./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound50.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_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/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_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/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_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/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 4f0dc25e497896e48962fc4f59a3ea4856b5eb0408b9845e68b04a0b0a132067 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:18:08,883 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:18:08,972 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 17:18:08,976 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:18:08,977 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:18:09,001 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:18:09,002 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:18:09,003 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:18:09,003 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:18:09,004 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:18:09,004 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:18:09,005 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:18:09,005 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:18:09,006 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:18:09,006 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:18:09,007 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:18:09,007 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:18:09,008 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:18:09,008 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:18:09,009 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:18:09,009 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:18:09,010 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:18:09,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:18:09,011 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:18:09,011 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:18:09,011 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:18:09,012 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:18:09,012 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:18:09,012 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:18:09,013 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:18:09,013 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:18:09,013 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 17:18:09,014 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 17:18:09,014 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:18:09,014 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:18:09,014 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:18:09,014 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:18:09,015 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:18:09,015 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:18:09,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:18:09,015 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:18:09,016 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:18:09,016 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:18:09,016 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:18:09,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:18:09,016 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:18:09,016 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:18:09,017 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:18:09,017 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:18:09,017 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_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f0dc25e497896e48962fc4f59a3ea4856b5eb0408b9845e68b04a0b0a132067 [2023-12-02 17:18:09,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:18:09,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:18:09,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:18:09,274 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:18:09,275 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:18:09,276 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound50.c [2023-12-02 17:18:12,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:18:12,233 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:18:12,233 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/sv-benchmarks/c/nla-digbench-scaling/mannadiv_valuebound50.c [2023-12-02 17:18:12,241 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/data/4c6fdd109/8fd9b7a692fa4279b1e86cce5c881ea5/FLAG5ccc9631a [2023-12-02 17:18:12,255 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/data/4c6fdd109/8fd9b7a692fa4279b1e86cce5c881ea5 [2023-12-02 17:18:12,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:18:12,259 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:18:12,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:18:12,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:18:12,266 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:18:12,267 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1497860c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12, skipping insertion in model container [2023-12-02 17:18:12,269 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,293 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:18:12,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:18:12,497 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:18:12,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:18:12,525 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:18:12,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12 WrapperNode [2023-12-02 17:18:12,525 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:18:12,526 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:18:12,527 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:18:12,527 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:18:12,533 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,558 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-12-02 17:18:12,558 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:18:12,559 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:18:12,559 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:18:12,559 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:18:12,567 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,569 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,570 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,577 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,578 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,579 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:18:12,582 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:18:12,583 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:18:12,583 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:18:12,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (1/1) ... [2023-12-02 17:18:12,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:18:12,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:12,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:18:12,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:18:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:18:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:18:12,657 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:18:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:18:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:18:12,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:18:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 17:18:12,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 17:18:12,721 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:18:12,723 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:18:12,911 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:18:12,947 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:18:12,948 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 17:18:12,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:18:12 BoogieIcfgContainer [2023-12-02 17:18:12,950 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:18:12,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:18:12,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:18:12,957 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:18:12,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:18:12" (1/3) ... [2023-12-02 17:18:12,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e415a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:18:12, skipping insertion in model container [2023-12-02 17:18:12,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:18:12" (2/3) ... [2023-12-02 17:18:12,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e415a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:18:12, skipping insertion in model container [2023-12-02 17:18:12,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:18:12" (3/3) ... [2023-12-02 17:18:12,960 INFO L112 eAbstractionObserver]: Analyzing ICFG mannadiv_valuebound50.c [2023-12-02 17:18:12,982 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:18:12,982 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-12-02 17:18:13,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:18:13,037 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;@2d6be4e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:18:13,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-12-02 17:18:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 48 states have internal predecessors, (51), 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 17:18:13,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 17:18:13,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:13,050 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:18:13,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:13,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash 885391590, now seen corresponding path program 1 times [2023-12-02 17:18:13,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:13,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921450894] [2023-12-02 17:18:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:13,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:13,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:13,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921450894] [2023-12-02 17:18:13,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 17:18:13,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260446528] [2023-12-02 17:18:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:13,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:13,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:13,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:13,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:18:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:13,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 17:18:13,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:13,282 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 17:18:13,282 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:18:13,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260446528] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:18:13,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:18:13,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:18:13,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034422408] [2023-12-02 17:18:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:18:13,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 17:18:13,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 17:18:13,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:18:13,323 INFO L87 Difference]: Start difference. First operand has 55 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 48 states have internal predecessors, (51), 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 17:18:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:13,349 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2023-12-02 17:18:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 17:18:13,351 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 17:18:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:13,357 INFO L225 Difference]: With dead ends: 68 [2023-12-02 17:18:13,357 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 17:18:13,359 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 17:18:13,362 INFO L413 NwaCegarLoop]: 54 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, 54 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 17:18:13,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:18:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 17:18:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-12-02 17:18:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 46 states have internal predecessors, (48), 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 17:18:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2023-12-02 17:18:13,398 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 10 [2023-12-02 17:18:13,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:13,399 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2023-12-02 17:18:13,399 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 17:18:13,400 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2023-12-02 17:18:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 17:18:13,401 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:13,401 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:18:13,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:18:13,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 17:18:13,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:13,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:13,603 INFO L85 PathProgramCache]: Analyzing trace with hash 885388443, now seen corresponding path program 1 times [2023-12-02 17:18:13,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:13,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018670003] [2023-12-02 17:18:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:13,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:13,614 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:13,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539007489] [2023-12-02 17:18:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:13,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:13,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:13,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:13,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:18:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:13,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:18:13,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:13,794 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 17:18:13,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:18:13,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018670003] [2023-12-02 17:18:13,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:13,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539007489] [2023-12-02 17:18:13,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539007489] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:18:13,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:18:13,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:18:13,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008606886] [2023-12-02 17:18:13,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:18:13,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:18:13,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:13,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:18:13,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:18:13,799 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 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 17:18:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:13,943 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2023-12-02 17:18:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:18:13,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 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 10 [2023-12-02 17:18:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:13,945 INFO L225 Difference]: With dead ends: 92 [2023-12-02 17:18:13,946 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 17:18:13,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 17:18:13,948 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 186 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:13,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 72 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:18:13,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 17:18:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2023-12-02 17:18:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 65 states have internal predecessors, (79), 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 17:18:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2023-12-02 17:18:13,962 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 10 [2023-12-02 17:18:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:13,963 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2023-12-02 17:18:13,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 2.0) internal successors, (6), 5 states have internal predecessors, (6), 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 17:18:13,963 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2023-12-02 17:18:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 17:18:13,964 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:13,964 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:18:13,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:18:14,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:14,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:14,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:14,170 INFO L85 PathProgramCache]: Analyzing trace with hash 454770653, now seen corresponding path program 1 times [2023-12-02 17:18:14,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:14,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662789890] [2023-12-02 17:18:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:14,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:14,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:14,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239386690] [2023-12-02 17:18:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:14,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:14,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:14,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:14,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:18:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:14,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:18:14,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:14,252 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 17:18:14,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:18:14,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:14,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662789890] [2023-12-02 17:18:14,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:14,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239386690] [2023-12-02 17:18:14,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239386690] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:18:14,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:18:14,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:18:14,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120934093] [2023-12-02 17:18:14,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:18:14,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:18:14,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:14,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:18:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:18:14,255 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 17:18:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:14,319 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2023-12-02 17:18:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:18:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 12 [2023-12-02 17:18:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:14,320 INFO L225 Difference]: With dead ends: 75 [2023-12-02 17:18:14,320 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 17:18:14,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 17:18:14,322 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:14,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 29 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:18:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 17:18:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 17:18:14,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 62 states have internal predecessors, (73), 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 17:18:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2023-12-02 17:18:14,335 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 12 [2023-12-02 17:18:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:14,335 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2023-12-02 17:18:14,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 17:18:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2023-12-02 17:18:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 17:18:14,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:14,336 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:18:14,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:18:14,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:14,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:14,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:14,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1212988407, now seen corresponding path program 1 times [2023-12-02 17:18:14,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:14,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410847684] [2023-12-02 17:18:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:14,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:14,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:14,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796113418] [2023-12-02 17:18:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:14,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:14,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:14,557 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:14,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:18:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:14,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:18:14,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:14,629 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 17:18:14,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:18:14,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410847684] [2023-12-02 17:18:14,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796113418] [2023-12-02 17:18:14,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796113418] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:18:14,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:18:14,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:18:14,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333575773] [2023-12-02 17:18:14,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:18:14,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:18:14,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:14,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:18:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:18:14,632 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 17:18:14,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:14,721 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-12-02 17:18:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:18:14,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 13 [2023-12-02 17:18:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:14,723 INFO L225 Difference]: With dead ends: 115 [2023-12-02 17:18:14,723 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 17:18:14,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 17:18:14,725 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:14,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:18:14,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 17:18:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2023-12-02 17:18:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 86 states have internal predecessors, (104), 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 17:18:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2023-12-02 17:18:14,741 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 13 [2023-12-02 17:18:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:14,742 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2023-12-02 17:18:14,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 17:18:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2023-12-02 17:18:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 17:18:14,742 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:14,743 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:18:14,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:18:14,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:14,946 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:14,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:14,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1052064993, now seen corresponding path program 1 times [2023-12-02 17:18:14,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:14,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065735887] [2023-12-02 17:18:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:14,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:14,958 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:14,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649028028] [2023-12-02 17:18:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:14,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:14,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:14,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:14,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:18:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:14,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:18:14,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:15,075 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 17:18:15,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:15,233 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 17:18:15,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065735887] [2023-12-02 17:18:15,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649028028] [2023-12-02 17:18:15,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649028028] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1084660342] [2023-12-02 17:18:15,254 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 17:18:15,254 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:15,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:15,263 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:15,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:15,723 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:15,789 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:16,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1084660342] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:18:16,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:16,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2023-12-02 17:18:16,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139813155] [2023-12-02 17:18:16,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:18:16,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:18:16,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:16,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:18:16,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:18:16,375 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 8 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 17:18:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:16,642 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2023-12-02 17:18:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:18:16,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 14 [2023-12-02 17:18:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:16,644 INFO L225 Difference]: With dead ends: 99 [2023-12-02 17:18:16,644 INFO L226 Difference]: Without dead ends: 97 [2023-12-02 17:18:16,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:18:16,645 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 132 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:16,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:18:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-02 17:18:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2023-12-02 17:18:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 86 states have internal predecessors, (102), 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 17:18:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2023-12-02 17:18:16,661 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 14 [2023-12-02 17:18:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:16,662 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2023-12-02 17:18:16,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 17:18:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2023-12-02 17:18:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 17:18:16,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:16,663 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] [2023-12-02 17:18:16,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:18:16,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:16,864 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:16,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1837019302, now seen corresponding path program 1 times [2023-12-02 17:18:16,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:16,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763386838] [2023-12-02 17:18:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:16,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:16,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359019814] [2023-12-02 17:18:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:16,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:16,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:16,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:16,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:18:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:16,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:18:16,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:16,966 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 17:18:16,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:17,025 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 17:18:17,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:17,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763386838] [2023-12-02 17:18:17,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:17,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359019814] [2023-12-02 17:18:17,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359019814] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:17,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638287231] [2023-12-02 17:18:17,028 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 17:18:17,029 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:17,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:17,029 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:17,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:17,308 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-12-02 17:18:17,316 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:17,358 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:18,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [638287231] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:18:18,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:18,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 17 [2023-12-02 17:18:18,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658152876] [2023-12-02 17:18:18,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:18:18,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:18:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:18,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:18:18,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:18:18,350 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 17:18:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:18,707 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2023-12-02 17:18:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 17:18:18,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 25 [2023-12-02 17:18:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:18,709 INFO L225 Difference]: With dead ends: 103 [2023-12-02 17:18:18,709 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 17:18:18,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:18:18,710 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:18,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 43 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:18:18,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 17:18:18,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-12-02 17:18:18,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.4) internal successors, (105), 89 states have internal predecessors, (105), 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 17:18:18,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2023-12-02 17:18:18,726 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 25 [2023-12-02 17:18:18,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:18,726 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2023-12-02 17:18:18,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 17:18:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2023-12-02 17:18:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 17:18:18,727 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:18,728 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] [2023-12-02 17:18:18,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:18:18,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:18,930 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:18,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1836711462, now seen corresponding path program 1 times [2023-12-02 17:18:18,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:18,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564946462] [2023-12-02 17:18:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:18,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:18,943 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:18,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260683282] [2023-12-02 17:18:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:18,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:18,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:18,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:18,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:18:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:18,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:18:18,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:19,019 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 17:18:19,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:19,077 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 17:18:19,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:19,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564946462] [2023-12-02 17:18:19,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:19,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260683282] [2023-12-02 17:18:19,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260683282] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:19,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1563176178] [2023-12-02 17:18:19,081 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 17:18:19,081 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:19,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:19,082 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:19,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:19,382 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-12-02 17:18:19,389 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:19,419 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:20,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1563176178] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:18:20,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:20,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 17 [2023-12-02 17:18:20,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055051080] [2023-12-02 17:18:20,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:18:20,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:18:20,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:20,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:18:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:18:20,215 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 17:18:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:20,552 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2023-12-02 17:18:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 17:18:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 25 [2023-12-02 17:18:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:20,553 INFO L225 Difference]: With dead ends: 105 [2023-12-02 17:18:20,553 INFO L226 Difference]: Without dead ends: 103 [2023-12-02 17:18:20,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:18:20,554 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:20,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 54 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:18:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-02 17:18:20,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-12-02 17:18:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.379746835443038) internal successors, (109), 93 states have internal predecessors, (109), 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 17:18:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2023-12-02 17:18:20,568 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 25 [2023-12-02 17:18:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:20,568 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2023-12-02 17:18:20,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 17:18:20,568 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2023-12-02 17:18:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:18:20,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:20,569 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] [2023-12-02 17:18:20,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:18:20,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:20,774 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:20,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash -412111191, now seen corresponding path program 1 times [2023-12-02 17:18:20,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:20,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540974172] [2023-12-02 17:18:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:20,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:20,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148518037] [2023-12-02 17:18:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:20,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:20,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:20,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:20,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:18:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:20,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:18:20,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:18:20,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:21,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:21,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540974172] [2023-12-02 17:18:21,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:21,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148518037] [2023-12-02 17:18:21,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148518037] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:18:21,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638171588] [2023-12-02 17:18:21,063 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:18:21,063 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:21,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:21,064 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:21,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:21,963 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:18:21,977 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:22,005 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:23,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2127#(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_~y2~0#1| 0) (<= (+ 2147483649 (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|)) 0) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 17:18:23,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:23,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:18:23,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 17:18:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070741388] [2023-12-02 17:18:23,141 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:23,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:18:23,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:18:23,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:18:23,142 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 17:18:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:23,249 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2023-12-02 17:18:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:18:23,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 28 [2023-12-02 17:18:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:23,250 INFO L225 Difference]: With dead ends: 113 [2023-12-02 17:18:23,250 INFO L226 Difference]: Without dead ends: 111 [2023-12-02 17:18:23,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:18:23,251 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:23,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 57 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:18:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-02 17:18:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2023-12-02 17:18:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 91 states have internal predecessors, (107), 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 17:18:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2023-12-02 17:18:23,259 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 28 [2023-12-02 17:18:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:23,260 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2023-12-02 17:18:23,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 17:18:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2023-12-02 17:18:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 17:18:23,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:23,261 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] [2023-12-02 17:18:23,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:18:23,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:23,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:23,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash 109455015, now seen corresponding path program 1 times [2023-12-02 17:18:23,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:23,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242894590] [2023-12-02 17:18:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:23,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:23,470 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:23,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122076657] [2023-12-02 17:18:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:23,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:23,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:23,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:23,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:18:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:23,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:18:23,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:23,601 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 17:18:23,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:23,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:23,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242894590] [2023-12-02 17:18:23,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:23,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122076657] [2023-12-02 17:18:23,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122076657] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:18:23,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79272371] [2023-12-02 17:18:23,718 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:18:23,718 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:23,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:23,719 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:23,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:24,569 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:18:24,580 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:24,603 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:26,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2519#(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| 0) (<= 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 17:18:26,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:26,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:18:26,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 17:18:26,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120812971] [2023-12-02 17:18:26,781 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:26,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:18:26,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:26,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:18:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:18:26,783 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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 17:18:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:26,902 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2023-12-02 17:18:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:18:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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 29 [2023-12-02 17:18:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:26,903 INFO L225 Difference]: With dead ends: 162 [2023-12-02 17:18:26,904 INFO L226 Difference]: Without dead ends: 159 [2023-12-02 17:18:26,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2023-12-02 17:18:26,905 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:26,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 89 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:18:26,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-02 17:18:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 135. [2023-12-02 17:18:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 111 states have (on average 1.3783783783783783) internal successors, (153), 123 states have internal predecessors, (153), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 17:18:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2023-12-02 17:18:26,915 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 29 [2023-12-02 17:18:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:26,915 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2023-12-02 17:18:26,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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 17:18:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2023-12-02 17:18:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 17:18:26,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:26,916 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] [2023-12-02 17:18:26,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 17:18:27,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:27,117 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:27,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash 66873311, now seen corresponding path program 1 times [2023-12-02 17:18:27,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:27,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672150215] [2023-12-02 17:18:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:27,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:27,124 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:27,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154430918] [2023-12-02 17:18:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:27,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:27,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:27,126 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:27,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 17:18:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:27,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:18:27,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:18:27,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:18:27,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:27,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672150215] [2023-12-02 17:18:27,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:27,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154430918] [2023-12-02 17:18:27,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154430918] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:27,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1474497730] [2023-12-02 17:18:27,309 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:18:27,309 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:27,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:27,310 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:27,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:28,155 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 17:18:28,162 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:28,185 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:29,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1474497730] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:18:29,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:29,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7, 7] total 24 [2023-12-02 17:18:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084374262] [2023-12-02 17:18:29,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:18:29,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:18:29,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:18:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:18:29,086 INFO L87 Difference]: Start difference. First operand 135 states and 169 transitions. Second operand has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 17:18:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:30,443 INFO L93 Difference]: Finished difference Result 147 states and 173 transitions. [2023-12-02 17:18:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:18:30,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 31 [2023-12-02 17:18:30,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:30,444 INFO L225 Difference]: With dead ends: 147 [2023-12-02 17:18:30,445 INFO L226 Difference]: Without dead ends: 137 [2023-12-02 17:18:30,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:18:30,446 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 169 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:30,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 64 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:18:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-02 17:18:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2023-12-02 17:18:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 107 states have (on average 1.3364485981308412) internal successors, (143), 119 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 17:18:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 159 transitions. [2023-12-02 17:18:30,460 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 159 transitions. Word has length 31 [2023-12-02 17:18:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:30,461 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 159 transitions. [2023-12-02 17:18:30,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 17:18:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 159 transitions. [2023-12-02 17:18:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 17:18:30,462 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:30,462 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] [2023-12-02 17:18:30,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 17:18:30,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:18:30,662 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:30,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:30,663 INFO L85 PathProgramCache]: Analyzing trace with hash 894223917, now seen corresponding path program 1 times [2023-12-02 17:18:30,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:30,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001978845] [2023-12-02 17:18:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:30,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:30,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:30,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329269401] [2023-12-02 17:18:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:30,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:30,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:30,673 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:30,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 17:18:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:30,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 17:18:30,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:18:30,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:18:30,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001978845] [2023-12-02 17:18:30,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329269401] [2023-12-02 17:18:30,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329269401] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343116686] [2023-12-02 17:18:30,961 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:18:30,961 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:30,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:30,962 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:30,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:31,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:18:31,872 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:31,889 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:33,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3604#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~y3~0#1| 2147483648)) (<= 1 |#StackHeapBarrier|) (= |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) (<= 0 (+ (* |ULTIMATE.start_main_~x2~0#1| |ULTIMATE.start_main_~y1~0#1|) 2147483648)) (<= 0 |ULTIMATE.start_main_~y1~0#1|) (<= |ULTIMATE.start_main_~y1~0#1| 2147483647) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 17:18:33,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:33,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:33,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-12-02 17:18:33,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863281514] [2023-12-02 17:18:33,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:33,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:18:33,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:33,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:18:33,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:18:33,414 INFO L87 Difference]: Start difference. First operand 131 states and 159 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 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 17:18:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:33,580 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2023-12-02 17:18:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:18:33,581 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 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 32 [2023-12-02 17:18:33,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:33,581 INFO L225 Difference]: With dead ends: 131 [2023-12-02 17:18:33,581 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 17:18:33,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:18:33,583 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 133 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:33,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 29 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:18:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 17:18:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-12-02 17:18:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 107 states have (on average 1.2616822429906542) internal successors, (135), 116 states have internal predecessors, (135), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 17:18:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 151 transitions. [2023-12-02 17:18:33,593 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 151 transitions. Word has length 32 [2023-12-02 17:18:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:33,593 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 151 transitions. [2023-12-02 17:18:33,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 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 17:18:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 151 transitions. [2023-12-02 17:18:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 17:18:33,595 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:33,595 INFO L195 NwaCegarLoop]: trace histogram [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 17:18:33,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 17:18:33,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:33,795 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:33,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:33,796 INFO L85 PathProgramCache]: Analyzing trace with hash -159255839, now seen corresponding path program 1 times [2023-12-02 17:18:33,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:33,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181684433] [2023-12-02 17:18:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:33,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:33,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:33,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675808865] [2023-12-02 17:18:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:33,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:33,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:33,804 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:33,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 17:18:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:33,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:18:33,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:18:33,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:18:33,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181684433] [2023-12-02 17:18:33,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675808865] [2023-12-02 17:18:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675808865] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:18:33,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:18:33,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:18:33,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982343086] [2023-12-02 17:18:33,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:18:33,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:18:33,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:33,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:18:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:18:33,874 INFO L87 Difference]: Start difference. First operand 128 states and 151 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 17:18:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:34,010 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2023-12-02 17:18:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:18:34,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 33 [2023-12-02 17:18:34,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:34,012 INFO L225 Difference]: With dead ends: 130 [2023-12-02 17:18:34,012 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 17:18:34,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 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 17:18:34,013 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:34,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:18:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 17:18:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2023-12-02 17:18:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 107 states have (on average 1.233644859813084) internal successors, (132), 116 states have internal predecessors, (132), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 17:18:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2023-12-02 17:18:34,028 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 33 [2023-12-02 17:18:34,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:34,028 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2023-12-02 17:18:34,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 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 17:18:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2023-12-02 17:18:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 17:18:34,029 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:34,029 INFO L195 NwaCegarLoop]: trace histogram [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 17:18:34,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 17:18:34,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:34,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:34,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:34,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1951137707, now seen corresponding path program 1 times [2023-12-02 17:18:34,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:34,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311300851] [2023-12-02 17:18:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:34,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:34,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:34,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781122079] [2023-12-02 17:18:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:34,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:34,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:34,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 17:18:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:34,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:18:34,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:18:34,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:18:34,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:34,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311300851] [2023-12-02 17:18:34,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:34,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781122079] [2023-12-02 17:18:34,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781122079] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:34,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892489505] [2023-12-02 17:18:34,486 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:18:34,487 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:34,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:34,487 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:34,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:35,095 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:18:35,104 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:35,126 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:36,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4519#(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|)) (<= (* |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 17:18:36,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:36,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:36,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-02 17:18:36,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843117866] [2023-12-02 17:18:36,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:36,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:18:36,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:36,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:18:36,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:18:36,798 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 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 17:18:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:37,201 INFO L93 Difference]: Finished difference Result 171 states and 196 transitions. [2023-12-02 17:18:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:18:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 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 33 [2023-12-02 17:18:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:37,203 INFO L225 Difference]: With dead ends: 171 [2023-12-02 17:18:37,203 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 17:18:37,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:18:37,204 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 169 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:37,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 46 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:18:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 17:18:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2023-12-02 17:18:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 115 states have internal predecessors, (130), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 17:18:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2023-12-02 17:18:37,216 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 33 [2023-12-02 17:18:37,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:37,216 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2023-12-02 17:18:37,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 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 17:18:37,216 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2023-12-02 17:18:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 17:18:37,217 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:37,217 INFO L195 NwaCegarLoop]: trace histogram [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 17:18:37,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 17:18:37,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:37,422 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:37,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:37,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1479578058, now seen corresponding path program 1 times [2023-12-02 17:18:37,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:37,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526026844] [2023-12-02 17:18:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:37,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:37,430 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:37,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201483247] [2023-12-02 17:18:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:37,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:37,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:37,432 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:37,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 17:18:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:37,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:18:37,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:18:37,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:18:37,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:37,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526026844] [2023-12-02 17:18:37,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:37,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201483247] [2023-12-02 17:18:37,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201483247] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:37,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346262504] [2023-12-02 17:18:37,531 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:18:37,531 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:37,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:37,532 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:37,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:38,177 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 17:18:38,183 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:38,201 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:39,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5126#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 17:18:39,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:39,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:39,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 17:18:39,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009155770] [2023-12-02 17:18:39,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:39,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:18:39,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:39,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:18:39,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-12-02 17:18:39,083 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 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 17:18:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:39,172 INFO L93 Difference]: Finished difference Result 318 states and 372 transitions. [2023-12-02 17:18:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:18:39,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 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 39 [2023-12-02 17:18:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:39,174 INFO L225 Difference]: With dead ends: 318 [2023-12-02 17:18:39,174 INFO L226 Difference]: Without dead ends: 316 [2023-12-02 17:18:39,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-12-02 17:18:39,175 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 91 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 17:18:39,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 91 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:18:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-12-02 17:18:39,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 263. [2023-12-02 17:18:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 235 states have (on average 1.2042553191489362) internal successors, (283), 242 states have internal predecessors, (283), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 17:18:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 317 transitions. [2023-12-02 17:18:39,199 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 317 transitions. Word has length 39 [2023-12-02 17:18:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:39,199 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 317 transitions. [2023-12-02 17:18:39,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 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 17:18:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 317 transitions. [2023-12-02 17:18:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 17:18:39,200 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:39,200 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-12-02 17:18:39,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 17:18:39,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 17:18:39,401 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:39,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash 287486975, now seen corresponding path program 1 times [2023-12-02 17:18:39,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:39,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411289843] [2023-12-02 17:18:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:39,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:39,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952132412] [2023-12-02 17:18:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:39,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:39,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:39,411 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:39,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 17:18:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:39,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:18:39,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:18:39,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:18:39,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:39,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411289843] [2023-12-02 17:18:39,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:39,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952132412] [2023-12-02 17:18:39,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952132412] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:18:39,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:18:39,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:18:39,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787252396] [2023-12-02 17:18:39,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:18:39,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:18:39,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:39,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:18:39,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:18:39,476 INFO L87 Difference]: Start difference. First operand 263 states and 317 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 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 17:18:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:39,515 INFO L93 Difference]: Finished difference Result 263 states and 317 transitions. [2023-12-02 17:18:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:18:39,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 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 44 [2023-12-02 17:18:39,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:39,517 INFO L225 Difference]: With dead ends: 263 [2023-12-02 17:18:39,517 INFO L226 Difference]: Without dead ends: 261 [2023-12-02 17:18:39,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 17:18:39,518 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 71 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 17:18:39,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 71 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:18:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-12-02 17:18:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2023-12-02 17:18:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 231 states have (on average 1.1645021645021645) internal successors, (269), 236 states have internal predecessors, (269), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-02 17:18:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 303 transitions. [2023-12-02 17:18:39,537 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 303 transitions. Word has length 44 [2023-12-02 17:18:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:39,537 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 303 transitions. [2023-12-02 17:18:39,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 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 17:18:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 303 transitions. [2023-12-02 17:18:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 17:18:39,538 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:39,538 INFO L195 NwaCegarLoop]: trace histogram [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 17:18:39,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 17:18:39,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 17:18:39,739 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:39,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash -640162343, now seen corresponding path program 2 times [2023-12-02 17:18:39,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:39,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985903273] [2023-12-02 17:18:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:39,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:39,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:39,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769437758] [2023-12-02 17:18:39,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:18:39,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:39,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:39,747 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:39,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 17:18:40,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:18:40,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:18:40,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:18:40,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:18:40,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:40,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:40,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985903273] [2023-12-02 17:18:40,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:40,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769437758] [2023-12-02 17:18:40,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769437758] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:18:40,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378675602] [2023-12-02 17:18:40,229 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:18:40,229 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:40,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:40,230 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:40,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:40,838 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:18:40,847 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:40,865 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:43,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6699#(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| 0) (<= 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 17:18:43,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:43,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:18:43,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-12-02 17:18:43,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131845417] [2023-12-02 17:18:43,040 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:43,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:18:43,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:43,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:18:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:18:43,041 INFO L87 Difference]: Start difference. First operand 257 states and 303 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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 17:18:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:43,198 INFO L93 Difference]: Finished difference Result 520 states and 623 transitions. [2023-12-02 17:18:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:18:43,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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 47 [2023-12-02 17:18:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:43,201 INFO L225 Difference]: With dead ends: 520 [2023-12-02 17:18:43,201 INFO L226 Difference]: Without dead ends: 362 [2023-12-02 17:18:43,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:18:43,204 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:43,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 86 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:18:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2023-12-02 17:18:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 289. [2023-12-02 17:18:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 261 states have (on average 1.1494252873563218) internal successors, (300), 266 states have internal predecessors, (300), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 17:18:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 338 transitions. [2023-12-02 17:18:43,232 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 338 transitions. Word has length 47 [2023-12-02 17:18:43,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:43,233 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 338 transitions. [2023-12-02 17:18:43,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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 17:18:43,233 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 338 transitions. [2023-12-02 17:18:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 17:18:43,234 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:43,234 INFO L195 NwaCegarLoop]: trace histogram [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 17:18:43,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 17:18:43,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 17:18:43,434 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:43,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash 622787723, now seen corresponding path program 3 times [2023-12-02 17:18:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:43,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415196195] [2023-12-02 17:18:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:43,442 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:43,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916268803] [2023-12-02 17:18:43,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:18:43,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:43,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:43,444 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:43,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 17:18:43,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:18:43,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:18:43,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:18:43,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:18:43,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:43,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:43,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415196195] [2023-12-02 17:18:43,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:43,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916268803] [2023-12-02 17:18:43,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916268803] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:18:43,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1134378617] [2023-12-02 17:18:43,950 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:18:43,950 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:43,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:43,950 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:43,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:44,561 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:18:44,569 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:44,587 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:46,758 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7873#(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| 0) (<= 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 17:18:46,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:46,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:18:46,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 17:18:46,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255977986] [2023-12-02 17:18:46,759 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:46,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:18:46,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:18:46,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:18:46,760 INFO L87 Difference]: Start difference. First operand 289 states and 338 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 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 17:18:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:46,849 INFO L93 Difference]: Finished difference Result 472 states and 557 transitions. [2023-12-02 17:18:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:18:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 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 65 [2023-12-02 17:18:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:46,852 INFO L225 Difference]: With dead ends: 472 [2023-12-02 17:18:46,852 INFO L226 Difference]: Without dead ends: 314 [2023-12-02 17:18:46,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:18:46,854 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:46,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 69 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:18:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-12-02 17:18:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 307. [2023-12-02 17:18:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 278 states have (on average 1.1402877697841727) internal successors, (317), 283 states have internal predecessors, (317), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 17:18:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2023-12-02 17:18:46,878 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 65 [2023-12-02 17:18:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:46,878 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2023-12-02 17:18:46,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 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 17:18:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2023-12-02 17:18:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 17:18:46,879 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:46,879 INFO L195 NwaCegarLoop]: trace histogram [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 17:18:46,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-02 17:18:47,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 17:18:47,080 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:47,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:47,081 INFO L85 PathProgramCache]: Analyzing trace with hash 73988729, now seen corresponding path program 1 times [2023-12-02 17:18:47,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:47,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485241495] [2023-12-02 17:18:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:47,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:47,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:47,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423358601] [2023-12-02 17:18:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:47,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:47,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:47,091 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:47,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 17:18:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:47,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:18:47,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:18:47,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:18:47,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:47,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485241495] [2023-12-02 17:18:47,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:47,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423358601] [2023-12-02 17:18:47,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423358601] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:47,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374117671] [2023-12-02 17:18:47,379 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:18:47,379 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:47,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:47,380 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:47,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:48,196 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:18:48,219 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:48,248 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:50,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9185#(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_~y2~0#1| 2147483647) (<= (* |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) (<= 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 17:18:50,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:50,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:50,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-02 17:18:50,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104168945] [2023-12-02 17:18:50,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:50,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:18:50,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:50,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:18:50,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:18:50,264 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand has 13 states, 11 states have (on average 9.636363636363637) internal successors, (106), 13 states have internal predecessors, (106), 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 17:18:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:50,847 INFO L93 Difference]: Finished difference Result 772 states and 881 transitions. [2023-12-02 17:18:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 17:18:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.636363636363637) internal successors, (106), 13 states have internal predecessors, (106), 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 67 [2023-12-02 17:18:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:50,851 INFO L225 Difference]: With dead ends: 772 [2023-12-02 17:18:50,851 INFO L226 Difference]: Without dead ends: 754 [2023-12-02 17:18:50,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=356, Invalid=2194, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:18:50,852 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 183 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:50,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 83 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:18:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-12-02 17:18:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 581. [2023-12-02 17:18:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 539 states have (on average 1.103896103896104) internal successors, (595), 543 states have internal predecessors, (595), 34 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 17:18:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 663 transitions. [2023-12-02 17:18:50,898 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 663 transitions. Word has length 67 [2023-12-02 17:18:50,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:50,899 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 663 transitions. [2023-12-02 17:18:50,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.636363636363637) internal successors, (106), 13 states have internal predecessors, (106), 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 17:18:50,899 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 663 transitions. [2023-12-02 17:18:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 17:18:50,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:50,901 INFO L195 NwaCegarLoop]: trace histogram [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 17:18:50,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-02 17:18:51,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 17:18:51,107 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:51,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1602109679, now seen corresponding path program 1 times [2023-12-02 17:18:51,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:51,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261807645] [2023-12-02 17:18:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:51,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:51,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:51,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540037624] [2023-12-02 17:18:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:51,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:51,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:51,119 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:51,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 17:18:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:51,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:18:51,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 17:18:51,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 17:18:51,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:51,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261807645] [2023-12-02 17:18:51,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:51,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540037624] [2023-12-02 17:18:51,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540037624] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:51,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263700938] [2023-12-02 17:18:51,309 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:18:51,309 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:51,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:51,310 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:51,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:51,932 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:18:51,941 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:51,960 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:53,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11230#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 17:18:53,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:53,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:53,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-12-02 17:18:53,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702071453] [2023-12-02 17:18:53,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:53,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:18:53,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:53,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:18:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-12-02 17:18:53,529 INFO L87 Difference]: Start difference. First operand 581 states and 663 transitions. Second operand has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 10 states have internal predecessors, (121), 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 17:18:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:54,113 INFO L93 Difference]: Finished difference Result 1177 states and 1386 transitions. [2023-12-02 17:18:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:18:54,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 10 states have internal predecessors, (121), 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 78 [2023-12-02 17:18:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:54,121 INFO L225 Difference]: With dead ends: 1177 [2023-12-02 17:18:54,121 INFO L226 Difference]: Without dead ends: 1176 [2023-12-02 17:18:54,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-12-02 17:18:54,122 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:54,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 149 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:18:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2023-12-02 17:18:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1135. [2023-12-02 17:18:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1058 states have (on average 1.1550094517958411) internal successors, (1222), 1062 states have internal predecessors, (1222), 69 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-12-02 17:18:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1360 transitions. [2023-12-02 17:18:54,224 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1360 transitions. Word has length 78 [2023-12-02 17:18:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:54,224 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1360 transitions. [2023-12-02 17:18:54,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 13.444444444444445) internal successors, (121), 10 states have internal predecessors, (121), 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 17:18:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1360 transitions. [2023-12-02 17:18:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 17:18:54,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:54,226 INFO L195 NwaCegarLoop]: trace histogram [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 17:18:54,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 17:18:54,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:54,426 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:54,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash 615063849, now seen corresponding path program 1 times [2023-12-02 17:18:54,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:54,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603155237] [2023-12-02 17:18:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:54,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:54,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071612052] [2023-12-02 17:18:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:54,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:54,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:54,436 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:54,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 17:18:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:54,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:18:54,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 17:18:54,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 17:18:54,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:54,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603155237] [2023-12-02 17:18:54,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:54,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071612052] [2023-12-02 17:18:54,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071612052] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:54,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1396451745] [2023-12-02 17:18:54,867 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:18:54,868 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:54,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:54,868 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:54,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:55,809 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:18:55,820 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:18:55,838 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:58,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14355#(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) (<= 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 17:18:58,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:58,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:58,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 17:18:58,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614078455] [2023-12-02 17:18:58,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:58,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:18:58,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:18:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:18:58,103 INFO L87 Difference]: Start difference. First operand 1135 states and 1360 transitions. Second operand has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 12 states have internal predecessors, (111), 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 17:18:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:59,275 INFO L93 Difference]: Finished difference Result 1571 states and 1876 transitions. [2023-12-02 17:18:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:18:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 12 states have internal predecessors, (111), 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 83 [2023-12-02 17:18:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:59,283 INFO L225 Difference]: With dead ends: 1571 [2023-12-02 17:18:59,284 INFO L226 Difference]: Without dead ends: 1556 [2023-12-02 17:18:59,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=285, Invalid=1971, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:18:59,286 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 222 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:59,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 262 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:18:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-12-02 17:18:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1437. [2023-12-02 17:18:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1342 states have (on average 1.1013412816691506) internal successors, (1478), 1345 states have internal predecessors, (1478), 88 states have call successors, (88), 3 states have call predecessors, (88), 3 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-12-02 17:18:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 1654 transitions. [2023-12-02 17:18:59,451 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 1654 transitions. Word has length 83 [2023-12-02 17:18:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:59,451 INFO L495 AbstractCegarLoop]: Abstraction has 1437 states and 1654 transitions. [2023-12-02 17:18:59,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 12 states have internal predecessors, (111), 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 17:18:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 1654 transitions. [2023-12-02 17:18:59,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 17:18:59,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:59,453 INFO L195 NwaCegarLoop]: trace histogram [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 17:18:59,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 17:18:59,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-12-02 17:18:59,654 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:18:59,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:59,654 INFO L85 PathProgramCache]: Analyzing trace with hash 241787266, now seen corresponding path program 2 times [2023-12-02 17:18:59,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:59,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327822120] [2023-12-02 17:18:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:59,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:59,665 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:59,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729738676] [2023-12-02 17:18:59,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:18:59,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:59,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:59,666 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:59,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 17:18:59,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 17:18:59,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:18:59,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:18:59,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:18:59,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:18:59,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:59,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327822120] [2023-12-02 17:18:59,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:59,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729738676] [2023-12-02 17:18:59,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729738676] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:59,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [681864449] [2023-12-02 17:18:59,911 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:18:59,911 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:59,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:59,911 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:59,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:00,613 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 17:19:00,625 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:00,654 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:01,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18358#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 17:19:01,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:01,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:19:01,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 17:19:01,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748135411] [2023-12-02 17:19:01,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:01,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:19:01,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:01,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:19:01,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-12-02 17:19:01,669 INFO L87 Difference]: Start difference. First operand 1437 states and 1654 transitions. Second operand has 12 states, 11 states have (on average 13.181818181818182) internal successors, (145), 12 states have internal predecessors, (145), 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 17:19:02,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:02,004 INFO L93 Difference]: Finished difference Result 2987 states and 3517 transitions. [2023-12-02 17:19:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:19:02,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 13.181818181818182) internal successors, (145), 12 states have internal predecessors, (145), 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 93 [2023-12-02 17:19:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:02,018 INFO L225 Difference]: With dead ends: 2987 [2023-12-02 17:19:02,018 INFO L226 Difference]: Without dead ends: 2986 [2023-12-02 17:19:02,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 245 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-12-02 17:19:02,020 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:02,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 129 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:19:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2023-12-02 17:19:02,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2754. [2023-12-02 17:19:02,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2576 states have (on average 1.1137422360248448) internal successors, (2869), 2579 states have internal predecessors, (2869), 171 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (171), 171 states have call predecessors, (171), 171 states have call successors, (171) [2023-12-02 17:19:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 3211 transitions. [2023-12-02 17:19:02,309 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 3211 transitions. Word has length 93 [2023-12-02 17:19:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:02,310 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 3211 transitions. [2023-12-02 17:19:02,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 13.181818181818182) internal successors, (145), 12 states have internal predecessors, (145), 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 17:19:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 3211 transitions. [2023-12-02 17:19:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 17:19:02,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:19:02,313 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:19:02,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 17:19:02,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 17:19:02,514 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:19:02,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:19:02,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2018296607, now seen corresponding path program 2 times [2023-12-02 17:19:02,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:19:02,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192059887] [2023-12-02 17:19:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:19:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:19:02,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:19:02,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490933552] [2023-12-02 17:19:02,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:19:02,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:02,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:19:02,527 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:19:02,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 17:19:02,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 17:19:02,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:19:02,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:19:02,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:19:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-12-02 17:19:02,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:02,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192059887] [2023-12-02 17:19:02,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490933552] [2023-12-02 17:19:02,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490933552] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:19:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628657565] [2023-12-02 17:19:02,903 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:19:02,904 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:02,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:02,904 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:02,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:03,671 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:19:03,681 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:03,706 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:05,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25268#(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) (<= 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 17:19:05,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:05,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:19:05,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-12-02 17:19:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744902193] [2023-12-02 17:19:05,849 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:05,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:19:05,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:19:05,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:19:05,851 INFO L87 Difference]: Start difference. First operand 2754 states and 3211 transitions. Second operand has 7 states, 6 states have (on average 9.5) internal successors, (57), 7 states have internal predecessors, (57), 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 17:19:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:06,213 INFO L93 Difference]: Finished difference Result 4250 states and 4961 transitions. [2023-12-02 17:19:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:19:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.5) internal successors, (57), 7 states have internal predecessors, (57), 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 137 [2023-12-02 17:19:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:06,223 INFO L225 Difference]: With dead ends: 4250 [2023-12-02 17:19:06,223 INFO L226 Difference]: Without dead ends: 2760 [2023-12-02 17:19:06,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 247 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:19:06,226 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:06,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 124 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:19:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2023-12-02 17:19:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2570. [2023-12-02 17:19:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2403 states have (on average 1.1136079900124844) internal successors, (2676), 2406 states have internal predecessors, (2676), 160 states have call successors, (160), 3 states have call predecessors, (160), 3 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-12-02 17:19:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 2996 transitions. [2023-12-02 17:19:06,552 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 2996 transitions. Word has length 137 [2023-12-02 17:19:06,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:06,552 INFO L495 AbstractCegarLoop]: Abstraction has 2570 states and 2996 transitions. [2023-12-02 17:19:06,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.5) internal successors, (57), 7 states have internal predecessors, (57), 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 17:19:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 2996 transitions. [2023-12-02 17:19:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 17:19:06,555 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:19:06,555 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:19:06,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 17:19:06,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 17:19:06,756 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:19:06,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:19:06,756 INFO L85 PathProgramCache]: Analyzing trace with hash -40729429, now seen corresponding path program 3 times [2023-12-02 17:19:06,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:19:06,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448834085] [2023-12-02 17:19:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:19:06,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:19:06,764 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:19:06,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627107475] [2023-12-02 17:19:06,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:19:06,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:06,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:19:06,765 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:19:06,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 17:19:06,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:19:06,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:19:06,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:19:06,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:19:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 215 proven. 92 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 17:19:06,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 195 proven. 92 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-02 17:19:07,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:07,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448834085] [2023-12-02 17:19:07,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:07,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627107475] [2023-12-02 17:19:07,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627107475] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:19:07,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763689459] [2023-12-02 17:19:07,091 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:19:07,091 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:07,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:07,092 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:07,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:07,839 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:19:07,849 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:07,867 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:10,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33809#(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) (<= 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 17:19:10,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:10,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:19:10,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2023-12-02 17:19:10,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049873068] [2023-12-02 17:19:10,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:10,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:19:10,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:10,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:19:10,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:19:10,223 INFO L87 Difference]: Start difference. First operand 2570 states and 2996 transitions. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-02 17:19:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:10,699 INFO L93 Difference]: Finished difference Result 5158 states and 6039 transitions. [2023-12-02 17:19:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:19:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 137 [2023-12-02 17:19:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:10,713 INFO L225 Difference]: With dead ends: 5158 [2023-12-02 17:19:10,713 INFO L226 Difference]: Without dead ends: 3604 [2023-12-02 17:19:10,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 367 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:19:10,717 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 46 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:10,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 238 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:19:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2023-12-02 17:19:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 2739. [2023-12-02 17:19:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2561 states have (on average 1.1050370948848107) internal successors, (2830), 2564 states have internal predecessors, (2830), 171 states have call successors, (171), 3 states have call predecessors, (171), 3 states have return successors, (171), 171 states have call predecessors, (171), 171 states have call successors, (171) [2023-12-02 17:19:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3172 transitions. [2023-12-02 17:19:10,969 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3172 transitions. Word has length 137 [2023-12-02 17:19:10,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:10,969 INFO L495 AbstractCegarLoop]: Abstraction has 2739 states and 3172 transitions. [2023-12-02 17:19:10,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2023-12-02 17:19:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3172 transitions. [2023-12-02 17:19:10,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 17:19:10,972 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:19:10,972 INFO L195 NwaCegarLoop]: trace histogram [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 17:19:10,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 17:19:11,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 17:19:11,173 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:19:11,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:19:11,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1495905817, now seen corresponding path program 2 times [2023-12-02 17:19:11,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:19:11,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257735016] [2023-12-02 17:19:11,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:19:11,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:19:11,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:19:11,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012055988] [2023-12-02 17:19:11,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:19:11,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:19:11,184 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:19:11,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 17:19:11,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 17:19:11,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:19:11,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 17:19:11,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:19:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 12 proven. 74 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 17:19:11,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 17:19:11,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:11,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257735016] [2023-12-02 17:19:11,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:11,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012055988] [2023-12-02 17:19:11,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012055988] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:19:11,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [750384596] [2023-12-02 17:19:11,743 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:19:11,743 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:11,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:11,743 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:11,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:12,547 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:19:12,557 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:12,575 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:14,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43570#(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_~y2~0#1| 2147483647) (<= (* |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) (<= 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 17:19:14,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:14,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:19:14,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-02 17:19:14,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969781914] [2023-12-02 17:19:14,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:14,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:19:14,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:14,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:19:14,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:19:14,911 INFO L87 Difference]: Start difference. First operand 2739 states and 3172 transitions. Second operand has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:19:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:15,320 INFO L93 Difference]: Finished difference Result 2739 states and 3172 transitions. [2023-12-02 17:19:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:19:15,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 139 [2023-12-02 17:19:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:15,333 INFO L225 Difference]: With dead ends: 2739 [2023-12-02 17:19:15,333 INFO L226 Difference]: Without dead ends: 2738 [2023-12-02 17:19:15,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 361 SyntacticMatches, 23 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:19:15,334 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:15,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 27 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:19:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2023-12-02 17:19:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2656. [2023-12-02 17:19:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2483 states have (on average 1.058799838904551) internal successors, (2629), 2485 states have internal predecessors, (2629), 167 states have call successors, (167), 3 states have call predecessors, (167), 3 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) [2023-12-02 17:19:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 2963 transitions. [2023-12-02 17:19:15,539 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 2963 transitions. Word has length 139 [2023-12-02 17:19:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:15,539 INFO L495 AbstractCegarLoop]: Abstraction has 2656 states and 2963 transitions. [2023-12-02 17:19:15,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:19:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 2963 transitions. [2023-12-02 17:19:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-12-02 17:19:15,543 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:19:15,543 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:19:15,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 17:19:15,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 17:19:15,743 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:19:15,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:19:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1033978295, now seen corresponding path program 4 times [2023-12-02 17:19:15,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:19:15,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110891601] [2023-12-02 17:19:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:19:15,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:19:15,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:19:15,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645972961] [2023-12-02 17:19:15,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:19:15,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:15,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:19:15,756 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:19:15,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 17:19:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:19:15,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:19:15,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:19:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 172 proven. 252 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 17:19:16,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 172 proven. 252 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 17:19:16,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:16,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110891601] [2023-12-02 17:19:16,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:16,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645972961] [2023-12-02 17:19:16,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645972961] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:19:16,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969612774] [2023-12-02 17:19:16,160 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:19:16,160 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:16,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:16,161 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:16,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:16,952 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:19:16,968 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:16,986 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:19,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50628#(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) (<= 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 17:19:19,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:19,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:19:19,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2023-12-02 17:19:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819548486] [2023-12-02 17:19:19,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:19,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 17:19:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 17:19:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:19:19,397 INFO L87 Difference]: Start difference. First operand 2656 states and 2963 transitions. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 17:19:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:20,396 INFO L93 Difference]: Finished difference Result 7428 states and 8285 transitions. [2023-12-02 17:19:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 17:19:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 155 [2023-12-02 17:19:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:20,417 INFO L225 Difference]: With dead ends: 7428 [2023-12-02 17:19:20,417 INFO L226 Difference]: Without dead ends: 6007 [2023-12-02 17:19:20,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 414 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 17:19:20,421 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 128 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:20,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 544 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:19:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2023-12-02 17:19:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 3730. [2023-12-02 17:19:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3491 states have (on average 1.045259238040676) internal successors, (3649), 3493 states have internal predecessors, (3649), 233 states have call successors, (233), 3 states have call predecessors, (233), 3 states have return successors, (233), 233 states have call predecessors, (233), 233 states have call successors, (233) [2023-12-02 17:19:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 4115 transitions. [2023-12-02 17:19:20,753 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 4115 transitions. Word has length 155 [2023-12-02 17:19:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:20,754 INFO L495 AbstractCegarLoop]: Abstraction has 3730 states and 4115 transitions. [2023-12-02 17:19:20,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 17:19:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 4115 transitions. [2023-12-02 17:19:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-02 17:19:20,757 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:19:20,757 INFO L195 NwaCegarLoop]: trace histogram [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 17:19:20,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 17:19:20,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 17:19:20,958 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:19:20,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:19:20,958 INFO L85 PathProgramCache]: Analyzing trace with hash -270936779, now seen corresponding path program 2 times [2023-12-02 17:19:20,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:19:20,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210033956] [2023-12-02 17:19:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:19:20,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:19:20,969 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:19:20,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765424682] [2023-12-02 17:19:20,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:19:20,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:19:20,971 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:19:20,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 17:19:21,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 17:19:21,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:19:21,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:19:21,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:19:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 17:19:21,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 17:19:21,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:21,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210033956] [2023-12-02 17:19:21,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:21,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765424682] [2023-12-02 17:19:21,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765424682] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:19:21,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639889932] [2023-12-02 17:19:21,454 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:19:21,454 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:21,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:21,454 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:21,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:22,033 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:19:22,041 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:22,059 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:23,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64258#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 17:19:23,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:23,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:19:23,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-02 17:19:23,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131880227] [2023-12-02 17:19:23,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:23,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:19:23,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:23,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:19:23,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:19:23,602 INFO L87 Difference]: Start difference. First operand 3730 states and 4115 transitions. Second operand has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 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 17:19:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:24,538 INFO L93 Difference]: Finished difference Result 7115 states and 7875 transitions. [2023-12-02 17:19:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:19:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 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 168 [2023-12-02 17:19:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:24,563 INFO L225 Difference]: With dead ends: 7115 [2023-12-02 17:19:24,563 INFO L226 Difference]: Without dead ends: 7114 [2023-12-02 17:19:24,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:19:24,566 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 273 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:24,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 291 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:19:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2023-12-02 17:19:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 7080. [2023-12-02 17:19:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7080 states, 6631 states have (on average 1.046448499472176) internal successors, (6939), 6633 states have internal predecessors, (6939), 443 states have call successors, (443), 3 states have call predecessors, (443), 3 states have return successors, (443), 443 states have call predecessors, (443), 443 states have call successors, (443) [2023-12-02 17:19:25,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7080 states to 7080 states and 7825 transitions. [2023-12-02 17:19:25,051 INFO L78 Accepts]: Start accepts. Automaton has 7080 states and 7825 transitions. Word has length 168 [2023-12-02 17:19:25,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:25,052 INFO L495 AbstractCegarLoop]: Abstraction has 7080 states and 7825 transitions. [2023-12-02 17:19:25,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 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 17:19:25,052 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states and 7825 transitions. [2023-12-02 17:19:25,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 17:19:25,054 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:19:25,054 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:19:25,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 17:19:25,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 17:19:25,255 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:19:25,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:19:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2083676421, now seen corresponding path program 5 times [2023-12-02 17:19:25,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:19:25,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390639321] [2023-12-02 17:19:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:19:25,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:19:25,265 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:19:25,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487578167] [2023-12-02 17:19:25,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:19:25,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:25,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:19:25,266 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:19:25,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 17:19:25,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 17:19:25,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:19:25,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:19:25,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:19:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 274 proven. 51 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-12-02 17:19:25,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:26,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390639321] [2023-12-02 17:19:26,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487578167] [2023-12-02 17:19:26,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487578167] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:19:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [257464131] [2023-12-02 17:19:26,485 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:19:26,485 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:26,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:26,485 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:26,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:27,398 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:19:27,408 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:27,428 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:32,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '80874#(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) (<= 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 17:19:32,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:32,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:19:32,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-12-02 17:19:32,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566522235] [2023-12-02 17:19:32,105 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:32,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:19:32,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:32,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:19:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:19:32,106 INFO L87 Difference]: Start difference. First operand 7080 states and 7825 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 17:19:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:32,845 INFO L93 Difference]: Finished difference Result 11917 states and 13168 transitions. [2023-12-02 17:19:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:19:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 173 [2023-12-02 17:19:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:32,858 INFO L225 Difference]: With dead ends: 11917 [2023-12-02 17:19:32,858 INFO L226 Difference]: Without dead ends: 6369 [2023-12-02 17:19:32,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 331 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:19:32,866 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 59 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:32,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 142 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:19:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6369 states. [2023-12-02 17:19:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6369 to 6111. [2023-12-02 17:19:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6111 states, 5722 states have (on average 1.0470115344285216) internal successors, (5991), 5724 states have internal predecessors, (5991), 383 states have call successors, (383), 3 states have call predecessors, (383), 3 states have return successors, (383), 383 states have call predecessors, (383), 383 states have call successors, (383) [2023-12-02 17:19:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6111 states to 6111 states and 6757 transitions. [2023-12-02 17:19:33,320 INFO L78 Accepts]: Start accepts. Automaton has 6111 states and 6757 transitions. Word has length 173 [2023-12-02 17:19:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:33,321 INFO L495 AbstractCegarLoop]: Abstraction has 6111 states and 6757 transitions. [2023-12-02 17:19:33,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 9 states have internal predecessors, (75), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 17:19:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 6111 states and 6757 transitions. [2023-12-02 17:19:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-02 17:19:33,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:19:33,323 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:19:33,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 17:19:33,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:33,524 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:19:33,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:19:33,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1068540697, now seen corresponding path program 6 times [2023-12-02 17:19:33,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:19:33,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732517241] [2023-12-02 17:19:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:19:33,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:19:33,535 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:19:33,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681351951] [2023-12-02 17:19:33,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:19:33,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:33,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:19:33,536 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:19:33,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 17:19:33,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:19:33,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:19:33,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 17:19:33,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:19:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2023-12-02 17:19:34,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:34,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:34,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732517241] [2023-12-02 17:19:34,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:34,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681351951] [2023-12-02 17:19:34,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681351951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:19:34,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085992221] [2023-12-02 17:19:34,144 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:19:34,144 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:34,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:34,144 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:34,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:34,969 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:19:34,979 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:35,009 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:38,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '101819#(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) (<= 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 17:19:38,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:38,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:19:38,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 17:19:38,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295865941] [2023-12-02 17:19:38,207 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:38,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:19:38,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:38,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:19:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:19:38,208 INFO L87 Difference]: Start difference. First operand 6111 states and 6757 transitions. Second operand has 10 states, 9 states have (on average 11.333333333333334) internal successors, (102), 10 states have internal predecessors, (102), 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 17:19:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:38,846 INFO L93 Difference]: Finished difference Result 6466 states and 7146 transitions. [2023-12-02 17:19:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:19:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 11.333333333333334) internal successors, (102), 10 states have internal predecessors, (102), 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 191 [2023-12-02 17:19:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:38,859 INFO L225 Difference]: With dead ends: 6466 [2023-12-02 17:19:38,859 INFO L226 Difference]: Without dead ends: 6465 [2023-12-02 17:19:38,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 338 SyntacticMatches, 22 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:19:38,862 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 28 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:38,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 266 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:19:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2023-12-02 17:19:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 6175. [2023-12-02 17:19:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6175 states, 5782 states have (on average 1.0465236942234521) internal successors, (6051), 5784 states have internal predecessors, (6051), 387 states have call successors, (387), 3 states have call predecessors, (387), 3 states have return successors, (387), 387 states have call predecessors, (387), 387 states have call successors, (387) [2023-12-02 17:19:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6175 states to 6175 states and 6825 transitions. [2023-12-02 17:19:39,309 INFO L78 Accepts]: Start accepts. Automaton has 6175 states and 6825 transitions. Word has length 191 [2023-12-02 17:19:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:39,309 INFO L495 AbstractCegarLoop]: Abstraction has 6175 states and 6825 transitions. [2023-12-02 17:19:39,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 11.333333333333334) internal successors, (102), 10 states have internal predecessors, (102), 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 17:19:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 6175 states and 6825 transitions. [2023-12-02 17:19:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-12-02 17:19:39,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:19:39,312 INFO L195 NwaCegarLoop]: trace histogram [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 17:19:39,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 17:19:39,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 17:19:39,513 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:19:39,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:19:39,513 INFO L85 PathProgramCache]: Analyzing trace with hash -159477006, now seen corresponding path program 3 times [2023-12-02 17:19:39,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:19:39,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979375145] [2023-12-02 17:19:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:19:39,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:19:39,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:19:39,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694887100] [2023-12-02 17:19:39,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:19:39,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:39,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:19:39,524 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:19:39,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 17:19:39,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:19:39,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:19:39,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:19:39,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:19:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 0 proven. 830 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 17:19:39,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 0 proven. 830 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 17:19:40,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:40,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979375145] [2023-12-02 17:19:40,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:40,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694887100] [2023-12-02 17:19:40,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694887100] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:19:40,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [608257230] [2023-12-02 17:19:40,152 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:19:40,152 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:40,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:40,153 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:40,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:40,871 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 17:19:40,876 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:40,896 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:42,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117301#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 17:19:42,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:42,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:19:42,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-02 17:19:42,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748945382] [2023-12-02 17:19:42,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:42,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:19:42,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:42,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:19:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:19:42,124 INFO L87 Difference]: Start difference. First operand 6175 states and 6825 transitions. Second operand has 24 states, 23 states have (on average 14.130434782608695) internal successors, (325), 24 states have internal predecessors, (325), 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 17:19:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:43,235 INFO L93 Difference]: Finished difference Result 11392 states and 12866 transitions. [2023-12-02 17:19:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:19:43,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 14.130434782608695) internal successors, (325), 24 states have internal predecessors, (325), 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 201 [2023-12-02 17:19:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:43,251 INFO L225 Difference]: With dead ends: 11392 [2023-12-02 17:19:43,252 INFO L226 Difference]: Without dead ends: 11391 [2023-12-02 17:19:43,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 551 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:19:43,254 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 143 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:43,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 230 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:19:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11391 states. [2023-12-02 17:19:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11391 to 10591. [2023-12-02 17:19:44,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10591 states, 9922 states have (on average 1.054928441846402) internal successors, (10467), 9924 states have internal predecessors, (10467), 663 states have call successors, (663), 3 states have call predecessors, (663), 3 states have return successors, (663), 663 states have call predecessors, (663), 663 states have call successors, (663) [2023-12-02 17:19:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10591 states to 10591 states and 11793 transitions. [2023-12-02 17:19:44,251 INFO L78 Accepts]: Start accepts. Automaton has 10591 states and 11793 transitions. Word has length 201 [2023-12-02 17:19:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:44,251 INFO L495 AbstractCegarLoop]: Abstraction has 10591 states and 11793 transitions. [2023-12-02 17:19:44,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 14.130434782608695) internal successors, (325), 24 states have internal predecessors, (325), 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 17:19:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 10591 states and 11793 transitions. [2023-12-02 17:19:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-12-02 17:19:44,254 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:19:44,254 INFO L195 NwaCegarLoop]: trace histogram [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 17:19:44,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 17:19:44,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 17:19:44,454 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:19:44,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:19:44,455 INFO L85 PathProgramCache]: Analyzing trace with hash -628357887, now seen corresponding path program 7 times [2023-12-02 17:19:44,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:19:44,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336019735] [2023-12-02 17:19:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:19:44,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:19:44,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:19:44,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177525646] [2023-12-02 17:19:44,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:19:44,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:44,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:19:44,471 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:19:44,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 17:19:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:19:44,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:19:44,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:19:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 257 proven. 584 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 17:19:44,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 257 proven. 584 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 17:19:45,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:45,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336019735] [2023-12-02 17:19:45,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:45,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177525646] [2023-12-02 17:19:45,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177525646] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:19:45,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585050711] [2023-12-02 17:19:45,162 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:19:45,163 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:45,163 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:45,163 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:45,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:46,113 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:19:46,123 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:46,141 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:49,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '143228#(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) (<= 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 17:19:49,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:49,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:19:49,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2023-12-02 17:19:49,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142642613] [2023-12-02 17:19:49,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:49,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:19:49,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:49,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:19:49,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 17:19:49,670 INFO L87 Difference]: Start difference. First operand 10591 states and 11793 transitions. Second operand has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-02 17:19:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:51,319 INFO L93 Difference]: Finished difference Result 24199 states and 26980 transitions. [2023-12-02 17:19:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:19:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 209 [2023-12-02 17:19:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:51,357 INFO L225 Difference]: With dead ends: 24199 [2023-12-02 17:19:51,358 INFO L226 Difference]: Without dead ends: 17579 [2023-12-02 17:19:51,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 554 SyntacticMatches, 31 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=275, Invalid=1981, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:19:51,369 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 51 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:51,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 476 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:19:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17579 states. [2023-12-02 17:19:52,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17579 to 12120. [2023-12-02 17:19:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12120 states, 11356 states have (on average 1.0494011976047903) internal successors, (11917), 11358 states have internal predecessors, (11917), 758 states have call successors, (758), 3 states have call predecessors, (758), 3 states have return successors, (758), 758 states have call predecessors, (758), 758 states have call successors, (758) [2023-12-02 17:19:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12120 states to 12120 states and 13433 transitions. [2023-12-02 17:19:52,496 INFO L78 Accepts]: Start accepts. Automaton has 12120 states and 13433 transitions. Word has length 209 [2023-12-02 17:19:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:19:52,497 INFO L495 AbstractCegarLoop]: Abstraction has 12120 states and 13433 transitions. [2023-12-02 17:19:52,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-02 17:19:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 12120 states and 13433 transitions. [2023-12-02 17:19:52,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 17:19:52,501 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:19:52,502 INFO L195 NwaCegarLoop]: trace histogram [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 17:19:52,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-02 17:19:52,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:52,702 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:19:52,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:19:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash -522076567, now seen corresponding path program 8 times [2023-12-02 17:19:52,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:19:52,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729350555] [2023-12-02 17:19:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:19:52,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:19:52,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:19:52,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139912826] [2023-12-02 17:19:52,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:19:52,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:19:52,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:19:52,719 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:19:52,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 17:19:52,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 17:19:52,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:19:52,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 17:19:52,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:19:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 0 proven. 792 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2023-12-02 17:19:53,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:53,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729350555] [2023-12-02 17:19:53,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:53,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139912826] [2023-12-02 17:19:53,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139912826] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:19:53,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152367856] [2023-12-02 17:19:53,644 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:19:53,644 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:53,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:53,644 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:53,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:54,374 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:19:54,384 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:19:54,402 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:58,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '184867#(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) (<= 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 17:19:58,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:58,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:19:58,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 17:19:58,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820527814] [2023-12-02 17:19:58,049 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:58,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:19:58,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:19:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:19:58,050 INFO L87 Difference]: Start difference. First operand 12120 states and 13433 transitions. Second operand has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 12 states have internal predecessors, (117), 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 17:19:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:19:59,632 INFO L93 Difference]: Finished difference Result 19111 states and 21216 transitions. [2023-12-02 17:19:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:19:59,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 12 states have internal predecessors, (117), 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 227 [2023-12-02 17:19:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:19:59,654 INFO L225 Difference]: With dead ends: 19111 [2023-12-02 17:19:59,655 INFO L226 Difference]: Without dead ends: 12594 [2023-12-02 17:19:59,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 403 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:19:59,666 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 210 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:19:59,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 438 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:19:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2023-12-02 17:20:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 12216. [2023-12-02 17:20:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12216 states, 11446 states have (on average 1.0490127555477897) internal successors, (12007), 11448 states have internal predecessors, (12007), 764 states have call successors, (764), 3 states have call predecessors, (764), 3 states have return successors, (764), 764 states have call predecessors, (764), 764 states have call successors, (764) [2023-12-02 17:20:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 13535 transitions. [2023-12-02 17:20:00,679 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 13535 transitions. Word has length 227 [2023-12-02 17:20:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:00,680 INFO L495 AbstractCegarLoop]: Abstraction has 12216 states and 13535 transitions. [2023-12-02 17:20:00,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.636363636363637) internal successors, (117), 12 states have internal predecessors, (117), 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 17:20:00,680 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 13535 transitions. [2023-12-02 17:20:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 17:20:00,683 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:00,683 INFO L195 NwaCegarLoop]: trace histogram [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 17:20:00,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-02 17:20:00,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-02 17:20:00,884 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:20:00,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:00,884 INFO L85 PathProgramCache]: Analyzing trace with hash 564193587, now seen corresponding path program 9 times [2023-12-02 17:20:00,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:00,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823469268] [2023-12-02 17:20:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:00,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:00,895 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:20:00,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650545319] [2023-12-02 17:20:00,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:20:00,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:00,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:00,896 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:00,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 17:20:00,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:20:00,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:20:00,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 17:20:00,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 0 proven. 816 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-12-02 17:20:01,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 0 proven. 816 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-12-02 17:20:01,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:01,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823469268] [2023-12-02 17:20:01,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:20:01,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650545319] [2023-12-02 17:20:01,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650545319] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:01,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2143438722] [2023-12-02 17:20:01,808 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:20:01,808 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:01,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:01,808 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:01,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:02,561 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:20:02,571 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:20:02,590 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:06,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '221547#(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) (<= 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 17:20:06,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:06,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:20:06,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-12-02 17:20:06,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144113928] [2023-12-02 17:20:06,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:06,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:20:06,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:20:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:20:06,350 INFO L87 Difference]: Start difference. First operand 12216 states and 13535 transitions. Second operand has 18 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 17:20:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:11,700 INFO L93 Difference]: Finished difference Result 15653 states and 17344 transitions. [2023-12-02 17:20:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 17:20:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 227 [2023-12-02 17:20:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:11,716 INFO L225 Difference]: With dead ends: 15653 [2023-12-02 17:20:11,716 INFO L226 Difference]: Without dead ends: 15652 [2023-12-02 17:20:11,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 613 SyntacticMatches, 27 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=650, Invalid=4042, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 17:20:11,721 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 366 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:11,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 520 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:20:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2023-12-02 17:20:12,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 15350. [2023-12-02 17:20:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15350 states, 14385 states have (on average 1.0480361487660759) internal successors, (15076), 14387 states have internal predecessors, (15076), 959 states have call successors, (959), 3 states have call predecessors, (959), 3 states have return successors, (959), 959 states have call predecessors, (959), 959 states have call successors, (959) [2023-12-02 17:20:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15350 states to 15350 states and 16994 transitions. [2023-12-02 17:20:12,888 INFO L78 Accepts]: Start accepts. Automaton has 15350 states and 16994 transitions. Word has length 227 [2023-12-02 17:20:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:12,889 INFO L495 AbstractCegarLoop]: Abstraction has 15350 states and 16994 transitions. [2023-12-02 17:20:12,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 12.411764705882353) internal successors, (211), 18 states have internal predecessors, (211), 13 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-02 17:20:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 15350 states and 16994 transitions. [2023-12-02 17:20:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 17:20:12,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:12,894 INFO L195 NwaCegarLoop]: trace histogram [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 17:20:12,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 17:20:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:13,095 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:20:13,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2077693551, now seen corresponding path program 10 times [2023-12-02 17:20:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005187927] [2023-12-02 17:20:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:13,109 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:20:13,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104562230] [2023-12-02 17:20:13,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:20:13,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:13,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:13,111 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:13,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 17:20:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:13,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 17:20:13,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2023-12-02 17:20:13,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 888 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2023-12-02 17:20:14,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:14,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005187927] [2023-12-02 17:20:14,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:20:14,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104562230] [2023-12-02 17:20:14,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104562230] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:14,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269614791] [2023-12-02 17:20:14,654 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:20:14,654 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:14,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:14,654 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:14,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:15,445 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:20:15,455 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:20:15,473 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:19,062 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '257894#(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) (<= 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 17:20:19,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:19,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:20:19,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-02 17:20:19,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699278477] [2023-12-02 17:20:19,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:19,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:20:19,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:19,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:20:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 17:20:19,064 INFO L87 Difference]: Start difference. First operand 15350 states and 16994 transitions. Second operand has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 17:20:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:22,250 INFO L93 Difference]: Finished difference Result 19489 states and 21559 transitions. [2023-12-02 17:20:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 17:20:22,250 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 227 [2023-12-02 17:20:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:22,274 INFO L225 Difference]: With dead ends: 19489 [2023-12-02 17:20:22,275 INFO L226 Difference]: Without dead ends: 19488 [2023-12-02 17:20:22,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 626 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=665, Invalid=3891, Unknown=0, NotChecked=0, Total=4556 [2023-12-02 17:20:22,280 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 226 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:22,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 737 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:20:22,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19488 states. [2023-12-02 17:20:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19488 to 19310. [2023-12-02 17:20:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19310 states, 18097 states have (on average 1.0463612753495055) internal successors, (18936), 18099 states have internal predecessors, (18936), 1207 states have call successors, (1207), 3 states have call predecessors, (1207), 3 states have return successors, (1207), 1207 states have call predecessors, (1207), 1207 states have call successors, (1207) [2023-12-02 17:20:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19310 states to 19310 states and 21350 transitions. [2023-12-02 17:20:23,933 INFO L78 Accepts]: Start accepts. Automaton has 19310 states and 21350 transitions. Word has length 227 [2023-12-02 17:20:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:23,933 INFO L495 AbstractCegarLoop]: Abstraction has 19310 states and 21350 transitions. [2023-12-02 17:20:23,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 14.263157894736842) internal successors, (271), 20 states have internal predecessors, (271), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-12-02 17:20:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 19310 states and 21350 transitions. [2023-12-02 17:20:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-12-02 17:20:23,940 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:23,941 INFO L195 NwaCegarLoop]: trace histogram [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 17:20:23,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 17:20:24,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 17:20:24,141 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:20:24,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash -473130103, now seen corresponding path program 11 times [2023-12-02 17:20:24,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:24,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864106546] [2023-12-02 17:20:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:24,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:24,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:20:24,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512082193] [2023-12-02 17:20:24,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:20:24,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:24,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:24,158 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:24,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 17:20:24,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 17:20:24,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:20:24,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 17:20:24,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2098 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2023-12-02 17:20:24,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:24,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:24,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864106546] [2023-12-02 17:20:24,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:20:24,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512082193] [2023-12-02 17:20:24,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512082193] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:20:24,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747102733] [2023-12-02 17:20:24,788 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:20:24,788 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:24,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:24,788 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:24,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:25,566 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:20:25,576 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:20:25,594 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:28,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302576#(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) (<= 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 17:20:28,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:28,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:20:28,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 17:20:28,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104135932] [2023-12-02 17:20:28,591 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:28,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:20:28,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:28,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:20:28,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:20:28,592 INFO L87 Difference]: Start difference. First operand 19310 states and 21350 transitions. Second operand has 12 states, 11 states have (on average 12.0) internal successors, (132), 12 states have internal predecessors, (132), 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 17:20:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:30,856 INFO L93 Difference]: Finished difference Result 27036 states and 29948 transitions. [2023-12-02 17:20:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 17:20:30,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 12.0) internal successors, (132), 12 states have internal predecessors, (132), 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 299 [2023-12-02 17:20:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:30,876 INFO L225 Difference]: With dead ends: 27036 [2023-12-02 17:20:30,876 INFO L226 Difference]: Without dead ends: 20535 [2023-12-02 17:20:30,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 557 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 17:20:30,885 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 207 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:30,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 693 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:20:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20535 states. [2023-12-02 17:20:32,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20535 to 19330. [2023-12-02 17:20:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19330 states, 18116 states have (on average 1.0463126517995143) internal successors, (18955), 18118 states have internal predecessors, (18955), 1208 states have call successors, (1208), 3 states have call predecessors, (1208), 3 states have return successors, (1208), 1208 states have call predecessors, (1208), 1208 states have call successors, (1208) [2023-12-02 17:20:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19330 states to 19330 states and 21371 transitions. [2023-12-02 17:20:32,384 INFO L78 Accepts]: Start accepts. Automaton has 19330 states and 21371 transitions. Word has length 299 [2023-12-02 17:20:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:32,384 INFO L495 AbstractCegarLoop]: Abstraction has 19330 states and 21371 transitions. [2023-12-02 17:20:32,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 12.0) internal successors, (132), 12 states have internal predecessors, (132), 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 17:20:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 19330 states and 21371 transitions. [2023-12-02 17:20:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-12-02 17:20:32,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:32,392 INFO L195 NwaCegarLoop]: trace histogram [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 17:20:32,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 17:20:32,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:32,592 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:20:32,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:32,592 INFO L85 PathProgramCache]: Analyzing trace with hash 837599985, now seen corresponding path program 12 times [2023-12-02 17:20:32,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:32,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202927710] [2023-12-02 17:20:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:32,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:32,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:20:32,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814828457] [2023-12-02 17:20:32,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:20:32,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:32,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:32,608 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:32,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 17:20:32,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:20:32,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:20:32,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 17:20:32,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 599 proven. 1508 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 17:20:33,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 599 proven. 1508 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 17:20:33,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202927710] [2023-12-02 17:20:33,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:20:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814828457] [2023-12-02 17:20:33,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814828457] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146622184] [2023-12-02 17:20:33,580 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:20:33,580 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:33,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:33,581 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:33,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:34,345 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:20:34,355 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:20:34,373 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:37,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '356732#(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) (<= 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 17:20:37,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:37,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:20:37,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2023-12-02 17:20:37,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907000504] [2023-12-02 17:20:37,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:37,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:20:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:37,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:20:37,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:20:37,745 INFO L87 Difference]: Start difference. First operand 19330 states and 21371 transitions. Second operand has 28 states, 28 states have (on average 13.607142857142858) internal successors, (381), 28 states have internal predecessors, (381), 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 17:20:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:20:41,022 INFO L93 Difference]: Finished difference Result 42369 states and 46981 transitions. [2023-12-02 17:20:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:20:41,023 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 13.607142857142858) internal successors, (381), 28 states have internal predecessors, (381), 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 317 [2023-12-02 17:20:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:20:41,064 INFO L225 Difference]: With dead ends: 42369 [2023-12-02 17:20:41,064 INFO L226 Difference]: Without dead ends: 31324 [2023-12-02 17:20:41,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 873 SyntacticMatches, 27 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=449, Invalid=3091, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 17:20:41,078 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 60 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:20:41,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 974 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:20:41,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31324 states. [2023-12-02 17:20:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31324 to 23435. [2023-12-02 17:20:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23435 states, 21965 states have (on average 1.038652401547917) internal successors, (22814), 21967 states have internal predecessors, (22814), 1464 states have call successors, (1464), 3 states have call predecessors, (1464), 3 states have return successors, (1464), 1464 states have call predecessors, (1464), 1464 states have call successors, (1464) [2023-12-02 17:20:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23435 states to 23435 states and 25742 transitions. [2023-12-02 17:20:43,177 INFO L78 Accepts]: Start accepts. Automaton has 23435 states and 25742 transitions. Word has length 317 [2023-12-02 17:20:43,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:20:43,178 INFO L495 AbstractCegarLoop]: Abstraction has 23435 states and 25742 transitions. [2023-12-02 17:20:43,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.607142857142858) internal successors, (381), 28 states have internal predecessors, (381), 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 17:20:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 23435 states and 25742 transitions. [2023-12-02 17:20:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2023-12-02 17:20:43,191 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:20:43,191 INFO L195 NwaCegarLoop]: trace histogram [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 17:20:43,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 17:20:43,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:43,392 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:20:43,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:20:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1171726247, now seen corresponding path program 13 times [2023-12-02 17:20:43,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:20:43,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624355448] [2023-12-02 17:20:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:20:43,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:20:43,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:20:43,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521829502] [2023-12-02 17:20:43,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:20:43,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:20:43,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:20:43,408 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:20:43,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 17:20:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:20:43,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 17:20:43,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:20:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2682 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2023-12-02 17:20:44,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:20:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2682 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2023-12-02 17:20:44,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:20:44,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624355448] [2023-12-02 17:20:44,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:20:44,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521829502] [2023-12-02 17:20:44,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521829502] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:20:44,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [65392660] [2023-12-02 17:20:44,969 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:20:44,969 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:20:44,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:20:44,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:20:44,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:20:45,723 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:20:45,733 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:20:45,752 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:20:49,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '432838#(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) (<= 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 17:20:49,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:20:49,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:20:49,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-02 17:20:49,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474224043] [2023-12-02 17:20:49,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:20:49,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 17:20:49,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:20:49,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 17:20:49,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 17:20:49,837 INFO L87 Difference]: Start difference. First operand 23435 states and 25742 transitions. Second operand has 26 states, 25 states have (on average 12.84) internal successors, (321), 26 states have internal predecessors, (321), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 17:21:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:00,533 INFO L93 Difference]: Finished difference Result 26153 states and 28732 transitions. [2023-12-02 17:21:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-02 17:21:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 12.84) internal successors, (321), 26 states have internal predecessors, (321), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 335 [2023-12-02 17:21:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:00,563 INFO L225 Difference]: With dead ends: 26153 [2023-12-02 17:21:00,563 INFO L226 Difference]: Without dead ends: 26152 [2023-12-02 17:21:00,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1058 GetRequests, 938 SyntacticMatches, 18 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3526 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1790, Invalid=8922, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 17:21:00,569 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 716 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:00,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 972 Invalid, 2723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2548 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 17:21:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26152 states. [2023-12-02 17:21:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26152 to 25284. [2023-12-02 17:21:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25284 states, 23699 states have (on average 1.0389889868770834) internal successors, (24623), 23701 states have internal predecessors, (24623), 1579 states have call successors, (1579), 3 states have call predecessors, (1579), 3 states have return successors, (1579), 1579 states have call predecessors, (1579), 1579 states have call successors, (1579) [2023-12-02 17:21:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25284 states to 25284 states and 27781 transitions. [2023-12-02 17:21:02,641 INFO L78 Accepts]: Start accepts. Automaton has 25284 states and 27781 transitions. Word has length 335 [2023-12-02 17:21:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:02,642 INFO L495 AbstractCegarLoop]: Abstraction has 25284 states and 27781 transitions. [2023-12-02 17:21:02,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 12.84) internal successors, (321), 26 states have internal predecessors, (321), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 17:21:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 25284 states and 27781 transitions. [2023-12-02 17:21:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-12-02 17:21:02,651 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:02,651 INFO L195 NwaCegarLoop]: trace histogram [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 17:21:02,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 17:21:02,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:02,852 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:21:02,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1609462975, now seen corresponding path program 3 times [2023-12-02 17:21:02,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:02,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336652045] [2023-12-02 17:21:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:02,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:02,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:21:02,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434664156] [2023-12-02 17:21:02,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:21:02,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:02,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:02,870 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:21:02,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 17:21:02,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:21:02,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:21:02,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 17:21:03,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:21:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 0 proven. 2700 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 17:21:03,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:21:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 0 proven. 2700 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 17:21:03,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336652045] [2023-12-02 17:21:03,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:21:03,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434664156] [2023-12-02 17:21:03,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434664156] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:21:03,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1800593435] [2023-12-02 17:21:03,989 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:21:03,989 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:21:03,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:21:03,989 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:21:03,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:21:04,587 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:21:04,596 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:21:04,614 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:21:06,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '492974#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 17:21:06,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:21:06,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:21:06,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2023-12-02 17:21:06,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073417845] [2023-12-02 17:21:06,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:21:06,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-02 17:21:06,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-02 17:21:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=2561, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:21:06,197 INFO L87 Difference]: Start difference. First operand 25284 states and 27781 transitions. Second operand has 40 states, 39 states have (on average 14.64102564102564) internal successors, (571), 40 states have internal predecessors, (571), 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 17:21:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:10,279 INFO L93 Difference]: Finished difference Result 39099 states and 43041 transitions. [2023-12-02 17:21:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 17:21:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 14.64102564102564) internal successors, (571), 40 states have internal predecessors, (571), 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 348 [2023-12-02 17:21:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:10,322 INFO L225 Difference]: With dead ends: 39099 [2023-12-02 17:21:10,322 INFO L226 Difference]: Without dead ends: 39098 [2023-12-02 17:21:10,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 985 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=861, Invalid=2561, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:21:10,329 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 833 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:10,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 526 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:21:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39098 states. [2023-12-02 17:21:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39098 to 39024. [2023-12-02 17:21:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39024 states, 36579 states have (on average 1.0400229639957352) internal successors, (38043), 36581 states have internal predecessors, (38043), 2439 states have call successors, (2439), 3 states have call predecessors, (2439), 3 states have return successors, (2439), 2439 states have call predecessors, (2439), 2439 states have call successors, (2439) [2023-12-02 17:21:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39024 states to 39024 states and 42921 transitions. [2023-12-02 17:21:13,664 INFO L78 Accepts]: Start accepts. Automaton has 39024 states and 42921 transitions. Word has length 348 [2023-12-02 17:21:13,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:13,664 INFO L495 AbstractCegarLoop]: Abstraction has 39024 states and 42921 transitions. [2023-12-02 17:21:13,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 14.64102564102564) internal successors, (571), 40 states have internal predecessors, (571), 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 17:21:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 39024 states and 42921 transitions. [2023-12-02 17:21:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-12-02 17:21:13,675 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:13,675 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:13,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 17:21:13,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 17:21:13,876 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:21:13,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:13,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1817617091, now seen corresponding path program 14 times [2023-12-02 17:21:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:13,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489823253] [2023-12-02 17:21:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:13,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:13,893 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:21:13,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709085706] [2023-12-02 17:21:13,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:21:13,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:13,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:13,895 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:21:13,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 17:21:14,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 17:21:14,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:21:14,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 17:21:14,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:21:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 1222 proven. 187 refuted. 0 times theorem prover too weak. 1817 trivial. 0 not checked. [2023-12-02 17:21:22,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:21:22,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489823253] [2023-12-02 17:21:22,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:21:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709085706] [2023-12-02 17:21:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709085706] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:21:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033096228] [2023-12-02 17:21:22,773 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:21:22,773 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:21:22,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:21:22,774 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:21:22,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:21:23,531 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:21:23,542 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:21:23,560 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:21:31,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '582065#(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) (<= 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 17:21:31,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:21:31,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:21:31,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-02 17:21:31,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467727286] [2023-12-02 17:21:31,913 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:21:31,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:21:31,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:31,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:21:31,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2051, Unknown=6, NotChecked=0, Total=2256 [2023-12-02 17:21:31,914 INFO L87 Difference]: Start difference. First operand 39024 states and 42921 transitions. Second operand has 21 states, 18 states have (on average 6.222222222222222) internal successors, (112), 21 states have internal predecessors, (112), 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 17:21:34,603 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 17:21:36,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:21:40,142 WARN L539 Checker$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 17:21:42,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:21:45,798 WARN L539 Checker$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 17:21:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:50,698 INFO L93 Difference]: Finished difference Result 65505 states and 72124 transitions. [2023-12-02 17:21:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 17:21:50,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 6.222222222222222) internal successors, (112), 21 states have internal predecessors, (112), 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 371 [2023-12-02 17:21:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:50,738 INFO L225 Difference]: With dead ends: 65505 [2023-12-02 17:21:50,739 INFO L226 Difference]: Without dead ends: 35601 [2023-12-02 17:21:50,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 663 SyntacticMatches, 44 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=451, Invalid=4799, Unknown=6, NotChecked=0, Total=5256 [2023-12-02 17:21:50,762 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 163 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 18 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:50,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 171 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2150 Invalid, 5 Unknown, 0 Unchecked, 12.9s Time] [2023-12-02 17:21:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35601 states. [2023-12-02 17:21:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35601 to 34768. [2023-12-02 17:21:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34768 states, 32588 states have (on average 1.0421013870136246) internal successors, (33960), 32590 states have internal predecessors, (33960), 2174 states have call successors, (2174), 3 states have call predecessors, (2174), 3 states have return successors, (2174), 2174 states have call predecessors, (2174), 2174 states have call successors, (2174) [2023-12-02 17:21:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34768 states to 34768 states and 38308 transitions. [2023-12-02 17:21:53,724 INFO L78 Accepts]: Start accepts. Automaton has 34768 states and 38308 transitions. Word has length 371 [2023-12-02 17:21:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:53,724 INFO L495 AbstractCegarLoop]: Abstraction has 34768 states and 38308 transitions. [2023-12-02 17:21:53,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 6.222222222222222) internal successors, (112), 21 states have internal predecessors, (112), 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 17:21:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 34768 states and 38308 transitions. [2023-12-02 17:21:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2023-12-02 17:21:53,736 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:53,736 INFO L195 NwaCegarLoop]: trace histogram [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 17:21:53,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 17:21:53,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 17:21:53,937 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:21:53,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash -179749422, now seen corresponding path program 4 times [2023-12-02 17:21:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:53,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114166382] [2023-12-02 17:21:53,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:53,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:53,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:21:53,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779698609] [2023-12-02 17:21:53,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:21:53,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:53,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:53,957 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:21:53,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 17:21:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:54,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:21:54,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:21:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 3938 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-12-02 17:21:54,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:21:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 3938 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2023-12-02 17:21:55,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114166382] [2023-12-02 17:21:55,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:21:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779698609] [2023-12-02 17:21:55,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779698609] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:21:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1873562677] [2023-12-02 17:21:55,452 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:21:55,452 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:21:55,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:21:55,453 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:21:55,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:21:56,067 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-12-02 17:21:56,072 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:21:56,090 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:21:58,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '697518#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= 2147483647 |ULTIMATE.start_main_~y2~0#1|) (<= |ULTIMATE.start_main_~x2~0#1| 2147483647) (= |ULTIMATE.start_main_~y1~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~x2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647))' at error location [2023-12-02 17:21:58,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:21:58,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:21:58,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-12-02 17:21:58,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248799561] [2023-12-02 17:21:58,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:21:58,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 17:21:58,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:58,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 17:21:58,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=2975, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 17:21:58,035 INFO L87 Difference]: Start difference. First operand 34768 states and 38308 transitions. Second operand has 48 states, 47 states have (on average 14.574468085106384) internal successors, (685), 48 states have internal predecessors, (685), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 17:22:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:03,731 INFO L93 Difference]: Finished difference Result 63974 states and 72051 transitions. [2023-12-02 17:22:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 17:22:03,732 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 14.574468085106384) internal successors, (685), 48 states have internal predecessors, (685), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) Word has length 417 [2023-12-02 17:22:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:03,805 INFO L225 Difference]: With dead ends: 63974 [2023-12-02 17:22:03,805 INFO L226 Difference]: Without dead ends: 63973 [2023-12-02 17:22:03,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1249 GetRequests, 1163 SyntacticMatches, 23 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2972 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1185, Invalid=2975, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 17:22:03,814 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 452 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:03,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 423 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:22:03,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63973 states. [2023-12-02 17:22:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63973 to 58960. [2023-12-02 17:22:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58960 states, 55268 states have (on average 1.052182094521242) internal successors, (58152), 55270 states have internal predecessors, (58152), 3686 states have call successors, (3686), 3 states have call predecessors, (3686), 3 states have return successors, (3686), 3686 states have call predecessors, (3686), 3686 states have call successors, (3686) [2023-12-02 17:22:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58960 states to 58960 states and 65524 transitions. [2023-12-02 17:22:09,717 INFO L78 Accepts]: Start accepts. Automaton has 58960 states and 65524 transitions. Word has length 417 [2023-12-02 17:22:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:09,718 INFO L495 AbstractCegarLoop]: Abstraction has 58960 states and 65524 transitions. [2023-12-02 17:22:09,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 14.574468085106384) internal successors, (685), 48 states have internal predecessors, (685), 47 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-12-02 17:22:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 58960 states and 65524 transitions. [2023-12-02 17:22:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2023-12-02 17:22:09,730 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:09,730 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 20, 20, 20, 20, 20, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:09,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 17:22:09,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 17:22:09,931 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:09,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:09,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1400905251, now seen corresponding path program 15 times [2023-12-02 17:22:09,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:09,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156364267] [2023-12-02 17:22:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:09,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:09,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:22:09,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624813018] [2023-12-02 17:22:09,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:22:09,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:09,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:09,948 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:09,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 17:22:10,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:22:10,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:22:10,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 17:22:10,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4722 backedges. 0 proven. 3508 refuted. 0 times theorem prover too weak. 1214 trivial. 0 not checked. [2023-12-02 17:22:10,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:11,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:11,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156364267] [2023-12-02 17:22:11,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:22:11,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624813018] [2023-12-02 17:22:11,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624813018] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:11,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [583002880] [2023-12-02 17:22:11,034 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:22:11,034 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:22:11,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:22:11,034 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:22:11,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:22:11,825 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:22:11,835 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:22:11,853 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:22:15,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '836620#(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) (<= 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 17:22:15,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:22:15,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:22:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-02 17:22:15,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415424495] [2023-12-02 17:22:15,960 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:15,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:22:15,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:22:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:22:15,961 INFO L87 Difference]: Start difference. First operand 58960 states and 65524 transitions. Second operand has 13 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 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 17:22:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:21,326 INFO L93 Difference]: Finished difference Result 61569 states and 68420 transitions. [2023-12-02 17:22:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 17:22:21,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 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 443 [2023-12-02 17:22:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:21,403 INFO L225 Difference]: With dead ends: 61569 [2023-12-02 17:22:21,403 INFO L226 Difference]: Without dead ends: 61568 [2023-12-02 17:22:21,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 837 SyntacticMatches, 24 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:22:21,413 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:21,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 360 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:22:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61568 states. [2023-12-02 17:22:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61568 to 60696. [2023-12-02 17:22:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60696 states, 56896 states have (on average 1.0521653543307086) internal successors, (59864), 56898 states have internal predecessors, (59864), 3794 states have call successors, (3794), 3 states have call predecessors, (3794), 3 states have return successors, (3794), 3794 states have call predecessors, (3794), 3794 states have call successors, (3794) [2023-12-02 17:22:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60696 states to 60696 states and 67452 transitions. [2023-12-02 17:22:26,618 INFO L78 Accepts]: Start accepts. Automaton has 60696 states and 67452 transitions. Word has length 443 [2023-12-02 17:22:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:26,619 INFO L495 AbstractCegarLoop]: Abstraction has 60696 states and 67452 transitions. [2023-12-02 17:22:26,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.083333333333334) internal successors, (157), 13 states have internal predecessors, (157), 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 17:22:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 60696 states and 67452 transitions. [2023-12-02 17:22:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-12-02 17:22:26,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:26,636 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 22, 22, 22, 22, 22, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:26,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-02 17:22:26,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 17:22:26,837 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:26,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:26,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1597742163, now seen corresponding path program 16 times [2023-12-02 17:22:26,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:26,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002688052] [2023-12-02 17:22:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:26,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:26,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:22:26,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371458051] [2023-12-02 17:22:26,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:22:26,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:26,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:26,858 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:26,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-02 17:22:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:26,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 17:22:26,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5578 backedges. 3306 proven. 936 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-12-02 17:22:27,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5578 backedges. 2970 proven. 936 refuted. 0 times theorem prover too weak. 1672 trivial. 0 not checked. [2023-12-02 17:22:27,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:27,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002688052] [2023-12-02 17:22:27,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:22:27,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371458051] [2023-12-02 17:22:27,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371458051] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:27,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28255058] [2023-12-02 17:22:27,731 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:22:27,731 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:22:27,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:22:27,731 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:22:27,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:22:28,466 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:22:28,477 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:22:28,495 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:22:33,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '977109#(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) (<= 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 17:22:33,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:22:33,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:22:33,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2023-12-02 17:22:33,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379344554] [2023-12-02 17:22:33,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:22:33,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:22:33,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:33,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:22:33,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1972, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 17:22:33,018 INFO L87 Difference]: Start difference. First operand 60696 states and 67452 transitions. Second operand has 25 states, 25 states have (on average 13.56) internal successors, (339), 25 states have internal predecessors, (339), 23 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2023-12-02 17:22:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:45,380 INFO L93 Difference]: Finished difference Result 182458 states and 203426 transitions. [2023-12-02 17:22:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 17:22:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 13.56) internal successors, (339), 25 states have internal predecessors, (339), 23 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) Word has length 479 [2023-12-02 17:22:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:45,571 INFO L225 Difference]: With dead ends: 182458 [2023-12-02 17:22:45,571 INFO L226 Difference]: Without dead ends: 138848 [2023-12-02 17:22:45,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 1356 SyntacticMatches, 33 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=513, Invalid=3519, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 17:22:45,626 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 194 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:45,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 942 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:22:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138848 states. [2023-12-02 17:22:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138848 to 71567. [2023-12-02 17:22:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71567 states, 67090 states have (on average 1.0452377403487851) internal successors, (70125), 67092 states have internal predecessors, (70125), 4471 states have call successors, (4471), 3 states have call predecessors, (4471), 3 states have return successors, (4471), 4471 states have call predecessors, (4471), 4471 states have call successors, (4471) [2023-12-02 17:22:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71567 states to 71567 states and 79067 transitions. [2023-12-02 17:22:52,954 INFO L78 Accepts]: Start accepts. Automaton has 71567 states and 79067 transitions. Word has length 479 [2023-12-02 17:22:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:52,955 INFO L495 AbstractCegarLoop]: Abstraction has 71567 states and 79067 transitions. [2023-12-02 17:22:52,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.56) internal successors, (339), 25 states have internal predecessors, (339), 23 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2023-12-02 17:22:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 71567 states and 79067 transitions. [2023-12-02 17:22:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 17:22:52,976 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:52,976 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 26, 26, 26, 26, 26, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:52,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-02 17:22:53,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:53,177 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:22:53,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1910157673, now seen corresponding path program 17 times [2023-12-02 17:22:53,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:53,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735702072] [2023-12-02 17:22:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:53,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:53,197 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:22:53,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100035577] [2023-12-02 17:22:53,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:22:53,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:53,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:53,199 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:53,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 17:22:53,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 17:22:53,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:22:53,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:22:53,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 3260 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2023-12-02 17:22:53,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:54,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735702072] [2023-12-02 17:22:54,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:22:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100035577] [2023-12-02 17:22:54,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100035577] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641920598] [2023-12-02 17:22:54,128 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:22:54,128 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:22:54,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:22:54,128 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:22:54,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:22:54,902 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:22:54,914 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:22:54,931 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:23:00,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1264580#(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) (<= 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 17:23:00,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:23:00,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:23:00,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-02 17:23:00,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082680413] [2023-12-02 17:23:00,369 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:23:00,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 17:23:00,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:23:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 17:23:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 17:23:00,370 INFO L87 Difference]: Start difference. First operand 71567 states and 79067 transitions. Second operand has 14 states, 13 states have (on average 12.461538461538462) internal successors, (162), 14 states have internal predecessors, (162), 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 17:23:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:23:08,097 INFO L93 Difference]: Finished difference Result 101629 states and 112598 transitions. [2023-12-02 17:23:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 17:23:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 12.461538461538462) internal successors, (162), 14 states have internal predecessors, (162), 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 515 [2023-12-02 17:23:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:23:08,184 INFO L225 Difference]: With dead ends: 101629 [2023-12-02 17:23:08,184 INFO L226 Difference]: Without dead ends: 73228 [2023-12-02 17:23:08,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 945 SyntacticMatches, 58 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=277, Invalid=3145, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:23:08,207 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 181 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2697 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:23:08,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1120 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2697 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 17:23:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73228 states. [2023-12-02 17:23:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73228 to 70960. [2023-12-02 17:23:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70960 states, 66521 states have (on average 1.0450384089234979) internal successors, (69517), 66523 states have internal predecessors, (69517), 4433 states have call successors, (4433), 3 states have call predecessors, (4433), 3 states have return successors, (4433), 4433 states have call predecessors, (4433), 4433 states have call successors, (4433) [2023-12-02 17:23:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70960 states to 70960 states and 78383 transitions. [2023-12-02 17:23:14,862 INFO L78 Accepts]: Start accepts. Automaton has 70960 states and 78383 transitions. Word has length 515 [2023-12-02 17:23:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:23:14,863 INFO L495 AbstractCegarLoop]: Abstraction has 70960 states and 78383 transitions. [2023-12-02 17:23:14,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 12.461538461538462) internal successors, (162), 14 states have internal predecessors, (162), 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 17:23:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 70960 states and 78383 transitions. [2023-12-02 17:23:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 17:23:14,879 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:23:14,879 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 25, 25, 25, 25, 25, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:23:14,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-12-02 17:23:15,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:23:15,080 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:23:15,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:23:15,080 INFO L85 PathProgramCache]: Analyzing trace with hash 371994163, now seen corresponding path program 18 times [2023-12-02 17:23:15,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:23:15,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441454443] [2023-12-02 17:23:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:23:15,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:23:15,100 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:23:15,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857942070] [2023-12-02 17:23:15,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:23:15,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:23:15,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:23:15,101 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:23:15,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 17:23:15,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:23:15,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:23:15,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 17:23:15,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:23:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6590 backedges. 3687 proven. 1912 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2023-12-02 17:23:15,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:23:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6590 backedges. 3345 proven. 1912 refuted. 0 times theorem prover too weak. 1333 trivial. 0 not checked. [2023-12-02 17:23:16,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:23:16,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441454443] [2023-12-02 17:23:16,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:23:16,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857942070] [2023-12-02 17:23:16,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857942070] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:23:16,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86907825] [2023-12-02 17:23:16,325 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:23:16,325 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:23:16,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:23:16,325 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:23:16,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:23:17,060 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:23:17,071 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:23:17,180 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:23:22,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1461947#(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) (<= 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 17:23:22,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:23:22,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:23:22,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2023-12-02 17:23:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263815822] [2023-12-02 17:23:22,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:23:22,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 17:23:22,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:23:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 17:23:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:23:22,447 INFO L87 Difference]: Start difference. First operand 70960 states and 78383 transitions. Second operand has 31 states, 31 states have (on average 14.225806451612904) internal successors, (441), 31 states have internal predecessors, (441), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) [2023-12-02 17:23:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:23:32,856 INFO L93 Difference]: Finished difference Result 150647 states and 167246 transitions. [2023-12-02 17:23:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:23:32,857 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 14.225806451612904) internal successors, (441), 31 states have internal predecessors, (441), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) Word has length 515 [2023-12-02 17:23:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:23:33,011 INFO L225 Difference]: With dead ends: 150647 [2023-12-02 17:23:33,011 INFO L226 Difference]: Without dead ends: 112304 [2023-12-02 17:23:33,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1421 SyntacticMatches, 70 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5377 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=521, Invalid=3511, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 17:23:33,045 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 71 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:23:33,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1002 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:23:33,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112304 states. [2023-12-02 17:23:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112304 to 78910. [2023-12-02 17:23:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78910 states, 73976 states have (on average 1.0409457121228507) internal successors, (77005), 73978 states have internal predecessors, (77005), 4928 states have call successors, (4928), 3 states have call predecessors, (4928), 3 states have return successors, (4928), 4928 states have call predecessors, (4928), 4928 states have call successors, (4928) [2023-12-02 17:23:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78910 states to 78910 states and 86861 transitions. [2023-12-02 17:23:40,597 INFO L78 Accepts]: Start accepts. Automaton has 78910 states and 86861 transitions. Word has length 515 [2023-12-02 17:23:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:23:40,597 INFO L495 AbstractCegarLoop]: Abstraction has 78910 states and 86861 transitions. [2023-12-02 17:23:40,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 14.225806451612904) internal successors, (441), 31 states have internal predecessors, (441), 30 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 30 states have call predecessors, (32), 30 states have call successors, (32) [2023-12-02 17:23:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 78910 states and 86861 transitions. [2023-12-02 17:23:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 17:23:40,617 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:23:40,617 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 24, 24, 24, 24, 24, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:23:40,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-02 17:23:40,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:23:40,818 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:23:40,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:23:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash 212371069, now seen corresponding path program 19 times [2023-12-02 17:23:40,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:23:40,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890130327] [2023-12-02 17:23:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:23:40,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:23:40,839 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:23:40,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230241943] [2023-12-02 17:23:40,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:23:40,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:23:40,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:23:40,840 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:23:40,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-02 17:23:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:23:41,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 17:23:41,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:23:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 0 proven. 4812 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2023-12-02 17:23:42,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:23:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6506 backedges. 0 proven. 4812 refuted. 0 times theorem prover too weak. 1694 trivial. 0 not checked. [2023-12-02 17:23:43,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:23:43,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890130327] [2023-12-02 17:23:43,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:23:43,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230241943] [2023-12-02 17:23:43,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230241943] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:23:43,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710318030] [2023-12-02 17:23:43,949 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:23:43,949 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:23:43,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:23:43,950 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:23:43,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:23:44,687 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:23:44,697 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:23:44,715 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:23:51,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1723389#(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) (<= 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 17:23:51,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:23:51,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:23:51,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-02 17:23:51,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948892709] [2023-12-02 17:23:51,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:23:51,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 17:23:51,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:23:51,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 17:23:51,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2119, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 17:23:51,383 INFO L87 Difference]: Start difference. First operand 78910 states and 86861 transitions. Second operand has 26 states, 25 states have (on average 13.64) internal successors, (341), 26 states have internal predecessors, (341), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 17:24:02,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:24:02,918 INFO L93 Difference]: Finished difference Result 92273 states and 101635 transitions. [2023-12-02 17:24:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-02 17:24:02,919 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 13.64) internal successors, (341), 26 states have internal predecessors, (341), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 515 [2023-12-02 17:24:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:24:03,033 INFO L225 Difference]: With dead ends: 92273 [2023-12-02 17:24:03,033 INFO L226 Difference]: Without dead ends: 92272 [2023-12-02 17:24:03,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1601 GetRequests, 1436 SyntacticMatches, 60 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4896 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1791, Invalid=9551, Unknown=0, NotChecked=0, Total=11342 [2023-12-02 17:24:03,046 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 499 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 3131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:24:03,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 1167 Invalid, 3131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2967 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 17:24:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92272 states. [2023-12-02 17:24:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92272 to 85759. [2023-12-02 17:24:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85759 states, 80397 states have (on average 1.040673159446248) internal successors, (83667), 80399 states have internal predecessors, (83667), 5356 states have call successors, (5356), 3 states have call predecessors, (5356), 3 states have return successors, (5356), 5356 states have call predecessors, (5356), 5356 states have call successors, (5356) [2023-12-02 17:24:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85759 states to 85759 states and 94379 transitions. [2023-12-02 17:24:11,107 INFO L78 Accepts]: Start accepts. Automaton has 85759 states and 94379 transitions. Word has length 515 [2023-12-02 17:24:11,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:24:11,107 INFO L495 AbstractCegarLoop]: Abstraction has 85759 states and 94379 transitions. [2023-12-02 17:24:11,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 13.64) internal successors, (341), 26 states have internal predecessors, (341), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 17:24:11,107 INFO L276 IsEmpty]: Start isEmpty. Operand 85759 states and 94379 transitions. [2023-12-02 17:24:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2023-12-02 17:24:11,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:24:11,135 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:24:11,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-12-02 17:24:11,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:24:11,336 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:24:11,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:24:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash -632059295, now seen corresponding path program 20 times [2023-12-02 17:24:11,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:24:11,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186596562] [2023-12-02 17:24:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:11,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:24:11,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:24:11,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742550633] [2023-12-02 17:24:11,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:24:11,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:24:11,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:24:11,358 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:24:11,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 17:24:11,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2023-12-02 17:24:11,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:24:11,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-02 17:24:11,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6106 backedges. 1253 proven. 278 refuted. 0 times theorem prover too weak. 4575 trivial. 0 not checked. [2023-12-02 17:24:12,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:24:12,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:24:12,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186596562] [2023-12-02 17:24:12,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:24:12,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742550633] [2023-12-02 17:24:12,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742550633] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:24:12,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3589912] [2023-12-02 17:24:12,993 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:24:12,993 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:24:12,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:24:12,993 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:24:12,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:24:13,845 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:24:13,855 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:24:13,873 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:24:19,406 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1925440#(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) (<= 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 17:24:19,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:24:19,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:24:19,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 17:24:19,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574229624] [2023-12-02 17:24:19,407 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:24:19,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:24:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:24:19,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:24:19,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 17:24:19,408 INFO L87 Difference]: Start difference. First operand 85759 states and 94379 transitions. Second operand has 19 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 17:24:26,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:24:26,331 INFO L93 Difference]: Finished difference Result 119983 states and 132015 transitions. [2023-12-02 17:24:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:24:26,331 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 515 [2023-12-02 17:24:26,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:24:26,419 INFO L225 Difference]: With dead ends: 119983 [2023-12-02 17:24:26,419 INFO L226 Difference]: Without dead ends: 70831 [2023-12-02 17:24:26,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 928 SyntacticMatches, 70 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=382, Invalid=3040, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:24:26,442 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:24:26,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 147 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:24:26,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70831 states. [2023-12-02 17:24:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70831 to 70830. [2023-12-02 17:24:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70830 states, 66399 states have (on average 1.0406030211298363) internal successors, (69095), 66401 states have internal predecessors, (69095), 4425 states have call successors, (4425), 3 states have call predecessors, (4425), 3 states have return successors, (4425), 4425 states have call predecessors, (4425), 4425 states have call successors, (4425) [2023-12-02 17:24:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70830 states to 70830 states and 77945 transitions. [2023-12-02 17:24:32,922 INFO L78 Accepts]: Start accepts. Automaton has 70830 states and 77945 transitions. Word has length 515 [2023-12-02 17:24:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:24:32,922 INFO L495 AbstractCegarLoop]: Abstraction has 70830 states and 77945 transitions. [2023-12-02 17:24:32,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 17:24:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 70830 states and 77945 transitions. [2023-12-02 17:24:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2023-12-02 17:24:32,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:24:32,934 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 27, 27, 27, 27, 27, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:24:32,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 17:24:33,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:24:33,135 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:24:33,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:24:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2020269871, now seen corresponding path program 21 times [2023-12-02 17:24:33,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:24:33,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037435012] [2023-12-02 17:24:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:33,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:24:33,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:24:33,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700076892] [2023-12-02 17:24:33,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:24:33,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:24:33,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:24:33,155 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:24:33,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 17:24:33,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:24:33,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:24:33,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 17:24:33,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7181 backedges. 2755 proven. 3612 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2023-12-02 17:24:34,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:24:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7181 backedges. 2755 proven. 3612 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2023-12-02 17:24:35,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:24:35,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037435012] [2023-12-02 17:24:35,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:24:35,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700076892] [2023-12-02 17:24:35,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700076892] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:24:35,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [164618898] [2023-12-02 17:24:35,074 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:24:35,074 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:24:35,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:24:35,075 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:24:35,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:24:35,917 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:24:35,927 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:24:35,946 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:24:41,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2143424#(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) (<= 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 17:24:41,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:24:41,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:24:41,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 51 [2023-12-02 17:24:41,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807722542] [2023-12-02 17:24:41,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:24:41,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 17:24:41,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:24:41,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 17:24:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=4498, Unknown=0, NotChecked=0, Total=5402 [2023-12-02 17:24:41,820 INFO L87 Difference]: Start difference. First operand 70830 states and 77945 transitions. Second operand has 51 states, 51 states have (on average 14.0) internal successors, (714), 51 states have internal predecessors, (714), 48 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 48 states have call predecessors, (49), 48 states have call successors, (49) [2023-12-02 17:24:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:24:58,286 INFO L93 Difference]: Finished difference Result 185906 states and 206035 transitions. [2023-12-02 17:24:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-02 17:24:58,287 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 14.0) internal successors, (714), 51 states have internal predecessors, (714), 48 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 48 states have call predecessors, (49), 48 states have call successors, (49) Word has length 533 [2023-12-02 17:24:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:24:58,460 INFO L225 Difference]: With dead ends: 185906 [2023-12-02 17:24:58,460 INFO L226 Difference]: Without dead ends: 149065 [2023-12-02 17:24:58,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1635 GetRequests, 1454 SyntacticMatches, 71 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10288 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2137, Invalid=10295, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 17:24:58,483 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 401 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2566 SdHoareTripleChecker+Invalid, 4983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:24:58,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 2566 Invalid, 4983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 17:24:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149065 states. [2023-12-02 17:25:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149065 to 94019. [2023-12-02 17:25:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94019 states, 88142 states have (on average 1.0312677270767625) internal successors, (90898), 88144 states have internal predecessors, (90898), 5871 states have call successors, (5871), 3 states have call predecessors, (5871), 3 states have return successors, (5871), 5871 states have call predecessors, (5871), 5871 states have call successors, (5871) [2023-12-02 17:25:07,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94019 states to 94019 states and 102640 transitions. [2023-12-02 17:25:07,871 INFO L78 Accepts]: Start accepts. Automaton has 94019 states and 102640 transitions. Word has length 533 [2023-12-02 17:25:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:07,871 INFO L495 AbstractCegarLoop]: Abstraction has 94019 states and 102640 transitions. [2023-12-02 17:25:07,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 14.0) internal successors, (714), 51 states have internal predecessors, (714), 48 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 48 states have call predecessors, (49), 48 states have call successors, (49) [2023-12-02 17:25:07,872 INFO L276 IsEmpty]: Start isEmpty. Operand 94019 states and 102640 transitions. [2023-12-02 17:25:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-12-02 17:25:07,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:07,886 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 24, 24, 24, 24, 24, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:25:07,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-12-02 17:25:08,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:25:08,086 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:25:08,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:08,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1841017413, now seen corresponding path program 22 times [2023-12-02 17:25:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:25:08,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018357235] [2023-12-02 17:25:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:25:08,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:25:08,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413863537] [2023-12-02 17:25:08,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:25:08,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:25:08,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:25:08,107 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:25:08,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 17:25:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:08,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 17:25:08,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 0 proven. 6676 refuted. 0 times theorem prover too weak. 1582 trivial. 0 not checked. [2023-12-02 17:25:09,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8258 backedges. 0 proven. 6676 refuted. 0 times theorem prover too weak. 1582 trivial. 0 not checked. [2023-12-02 17:25:12,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:25:12,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018357235] [2023-12-02 17:25:12,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:25:12,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413863537] [2023-12-02 17:25:12,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413863537] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:25:12,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [479513716] [2023-12-02 17:25:12,548 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:25:12,549 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:25:12,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:25:12,549 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:25:12,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:25:13,498 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:25:13,509 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:25:13,527 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:25:20,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2461922#(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) (<= 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 17:25:20,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:25:20,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:25:20,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-12-02 17:25:20,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540923867] [2023-12-02 17:25:20,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:25:20,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 17:25:20,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:25:20,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 17:25:20,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:25:20,675 INFO L87 Difference]: Start difference. First operand 94019 states and 102640 transitions. Second operand has 28 states, 27 states have (on average 15.222222222222221) internal successors, (411), 28 states have internal predecessors, (411), 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 17:25:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:25:35,247 INFO L93 Difference]: Finished difference Result 122417 states and 133684 transitions. [2023-12-02 17:25:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-02 17:25:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 15.222222222222221) internal successors, (411), 28 states have internal predecessors, (411), 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 587 [2023-12-02 17:25:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:25:35,376 INFO L225 Difference]: With dead ends: 122417 [2023-12-02 17:25:35,377 INFO L226 Difference]: Without dead ends: 122416 [2023-12-02 17:25:35,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 1638 SyntacticMatches, 72 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1592, Invalid=8710, Unknown=0, NotChecked=0, Total=10302 [2023-12-02 17:25:35,388 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 404 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 3099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:25:35,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1397 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:25:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122416 states. [2023-12-02 17:25:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122416 to 118784. [2023-12-02 17:25:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118784 states, 111359 states have (on average 1.0307204626478328) internal successors, (114780), 111361 states have internal predecessors, (114780), 7419 states have call successors, (7419), 3 states have call predecessors, (7419), 3 states have return successors, (7419), 7419 states have call predecessors, (7419), 7419 states have call successors, (7419) [2023-12-02 17:25:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118784 states to 118784 states and 129618 transitions. [2023-12-02 17:25:46,895 INFO L78 Accepts]: Start accepts. Automaton has 118784 states and 129618 transitions. Word has length 587 [2023-12-02 17:25:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:46,896 INFO L495 AbstractCegarLoop]: Abstraction has 118784 states and 129618 transitions. [2023-12-02 17:25:46,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 15.222222222222221) internal successors, (411), 28 states have internal predecessors, (411), 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 17:25:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 118784 states and 129618 transitions. [2023-12-02 17:25:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2023-12-02 17:25:46,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:46,914 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 34, 34, 34, 34, 34, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:25:46,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 17:25:47,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-02 17:25:47,114 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:25:47,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:47,114 INFO L85 PathProgramCache]: Analyzing trace with hash 497912923, now seen corresponding path program 23 times [2023-12-02 17:25:47,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:25:47,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484246904] [2023-12-02 17:25:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:47,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:25:47,135 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:25:47,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519424663] [2023-12-02 17:25:47,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:25:47,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:25:47,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:25:47,137 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:25:47,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 17:25:48,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-02 17:25:48,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:25:48,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 17:25:48,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11693 backedges. 4478 proven. 875 refuted. 0 times theorem prover too weak. 6340 trivial. 0 not checked. [2023-12-02 17:25:48,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:48,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:25:48,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484246904] [2023-12-02 17:25:48,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:25:48,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519424663] [2023-12-02 17:25:48,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519424663] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:25:48,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [295739923] [2023-12-02 17:25:48,523 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:25:48,523 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:25:48,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:25:48,523 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:25:48,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:25:49,327 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:25:49,336 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:25:49,354 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:25:55,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2735508#(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) (<= 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 17:25:55,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:25:55,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:25:55,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-02 17:25:55,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604373888] [2023-12-02 17:25:55,965 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:25:55,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 17:25:55,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:25:55,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 17:25:55,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 17:25:55,967 INFO L87 Difference]: Start difference. First operand 118784 states and 129618 transitions. Second operand has 16 states, 15 states have (on average 13.0) internal successors, (195), 16 states have internal predecessors, (195), 12 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-12-02 17:26:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:09,663 INFO L93 Difference]: Finished difference Result 199958 states and 218578 transitions. [2023-12-02 17:26:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 17:26:09,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 13.0) internal successors, (195), 16 states have internal predecessors, (195), 12 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 677 [2023-12-02 17:26:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:09,803 INFO L225 Difference]: With dead ends: 199958 [2023-12-02 17:26:09,803 INFO L226 Difference]: Without dead ends: 118791 [2023-12-02 17:26:09,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1377 GetRequests, 1248 SyntacticMatches, 77 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:26:09,839 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 295 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:09,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1919 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:26:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118791 states. [2023-12-02 17:26:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118791 to 118784. [2023-12-02 17:26:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118784 states, 111359 states have (on average 1.0300469652205928) internal successors, (114705), 111361 states have internal predecessors, (114705), 7419 states have call successors, (7419), 3 states have call predecessors, (7419), 3 states have return successors, (7419), 7419 states have call predecessors, (7419), 7419 states have call successors, (7419) [2023-12-02 17:26:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118784 states to 118784 states and 129543 transitions. [2023-12-02 17:26:21,273 INFO L78 Accepts]: Start accepts. Automaton has 118784 states and 129543 transitions. Word has length 677 [2023-12-02 17:26:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:21,274 INFO L495 AbstractCegarLoop]: Abstraction has 118784 states and 129543 transitions. [2023-12-02 17:26:21,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 13.0) internal successors, (195), 16 states have internal predecessors, (195), 12 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2023-12-02 17:26:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 118784 states and 129543 transitions. [2023-12-02 17:26:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2023-12-02 17:26:21,292 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:21,293 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 36, 36, 36, 36, 36, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:26:21,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-12-02 17:26:21,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-02 17:26:21,493 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:26:21,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash 826231161, now seen corresponding path program 24 times [2023-12-02 17:26:21,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:21,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141490621] [2023-12-02 17:26:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:21,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:21,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:26:21,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437107564] [2023-12-02 17:26:21,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:26:21,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:21,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:21,515 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:21,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 17:26:21,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:26:21,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:26:21,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 17:26:21,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:26:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12482 backedges. 0 proven. 8410 refuted. 0 times theorem prover too weak. 4072 trivial. 0 not checked. [2023-12-02 17:26:23,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:26:23,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:26:23,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141490621] [2023-12-02 17:26:23,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:26:23,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437107564] [2023-12-02 17:26:23,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437107564] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:26:23,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289236297] [2023-12-02 17:26:23,477 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:26:23,477 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:26:23,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:26:23,477 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:26:23,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:26:24,408 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:26:24,419 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:26:24,437 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:26:33,312 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3096321#(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) (<= 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 17:26:33,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:26:33,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:26:33,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-02 17:26:33,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083904328] [2023-12-02 17:26:33,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:26:33,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:26:33,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:26:33,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:26:33,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2190, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 17:26:33,314 INFO L87 Difference]: Start difference. First operand 118784 states and 129543 transitions. Second operand has 24 states, 23 states have (on average 13.565217391304348) internal successors, (312), 24 states have internal predecessors, (312), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 17:26:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:26:45,987 INFO L93 Difference]: Finished difference Result 120301 states and 131210 transitions. [2023-12-02 17:26:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:26:45,987 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 13.565217391304348) internal successors, (312), 24 states have internal predecessors, (312), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 695 [2023-12-02 17:26:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:26:46,131 INFO L225 Difference]: With dead ends: 120301 [2023-12-02 17:26:46,131 INFO L226 Difference]: Without dead ends: 120300 [2023-12-02 17:26:46,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1402 GetRequests, 1276 SyntacticMatches, 78 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 17:26:46,148 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 49 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 6171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 6171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:26:46,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2299 Invalid, 6171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6171 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 17:26:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120300 states. [2023-12-02 17:26:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120300 to 119072. [2023-12-02 17:26:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119072 states, 111629 states have (on average 1.0299742898350788) internal successors, (114975), 111631 states have internal predecessors, (114975), 7437 states have call successors, (7437), 3 states have call predecessors, (7437), 3 states have return successors, (7437), 7437 states have call predecessors, (7437), 7437 states have call successors, (7437) [2023-12-02 17:26:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119072 states to 119072 states and 129849 transitions. [2023-12-02 17:26:58,596 INFO L78 Accepts]: Start accepts. Automaton has 119072 states and 129849 transitions. Word has length 695 [2023-12-02 17:26:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:26:58,597 INFO L495 AbstractCegarLoop]: Abstraction has 119072 states and 129849 transitions. [2023-12-02 17:26:58,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 13.565217391304348) internal successors, (312), 24 states have internal predecessors, (312), 21 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-12-02 17:26:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 119072 states and 129849 transitions. [2023-12-02 17:26:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2023-12-02 17:26:58,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:26:58,621 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:26:58,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-12-02 17:26:58,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-02 17:26:58,821 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:26:58,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:26:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1270239911, now seen corresponding path program 4 times [2023-12-02 17:26:58,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:26:58,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37562523] [2023-12-02 17:26:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:26:58,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:26:58,843 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:26:58,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125145072] [2023-12-02 17:26:58,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:26:58,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:26:58,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:26:58,845 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:26:58,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 17:26:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:26:59,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 17:26:59,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13264 backedges. 0 proven. 11780 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 17:27:00,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:27:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13264 backedges. 0 proven. 11780 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 17:27:02,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:02,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37562523] [2023-12-02 17:27:02,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:27:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125145072] [2023-12-02 17:27:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125145072] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:27:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315063982] [2023-12-02 17:27:02,028 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:27:02,028 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:27:02,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:27:02,028 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:27:02,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:27:02,603 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 17:27:02,611 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:27:02,629 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:27:04,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3369989#(and (<= 0 |ULTIMATE.start_main_~x1~0#1|) (<= |ULTIMATE.start_main_~y3~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~x2~0#1| 1) (= |ULTIMATE.start_main_~y2~0#1| 0) (<= |ULTIMATE.start_main_~x1~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_~y1~0#1|))' at error location [2023-12-02 17:27:04,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:27:04,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:27:04,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2023-12-02 17:27:04,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757435774] [2023-12-02 17:27:04,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:27:04,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-12-02 17:27:04,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:04,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-12-02 17:27:04,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3241, Invalid=6461, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 17:27:04,740 INFO L87 Difference]: Start difference. First operand 119072 states and 129849 transitions. Second operand has 80 states, 79 states have (on average 14.822784810126583) internal successors, (1171), 80 states have internal predecessors, (1171), 79 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 79 states have call predecessors, (80), 79 states have call successors, (80) [2023-12-02 17:27:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:24,289 INFO L93 Difference]: Finished difference Result 189587 states and 206969 transitions. [2023-12-02 17:27:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-02 17:27:24,290 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 14.822784810126583) internal successors, (1171), 80 states have internal predecessors, (1171), 79 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 79 states have call predecessors, (80), 79 states have call successors, (80) Word has length 708 [2023-12-02 17:27:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:24,496 INFO L225 Difference]: With dead ends: 189587 [2023-12-02 17:27:24,496 INFO L226 Difference]: Without dead ends: 189586 [2023-12-02 17:27:24,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2122 GetRequests, 2025 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3241, Invalid=6461, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 17:27:24,519 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1621 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:24,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1621 Valid, 1081 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 17:27:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189586 states. [2023-12-02 17:27:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189586 to 189432. [2023-12-02 17:27:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189432 states, 177589 states have (on average 1.030103215852333) internal successors, (182935), 177591 states have internal predecessors, (182935), 11837 states have call successors, (11837), 3 states have call predecessors, (11837), 3 states have return successors, (11837), 11837 states have call predecessors, (11837), 11837 states have call successors, (11837) [2023-12-02 17:27:43,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189432 states to 189432 states and 206609 transitions. [2023-12-02 17:27:43,345 INFO L78 Accepts]: Start accepts. Automaton has 189432 states and 206609 transitions. Word has length 708 [2023-12-02 17:27:43,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:43,346 INFO L495 AbstractCegarLoop]: Abstraction has 189432 states and 206609 transitions. [2023-12-02 17:27:43,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 14.822784810126583) internal successors, (1171), 80 states have internal predecessors, (1171), 79 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 79 states have call predecessors, (80), 79 states have call successors, (80) [2023-12-02 17:27:43,346 INFO L276 IsEmpty]: Start isEmpty. Operand 189432 states and 206609 transitions. [2023-12-02 17:27:43,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2023-12-02 17:27:43,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:43,366 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 37, 37, 37, 37, 37, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:27:43,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-12-02 17:27:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 17:27:43,567 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:27:43,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1076554911, now seen corresponding path program 25 times [2023-12-02 17:27:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:43,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005742819] [2023-12-02 17:27:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:43,588 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:27:43,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378909901] [2023-12-02 17:27:43,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:27:43,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:43,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:43,590 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:43,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 17:27:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:43,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 17:27:43,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13161 backedges. 3085 proven. 8592 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 17:27:45,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:27:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13161 backedges. 3085 proven. 8592 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-12-02 17:27:46,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:27:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005742819] [2023-12-02 17:27:46,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:27:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378909901] [2023-12-02 17:27:46,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378909901] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:27:46,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850815728] [2023-12-02 17:27:46,437 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:27:46,438 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:27:46,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:27:46,438 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:27:46,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:27:47,176 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:27:47,191 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:27:47,209 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:27:54,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3800756#(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) (<= 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 17:27:54,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:27:54,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:27:54,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 61 [2023-12-02 17:27:54,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121889610] [2023-12-02 17:27:54,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:27:54,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-02 17:27:54,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:27:54,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-02 17:27:54,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=5996, Unknown=0, NotChecked=0, Total=6972 [2023-12-02 17:27:54,645 INFO L87 Difference]: Start difference. First operand 189432 states and 206609 transitions. Second operand has 61 states, 61 states have (on average 14.360655737704919) internal successors, (876), 61 states have internal predecessors, (876), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) [2023-12-02 17:28:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:28:21,492 INFO L93 Difference]: Finished difference Result 349367 states and 382720 transitions. [2023-12-02 17:28:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 17:28:21,492 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 14.360655737704919) internal successors, (876), 61 states have internal predecessors, (876), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) Word has length 713 [2023-12-02 17:28:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:28:21,836 INFO L225 Difference]: With dead ends: 349367 [2023-12-02 17:28:21,837 INFO L226 Difference]: Without dead ends: 271972 [2023-12-02 17:28:21,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2157 GetRequests, 1954 SyntacticMatches, 101 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13642 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1626, Invalid=9086, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 17:28:21,896 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 88 mSDsluCounter, 2859 mSDsCounter, 0 mSdLazyCounter, 5679 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 5681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:28:21,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 3193 Invalid, 5681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5679 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 17:28:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271972 states. [2023-12-02 17:28:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271972 to 222301. [2023-12-02 17:28:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222301 states, 208406 states have (on average 1.026016525435928) internal successors, (213828), 208408 states have internal predecessors, (213828), 13889 states have call successors, (13889), 3 states have call predecessors, (13889), 3 states have return successors, (13889), 13889 states have call predecessors, (13889), 13889 states have call successors, (13889) [2023-12-02 17:28:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222301 states to 222301 states and 241606 transitions. [2023-12-02 17:28:45,105 INFO L78 Accepts]: Start accepts. Automaton has 222301 states and 241606 transitions. Word has length 713 [2023-12-02 17:28:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:28:45,106 INFO L495 AbstractCegarLoop]: Abstraction has 222301 states and 241606 transitions. [2023-12-02 17:28:45,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 14.360655737704919) internal successors, (876), 61 states have internal predecessors, (876), 59 states have call successors, (60), 1 states have call predecessors, (60), 1 states have return successors, (60), 59 states have call predecessors, (60), 59 states have call successors, (60) [2023-12-02 17:28:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 222301 states and 241606 transitions. [2023-12-02 17:28:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2023-12-02 17:28:45,125 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:28:45,126 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 36, 36, 36, 36, 36, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:28:45,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-02 17:28:45,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-12-02 17:28:45,326 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:28:45,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:28:45,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2042293931, now seen corresponding path program 26 times [2023-12-02 17:28:45,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:28:45,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371681476] [2023-12-02 17:28:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:28:45,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:28:45,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:28:45,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139829308] [2023-12-02 17:28:45,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:28:45,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:28:45,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:28:45,347 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:28:45,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 17:28:45,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-12-02 17:28:45,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:28:45,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 17:28:45,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:28:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13025 backedges. 5077 proven. 1050 refuted. 0 times theorem prover too weak. 6898 trivial. 0 not checked. [2023-12-02 17:28:45,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:28:46,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:28:46,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371681476] [2023-12-02 17:28:46,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:28:46,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139829308] [2023-12-02 17:28:46,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139829308] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:28:46,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930195536] [2023-12-02 17:28:46,125 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:28:46,125 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:28:46,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:28:46,125 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:28:46,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:28:47,077 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:28:47,088 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:28:47,106 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:28:54,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4446029#(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) (<= 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 17:28:54,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:28:54,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:28:54,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-02 17:28:54,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879573877] [2023-12-02 17:28:54,741 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:28:54,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:28:54,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:28:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:28:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 17:28:54,742 INFO L87 Difference]: Start difference. First operand 222301 states and 241606 transitions. Second operand has 17 states, 16 states have (on average 13.125) internal successors, (210), 17 states have internal predecessors, (210), 13 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-12-02 17:29:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:19,612 INFO L93 Difference]: Finished difference Result 385072 states and 418871 transitions. [2023-12-02 17:29:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 17:29:19,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 13.125) internal successors, (210), 17 states have internal predecessors, (210), 13 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 713 [2023-12-02 17:29:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:19,915 INFO L225 Difference]: With dead ends: 385072 [2023-12-02 17:29:19,915 INFO L226 Difference]: Without dead ends: 222308 [2023-12-02 17:29:19,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 1315 SyntacticMatches, 81 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 17:29:19,979 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 237 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 3650 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 3671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:19,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 2143 Invalid, 3671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3650 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 17:29:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222308 states. [2023-12-02 17:29:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222308 to 222301. [2023-12-02 17:29:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222301 states, 208406 states have (on average 1.0254647179063943) internal successors, (213713), 208408 states have internal predecessors, (213713), 13889 states have call successors, (13889), 3 states have call predecessors, (13889), 3 states have return successors, (13889), 13889 states have call predecessors, (13889), 13889 states have call successors, (13889) [2023-12-02 17:29:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222301 states to 222301 states and 241491 transitions. [2023-12-02 17:29:42,885 INFO L78 Accepts]: Start accepts. Automaton has 222301 states and 241491 transitions. Word has length 713 [2023-12-02 17:29:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:42,886 INFO L495 AbstractCegarLoop]: Abstraction has 222301 states and 241491 transitions. [2023-12-02 17:29:42,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 13.125) internal successors, (210), 17 states have internal predecessors, (210), 13 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2023-12-02 17:29:42,886 INFO L276 IsEmpty]: Start isEmpty. Operand 222301 states and 241491 transitions. [2023-12-02 17:29:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2023-12-02 17:29:42,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:42,917 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 38, 38, 38, 38, 38, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:29:42,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-12-02 17:29:43,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-12-02 17:29:43,117 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:29:43,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash -685247287, now seen corresponding path program 27 times [2023-12-02 17:29:43,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:43,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709092756] [2023-12-02 17:29:43,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:43,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:43,142 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:29:43,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005466519] [2023-12-02 17:29:43,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:29:43,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:29:43,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:29:43,144 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:29:43,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-02 17:29:43,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:29:43,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:29:43,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 17:29:43,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:29:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 0 proven. 9332 refuted. 0 times theorem prover too weak. 4526 trivial. 0 not checked. [2023-12-02 17:29:44,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:29:45,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709092756] [2023-12-02 17:29:45,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:29:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005466519] [2023-12-02 17:29:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005466519] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:29:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1606752773] [2023-12-02 17:29:45,097 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:29:45,097 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:29:45,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:29:45,098 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:29:45,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:29:46,576 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:29:46,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:29:46,619 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:29:54,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5131679#(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) (<= 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 17:29:54,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:29:54,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:29:54,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-02 17:29:54,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564314615] [2023-12-02 17:29:54,962 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:29:54,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:29:54,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:54,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:29:54,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2286, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 17:29:54,963 INFO L87 Difference]: Start difference. First operand 222301 states and 241491 transitions. Second operand has 25 states, 24 states have (on average 13.625) internal successors, (327), 25 states have internal predecessors, (327), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2023-12-02 17:30:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:16,708 INFO L93 Difference]: Finished difference Result 223816 states and 243154 transitions. [2023-12-02 17:30:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 17:30:16,708 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 13.625) internal successors, (327), 25 states have internal predecessors, (327), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 731 [2023-12-02 17:30:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:17,044 INFO L225 Difference]: With dead ends: 223816 [2023-12-02 17:30:17,045 INFO L226 Difference]: Without dead ends: 223815 [2023-12-02 17:30:17,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1474 GetRequests, 1343 SyntacticMatches, 82 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=172, Invalid=2378, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:30:17,086 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 50 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 6728 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 6728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:17,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2517 Invalid, 6728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6728 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 17:30:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223815 states. [2023-12-02 17:30:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223815 to 222605. [2023-12-02 17:30:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222605 states, 208691 states have (on average 1.0254299418757877) internal successors, (213998), 208693 states have internal predecessors, (213998), 13908 states have call successors, (13908), 3 states have call predecessors, (13908), 3 states have return successors, (13908), 13908 states have call predecessors, (13908), 13908 states have call successors, (13908) [2023-12-02 17:30:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222605 states to 222605 states and 241814 transitions. [2023-12-02 17:30:38,899 INFO L78 Accepts]: Start accepts. Automaton has 222605 states and 241814 transitions. Word has length 731 [2023-12-02 17:30:38,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:38,899 INFO L495 AbstractCegarLoop]: Abstraction has 222605 states and 241814 transitions. [2023-12-02 17:30:38,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 13.625) internal successors, (327), 25 states have internal predecessors, (327), 22 states have call successors, (23), 1 states have call predecessors, (23), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2023-12-02 17:30:38,900 INFO L276 IsEmpty]: Start isEmpty. Operand 222605 states and 241814 transitions. [2023-12-02 17:30:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2023-12-02 17:30:38,923 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:38,924 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 39, 39, 39, 39, 39, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:30:38,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-12-02 17:30:39,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-12-02 17:30:39,124 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-12-02 17:30:39,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash 342158001, now seen corresponding path program 28 times [2023-12-02 17:30:39,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:39,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676017039] [2023-12-02 17:30:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:39,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:39,157 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:30:39,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939394506] [2023-12-02 17:30:39,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:30:39,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:30:39,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:30:39,158 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:30:39,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc8ecb86-0088-40f6-adf5-ca7fbb6b2c3f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-02 17:30:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:39,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 17:30:39,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:30:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14573 backedges. 3407 proven. 9524 refuted. 0 times theorem prover too weak. 1642 trivial. 0 not checked. [2023-12-02 17:30:41,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:30:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14573 backedges. 3407 proven. 9524 refuted. 0 times theorem prover too weak. 1642 trivial. 0 not checked. [2023-12-02 17:30:42,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:42,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676017039] [2023-12-02 17:30:42,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:30:42,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939394506] [2023-12-02 17:30:42,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939394506] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:30:42,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1594202672] [2023-12-02 17:30:42,651 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 17:30:42,651 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:30:42,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:30:42,652 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:30:42,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:30:43,415 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-12-02 17:30:43,426 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-12-02 17:30:43,443 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:30:49,450 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5638517#(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) (<= 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 17:30:49,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:30:49,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:30:49,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 64 [2023-12-02 17:30:49,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232733822] [2023-12-02 17:30:49,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:30:49,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-02 17:30:49,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:49,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-02 17:30:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=6421, Unknown=0, NotChecked=0, Total=7482 [2023-12-02 17:30:49,454 INFO L87 Difference]: Start difference. First operand 222605 states and 241814 transitions. Second operand has 64 states, 64 states have (on average 14.390625) internal successors, (921), 64 states have internal predecessors, (921), 62 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 62 states have call predecessors, (63), 62 states have call successors, (63) [2023-12-02 17:31:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:19,259 INFO L93 Difference]: Finished difference Result 382310 states and 417483 transitions. [2023-12-02 17:31:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 17:31:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 14.390625) internal successors, (921), 64 states have internal predecessors, (921), 62 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 62 states have call predecessors, (63), 62 states have call successors, (63) Word has length 749 [2023-12-02 17:31:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:19,645 INFO L225 Difference]: With dead ends: 382310 [2023-12-02 17:31:19,645 INFO L226 Difference]: Without dead ends: 304915 [2023-12-02 17:31:19,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2266 GetRequests, 2097 SyntacticMatches, 63 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9693 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1775, Invalid=9781, Unknown=0, NotChecked=0, Total=11556 [2023-12-02 17:31:19,691 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 91 mSDsluCounter, 1923 mSDsCounter, 0 mSdLazyCounter, 3904 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2271 SdHoareTripleChecker+Invalid, 3906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:19,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 2271 Invalid, 3906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3904 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 17:31:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304915 states.