./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ --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 6f3643eb7577eb0ba12bcd7a7f20ec9e29deb69664963fe3575fff225cd03ad0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:13:33,349 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:13:33,430 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-19 04:13:33,437 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:13:33,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:13:33,467 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:13:33,468 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:13:33,469 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:13:33,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:13:33,470 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:13:33,471 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:13:33,471 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:13:33,472 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:13:33,472 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:13:33,473 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:13:33,473 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:13:33,474 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:13:33,475 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:13:33,475 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:13:33,476 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:13:33,476 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:13:33,477 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:13:33,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:13:33,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:13:33,479 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:13:33,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:13:33,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:13:33,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:13:33,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:13:33,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:13:33,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:13:33,482 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:13:33,483 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:13:33,483 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:13:33,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:13:33,484 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:13:33,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:13:33,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:13:33,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:13:33,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:13:33,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:13:33,487 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:13:33,488 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:13:33,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:13:33,489 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:13:33,489 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:13:33,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:13:33,490 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_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f3643eb7577eb0ba12bcd7a7f20ec9e29deb69664963fe3575fff225cd03ad0 [2023-11-19 04:13:33,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:13:33,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:13:33,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:13:33,779 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:13:33,779 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:13:33,780 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5.c [2023-11-19 04:13:37,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:13:37,299 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:13:37,300 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/sv-benchmarks/c/recursified_nla-digbench/recursified_ps5.c [2023-11-19 04:13:37,313 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/data/01cf8ccc0/94720654a5444474bd6be2e63b7cf426/FLAGbdb8c014d [2023-11-19 04:13:37,336 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/data/01cf8ccc0/94720654a5444474bd6be2e63b7cf426 [2023-11-19 04:13:37,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:13:37,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:13:37,350 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:13:37,350 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:13:37,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:13:37,360 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ade734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37, skipping insertion in model container [2023-11-19 04:13:37,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,389 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:13:37,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:13:37,647 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:13:37,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:13:37,688 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:13:37,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37 WrapperNode [2023-11-19 04:13:37,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:13:37,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:13:37,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:13:37,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:13:37,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,708 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,734 INFO L138 Inliner]: procedures = 16, calls = 79, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2023-11-19 04:13:37,735 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:13:37,736 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:13:37,736 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:13:37,736 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:13:37,746 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,746 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,751 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,751 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,759 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,778 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,782 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,786 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:13:37,787 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:13:37,787 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:13:37,787 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:13:37,788 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (1/1) ... [2023-11-19 04:13:37,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:13:37,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:37,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:13:37,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:13:37,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:13:37,872 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_33_0 [2023-11-19 04:13:37,872 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_33_0 [2023-11-19 04:13:37,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:13:37,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:13:37,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:13:37,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:13:37,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:13:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:13:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 04:13:37,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 04:13:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:13:37,979 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:13:37,982 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:13:38,791 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:13:38,821 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:13:38,821 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:13:38,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:13:38 BoogieIcfgContainer [2023-11-19 04:13:38,828 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:13:38,830 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:13:38,831 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:13:38,834 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:13:38,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:13:37" (1/3) ... [2023-11-19 04:13:38,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f74aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:13:38, skipping insertion in model container [2023-11-19 04:13:38,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:37" (2/3) ... [2023-11-19 04:13:38,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f74aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:13:38, skipping insertion in model container [2023-11-19 04:13:38,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:13:38" (3/3) ... [2023-11-19 04:13:38,868 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps5.c [2023-11-19 04:13:38,888 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:13:38,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 84 error locations. [2023-11-19 04:13:38,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:13:38,970 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;@37ef85ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:13:38,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 84 error locations. [2023-11-19 04:13:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 94 states have (on average 1.9148936170212767) internal successors, (180), 179 states have internal predecessors, (180), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 04:13:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 04:13:38,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:38,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 04:13:38,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:13:38,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash 237166248, now seen corresponding path program 1 times [2023-11-19 04:13:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:39,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160364060] [2023-11-19 04:13:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:39,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:39,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:39,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160364060] [2023-11-19 04:13:39,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160364060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:39,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:39,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:39,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386684156] [2023-11-19 04:13:39,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:39,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:13:39,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:13:39,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:13:39,773 INFO L87 Difference]: Start difference. First operand has 186 states, 94 states have (on average 1.9148936170212767) internal successors, (180), 179 states have internal predecessors, (180), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:40,322 INFO L93 Difference]: Finished difference Result 432 states and 442 transitions. [2023-11-19 04:13:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:13:40,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-19 04:13:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:40,336 INFO L225 Difference]: With dead ends: 432 [2023-11-19 04:13:40,336 INFO L226 Difference]: Without dead ends: 331 [2023-11-19 04:13:40,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:13:40,344 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 269 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:40,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 663 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:13:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-19 04:13:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 224. [2023-11-19 04:13:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 216 states have internal predecessors, (241), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 04:13:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 252 transitions. [2023-11-19 04:13:40,412 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 252 transitions. Word has length 5 [2023-11-19 04:13:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:40,413 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 252 transitions. [2023-11-19 04:13:40,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 252 transitions. [2023-11-19 04:13:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:13:40,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:40,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:40,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:13:40,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_25_to_33_0Err10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:13:40,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash 251167698, now seen corresponding path program 1 times [2023-11-19 04:13:40,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:40,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613329459] [2023-11-19 04:13:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:40,440 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:13:40,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142922189] [2023-11-19 04:13:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:40,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:40,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:40,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:40,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:13:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:40,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 04:13:40,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:40,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:40,735 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-11-19 04:13:40,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 114 [2023-11-19 04:13:40,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:40,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2023-11-19 04:13:40,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-19 04:13:40,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:13:41,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:13:41,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 04:13:41,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:41,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:41,311 INFO L349 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2023-11-19 04:13:41,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 72 [2023-11-19 04:13:41,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 04:13:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:41,504 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:41,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:41,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613329459] [2023-11-19 04:13:41,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:13:41,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142922189] [2023-11-19 04:13:41,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142922189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:41,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:41,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827215957] [2023-11-19 04:13:41,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:41,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:13:41,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:41,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:13:41,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:13:41,509 INFO L87 Difference]: Start difference. First operand 224 states and 252 transitions. Second operand has 6 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:41,898 INFO L93 Difference]: Finished difference Result 331 states and 335 transitions. [2023-11-19 04:13:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:13:41,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 04:13:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:41,903 INFO L225 Difference]: With dead ends: 331 [2023-11-19 04:13:41,903 INFO L226 Difference]: Without dead ends: 330 [2023-11-19 04:13:41,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:13:41,905 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 245 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:41,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 638 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:13:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-11-19 04:13:41,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 224. [2023-11-19 04:13:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.8181818181818181) internal successors, (240), 216 states have internal predecessors, (240), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 04:13:41,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 251 transitions. [2023-11-19 04:13:41,942 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 251 transitions. Word has length 15 [2023-11-19 04:13:41,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:41,942 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 251 transitions. [2023-11-19 04:13:41,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:41,943 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 251 transitions. [2023-11-19 04:13:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:13:41,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:41,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:41,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:13:42,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:42,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_25_to_33_0Err11ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:13:42,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:42,168 INFO L85 PathProgramCache]: Analyzing trace with hash -803735897, now seen corresponding path program 1 times [2023-11-19 04:13:42,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:42,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816308923] [2023-11-19 04:13:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:42,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:42,187 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:13:42,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716268403] [2023-11-19 04:13:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:42,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:42,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:42,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:42,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:13:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:42,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 04:13:42,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:42,329 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-11-19 04:13:42,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2023-11-19 04:13:42,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:42,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 75 [2023-11-19 04:13:42,375 INFO L349 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2023-11-19 04:13:42,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 36 [2023-11-19 04:13:42,445 INFO L349 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2023-11-19 04:13:42,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2023-11-19 04:13:42,450 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:13:42,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 04:13:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:42,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:42,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:42,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816308923] [2023-11-19 04:13:42,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:13:42,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716268403] [2023-11-19 04:13:42,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716268403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:42,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:42,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:42,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368988465] [2023-11-19 04:13:42,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:42,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:13:42,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:13:42,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:13:42,508 INFO L87 Difference]: Start difference. First operand 224 states and 251 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:43,001 INFO L93 Difference]: Finished difference Result 330 states and 334 transitions. [2023-11-19 04:13:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:13:43,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 04:13:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:43,004 INFO L225 Difference]: With dead ends: 330 [2023-11-19 04:13:43,004 INFO L226 Difference]: Without dead ends: 329 [2023-11-19 04:13:43,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:13:43,006 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 241 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:43,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 640 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:13:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-19 04:13:43,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 224. [2023-11-19 04:13:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.8106060606060606) internal successors, (239), 216 states have internal predecessors, (239), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 04:13:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 250 transitions. [2023-11-19 04:13:43,036 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 250 transitions. Word has length 16 [2023-11-19 04:13:43,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:43,036 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 250 transitions. [2023-11-19 04:13:43,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 250 transitions. [2023-11-19 04:13:43,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:13:43,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:43,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:43,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:13:43,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:43,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_25_to_33_0Err12ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:13:43,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:43,258 INFO L85 PathProgramCache]: Analyzing trace with hash 853991028, now seen corresponding path program 1 times [2023-11-19 04:13:43,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:43,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63747753] [2023-11-19 04:13:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:43,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:43,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:13:43,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713424667] [2023-11-19 04:13:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:43,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:43,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:43,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:43,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:13:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:43,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 04:13:43,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:43,456 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-11-19 04:13:43,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2023-11-19 04:13:43,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:43,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 75 [2023-11-19 04:13:43,503 INFO L349 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2023-11-19 04:13:43,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 36 [2023-11-19 04:13:43,555 INFO L349 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2023-11-19 04:13:43,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2023-11-19 04:13:43,559 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:13:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:43,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:43,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:43,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63747753] [2023-11-19 04:13:43,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:13:43,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713424667] [2023-11-19 04:13:43,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713424667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:43,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:43,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:13:43,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976261913] [2023-11-19 04:13:43,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:43,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:13:43,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:13:43,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:13:43,639 INFO L87 Difference]: Start difference. First operand 224 states and 250 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:44,001 INFO L93 Difference]: Finished difference Result 329 states and 333 transitions. [2023-11-19 04:13:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:13:44,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 04:13:44,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:44,004 INFO L225 Difference]: With dead ends: 329 [2023-11-19 04:13:44,004 INFO L226 Difference]: Without dead ends: 323 [2023-11-19 04:13:44,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:13:44,006 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 220 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:44,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 765 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:13:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-19 04:13:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 224. [2023-11-19 04:13:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.7651515151515151) internal successors, (233), 216 states have internal predecessors, (233), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 04:13:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 244 transitions. [2023-11-19 04:13:44,018 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 244 transitions. Word has length 17 [2023-11-19 04:13:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:44,018 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 244 transitions. [2023-11-19 04:13:44,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 244 transitions. [2023-11-19 04:13:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 04:13:44,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:44,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:44,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:13:44,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:44,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_25_to_33_0Err18ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:13:44,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:44,241 INFO L85 PathProgramCache]: Analyzing trace with hash -104255910, now seen corresponding path program 1 times [2023-11-19 04:13:44,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:44,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112161192] [2023-11-19 04:13:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:44,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:44,277 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:13:44,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551071850] [2023-11-19 04:13:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:44,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:44,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:44,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:44,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:13:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:44,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 04:13:44,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:44,431 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-11-19 04:13:44,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2023-11-19 04:13:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:44,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2023-11-19 04:13:44,483 INFO L349 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2023-11-19 04:13:44,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 36 [2023-11-19 04:13:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:44,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:44,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:44,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112161192] [2023-11-19 04:13:44,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:13:44,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551071850] [2023-11-19 04:13:44,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551071850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:44,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:44,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:13:44,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454783011] [2023-11-19 04:13:44,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:44,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:13:44,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:13:44,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:13:44,693 INFO L87 Difference]: Start difference. First operand 224 states and 244 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:45,078 INFO L93 Difference]: Finished difference Result 323 states and 327 transitions. [2023-11-19 04:13:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:13:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-19 04:13:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:45,081 INFO L225 Difference]: With dead ends: 323 [2023-11-19 04:13:45,081 INFO L226 Difference]: Without dead ends: 321 [2023-11-19 04:13:45,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:13:45,083 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 270 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:45,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 642 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:13:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-19 04:13:45,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 224. [2023-11-19 04:13:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.75) internal successors, (231), 216 states have internal predecessors, (231), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 04:13:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 242 transitions. [2023-11-19 04:13:45,093 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 242 transitions. Word has length 23 [2023-11-19 04:13:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:45,093 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 242 transitions. [2023-11-19 04:13:45,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 242 transitions. [2023-11-19 04:13:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 04:13:45,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:45,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:45,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:13:45,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:45,316 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_25_to_33_0Err20ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:13:45,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:45,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1405679364, now seen corresponding path program 1 times [2023-11-19 04:13:45,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:45,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986552948] [2023-11-19 04:13:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:45,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:45,335 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:13:45,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781297756] [2023-11-19 04:13:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:45,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:45,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:45,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:45,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:13:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:45,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:13:45,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:45,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-19 04:13:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:45,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:45,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:45,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986552948] [2023-11-19 04:13:45,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:13:45,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781297756] [2023-11-19 04:13:45,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781297756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:45,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:45,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:45,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851239077] [2023-11-19 04:13:45,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:45,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:13:45,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:45,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:13:45,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:13:45,487 INFO L87 Difference]: Start difference. First operand 224 states and 242 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:45,780 INFO L93 Difference]: Finished difference Result 226 states and 244 transitions. [2023-11-19 04:13:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:13:45,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-19 04:13:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:45,784 INFO L225 Difference]: With dead ends: 226 [2023-11-19 04:13:45,784 INFO L226 Difference]: Without dead ends: 225 [2023-11-19 04:13:45,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:13:45,785 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 118 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:45,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 463 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:13:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-19 04:13:45,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2023-11-19 04:13:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 133 states have (on average 1.7293233082706767) internal successors, (230), 216 states have internal predecessors, (230), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 04:13:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 242 transitions. [2023-11-19 04:13:45,799 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 242 transitions. Word has length 25 [2023-11-19 04:13:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:45,800 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 242 transitions. [2023-11-19 04:13:45,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 242 transitions. [2023-11-19 04:13:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:13:45,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:45,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:45,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:13:46,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:46,016 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_25_to_33_0Err21ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:13:46,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash -626387247, now seen corresponding path program 1 times [2023-11-19 04:13:46,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:46,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550894063] [2023-11-19 04:13:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:46,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:46,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:13:46,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871346591] [2023-11-19 04:13:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:46,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:46,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:46,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:46,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:13:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:46,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:13:46,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:46,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 04:13:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:46,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:46,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:46,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550894063] [2023-11-19 04:13:46,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:13:46,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871346591] [2023-11-19 04:13:46,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871346591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:46,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:46,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536490465] [2023-11-19 04:13:46,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:46,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:13:46,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:46,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:13:46,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:13:46,204 INFO L87 Difference]: Start difference. First operand 225 states and 242 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:46,451 INFO L93 Difference]: Finished difference Result 225 states and 242 transitions. [2023-11-19 04:13:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:13:46,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-19 04:13:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:46,453 INFO L225 Difference]: With dead ends: 225 [2023-11-19 04:13:46,453 INFO L226 Difference]: Without dead ends: 224 [2023-11-19 04:13:46,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:13:46,455 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 112 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:46,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 463 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:13:46,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-19 04:13:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2023-11-19 04:13:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 133 states have (on average 1.7142857142857142) internal successors, (228), 215 states have internal predecessors, (228), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 04:13:46,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 240 transitions. [2023-11-19 04:13:46,466 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 240 transitions. Word has length 26 [2023-11-19 04:13:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:46,467 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 240 transitions. [2023-11-19 04:13:46,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:13:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 240 transitions. [2023-11-19 04:13:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 04:13:46,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:46,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:46,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:13:46,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:46,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_25_to_33_0Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:13:46,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:46,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2056831902, now seen corresponding path program 1 times [2023-11-19 04:13:46,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:46,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816366069] [2023-11-19 04:13:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:46,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:46,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:13:46,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741387551] [2023-11-19 04:13:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:46,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:46,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:46,708 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:46,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:13:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:46,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 04:13:46,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:46,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:46,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:47,119 INFO L349 Elim1Store]: treesize reduction 236, result has 31.6 percent of original size [2023-11-19 04:13:47,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 130 treesize of output 349 [2023-11-19 04:13:47,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:13:47,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 369 treesize of output 367 [2023-11-19 04:13:47,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-11-19 04:13:47,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-19 04:13:47,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 04:13:48,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:48,278 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:13:48,295 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:13:48,297 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:13:48,314 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-11-19 04:13:48,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 62 [2023-11-19 04:13:48,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:48,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:13:48,613 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:13:48,629 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:13:48,630 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:13:48,654 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-11-19 04:13:48,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 62 [2023-11-19 04:13:54,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 155 [2023-11-19 04:13:54,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 155 [2023-11-19 04:13:54,576 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:13:54,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 113 [2023-11-19 04:13:54,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 155 [2023-11-19 04:13:54,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:55,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:55,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:55,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:55,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:55,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:55,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 120 [2023-11-19 04:13:56,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 155 [2023-11-19 04:13:56,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 155 [2023-11-19 04:13:56,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 155 [2023-11-19 04:13:56,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 120 [2023-11-19 04:13:56,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:56,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:57,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:57,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:57,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:57,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 99 [2023-11-19 04:13:58,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 221 [2023-11-19 04:13:59,127 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 04:13:59,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 155 [2023-11-19 04:13:59,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 192 [2023-11-19 04:13:59,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 155 [2023-11-19 04:13:59,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 192 [2023-11-19 04:14:00,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 168 [2023-11-19 04:14:00,218 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 04:14:00,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 192 [2023-11-19 04:14:00,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 155 [2023-11-19 04:14:00,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 192 [2023-11-19 04:14:01,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 155 [2023-11-19 04:14:02,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:02,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:02,482 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:02,483 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:02,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 72 [2023-11-19 04:14:02,513 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-19 04:14:02,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 74 [2023-11-19 04:14:02,534 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:02,538 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-19 04:14:02,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 7 [2023-11-19 04:14:04,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:04,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:04,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:04,206 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:04,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:04,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:04,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:04,215 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:04,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 154 [2023-11-19 04:14:04,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 04:14:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:10,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:14:10,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:10,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816366069] [2023-11-19 04:14:10,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:14:10,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741387551] [2023-11-19 04:14:10,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741387551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:10,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:10,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:14:10,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210940027] [2023-11-19 04:14:10,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:10,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:14:10,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:10,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:14:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:14:10,922 INFO L87 Difference]: Start difference. First operand 224 states and 240 transitions. Second operand has 6 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:11,254 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2023-11-19 04:14:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:14:11,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-19 04:14:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:11,258 INFO L225 Difference]: With dead ends: 319 [2023-11-19 04:14:11,258 INFO L226 Difference]: Without dead ends: 315 [2023-11-19 04:14:11,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:14:11,259 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 176 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:11,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 659 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:14:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-19 04:14:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2023-11-19 04:14:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 133 states have (on average 1.6842105263157894) internal successors, (224), 215 states have internal predecessors, (224), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 04:14:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 236 transitions. [2023-11-19 04:14:11,275 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 236 transitions. Word has length 27 [2023-11-19 04:14:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:11,276 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 236 transitions. [2023-11-19 04:14:11,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:11,277 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 236 transitions. [2023-11-19 04:14:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 04:14:11,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:11,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:11,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:14:11,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:11,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_25_to_33_0Err26ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:14:11,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 861395170, now seen corresponding path program 1 times [2023-11-19 04:14:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902866089] [2023-11-19 04:14:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:11,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:11,518 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:14:11,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196870121] [2023-11-19 04:14:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:11,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:11,521 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:11,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:14:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:11,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 04:14:11,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:11,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:11,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:11,726 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-11-19 04:14:11,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 114 [2023-11-19 04:14:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:11,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2023-11-19 04:14:11,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 04:14:11,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 04:14:11,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 04:14:11,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 04:14:11,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-11-19 04:14:11,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 04:14:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:12,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:14:12,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:12,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902866089] [2023-11-19 04:14:12,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:14:12,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196870121] [2023-11-19 04:14:12,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196870121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:12,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:12,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:14:12,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012133156] [2023-11-19 04:14:12,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:12,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:14:12,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:12,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:14:12,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:14:12,252 INFO L87 Difference]: Start difference. First operand 224 states and 236 transitions. Second operand has 8 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:12,643 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2023-11-19 04:14:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:14:12,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-19 04:14:12,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:12,646 INFO L225 Difference]: With dead ends: 315 [2023-11-19 04:14:12,646 INFO L226 Difference]: Without dead ends: 313 [2023-11-19 04:14:12,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:14:12,647 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 181 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:12,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 650 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:14:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-19 04:14:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 224. [2023-11-19 04:14:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 133 states have (on average 1.669172932330827) internal successors, (222), 215 states have internal predecessors, (222), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 04:14:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 234 transitions. [2023-11-19 04:14:12,661 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 234 transitions. Word has length 31 [2023-11-19 04:14:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:12,662 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 234 transitions. [2023-11-19 04:14:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 234 transitions. [2023-11-19 04:14:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 04:14:12,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:12,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:12,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-19 04:14:12,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:12,885 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_25_to_33_0Err28ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:14:12,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1127926908, now seen corresponding path program 1 times [2023-11-19 04:14:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:12,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692189033] [2023-11-19 04:14:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:12,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:12,902 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:14:12,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118073982] [2023-11-19 04:14:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:12,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:12,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:12,904 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:12,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 04:14:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:13,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:14:13,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:13,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2023-11-19 04:14:13,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 04:14:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 04:14:13,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2023-11-19 04:14:13,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 04:14:13,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 8 [2023-11-19 04:14:13,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 04:14:13,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 04:14:13,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 47 [2023-11-19 04:14:13,107 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:13,108 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:13,108 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:13,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-19 04:14:13,145 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 04:14:13,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2023-11-19 04:14:13,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 04:14:13,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 04:14:13,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-19 04:14:13,182 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:13,182 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:13,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 40 [2023-11-19 04:14:13,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-11-19 04:14:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 04:14:13,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-19 04:14:13,225 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 04:14:13,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:13,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 35 [2023-11-19 04:14:13,241 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 04:14:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:13,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:14:13,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692189033] [2023-11-19 04:14:13,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:14:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118073982] [2023-11-19 04:14:13,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118073982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:13,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:13,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:14:13,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338138315] [2023-11-19 04:14:13,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:13,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:14:13,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:14:13,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:14:13,321 INFO L87 Difference]: Start difference. First operand 224 states and 234 transitions. Second operand has 6 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:13,657 INFO L93 Difference]: Finished difference Result 313 states and 317 transitions. [2023-11-19 04:14:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:14:13,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-19 04:14:13,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:13,661 INFO L225 Difference]: With dead ends: 313 [2023-11-19 04:14:13,661 INFO L226 Difference]: Without dead ends: 312 [2023-11-19 04:14:13,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:14:13,663 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 155 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:13,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 671 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:14:13,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-19 04:14:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 224. [2023-11-19 04:14:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 133 states have (on average 1.6616541353383458) internal successors, (221), 215 states have internal predecessors, (221), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 04:14:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 233 transitions. [2023-11-19 04:14:13,677 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 233 transitions. Word has length 33 [2023-11-19 04:14:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:13,679 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 233 transitions. [2023-11-19 04:14:13,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 233 transitions. [2023-11-19 04:14:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:14:13,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:13,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:13,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 04:14:13,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:14:13,914 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_25_to_33_0Err29ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-19 04:14:13,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash -605995687, now seen corresponding path program 1 times [2023-11-19 04:14:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:13,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406597859] [2023-11-19 04:14:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:13,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:13,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:14:13,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124054684] [2023-11-19 04:14:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:13,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:13,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:13,944 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:13,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c7647d-4492-4b68-ba66-b5436174c753/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 04:14:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:14,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:14:14,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:14,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 04:14:15,441 INFO L349 Elim1Store]: treesize reduction 462, result has 29.0 percent of original size [2023-11-19 04:14:15,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 282 treesize of output 724 [2023-11-19 04:14:15,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 414 treesize of output 406 [2023-11-19 04:14:15,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-11-19 04:14:20,153 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-19 04:14:20,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2469 treesize of output 2505 [2023-11-19 04:14:22,308 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 04:14:22,453 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-19 04:14:22,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 3 [2023-11-19 04:14:22,472 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-19 04:14:22,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 3 [2023-11-19 04:14:22,534 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-11-19 04:14:22,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 3