states have call predecessors, (2899), 21 states have return successors, (2899), 2895 states have call predecessors, (2899), 2899 states have call successors, (2899) [2023-12-02 13:45:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56103 states to 56103 states and 63622 transitions. [2023-12-02 13:45:55,878 INFO L78 Accepts]: Start accepts. Automaton has 56103 states and 63622 transitions. Word has length 434 [2023-12-02 13:45:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:45:55,878 INFO L495 AbstractCegarLoop]: Abstraction has 56103 states and 63622 transitions. [2023-12-02 13:45:55,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 15.214285714285714) internal successors, (213), 15 states have internal predecessors, (213), 12 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-12-02 13:45:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 56103 states and 63622 transitions. [2023-12-02 13:45:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-12-02 13:45:55,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:45:55,885 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 19, 19, 19, 19, 19, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:45:55,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-12-02 13:45:56,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-12-02 13:45:56,086 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:45:56,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:45:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1935399169, now seen corresponding path program 5 times [2023-12-02 13:45:56,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:45:56,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358224618] [2023-12-02 13:45:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:45:56,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:45:56,100 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:45:56,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684812460] [2023-12-02 13:45:56,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:45:56,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:45:56,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:45:56,101 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:45:56,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-12-02 13:45:56,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-02 13:45:56,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:45:56,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 13:45:56,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:45:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4344 backedges. 0 proven. 2917 refuted. 0 times theorem prover too weak. 1427 trivial. 0 not checked. [2023-12-02 13:45:56,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:45:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4344 backedges. 0 proven. 2917 refuted. 0 times theorem prover too weak. 1427 trivial. 0 not checked. [2023-12-02 13:45:57,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:45:57,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358224618] [2023-12-02 13:45:57,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:45:57,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684812460] [2023-12-02 13:45:57,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684812460] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:45:57,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553663604] [2023-12-02 13:45:57,734 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-12-02 13:45:57,734 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:45:57,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:45:57,734 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:45:57,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:45:58,536 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:45:58,544 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:45:58,564 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:46:04,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1870901#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (<= |ULTIMATE.start_main_~y2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 4611686014132420609)) (<= 21 ~counter~0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= ~counter~0 2147483647) (<= 0 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483648 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)))' at error location [2023-12-02 13:46:04,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:46:04,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:46:04,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-12-02 13:46:04,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024754932] [2023-12-02 13:46:04,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:46:04,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 13:46:04,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:46:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 13:46:04,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 13:46:04,818 INFO L87 Difference]: Start difference. First operand 56103 states and 63622 transitions. Second operand has 28 states, 27 states have (on average 15.666666666666666) internal successors, (423), 28 states have internal predecessors, (423), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 13:46:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:46:18,076 INFO L93 Difference]: Finished difference Result 61273 states and 69221 transitions. [2023-12-02 13:46:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-12-02 13:46:18,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 15.666666666666666) internal successors, (423), 28 states have internal predecessors, (423), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 455 [2023-12-02 13:46:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:46:18,139 INFO L225 Difference]: With dead ends: 61273 [2023-12-02 13:46:18,139 INFO L226 Difference]: Without dead ends: 61237 [2023-12-02 13:46:18,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1456 GetRequests, 1267 SyntacticMatches, 43 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8644 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=3308, Invalid=18448, Unknown=0, NotChecked=0, Total=21756 [2023-12-02 13:46:18,149 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1294 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 4111 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 4378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 4111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:46:18,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 1882 Invalid, 4378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 4111 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-12-02 13:46:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61237 states. [2023-12-02 13:46:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61237 to 59861. [2023-12-02 13:46:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59861 states, 56746 states have (on average 1.084129277834561) internal successors, (61520), 56755 states have internal predecessors, (61520), 3088 states have call successors, (3088), 21 states have call predecessors, (3088), 21 states have return successors, (3088), 3084 states have call predecessors, (3088), 3088 states have call successors, (3088) [2023-12-02 13:46:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59861 states to 59861 states and 67696 transitions. [2023-12-02 13:46:23,518 INFO L78 Accepts]: Start accepts. Automaton has 59861 states and 67696 transitions. Word has length 455 [2023-12-02 13:46:23,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:46:23,518 INFO L495 AbstractCegarLoop]: Abstraction has 59861 states and 67696 transitions. [2023-12-02 13:46:23,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 15.666666666666666) internal successors, (423), 28 states have internal predecessors, (423), 23 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2023-12-02 13:46:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 59861 states and 67696 transitions. [2023-12-02 13:46:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2023-12-02 13:46:23,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:46:23,526 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:46:23,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-12-02 13:46:23,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:46:23,727 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-12-02 13:46:23,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:46:23,727 INFO L85 PathProgramCache]: Analyzing trace with hash -812291510, now seen corresponding path program 4 times [2023-12-02 13:46:23,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:46:23,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435969030] [2023-12-02 13:46:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:46:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:46:23,743 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:46:23,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082565902] [2023-12-02 13:46:23,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:46:23,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:46:23,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:46:23,745 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:46:23,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-12-02 13:46:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:46:23,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 13:46:23,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:46:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5205 backedges. 5138 proven. 20 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 13:46:24,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:46:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5205 backedges. 4638 proven. 20 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2023-12-02 13:46:25,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:46:25,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435969030] [2023-12-02 13:46:25,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:46:25,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082565902] [2023-12-02 13:46:25,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082565902] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:46:25,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299738898] [2023-12-02 13:46:25,518 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:46:25,518 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:46:25,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:46:25,518 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:46:25,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:46:26,299 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 13:46:26,305 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-12-02 13:46:26,324 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:46:31,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2007902#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 1 ~counter~0) (not (= |ULTIMATE.start_main_~y3~0#1| 0)) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (= (+ 2147483647 |ULTIMATE.start_main_~y3~0#1|) |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 13:46:31,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:46:31,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:46:31,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 44 [2023-12-02 13:46:31,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807571779] [2023-12-02 13:46:31,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:46:31,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-02 13:46:31,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:46:31,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-02 13:46:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=3528, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 13:46:31,259 INFO L87 Difference]: Start difference. First operand 59861 states and 67696 transitions. Second operand has 44 states, 44 states have (on average 9.295454545454545) internal successors, (409), 44 states have internal predecessors, (409), 22 states have call successors, (46), 23 states have call predecessors, (46), 23 states have return successors, (46), 22 states have call predecessors, (46), 22 states have call successors, (46) [2023-12-02 13:46:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:46:33,296 INFO L93 Difference]: Finished difference Result 59995 states and 67833 transitions. [2023-12-02 13:46:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-02 13:46:33,297 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 9.295454545454545) internal successors, (409), 44 states have internal predecessors, (409), 22 states have call successors, (46), 23 states have call predecessors, (46), 23 states have return successors, (46), 22 states have call predecessors, (46), 22 states have call successors, (46) Word has length 486 [2023-12-02 13:46:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:46:33,298 INFO L225 Difference]: With dead ends: 59995 [2023-12-02 13:46:33,298 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 13:46:33,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1497 GetRequests, 1329 SyntacticMatches, 64 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5211 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2439, Invalid=8691, Unknown=0, NotChecked=0, Total=11130 [2023-12-02 13:46:33,323 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 167 mSDsluCounter, 2011 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:46:33,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 2436 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:46:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 13:46:33,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 13:46:33,324 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) [2023-12-02 13:46:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 13:46:33,326 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 486 [2023-12-02 13:46:33,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:46:33,327 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 13:46:33,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 9.295454545454545) internal successors, (409), 44 states have internal predecessors, (409), 22 states have call successors, (46), 23 states have call predecessors, (46), 23 states have return successors, (46), 22 states have call predecessors, (46), 22 states have call successors, (46) [2023-12-02 13:46:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 13:46:33,327 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 13:46:33,330 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 22 remaining) [2023-12-02 13:46:33,330 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 22 remaining) [2023-12-02 13:46:33,330 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 22 remaining) [2023-12-02 13:46:33,330 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 22 remaining) [2023-12-02 13:46:33,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 22 remaining) [2023-12-02 13:46:33,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 22 remaining) [2023-12-02 13:46:33,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 22 remaining) [2023-12-02 13:46:33,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 22 remaining) [2023-12-02 13:46:33,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 22 remaining) [2023-12-02 13:46:33,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 22 remaining) [2023-12-02 13:46:33,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 22 remaining) [2023-12-02 13:46:33,331 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 22 remaining) [2023-12-02 13:46:33,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 22 remaining) [2023-12-02 13:46:33,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 22 remaining) [2023-12-02 13:46:33,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 22 remaining) [2023-12-02 13:46:33,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 22 remaining) [2023-12-02 13:46:33,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 22 remaining) [2023-12-02 13:46:33,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 22 remaining) [2023-12-02 13:46:33,332 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 22 remaining) [2023-12-02 13:46:33,333 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 22 remaining) [2023-12-02 13:46:33,333 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 22 remaining) [2023-12-02 13:46:33,333 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 22 remaining) [2023-12-02 13:46:33,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-12-02 13:46:33,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7199a8-cdc8-4ab6-b430-3d7b26f7b86d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-12-02 13:46:33,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.