./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 0e0057cc 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_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6f3643eb7577eb0ba12bcd7a7f20ec9e29deb69664963fe3575fff225cd03ad0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:14:57,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:14:57,998 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 15:14:58,002 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:14:58,003 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:14:58,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:14:58,025 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:14:58,025 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:14:58,026 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:14:58,026 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:14:58,027 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:14:58,028 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:14:58,028 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:14:58,028 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:14:58,029 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:14:58,029 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:14:58,030 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:14:58,030 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:14:58,031 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:14:58,031 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:14:58,032 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:14:58,033 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:14:58,033 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:14:58,034 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:14:58,034 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:14:58,035 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:14:58,035 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:14:58,035 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:14:58,036 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:14:58,036 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:14:58,036 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:14:58,037 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 15:14:58,037 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:14:58,038 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:14:58,038 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:14:58,038 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:14:58,038 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:14:58,038 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:14:58,039 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:14:58,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:14:58,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:14:58,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:14:58,040 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:14:58,040 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:14:58,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:14:58,040 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:14:58,040 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:14:58,040 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:14:58,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:14:58,041 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_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f3643eb7577eb0ba12bcd7a7f20ec9e29deb69664963fe3575fff225cd03ad0 [2023-12-02 15:14:58,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:14:58,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:14:58,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:14:58,286 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:14:58,286 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:14:58,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5.c [2023-12-02 15:15:01,062 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:15:01,225 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:15:01,226 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/sv-benchmarks/c/recursified_nla-digbench/recursified_ps5.c [2023-12-02 15:15:01,234 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/data/559d5792d/c51fb640f42942fd922c46dfafd30d0e/FLAG284bc4f2d [2023-12-02 15:15:01,247 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/data/559d5792d/c51fb640f42942fd922c46dfafd30d0e [2023-12-02 15:15:01,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:15:01,251 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:15:01,253 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:15:01,253 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:15:01,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:15:01,258 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,259 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c2872d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01, skipping insertion in model container [2023-12-02 15:15:01,259 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,279 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:15:01,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:15:01,432 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:15:01,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:15:01,469 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:15:01,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01 WrapperNode [2023-12-02 15:15:01,470 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:15:01,471 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:15:01,471 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:15:01,471 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:15:01,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,485 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,508 INFO L138 Inliner]: procedures = 16, calls = 79, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2023-12-02 15:15:01,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:15:01,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:15:01,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:15:01,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:15:01,518 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,522 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,523 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,530 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,540 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:15:01,541 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:15:01,541 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:15:01,541 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:15:01,542 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (1/1) ... [2023-12-02 15:15:01,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:15:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:01,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:15:01,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:15:01,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:15:01,604 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_33_0 [2023-12-02 15:15:01,604 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_33_0 [2023-12-02 15:15:01,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:15:01,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:15:01,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:15:01,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:15:01,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:15:01,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 15:15:01,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 15:15:01,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 15:15:01,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:15:01,677 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:15:01,679 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:15:02,200 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:15:02,232 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:15:02,232 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 15:15:02,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:15:02 BoogieIcfgContainer [2023-12-02 15:15:02,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:15:02,236 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:15:02,236 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:15:02,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:15:02,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:15:01" (1/3) ... [2023-12-02 15:15:02,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d45ec7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:15:02, skipping insertion in model container [2023-12-02 15:15:02,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:15:01" (2/3) ... [2023-12-02 15:15:02,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d45ec7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:15:02, skipping insertion in model container [2023-12-02 15:15:02,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:15:02" (3/3) ... [2023-12-02 15:15:02,241 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps5.c [2023-12-02 15:15:02,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:15:02,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 84 error locations. [2023-12-02 15:15:02,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:15:02,308 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;@2ae7e5c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:15:02,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 84 error locations. [2023-12-02 15:15:02,313 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) [2023-12-02 15:15:02,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 15:15:02,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:02,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 15:15:02,320 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)] === [2023-12-02 15:15:02,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash 236242727, now seen corresponding path program 1 times [2023-12-02 15:15:02,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:02,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429876590] [2023-12-02 15:15:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:02,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:02,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:02,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429876590] [2023-12-02 15:15:02,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429876590] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:02,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:02,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:15:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413853074] [2023-12-02 15:15:02,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:02,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:15:02,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:02,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:15:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:15:02,888 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) [2023-12-02 15:15:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:03,312 INFO L93 Difference]: Finished difference Result 432 states and 442 transitions. [2023-12-02 15:15:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:15:03,314 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 [2023-12-02 15:15:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:03,324 INFO L225 Difference]: With dead ends: 432 [2023-12-02 15:15:03,324 INFO L226 Difference]: Without dead ends: 331 [2023-12-02 15:15:03,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:15:03,331 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, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:03,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 663 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:15:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-12-02 15:15:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 224. [2023-12-02 15:15:03,378 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) [2023-12-02 15:15:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 252 transitions. [2023-12-02 15:15:03,383 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 252 transitions. Word has length 5 [2023-12-02 15:15:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:03,384 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 252 transitions. [2023-12-02 15:15:03,384 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) [2023-12-02 15:15:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 252 transitions. [2023-12-02 15:15:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 15:15:03,385 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:03,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:15:03,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:15:03,386 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)] === [2023-12-02 15:15:03,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1256384111, now seen corresponding path program 1 times [2023-12-02 15:15:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740113857] [2023-12-02 15:15:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:03,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:03,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672179422] [2023-12-02 15:15:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:03,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:03,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:03,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:03,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:15:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:03,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 15:15:03,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:03,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:05,093 INFO L349 Elim1Store]: treesize reduction 509, result has 32.8 percent of original size [2023-12-02 15:15:05,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 1530 treesize of output 1402 [2023-12-02 15:15:05,265 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 26 treesize of output 24 [2023-12-02 15:15:05,613 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 [2023-12-02 15:15:05,760 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 [2023-12-02 15:15:06,319 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:06,414 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:06,430 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:06,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:06,448 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:06,479 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:06,535 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:06,560 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:06,573 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:06,578 INFO L224 Elim1Store]: Index analysis took 286 ms [2023-12-02 15:15:06,652 INFO L349 Elim1Store]: treesize reduction 141, result has 5.4 percent of original size [2023-12-02 15:15:06,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 24 case distinctions, treesize of input 237 treesize of output 446 [2023-12-02 15:15:07,451 WARN L200 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:15:07,919 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:07,926 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:08,081 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:08,084 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:08,090 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:08,143 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:08,487 INFO L224 Elim1Store]: Index analysis took 762 ms [2023-12-02 15:15:08,669 INFO L349 Elim1Store]: treesize reduction 234, result has 9.7 percent of original size [2023-12-02 15:15:08,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 27 case distinctions, treesize of input 249 treesize of output 472 [2023-12-02 15:15:10,115 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 49 treesize of output 44 [2023-12-02 15:15:10,572 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 49 treesize of output 44 [2023-12-02 15:15:10,933 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 41 treesize of output 36 [2023-12-02 15:15:11,123 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 49 treesize of output 44 [2023-12-02 15:15:12,958 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 66 treesize of output 61 [2023-12-02 15:15:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,207 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,220 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,238 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,255 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,312 INFO L349 Elim1Store]: treesize reduction 96, result has 15.0 percent of original size [2023-12-02 15:15:13,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 18 case distinctions, treesize of input 330 treesize of output 384 [2023-12-02 15:15:13,711 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,737 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,741 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,746 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,752 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,762 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,772 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,780 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:13,807 INFO L349 Elim1Store]: treesize reduction 49, result has 14.0 percent of original size [2023-12-02 15:15:13,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 121 treesize of output 169 [2023-12-02 15:15:14,038 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,044 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,050 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,091 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,138 INFO L224 Elim1Store]: Index analysis took 111 ms [2023-12-02 15:15:14,222 INFO L349 Elim1Store]: treesize reduction 220, result has 7.2 percent of original size [2023-12-02 15:15:14,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 28 case distinctions, treesize of input 418 treesize of output 470 [2023-12-02 15:15:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:14,699 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,700 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,704 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,731 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,738 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,745 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,748 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,753 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,760 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,760 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,761 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 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 117 treesize of output 157 [2023-12-02 15:15:14,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:14,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:14,947 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:14,951 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,071 INFO L349 Elim1Store]: treesize reduction 169, result has 9.1 percent of original size [2023-12-02 15:15:15,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 22 case distinctions, treesize of input 543 treesize of output 549 [2023-12-02 15:15:15,377 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:15,392 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,447 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,491 INFO L349 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2023-12-02 15:15:15,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 14 case distinctions, treesize of input 267 treesize of output 275 [2023-12-02 15:15:15,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:15,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:15,662 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,671 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,696 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,704 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,713 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,733 INFO L349 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2023-12-02 15:15:15,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 122 treesize of output 122 [2023-12-02 15:15:15,804 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:15,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:15,808 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,813 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,815 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,816 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,819 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,819 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,822 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,826 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,829 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 162 treesize of output 156 [2023-12-02 15:15:15,968 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,970 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:15,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:15,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:15,987 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,991 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,993 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,993 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,997 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,998 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:15,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-12-02 15:15:16,107 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:16,118 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:16,159 INFO L349 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2023-12-02 15:15:16,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 328 treesize of output 285 [2023-12-02 15:15:16,707 INFO L349 Elim1Store]: treesize reduction 118, result has 12.6 percent of original size [2023-12-02 15:15:16,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 16 case distinctions, treesize of input 119 treesize of output 96 [2023-12-02 15:15:16,807 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:16,823 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:16,841 INFO L349 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2023-12-02 15:15:16,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 72 [2023-12-02 15:15:17,670 INFO L349 Elim1Store]: treesize reduction 36, result has 18.2 percent of original size [2023-12-02 15:15:17,670 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 29 [2023-12-02 15:15:21,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:15:21,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 2775 treesize of output 2911 [2023-12-02 15:15:21,329 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 380 treesize of output 378 [2023-12-02 15:15:23,024 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 11 treesize of output 7 [2023-12-02 15:15:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:23,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:23,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:23,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740113857] [2023-12-02 15:15:23,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:23,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672179422] [2023-12-02 15:15:23,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672179422] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:23,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:23,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:15:23,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360206463] [2023-12-02 15:15:23,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:23,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:15:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:15:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:15:23,056 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) [2023-12-02 15:15:23,128 WARN L876 $PredicateComparison]: unable to prove that (and (let ((.cse2 (select |c_#memory_int| |c_func_to_recursive_line_25_to_33_0_#in~y.base|))) (let ((.cse0 (= (select .cse2 0) 0))) (or (and .cse0 (exists ((v_DerPreprocessor_44 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse1 (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|))) (and (not (= |c_func_to_recursive_line_25_to_33_0_#in~y.base| |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse1 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_25) |c_func_to_recursive_line_25_to_33_0_#in~y.base| (store .cse1 0 0)) |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse1 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_44) |c_func_to_recursive_line_25_to_33_0_#in~y.base| .cse2) |ULTIMATE.start_main_~#x~0#1.base|)))))) (and (exists ((v_DerPreprocessor_32 (Array Int Int)) (v_DerPreprocessor_33 (Array Int Int)) (v_DerPreprocessor_22 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (let ((.cse4 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_32) |c_func_to_recursive_line_25_to_33_0_#in~y.base| v_DerPreprocessor_33) |ULTIMATE.start_main_~#x~0#1.base|))) (let ((.cse3 (store .cse4 0 0))) (and (= .cse3 v_DerPreprocessor_33) (= (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) .cse4) (not (= |c_func_to_recursive_line_25_to_33_0_#in~y.base| |ULTIMATE.start_main_~#x~0#1.base|)) (= (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_22) |c_func_to_recursive_line_25_to_33_0_#in~y.base| .cse3) |ULTIMATE.start_main_~#x~0#1.base|) .cse4))))) .cse0) (and (exists ((|ULTIMATE.start_main_~#x~0#1.base| Int)) (and (not (= |c_func_to_recursive_line_25_to_33_0_#in~y.base| |ULTIMATE.start_main_~#x~0#1.base|)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 0) 0))) .cse0) (exists ((|ULTIMATE.start_main_~#x~0#1.base| Int)) (and (not (= |c_func_to_recursive_line_25_to_33_0_#in~y.base| |ULTIMATE.start_main_~#x~0#1.base|)) (exists ((v_DerPreprocessor_41 (Array Int Int)) (|ULTIMATE.start_main_~#c~0#1.base| Int) (v_DerPreprocessor_42 (Array Int Int)) (v_DerPreprocessor_43 (Array Int Int)) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse7 (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|))) (let ((.cse9 (store (store (store |c_#memory_int| |c_func_to_recursive_line_25_to_33_0_#in~y.base| v_DerPreprocessor_41) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_42) |ULTIMATE.start_main_~#c~0#1.base| v_DerPreprocessor_43)) (.cse6 (store (store (store |c_#memory_int| |c_func_to_recursive_line_25_to_33_0_#in~y.base| v_DerPreprocessor_24) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_25) |ULTIMATE.start_main_~#c~0#1.base| (store .cse7 0 0)))) (let ((.cse8 (select .cse6 |c_func_to_recursive_line_25_to_33_0_#in~y.base|)) (.cse5 (select .cse9 |c_func_to_recursive_line_25_to_33_0_#in~y.base|))) (and (= .cse2 .cse5) (= (select .cse6 |ULTIMATE.start_main_~#x~0#1.base|) .cse7) (= .cse5 .cse8) (= (select v_DerPreprocessor_43 0) 0) (= v_DerPreprocessor_24 .cse8) (= (select .cse5 0) 0) (= .cse5 v_DerPreprocessor_41) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 0) 0) (= .cse7 (select .cse9 |ULTIMATE.start_main_~#x~0#1.base|))))))))) (and .cse0 (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int) (v_DerPreprocessor_21 (Array Int Int)) (v_DerPreprocessor_7 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int)) (v_DerPreprocessor_27 (Array Int Int)) (v_DerPreprocessor_28 (Array Int Int)) (v_DerPreprocessor_22 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (let ((.cse15 (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|))) (let ((.cse17 (store (store (store |c_#memory_int| |c_func_to_recursive_line_25_to_33_0_#in~y.base| v_DerPreprocessor_27) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_28) |ULTIMATE.start_main_~#c~0#1.base| .cse15))) (let ((.cse10 (select .cse17 |ULTIMATE.start_main_~#x~0#1.base|))) (let ((.cse16 (store (store (store |c_#memory_int| |c_func_to_recursive_line_25_to_33_0_#in~y.base| v_DerPreprocessor_21) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_22) |ULTIMATE.start_main_~#c~0#1.base| (store .cse10 0 0)))) (let ((.cse11 (select .cse17 |c_func_to_recursive_line_25_to_33_0_#in~y.base|)) (.cse13 (select .cse16 |c_func_to_recursive_line_25_to_33_0_#in~y.base|)) (.cse14 (store (store (store |c_#memory_int| |c_func_to_recursive_line_25_to_33_0_#in~y.base| v_DerPreprocessor_6) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_7) |ULTIMATE.start_main_~#c~0#1.base| .cse2)) (.cse12 (select .cse16 |ULTIMATE.start_main_~#x~0#1.base|))) (and (= v_DerPreprocessor_28 .cse10) (= (select .cse11 0) 0) (= .cse12 v_DerPreprocessor_22) (= v_DerPreprocessor_27 .cse11) (not (= |c_func_to_recursive_line_25_to_33_0_#in~y.base| |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse13 .cse11) (= .cse13 v_DerPreprocessor_21) (= (select .cse14 |ULTIMATE.start_main_~#x~0#1.base|) .cse10) (= .cse2 (select .cse14 |c_func_to_recursive_line_25_to_33_0_#in~y.base|)) (= .cse12 .cse10) (= (select .cse15 0) 0) (= (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) .cse10))))))))) (and (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (v_DerPreprocessor_22 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (let ((.cse18 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_39) |c_func_to_recursive_line_25_to_33_0_#in~y.base| v_DerPreprocessor_40) |ULTIMATE.start_main_~#x~0#1.base|))) (and (= (select v_DerPreprocessor_40 0) 0) (= (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) .cse18) (not (= |c_func_to_recursive_line_25_to_33_0_#in~y.base| |ULTIMATE.start_main_~#x~0#1.base|)) (= (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_22) |c_func_to_recursive_line_25_to_33_0_#in~y.base| (store .cse18 0 0)) |ULTIMATE.start_main_~#x~0#1.base|) .cse18)))) .cse0) (and (exists ((v_DerPreprocessor_30 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (v_prenex_36 (Array Int Int)) (v_DerPreprocessor_22 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (let ((.cse19 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_22) |c_func_to_recursive_line_25_to_33_0_#in~y.base| v_DerPreprocessor_21) |ULTIMATE.start_main_~#x~0#1.base|))) (and (= .cse19 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_30) |c_func_to_recursive_line_25_to_33_0_#in~y.base| .cse2) |ULTIMATE.start_main_~#x~0#1.base|)) (not (= |c_func_to_recursive_line_25_to_33_0_#in~y.base| |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse19 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_prenex_36) |c_func_to_recursive_line_25_to_33_0_#in~y.base| .cse19) |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse19 (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse2 .cse19) (= v_DerPreprocessor_21 (store .cse19 0 0))))) .cse0)))) (let ((.cse24 (select |c_#memory_int| c_func_to_recursive_line_25_to_33_0_~y.base))) (let ((.cse29 (= (select .cse24 0) 0))) (or (and (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int) (v_DerPreprocessor_21 (Array Int Int)) (v_DerPreprocessor_7 (Array Int Int)) (v_DerPreprocessor_6 (Array Int Int)) (v_DerPreprocessor_27 (Array Int Int)) (v_DerPreprocessor_28 (Array Int Int)) (v_DerPreprocessor_22 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (let ((.cse26 (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|))) (let ((.cse27 (store (store (store |c_#memory_int| c_func_to_recursive_line_25_to_33_0_~y.base v_DerPreprocessor_27) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_28) |ULTIMATE.start_main_~#c~0#1.base| .cse26))) (let ((.cse23 (select .cse27 |ULTIMATE.start_main_~#x~0#1.base|))) (let ((.cse28 (store (store (store |c_#memory_int| c_func_to_recursive_line_25_to_33_0_~y.base v_DerPreprocessor_21) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_22) |ULTIMATE.start_main_~#c~0#1.base| (store .cse23 0 0)))) (let ((.cse21 (select .cse28 c_func_to_recursive_line_25_to_33_0_~y.base)) (.cse22 (select .cse28 |ULTIMATE.start_main_~#x~0#1.base|)) (.cse25 (store (store (store |c_#memory_int| c_func_to_recursive_line_25_to_33_0_~y.base v_DerPreprocessor_6) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_7) |ULTIMATE.start_main_~#c~0#1.base| .cse24)) (.cse20 (select .cse27 c_func_to_recursive_line_25_to_33_0_~y.base))) (and (= .cse20 .cse21) (= .cse22 .cse23) (= .cse21 v_DerPreprocessor_21) (= .cse20 v_DerPreprocessor_27) (= (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) .cse23) (not (= c_func_to_recursive_line_25_to_33_0_~y.base |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse22 v_DerPreprocessor_22) (= v_DerPreprocessor_28 .cse23) (= .cse24 (select .cse25 c_func_to_recursive_line_25_to_33_0_~y.base)) (= (select .cse25 |ULTIMATE.start_main_~#x~0#1.base|) .cse23) (= (select .cse26 0) 0) (= (select .cse20 0) 0)))))))) .cse29) (and (exists ((v_DerPreprocessor_44 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse30 (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|))) (and (= (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_44) c_func_to_recursive_line_25_to_33_0_~y.base .cse24) |ULTIMATE.start_main_~#x~0#1.base|) .cse30) (= .cse30 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_25) c_func_to_recursive_line_25_to_33_0_~y.base (store .cse30 0 0)) |ULTIMATE.start_main_~#x~0#1.base|)) (not (= c_func_to_recursive_line_25_to_33_0_~y.base |ULTIMATE.start_main_~#x~0#1.base|))))) .cse29) (exists ((|ULTIMATE.start_main_~#x~0#1.base| Int)) (and (not (= c_func_to_recursive_line_25_to_33_0_~y.base |ULTIMATE.start_main_~#x~0#1.base|)) (exists ((v_DerPreprocessor_41 (Array Int Int)) (|ULTIMATE.start_main_~#c~0#1.base| Int) (v_DerPreprocessor_42 (Array Int Int)) (v_DerPreprocessor_43 (Array Int Int)) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse34 (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|))) (let ((.cse35 (store (store (store |c_#memory_int| c_func_to_recursive_line_25_to_33_0_~y.base v_DerPreprocessor_41) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_42) |ULTIMATE.start_main_~#c~0#1.base| v_DerPreprocessor_43)) (.cse33 (store (store (store |c_#memory_int| c_func_to_recursive_line_25_to_33_0_~y.base v_DerPreprocessor_24) |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_25) |ULTIMATE.start_main_~#c~0#1.base| (store .cse34 0 0)))) (let ((.cse32 (select .cse33 c_func_to_recursive_line_25_to_33_0_~y.base)) (.cse31 (select .cse35 c_func_to_recursive_line_25_to_33_0_~y.base))) (and (= v_DerPreprocessor_41 .cse31) (= (select .cse31 0) 0) (= v_DerPreprocessor_24 .cse32) (= .cse32 .cse31) (= (select v_DerPreprocessor_43 0) 0) (= .cse24 .cse31) (= (select .cse33 |ULTIMATE.start_main_~#x~0#1.base|) .cse34) (= .cse34 (select .cse35 |ULTIMATE.start_main_~#x~0#1.base|)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 0) 0)))))))) (and .cse29 (exists ((|ULTIMATE.start_main_~#x~0#1.base| Int)) (and (not (= c_func_to_recursive_line_25_to_33_0_~y.base |ULTIMATE.start_main_~#x~0#1.base|)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 0) 0)))) (and .cse29 (exists ((v_DerPreprocessor_30 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (v_prenex_36 (Array Int Int)) (v_DerPreprocessor_22 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (let ((.cse36 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_22) c_func_to_recursive_line_25_to_33_0_~y.base v_DerPreprocessor_21) |ULTIMATE.start_main_~#x~0#1.base|))) (and (= v_DerPreprocessor_21 (store .cse36 0 0)) (= (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) .cse36) (not (= c_func_to_recursive_line_25_to_33_0_~y.base |ULTIMATE.start_main_~#x~0#1.base|)) (= (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_prenex_36) c_func_to_recursive_line_25_to_33_0_~y.base .cse36) |ULTIMATE.start_main_~#x~0#1.base|) .cse36) (= .cse36 .cse24) (= (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_30) c_func_to_recursive_line_25_to_33_0_~y.base .cse24) |ULTIMATE.start_main_~#x~0#1.base|) .cse36))))) (and .cse29 (exists ((v_DerPreprocessor_32 (Array Int Int)) (v_DerPreprocessor_33 (Array Int Int)) (v_DerPreprocessor_22 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (let ((.cse37 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_32) c_func_to_recursive_line_25_to_33_0_~y.base v_DerPreprocessor_33) |ULTIMATE.start_main_~#x~0#1.base|))) (let ((.cse38 (store .cse37 0 0))) (and (= .cse37 (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse38 v_DerPreprocessor_33) (not (= c_func_to_recursive_line_25_to_33_0_~y.base |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse37 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_22) c_func_to_recursive_line_25_to_33_0_~y.base .cse38) |ULTIMATE.start_main_~#x~0#1.base|))))))) (and .cse29 (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (v_DerPreprocessor_22 (Array Int Int)) (|ULTIMATE.start_main_~#x~0#1.base| Int)) (let ((.cse39 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_39) c_func_to_recursive_line_25_to_33_0_~y.base v_DerPreprocessor_40) |ULTIMATE.start_main_~#x~0#1.base|))) (and (= (select v_DerPreprocessor_40 0) 0) (= (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base| v_DerPreprocessor_22) c_func_to_recursive_line_25_to_33_0_~y.base (store .cse39 0 0)) |ULTIMATE.start_main_~#x~0#1.base|) .cse39) (not (= c_func_to_recursive_line_25_to_33_0_~y.base |ULTIMATE.start_main_~#x~0#1.base|)) (= .cse39 (select |c_#memory_int| |ULTIMATE.start_main_~#x~0#1.base|))))))))) (= |c_func_to_recursive_line_25_to_33_0_#in~y.offset| 0) (= c_func_to_recursive_line_25_to_33_0_~y.offset 0)) is different from true [2023-12-02 15:15:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:24,454 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2023-12-02 15:15:24,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:15:24,455 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 [2023-12-02 15:15:24,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:24,458 INFO L225 Difference]: With dead ends: 248 [2023-12-02 15:15:24,458 INFO L226 Difference]: Without dead ends: 247 [2023-12-02 15:15:24,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=30, Unknown=1, NotChecked=10, Total=56 [2023-12-02 15:15:24,459 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 96 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:24,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 662 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 5 Unknown, 4 Unchecked, 1.2s Time] [2023-12-02 15:15:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-12-02 15:15:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 224. [2023-12-02 15:15:24,473 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) [2023-12-02 15:15:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 251 transitions. [2023-12-02 15:15:24,475 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 251 transitions. Word has length 15 [2023-12-02 15:15:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:24,475 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 251 transitions. [2023-12-02 15:15:24,475 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) [2023-12-02 15:15:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 251 transitions. [2023-12-02 15:15:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 15:15:24,476 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:24,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:15:24,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:15:24,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 15:15:24,677 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)] === [2023-12-02 15:15:24,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash -293201720, now seen corresponding path program 1 times [2023-12-02 15:15:24,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:24,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264639062] [2023-12-02 15:15:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:24,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:24,691 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:24,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583883134] [2023-12-02 15:15:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:24,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:24,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:24,693 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:24,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:15:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:24,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 15:15:24,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:24,801 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-12-02 15:15:24,802 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 15:15:24,843 INFO L349 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2023-12-02 15:15:24,843 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 0 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 22 [2023-12-02 15:15:24,868 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-12-02 15:15:24,868 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 15:15:24,890 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-12-02 15:15:24,890 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 15:15:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:25,270 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:25,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:25,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264639062] [2023-12-02 15:15:25,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:25,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583883134] [2023-12-02 15:15:25,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583883134] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:25,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:25,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:15:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623719829] [2023-12-02 15:15:25,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:25,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:15:25,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:15:25,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:15:25,273 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) [2023-12-02 15:15:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:25,754 INFO L93 Difference]: Finished difference Result 330 states and 334 transitions. [2023-12-02 15:15:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:15:25,755 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 [2023-12-02 15:15:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:25,757 INFO L225 Difference]: With dead ends: 330 [2023-12-02 15:15:25,757 INFO L226 Difference]: Without dead ends: 329 [2023-12-02 15:15:25,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:15:25,759 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 241 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-12-02 15:15:25,759 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] [2023-12-02 15:15:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-12-02 15:15:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 224. [2023-12-02 15:15:25,777 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) [2023-12-02 15:15:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 250 transitions. [2023-12-02 15:15:25,779 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 250 transitions. Word has length 16 [2023-12-02 15:15:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:25,779 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 250 transitions. [2023-12-02 15:15:25,780 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) [2023-12-02 15:15:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 250 transitions. [2023-12-02 15:15:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 15:15:25,780 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:25,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:15:25,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:15:25,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:25,984 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)] === [2023-12-02 15:15:25,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash -499318669, now seen corresponding path program 1 times [2023-12-02 15:15:25,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:25,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631451757] [2023-12-02 15:15:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:25,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:25,998 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:25,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786060] [2023-12-02 15:15:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:25,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:25,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:26,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:26,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:15:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:26,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 15:15:26,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:26,121 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-12-02 15:15:26,122 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 65 treesize of output 40 [2023-12-02 15:15:26,130 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 42 treesize of output 38 [2023-12-02 15:15:26,226 INFO L349 Elim1Store]: treesize reduction 133, result has 29.6 percent of original size [2023-12-02 15:15:26,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 59 treesize of output 119 [2023-12-02 15:15:26,248 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 [2023-12-02 15:15:26,261 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 [2023-12-02 15:15:26,297 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 0 case distinctions, treesize of input 14 treesize of output 11 [2023-12-02 15:15:26,429 INFO L349 Elim1Store]: treesize reduction 153, result has 26.1 percent of original size [2023-12-02 15:15:26,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 93 treesize of output 144 [2023-12-02 15:15:26,877 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-12-02 15:15:26,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 19 [2023-12-02 15:15:26,912 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 28 treesize of output 11 [2023-12-02 15:15:26,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:26,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 12 [2023-12-02 15:15:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:27,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:27,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631451757] [2023-12-02 15:15:27,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786060] [2023-12-02 15:15:27,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786060] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:27,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:27,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:15:27,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851478311] [2023-12-02 15:15:27,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:27,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:15:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:15:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:15:27,034 INFO L87 Difference]: Start difference. First operand 224 states and 250 transitions. Second operand has 6 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2023-12-02 15:15:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:27,257 INFO L93 Difference]: Finished difference Result 329 states and 333 transitions. [2023-12-02 15:15:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:15:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2023-12-02 15:15:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:27,259 INFO L225 Difference]: With dead ends: 329 [2023-12-02 15:15:27,259 INFO L226 Difference]: Without dead ends: 323 [2023-12-02 15:15:27,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:15:27,261 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 220 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:27,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 657 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:15:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-12-02 15:15:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 224. [2023-12-02 15:15:27,275 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) [2023-12-02 15:15:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 244 transitions. [2023-12-02 15:15:27,277 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 244 transitions. Word has length 17 [2023-12-02 15:15:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:27,277 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 244 transitions. [2023-12-02 15:15:27,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2023-12-02 15:15:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 244 transitions. [2023-12-02 15:15:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 15:15:27,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:27,279 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] [2023-12-02 15:15:27,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:15:27,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:27,484 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)] === [2023-12-02 15:15:27,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1349020391, now seen corresponding path program 1 times [2023-12-02 15:15:27,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:27,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956136330] [2023-12-02 15:15:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:27,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:27,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:27,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704952687] [2023-12-02 15:15:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:27,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:27,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:27,498 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:27,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:15:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:27,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 15:15:27,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,619 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 29 treesize of output 37 [2023-12-02 15:15:27,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,630 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 17 treesize of output 15 [2023-12-02 15:15:27,643 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 1 [2023-12-02 15:15:27,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,664 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 29 treesize of output 37 [2023-12-02 15:15:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,671 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 [2023-12-02 15:15:27,674 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 [2023-12-02 15:15:27,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,682 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 17 treesize of output 15 [2023-12-02 15:15:27,691 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 15:15:27,692 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 24 treesize of output 21 [2023-12-02 15:15:27,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,698 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 19 treesize of output 15 [2023-12-02 15:15:27,704 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 11 [2023-12-02 15:15:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,720 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 34 treesize of output 42 [2023-12-02 15:15:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 17 [2023-12-02 15:15:27,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:27,738 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 [2023-12-02 15:15:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:27,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:27,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:27,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956136330] [2023-12-02 15:15:27,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:27,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704952687] [2023-12-02 15:15:27,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704952687] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:27,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:27,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:15:27,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604904714] [2023-12-02 15:15:27,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:27,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:15:27,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:15:27,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:15:27,827 INFO L87 Difference]: Start difference. First operand 224 states and 244 transitions. Second operand has 7 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2023-12-02 15:15:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:28,196 INFO L93 Difference]: Finished difference Result 323 states and 327 transitions. [2023-12-02 15:15:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:15:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 5 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 [2023-12-02 15:15:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:28,198 INFO L225 Difference]: With dead ends: 323 [2023-12-02 15:15:28,198 INFO L226 Difference]: Without dead ends: 322 [2023-12-02 15:15:28,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:15:28,200 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 220 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:28,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 778 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:15:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-12-02 15:15:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 224. [2023-12-02 15:15:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.7575757575757576) internal successors, (232), 216 states have internal predecessors, (232), 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) [2023-12-02 15:15:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 243 transitions. [2023-12-02 15:15:28,213 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 243 transitions. Word has length 23 [2023-12-02 15:15:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:28,213 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 243 transitions. [2023-12-02 15:15:28,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2023-12-02 15:15:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 243 transitions. [2023-12-02 15:15:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 15:15:28,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:28,214 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] [2023-12-02 15:15:28,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 15:15:28,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:28,415 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_25_to_33_0Err19ASSERT_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)] === [2023-12-02 15:15:28,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:28,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1130040912, now seen corresponding path program 1 times [2023-12-02 15:15:28,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:28,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765792029] [2023-12-02 15:15:28,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:28,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:28,427 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:28,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500616788] [2023-12-02 15:15:28,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:28,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:28,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:28,429 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:28,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:15:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:28,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 15:15:28,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:28,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:28,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:28,571 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-12-02 15:15:28,572 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 [2023-12-02 15:15:28,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:28,583 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 [2023-12-02 15:15:28,591 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 [2023-12-02 15:15:28,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:28,680 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 [2023-12-02 15:15:28,689 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 [2023-12-02 15:15:28,703 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 [2023-12-02 15:15:28,771 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:15:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:28,825 INFO L349 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2023-12-02 15:15:28,825 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 89 [2023-12-02 15:15:28,832 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 [2023-12-02 15:15:28,840 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 26 treesize of output 24 [2023-12-02 15:15:28,859 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 [2023-12-02 15:15:28,869 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 [2023-12-02 15:15:28,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 11 [2023-12-02 15:15:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:29,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:29,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:29,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765792029] [2023-12-02 15:15:29,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:29,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500616788] [2023-12-02 15:15:29,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500616788] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:29,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:29,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 15:15:29,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670124520] [2023-12-02 15:15:29,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:29,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 15:15:29,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:29,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 15:15:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:15:29,334 INFO L87 Difference]: Start difference. First operand 224 states and 243 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) [2023-12-02 15:15:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:30,438 INFO L93 Difference]: Finished difference Result 322 states and 326 transitions. [2023-12-02 15:15:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:15:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 24 [2023-12-02 15:15:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:30,440 INFO L225 Difference]: With dead ends: 322 [2023-12-02 15:15:30,440 INFO L226 Difference]: Without dead ends: 321 [2023-12-02 15:15:30,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2023-12-02 15:15:30,441 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 203 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:30,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 739 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 15:15:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-12-02 15:15:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 224. [2023-12-02 15:15:30,449 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) [2023-12-02 15:15:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 242 transitions. [2023-12-02 15:15:30,451 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 242 transitions. Word has length 24 [2023-12-02 15:15:30,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:30,451 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 242 transitions. [2023-12-02 15:15:30,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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) [2023-12-02 15:15:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 242 transitions. [2023-12-02 15:15:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 15:15:30,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:30,452 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] [2023-12-02 15:15:30,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 15:15:30,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 15:15:30,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === 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)] === [2023-12-02 15:15:30,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash 671529979, now seen corresponding path program 1 times [2023-12-02 15:15:30,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:30,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364720669] [2023-12-02 15:15:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:30,665 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:30,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080104116] [2023-12-02 15:15:30,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:30,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:30,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:30,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:30,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 15:15:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:30,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:15:30,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:30,758 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 [2023-12-02 15:15:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:30,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:30,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:30,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364720669] [2023-12-02 15:15:30,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:30,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080104116] [2023-12-02 15:15:30,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080104116] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:30,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:30,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:15:30,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305060501] [2023-12-02 15:15:30,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:30,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:15:30,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:30,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:15:30,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:15:30,764 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) [2023-12-02 15:15:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:30,938 INFO L93 Difference]: Finished difference Result 226 states and 244 transitions. [2023-12-02 15:15:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:15:30,939 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 [2023-12-02 15:15:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:30,941 INFO L225 Difference]: With dead ends: 226 [2023-12-02 15:15:30,941 INFO L226 Difference]: Without dead ends: 225 [2023-12-02 15:15:30,941 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 [2023-12-02 15:15:30,942 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 118 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:30,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 463 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:15:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-12-02 15:15:30,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2023-12-02 15:15:30,950 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) [2023-12-02 15:15:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 242 transitions. [2023-12-02 15:15:30,951 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 242 transitions. Word has length 25 [2023-12-02 15:15:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:30,951 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 242 transitions. [2023-12-02 15:15:30,952 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) [2023-12-02 15:15:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 242 transitions. [2023-12-02 15:15:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:15:30,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:30,952 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] [2023-12-02 15:15:30,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 15:15:31,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:31,153 INFO L420 AbstractCegarLoop]: === Iteration 8 === 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)] === [2023-12-02 15:15:31,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:31,153 INFO L85 PathProgramCache]: Analyzing trace with hash -657407054, now seen corresponding path program 1 times [2023-12-02 15:15:31,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:31,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751572979] [2023-12-02 15:15:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:31,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:31,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:31,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145084693] [2023-12-02 15:15:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:31,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:31,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:31,167 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:31,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:15:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:31,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:15:31,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:31,264 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 [2023-12-02 15:15:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:31,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:31,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751572979] [2023-12-02 15:15:31,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145084693] [2023-12-02 15:15:31,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145084693] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:31,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:31,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:15:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597390807] [2023-12-02 15:15:31,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:31,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:15:31,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:15:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:15:31,274 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) [2023-12-02 15:15:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:31,502 INFO L93 Difference]: Finished difference Result 225 states and 242 transitions. [2023-12-02 15:15:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:15:31,503 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 [2023-12-02 15:15:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:31,504 INFO L225 Difference]: With dead ends: 225 [2023-12-02 15:15:31,504 INFO L226 Difference]: Without dead ends: 224 [2023-12-02 15:15:31,505 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 [2023-12-02 15:15:31,506 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 [2023-12-02 15:15:31,506 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] [2023-12-02 15:15:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-12-02 15:15:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2023-12-02 15:15:31,517 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) [2023-12-02 15:15:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 240 transitions. [2023-12-02 15:15:31,519 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 240 transitions. Word has length 26 [2023-12-02 15:15:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:31,520 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 240 transitions. [2023-12-02 15:15:31,520 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) [2023-12-02 15:15:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 240 transitions. [2023-12-02 15:15:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 15:15:31,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:31,521 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] [2023-12-02 15:15:31,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 15:15:31,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 15:15:31,721 INFO L420 AbstractCegarLoop]: === Iteration 9 === 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)] === [2023-12-02 15:15:31,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1095217885, now seen corresponding path program 1 times [2023-12-02 15:15:31,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:31,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748519878] [2023-12-02 15:15:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:31,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:31,733 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344812558] [2023-12-02 15:15:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:31,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:31,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:31,734 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:31,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 15:15:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:31,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:15:31,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:31,827 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 [2023-12-02 15:15:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:31,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:31,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:31,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748519878] [2023-12-02 15:15:31,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:31,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344812558] [2023-12-02 15:15:31,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344812558] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:31,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:31,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:15:31,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718093242] [2023-12-02 15:15:31,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:31,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:15:31,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:31,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:15:31,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:15:31,835 INFO L87 Difference]: Start difference. First operand 224 states and 240 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 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) [2023-12-02 15:15:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:31,990 INFO L93 Difference]: Finished difference Result 224 states and 240 transitions. [2023-12-02 15:15:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:15:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 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 [2023-12-02 15:15:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:31,992 INFO L225 Difference]: With dead ends: 224 [2023-12-02 15:15:31,992 INFO L226 Difference]: Without dead ends: 222 [2023-12-02 15:15:31,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:15:31,993 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 89 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:31,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 577 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:15:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-12-02 15:15:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2023-12-02 15:15:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 133 states have (on average 1.6917293233082706) internal successors, (225), 213 states have internal predecessors, (225), 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) [2023-12-02 15:15:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 237 transitions. [2023-12-02 15:15:32,006 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 237 transitions. Word has length 27 [2023-12-02 15:15:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:32,007 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 237 transitions. [2023-12-02 15:15:32,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 6 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) [2023-12-02 15:15:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 237 transitions. [2023-12-02 15:15:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 15:15:32,008 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:32,008 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] [2023-12-02 15:15:32,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 15:15:32,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 15:15:32,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_25_to_33_0Err23ASSERT_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)] === [2023-12-02 15:15:32,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash -407983852, now seen corresponding path program 1 times [2023-12-02 15:15:32,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:32,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257345999] [2023-12-02 15:15:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:32,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:32,220 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:32,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714749284] [2023-12-02 15:15:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:32,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:32,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:32,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:32,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 15:15:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:32,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:15:32,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:32,344 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 28 treesize of output 12 [2023-12-02 15:15:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:32,357 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:32,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:32,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257345999] [2023-12-02 15:15:32,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:32,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714749284] [2023-12-02 15:15:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714749284] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:32,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:32,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:15:32,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236341127] [2023-12-02 15:15:32,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:32,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:15:32,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:15:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:15:32,359 INFO L87 Difference]: Start difference. First operand 222 states and 237 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-12-02 15:15:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:32,564 INFO L93 Difference]: Finished difference Result 222 states and 237 transitions. [2023-12-02 15:15:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:15:32,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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 28 [2023-12-02 15:15:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:32,566 INFO L225 Difference]: With dead ends: 222 [2023-12-02 15:15:32,566 INFO L226 Difference]: Without dead ends: 221 [2023-12-02 15:15:32,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:15:32,567 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 158 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:32,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 468 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:15:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-12-02 15:15:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-12-02 15:15:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 133 states have (on average 1.6766917293233083) internal successors, (223), 212 states have internal predecessors, (223), 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) [2023-12-02 15:15:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 235 transitions. [2023-12-02 15:15:32,580 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 235 transitions. Word has length 28 [2023-12-02 15:15:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:32,580 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 235 transitions. [2023-12-02 15:15:32,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 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) [2023-12-02 15:15:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 235 transitions. [2023-12-02 15:15:32,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 15:15:32,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:32,581 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] [2023-12-02 15:15:32,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 15:15:32,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 15:15:32,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_25_to_33_0Err24ASSERT_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)] === [2023-12-02 15:15:32,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:32,782 INFO L85 PathProgramCache]: Analyzing trace with hash 237402559, now seen corresponding path program 1 times [2023-12-02 15:15:32,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:32,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016265886] [2023-12-02 15:15:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:32,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:32,793 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:32,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112197912] [2023-12-02 15:15:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:32,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:32,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:32,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:32,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:15:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:32,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 15:15:32,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:32,957 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 42 treesize of output 18 [2023-12-02 15:15:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:32,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:32,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:32,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016265886] [2023-12-02 15:15:32,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:32,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112197912] [2023-12-02 15:15:32,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112197912] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:32,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:32,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:15:32,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343013374] [2023-12-02 15:15:32,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:32,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:15:32,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:32,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:15:32,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:15:32,976 INFO L87 Difference]: Start difference. First operand 221 states and 235 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-12-02 15:15:33,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:33,271 INFO L93 Difference]: Finished difference Result 221 states and 235 transitions. [2023-12-02 15:15:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:15:33,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 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 29 [2023-12-02 15:15:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:33,273 INFO L225 Difference]: With dead ends: 221 [2023-12-02 15:15:33,273 INFO L226 Difference]: Without dead ends: 220 [2023-12-02 15:15:33,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:15:33,275 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 160 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:33,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 568 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:15:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-12-02 15:15:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2023-12-02 15:15:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 133 states have (on average 1.6616541353383458) internal successors, (221), 211 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) [2023-12-02 15:15:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 233 transitions. [2023-12-02 15:15:33,284 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 233 transitions. Word has length 29 [2023-12-02 15:15:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:33,285 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 233 transitions. [2023-12-02 15:15:33,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-12-02 15:15:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 233 transitions. [2023-12-02 15:15:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 15:15:33,285 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:33,286 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] [2023-12-02 15:15:33,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 15:15:33,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 15:15:33,486 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_25_to_33_0Err25ASSERT_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)] === [2023-12-02 15:15:33,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1230455178, now seen corresponding path program 1 times [2023-12-02 15:15:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:33,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421884919] [2023-12-02 15:15:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:33,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:33,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:33,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352829074] [2023-12-02 15:15:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:33,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:33,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:33,498 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:33,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 15:15:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:33,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 15:15:33,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:33,664 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 40 treesize of output 16 [2023-12-02 15:15:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:33,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:33,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:33,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421884919] [2023-12-02 15:15:33,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:33,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352829074] [2023-12-02 15:15:33,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352829074] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:33,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:33,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:15:33,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877178275] [2023-12-02 15:15:33,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:33,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:15:33,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:33,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:15:33,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:15:33,687 INFO L87 Difference]: Start difference. First operand 220 states and 233 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 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) [2023-12-02 15:15:33,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:33,982 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2023-12-02 15:15:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:15:33,982 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 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 30 [2023-12-02 15:15:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:33,984 INFO L225 Difference]: With dead ends: 220 [2023-12-02 15:15:33,984 INFO L226 Difference]: Without dead ends: 219 [2023-12-02 15:15:33,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:15:33,985 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 135 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:33,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 663 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:15:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-02 15:15:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-12-02 15:15:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 133 states have (on average 1.6466165413533835) internal successors, (219), 210 states have internal predecessors, (219), 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) [2023-12-02 15:15:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 231 transitions. [2023-12-02 15:15:33,997 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 231 transitions. Word has length 30 [2023-12-02 15:15:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:33,998 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 231 transitions. [2023-12-02 15:15:33,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 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) [2023-12-02 15:15:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 231 transitions. [2023-12-02 15:15:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 15:15:33,998 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:33,999 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] [2023-12-02 15:15:34,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 15:15:34,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 15:15:34,199 INFO L420 AbstractCegarLoop]: === Iteration 13 === 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)] === [2023-12-02 15:15:34,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash 510595233, now seen corresponding path program 1 times [2023-12-02 15:15:34,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:34,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982590414] [2023-12-02 15:15:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:34,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:34,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:34,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56556957] [2023-12-02 15:15:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:34,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:34,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:34,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:34,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 15:15:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:34,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 15:15:34,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:34,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:34,377 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-12-02 15:15:34,377 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 [2023-12-02 15:15:34,395 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 [2023-12-02 15:15:34,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:34,406 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 [2023-12-02 15:15:34,482 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 [2023-12-02 15:15:34,511 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 [2023-12-02 15:15:34,524 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 [2023-12-02 15:15:34,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:34,569 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:15:34,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 40 [2023-12-02 15:15:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:34,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:34,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:34,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982590414] [2023-12-02 15:15:34,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:34,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56556957] [2023-12-02 15:15:34,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56556957] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:34,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:34,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:15:34,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991791771] [2023-12-02 15:15:34,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:34,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:15:34,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:34,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:15:34,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:15:34,893 INFO L87 Difference]: Start difference. First operand 219 states and 231 transitions. Second operand has 7 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2023-12-02 15:15:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:35,526 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2023-12-02 15:15:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:15:35,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 6.0) internal successors, (30), 5 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 [2023-12-02 15:15:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:35,528 INFO L225 Difference]: With dead ends: 310 [2023-12-02 15:15:35,529 INFO L226 Difference]: Without dead ends: 309 [2023-12-02 15:15:35,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:15:35,530 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 167 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:35,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 705 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:15:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-12-02 15:15:35,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 219. [2023-12-02 15:15:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 133 states have (on average 1.6390977443609023) internal successors, (218), 210 states have internal predecessors, (218), 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) [2023-12-02 15:15:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 230 transitions. [2023-12-02 15:15:35,544 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 230 transitions. Word has length 31 [2023-12-02 15:15:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:35,544 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 230 transitions. [2023-12-02 15:15:35,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2023-12-02 15:15:35,544 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 230 transitions. [2023-12-02 15:15:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 15:15:35,545 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:35,545 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] [2023-12-02 15:15:35,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 15:15:35,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 15:15:35,746 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting func_to_recursive_line_25_to_33_0Err27ASSERT_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)] === [2023-12-02 15:15:35,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:35,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1351416872, now seen corresponding path program 1 times [2023-12-02 15:15:35,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:35,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202075579] [2023-12-02 15:15:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:35,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:35,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:35,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036064555] [2023-12-02 15:15:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:35,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:35,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:35,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:35,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 15:15:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:35,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 15:15:35,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:15:35,859 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-12-02 15:15:35,859 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 65 treesize of output 40 [2023-12-02 15:15:35,865 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 26 treesize of output 24 [2023-12-02 15:15:35,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:15:35,943 INFO L349 Elim1Store]: treesize reduction 137, result has 27.5 percent of original size [2023-12-02 15:15:35,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 59 treesize of output 115 [2023-12-02 15:15:35,972 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 [2023-12-02 15:15:35,982 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 [2023-12-02 15:15:36,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 12 [2023-12-02 15:15:37,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:15:37,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 205 [2023-12-02 15:15:37,478 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 69 treesize of output 67 [2023-12-02 15:15:37,608 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 16 treesize of output 10 [2023-12-02 15:15:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:15:37,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:15:37,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:15:37,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202075579] [2023-12-02 15:15:37,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:15:37,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036064555] [2023-12-02 15:15:37,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036064555] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:15:37,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:15:37,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:15:37,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284069308] [2023-12-02 15:15:37,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:15:37,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:15:37,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:15:37,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:15:37,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:15:37,647 INFO L87 Difference]: Start difference. First operand 219 states and 230 transitions. Second operand has 8 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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) [2023-12-02 15:15:37,680 WARN L876 $PredicateComparison]: unable to prove that (and (let ((.cse1 (select |c_#memory_int| c_func_to_recursive_line_25_to_33_0_~y.base))) (let ((.cse0 (= (select .cse1 0) 0))) (or (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int) (v_DerPreprocessor_66 (Array Int Int))) (and (= (select v_DerPreprocessor_66 0) 0) (not (= c_func_to_recursive_line_25_to_33_0_~y.base |ULTIMATE.start_main_~#c~0#1.base|)) (= 0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base| v_DerPreprocessor_66) c_func_to_recursive_line_25_to_33_0_~y.base) 0)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 0) 0))) (and .cse0 (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int)) (and (not (= c_func_to_recursive_line_25_to_33_0_~y.base |ULTIMATE.start_main_~#c~0#1.base|)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 0) 0)))) (and .cse0 (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int)) (= (store .cse1 0 0) (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|)))) (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int) (v_DerPreprocessor_65 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base| v_DerPreprocessor_65) c_func_to_recursive_line_25_to_33_0_~y.base))) (and (= (store .cse2 0 0) v_DerPreprocessor_65) (= 0 (select .cse2 0)) (not (= c_func_to_recursive_line_25_to_33_0_~y.base |ULTIMATE.start_main_~#c~0#1.base|)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 0) 0))))))) (let ((.cse4 (select |c_#memory_int| |c_func_to_recursive_line_25_to_33_0_#in~y.base|))) (let ((.cse3 (= (select .cse4 0) 0))) (or (and (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int)) (and (not (= |c_func_to_recursive_line_25_to_33_0_#in~y.base| |ULTIMATE.start_main_~#c~0#1.base|)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 0) 0))) .cse3) (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int) (v_DerPreprocessor_66 (Array Int Int))) (and (not (= |c_func_to_recursive_line_25_to_33_0_#in~y.base| |ULTIMATE.start_main_~#c~0#1.base|)) (= (select v_DerPreprocessor_66 0) 0) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base| v_DerPreprocessor_66) |c_func_to_recursive_line_25_to_33_0_#in~y.base|) 0) 0) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 0) 0))) (and (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int)) (= (store .cse4 0 0) (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|))) .cse3) (exists ((|ULTIMATE.start_main_~#c~0#1.base| Int) (v_DerPreprocessor_65 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base| v_DerPreprocessor_65) |c_func_to_recursive_line_25_to_33_0_#in~y.base|))) (and (not (= |c_func_to_recursive_line_25_to_33_0_#in~y.base| |ULTIMATE.start_main_~#c~0#1.base|)) (= v_DerPreprocessor_65 (store .cse5 0 0)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) 0) 0) (= (select .cse5 0) 0))))))) (= |c_func_to_recursive_line_25_to_33_0_#in~y.offset| 0) (= c_func_to_recursive_line_25_to_33_0_~y.offset 0)) is different from true [2023-12-02 15:15:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:15:38,371 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2023-12-02 15:15:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:15:38,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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 32 [2023-12-02 15:15:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:15:38,373 INFO L225 Difference]: With dead ends: 230 [2023-12-02 15:15:38,373 INFO L226 Difference]: Without dead ends: 229 [2023-12-02 15:15:38,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=51, Unknown=1, NotChecked=14, Total=90 [2023-12-02 15:15:38,374 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 78 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:15:38,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 616 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 289 Invalid, 0 Unknown, 6 Unchecked, 0.7s Time] [2023-12-02 15:15:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-12-02 15:15:38,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 219. [2023-12-02 15:15:38,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 133 states have (on average 1.631578947368421) internal successors, (217), 210 states have internal predecessors, (217), 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) [2023-12-02 15:15:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 229 transitions. [2023-12-02 15:15:38,387 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 229 transitions. Word has length 32 [2023-12-02 15:15:38,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:15:38,388 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 229 transitions. [2023-12-02 15:15:38,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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) [2023-12-02 15:15:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 229 transitions. [2023-12-02 15:15:38,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 15:15:38,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:15:38,388 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] [2023-12-02 15:15:38,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 15:15:38,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 15:15:38,589 INFO L420 AbstractCegarLoop]: === Iteration 15 === 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)] === [2023-12-02 15:15:38,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:15:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1055750019, now seen corresponding path program 1 times [2023-12-02 15:15:38,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:15:38,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946674634] [2023-12-02 15:15:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:38,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:15:38,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:15:38,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257242433] [2023-12-02 15:15:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:15:38,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:15:38,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:15:38,602 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:15:38,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4096b079-77ce-40a9-9bcd-c7a06f669283/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 15:15:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:15:38,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 15:15:38,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:16:08,180 WARN L293 SmtUtils]: Spent 29.47s on a formula simplification. DAG size of input: 357 DAG size of output: 179 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 15:16:08,180 INFO L349 Elim1Store]: treesize reduction 1391, result has 30.6 percent of original size [2023-12-02 15:16:08,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 15 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 18 new quantified variables, introduced 78 case distinctions, treesize of input 8950 treesize of output 6473 [2023-12-02 15:16:10,930 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 33 treesize of output 29 [2023-12-02 15:16:23,313 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 33 treesize of output 29 [2023-12-02 15:16:23,684 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 33 treesize of output 29