./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_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91 --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 [2023-11-25 00:02:17,049 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:02:17,214 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-25 00:02:17,226 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:02:17,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:02:17,274 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:02:17,275 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:02:17,276 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:02:17,277 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:02:17,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:02:17,283 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:02:17,283 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:02:17,284 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:02:17,286 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:02:17,287 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:02:17,287 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:02:17,287 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:02:17,288 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:02:17,288 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:02:17,289 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:02:17,289 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:02:17,290 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:02:17,291 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:02:17,292 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:02:17,292 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:02:17,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:02:17,293 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:02:17,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:02:17,294 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:02:17,295 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:02:17,296 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:02:17,297 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-25 00:02:17,297 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:02:17,297 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:02:17,298 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:02:17,298 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:02:17,298 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:02:17,298 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:02:17,299 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:02:17,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:17,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:02:17,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:02:17,300 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:02:17,300 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:02:17,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:02:17,301 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:02:17,302 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:02:17,302 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:02:17,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:02:17,302 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_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f3643eb7577eb0ba12bcd7a7f20ec9e29deb69664963fe3575fff225cd03ad0 [2023-11-25 00:02:17,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:02:17,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:02:17,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:02:17,675 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:02:17,676 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:02:17,677 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps5.c [2023-11-25 00:02:20,828 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:02:21,119 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:02:21,120 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/sv-benchmarks/c/recursified_nla-digbench/recursified_ps5.c [2023-11-25 00:02:21,130 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/data/b6eef6378/8a2d07a12a924fe48b9de926e353932c/FLAG4dfab183a [2023-11-25 00:02:21,153 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/data/b6eef6378/8a2d07a12a924fe48b9de926e353932c [2023-11-25 00:02:21,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:02:21,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:02:21,166 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:21,166 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:02:21,173 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:02:21,174 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,175 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5a9c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21, skipping insertion in model container [2023-11-25 00:02:21,176 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,203 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:02:21,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:21,428 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:02:21,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:02:21,483 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:02:21,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21 WrapperNode [2023-11-25 00:02:21,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:02:21,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:21,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:02:21,486 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:02:21,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,504 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,549 INFO L138 Inliner]: procedures = 16, calls = 79, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2023-11-25 00:02:21,550 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:02:21,551 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:02:21,551 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:02:21,551 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:02:21,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,571 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,585 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,595 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,598 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,603 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:02:21,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:02:21,604 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:02:21,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:02:21,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (1/1) ... [2023-11-25 00:02:21,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:02:21,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:21,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:02:21,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:02:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:02:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_33_0 [2023-11-25 00:02:21,726 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_33_0 [2023-11-25 00:02:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:02:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:02:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:02:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:02:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:02:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:02:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:02:21,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:02:21,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:02:21,846 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:02:21,848 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:02:22,614 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:02:22,673 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:02:22,682 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:02:22,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:22 BoogieIcfgContainer [2023-11-25 00:02:22,707 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:02:22,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:02:22,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:02:22,713 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:02:22,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:02:21" (1/3) ... [2023-11-25 00:02:22,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8363e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:22, skipping insertion in model container [2023-11-25 00:02:22,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:02:21" (2/3) ... [2023-11-25 00:02:22,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f8363e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:02:22, skipping insertion in model container [2023-11-25 00:02:22,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:02:22" (3/3) ... [2023-11-25 00:02:22,729 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps5.c [2023-11-25 00:02:22,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:02:22,774 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 84 error locations. [2023-11-25 00:02:22,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:02:22,903 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;@6364af90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:02:22,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 84 error locations. [2023-11-25 00:02:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 94 states have (on average 1.9148936170212767) internal successors, (180), 179 states have internal predecessors, (180), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-25 00:02:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-25 00:02:22,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:22,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-25 00:02:22,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-25 00:02:22,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash 236242727, now seen corresponding path program 1 times [2023-11-25 00:02:22,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:22,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244887753] [2023-11-25 00:02:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:22,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:23,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:23,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244887753] [2023-11-25 00:02:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244887753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:23,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:23,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:02:23,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136163862] [2023-11-25 00:02:23,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:23,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:02:23,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:02:23,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:23,773 INFO L87 Difference]: Start difference. First operand has 186 states, 94 states have (on average 1.9148936170212767) internal successors, (180), 179 states have internal predecessors, (180), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:24,418 INFO L93 Difference]: Finished difference Result 432 states and 442 transitions. [2023-11-25 00:02:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:02:24,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-25 00:02:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:24,446 INFO L225 Difference]: With dead ends: 432 [2023-11-25 00:02:24,446 INFO L226 Difference]: Without dead ends: 331 [2023-11-25 00:02:24,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:02:24,459 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 269 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:24,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 663 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:02:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-25 00:02:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 224. [2023-11-25 00:02:24,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 216 states have internal predecessors, (241), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-25 00:02:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 252 transitions. [2023-11-25 00:02:24,537 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 252 transitions. Word has length 5 [2023-11-25 00:02:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:24,538 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 252 transitions. [2023-11-25 00:02:24,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 252 transitions. [2023-11-25 00:02:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-25 00:02:24,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:24,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:24,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:02:24,541 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_25_to_33_0Err10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-25 00:02:24,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:24,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1256384111, now seen corresponding path program 1 times [2023-11-25 00:02:24,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:24,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997758342] [2023-11-25 00:02:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:24,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:24,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:02:24,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391154394] [2023-11-25 00:02:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:24,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:24,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:24,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:02:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:24,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-25 00:02:24,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:24,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:26,714 INFO L349 Elim1Store]: treesize reduction 509, result has 32.8 percent of original size [2023-11-25 00:02:26,716 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 [2023-11-25 00:02:26,965 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 [2023-11-25 00:02:27,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-25 00:02:27,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-25 00:02:28,129 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:28,270 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:28,293 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:28,297 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:28,322 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:28,371 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:28,467 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:28,506 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:28,524 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:28,532 INFO L224 Elim1Store]: Index analysis took 426 ms [2023-11-25 00:02:28,623 INFO L349 Elim1Store]: treesize reduction 141, result has 5.4 percent of original size [2023-11-25 00:02:28,623 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 [2023-11-25 00:02:29,616 WARN L200 Elim1Store]: Array PQE input equivalent to false [2023-11-25 00:02:30,235 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:30,246 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:30,345 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:30,476 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:30,486 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:30,575 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:31,020 INFO L224 Elim1Store]: Index analysis took 1088 ms [2023-11-25 00:02:31,285 INFO L349 Elim1Store]: treesize reduction 234, result has 9.7 percent of original size [2023-11-25 00:02:31,285 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 [2023-11-25 00:02:33,157 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 [2023-11-25 00:02:33,752 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 [2023-11-25 00:02:34,190 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 [2023-11-25 00:02:34,421 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 [2023-11-25 00:02:36,643 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 66 treesize of output 61 [2023-11-25 00:02:36,878 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:36,921 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:36,936 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:36,963 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:36,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:36,989 INFO L224 Elim1Store]: Index analysis took 115 ms [2023-11-25 00:02:37,053 INFO L349 Elim1Store]: treesize reduction 96, result has 15.0 percent of original size [2023-11-25 00:02:37,054 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 [2023-11-25 00:02:37,569 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:37,602 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:37,608 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:37,615 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:37,622 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:37,639 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:37,652 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:37,663 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:37,695 INFO L349 Elim1Store]: treesize reduction 49, result has 14.0 percent of original size [2023-11-25 00:02:37,695 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 [2023-11-25 00:02:38,004 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,013 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,020 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,074 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,137 INFO L224 Elim1Store]: Index analysis took 146 ms [2023-11-25 00:02:38,260 INFO L349 Elim1Store]: treesize reduction 220, result has 7.2 percent of original size [2023-11-25 00:02:38,261 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 [2023-11-25 00:02:38,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:38,892 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,893 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,898 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,924 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,932 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,943 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,947 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,954 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,955 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,956 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:38,965 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 [2023-11-25 00:02:39,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:39,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:39,209 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:39,215 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:39,383 INFO L349 Elim1Store]: treesize reduction 169, result has 9.1 percent of original size [2023-11-25 00:02:39,384 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 [2023-11-25 00:02:39,734 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:39,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:39,753 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:39,801 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:39,826 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:39,886 INFO L349 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2023-11-25 00:02:39,886 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 [2023-11-25 00:02:40,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:40,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:40,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:40,114 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,126 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,159 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,166 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,170 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,183 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,210 INFO L349 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2023-11-25 00:02:40,210 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 [2023-11-25 00:02:40,297 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:40,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:40,303 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,314 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,318 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,324 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,325 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,328 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,335 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,339 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,341 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 [2023-11-25 00:02:40,511 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,515 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:40,536 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,543 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,545 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,546 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,552 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,553 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,555 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 [2023-11-25 00:02:40,666 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,681 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:40,734 INFO L349 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2023-11-25 00:02:40,735 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 [2023-11-25 00:02:41,426 INFO L349 Elim1Store]: treesize reduction 118, result has 12.6 percent of original size [2023-11-25 00:02:41,427 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 [2023-11-25 00:02:41,564 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:41,596 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:02:41,623 INFO L349 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2023-11-25 00:02:41,623 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 [2023-11-25 00:02:42,574 INFO L349 Elim1Store]: treesize reduction 36, result has 18.2 percent of original size [2023-11-25 00:02:42,575 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 [2023-11-25 00:02:47,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-25 00:02:47,574 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 [2023-11-25 00:02:47,708 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 [2023-11-25 00:02:49,895 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 [2023-11-25 00:02:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:49,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:49,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:49,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997758342] [2023-11-25 00:02:49,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:02:49,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391154394] [2023-11-25 00:02:49,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391154394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:49,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:49,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:02:49,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190152249] [2023-11-25 00:02:49,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:49,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:02:49,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:49,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:02:49,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:49,938 INFO L87 Difference]: Start difference. First operand 224 states and 252 transitions. Second operand has 6 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:50,035 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 [2023-11-25 00:02:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:51,612 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2023-11-25 00:02:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:02:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-25 00:02:51,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:51,616 INFO L225 Difference]: With dead ends: 248 [2023-11-25 00:02:51,616 INFO L226 Difference]: Without dead ends: 247 [2023-11-25 00:02:51,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=30, Unknown=1, NotChecked=10, Total=56 [2023-11-25 00:02:51,618 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 96 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:51,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 662 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 5 Unknown, 4 Unchecked, 1.4s Time] [2023-11-25 00:02:51,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-25 00:02:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 224. [2023-11-25 00:02:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.8181818181818181) internal successors, (240), 216 states have internal predecessors, (240), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-25 00:02:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 251 transitions. [2023-11-25 00:02:51,641 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 251 transitions. Word has length 15 [2023-11-25 00:02:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:51,641 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 251 transitions. [2023-11-25 00:02:51,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 251 transitions. [2023-11-25 00:02:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-25 00:02:51,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:51,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:51,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:51,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:51,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_25_to_33_0Err11ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-25 00:02:51,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:51,849 INFO L85 PathProgramCache]: Analyzing trace with hash -293201720, now seen corresponding path program 1 times [2023-11-25 00:02:51,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:51,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728356986] [2023-11-25 00:02:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:51,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:51,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:02:51,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941851488] [2023-11-25 00:02:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:51,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:51,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:51,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:51,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:02:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:51,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-25 00:02:51,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:51,986 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-11-25 00:02:51,986 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 [2023-11-25 00:02:52,039 INFO L349 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2023-11-25 00:02:52,039 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 [2023-11-25 00:02:52,071 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-11-25 00:02:52,072 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 [2023-11-25 00:02:52,102 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-11-25 00:02:52,102 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 [2023-11-25 00:02:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:52,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:52,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728356986] [2023-11-25 00:02:52,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:02:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941851488] [2023-11-25 00:02:52,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941851488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:52,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:52,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:02:52,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371622329] [2023-11-25 00:02:52,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:52,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:02:52,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:52,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:02:52,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:52,638 INFO L87 Difference]: Start difference. First operand 224 states and 251 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:53,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:53,272 INFO L93 Difference]: Finished difference Result 330 states and 334 transitions. [2023-11-25 00:02:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:02:53,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-25 00:02:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:53,275 INFO L225 Difference]: With dead ends: 330 [2023-11-25 00:02:53,276 INFO L226 Difference]: Without dead ends: 329 [2023-11-25 00:02:53,276 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 [2023-11-25 00:02:53,277 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 241 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:53,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 640 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:02:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-25 00:02:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 224. [2023-11-25 00:02:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.8106060606060606) internal successors, (239), 216 states have internal predecessors, (239), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-25 00:02:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 250 transitions. [2023-11-25 00:02:53,316 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 250 transitions. Word has length 16 [2023-11-25 00:02:53,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:53,316 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 250 transitions. [2023-11-25 00:02:53,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:02:53,317 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 250 transitions. [2023-11-25 00:02:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-25 00:02:53,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:53,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:53,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:53,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:53,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_25_to_33_0Err12ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-25 00:02:53,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash -499318669, now seen corresponding path program 1 times [2023-11-25 00:02:53,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:53,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108596001] [2023-11-25 00:02:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:53,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:53,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:02:53,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399250540] [2023-11-25 00:02:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:53,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:53,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:53,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:53,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:02:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:53,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-25 00:02:53,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:53,668 INFO L349 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-11-25 00:02:53,669 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 [2023-11-25 00:02:53,679 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 [2023-11-25 00:02:53,796 INFO L349 Elim1Store]: treesize reduction 133, result has 29.6 percent of original size [2023-11-25 00:02:53,796 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 [2023-11-25 00:02:53,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:02:53,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:02:53,890 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 [2023-11-25 00:02:54,088 INFO L349 Elim1Store]: treesize reduction 153, result has 26.1 percent of original size [2023-11-25 00:02:54,089 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 [2023-11-25 00:02:54,772 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-25 00:02:54,773 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 [2023-11-25 00:02:54,821 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 [2023-11-25 00:02:54,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:54,878 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 [2023-11-25 00:02:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:54,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:54,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:54,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108596001] [2023-11-25 00:02:54,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:02:54,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399250540] [2023-11-25 00:02:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399250540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:54,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:54,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:02:54,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135467229] [2023-11-25 00:02:54,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:54,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:02:54,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:54,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:02:54,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:02:54,995 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) [2023-11-25 00:02:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:55,372 INFO L93 Difference]: Finished difference Result 329 states and 333 transitions. [2023-11-25 00:02:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:02:55,373 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 [2023-11-25 00:02:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:55,375 INFO L225 Difference]: With dead ends: 329 [2023-11-25 00:02:55,375 INFO L226 Difference]: Without dead ends: 323 [2023-11-25 00:02:55,376 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 [2023-11-25 00:02:55,377 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 220 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:55,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 657 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:02:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-25 00:02:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 224. [2023-11-25 00:02:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.7651515151515151) internal successors, (233), 216 states have internal predecessors, (233), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-25 00:02:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 244 transitions. [2023-11-25 00:02:55,396 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 244 transitions. Word has length 17 [2023-11-25 00:02:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:55,397 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 244 transitions. [2023-11-25 00:02:55,397 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) [2023-11-25 00:02:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 244 transitions. [2023-11-25 00:02:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-25 00:02:55,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:55,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:55,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:55,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:55,606 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_25_to_33_0Err18ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_25_to_33_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_25_to_33_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 82 more)] === [2023-11-25 00:02:55,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1349020391, now seen corresponding path program 1 times [2023-11-25 00:02:55,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:55,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332191949] [2023-11-25 00:02:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:55,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:55,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:02:55,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220297931] [2023-11-25 00:02:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:55,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:55,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:55,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:55,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:02:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:55,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-25 00:02:55,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,762 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 [2023-11-25 00:02:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,773 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 [2023-11-25 00:02:55,782 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 [2023-11-25 00:02:55,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,807 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 [2023-11-25 00:02:55,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-11-25 00:02:55,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:02:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,829 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 [2023-11-25 00:02:55,841 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-25 00:02:55,842 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 [2023-11-25 00:02:55,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,850 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 [2023-11-25 00:02:55,858 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 [2023-11-25 00:02:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,877 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 [2023-11-25 00:02:55,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,894 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 [2023-11-25 00:02:55,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:55,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-25 00:02:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:56,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:56,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:56,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332191949] [2023-11-25 00:02:56,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:02:56,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220297931] [2023-11-25 00:02:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220297931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:56,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:56,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:02:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602967102] [2023-11-25 00:02:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:56,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:02:56,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:02:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:02:56,036 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) [2023-11-25 00:02:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:56,563 INFO L93 Difference]: Finished difference Result 323 states and 327 transitions. [2023-11-25 00:02:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:02:56,564 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 [2023-11-25 00:02:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:56,566 INFO L225 Difference]: With dead ends: 323 [2023-11-25 00:02:56,566 INFO L226 Difference]: Without dead ends: 322 [2023-11-25 00:02:56,567 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 [2023-11-25 00:02:56,569 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 220 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:56,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 778 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:02:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-25 00:02:56,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 224. [2023-11-25 00:02:56,587 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) [2023-11-25 00:02:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 243 transitions. [2023-11-25 00:02:56,591 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 243 transitions. Word has length 23 [2023-11-25 00:02:56,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:56,592 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 243 transitions. [2023-11-25 00:02:56,592 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) [2023-11-25 00:02:56,592 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 243 transitions. [2023-11-25 00:02:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-25 00:02:56,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:56,593 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] [2023-11-25 00:02:56,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:02:56,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:56,801 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)] === [2023-11-25 00:02:56,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:56,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1130040912, now seen corresponding path program 1 times [2023-11-25 00:02:56,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:56,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522755225] [2023-11-25 00:02:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:56,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:56,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:02:56,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970333059] [2023-11-25 00:02:56,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:56,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:56,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:56,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:56,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:02:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:56,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-25 00:02:56,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:56,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:57,019 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-11-25 00:02:57,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 114 [2023-11-25 00:02:57,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:57,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2023-11-25 00:02:57,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:02:57,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:57,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-25 00:02:57,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:02:57,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:02:57,269 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-25 00:02:57,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:02:57,344 INFO L349 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2023-11-25 00:02:57,345 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 [2023-11-25 00:02:57,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:02:57,365 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 [2023-11-25 00:02:57,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:02:57,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:02:57,457 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 [2023-11-25 00:02:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:58,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:58,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:58,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522755225] [2023-11-25 00:02:58,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:02:58,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970333059] [2023-11-25 00:02:58,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970333059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:58,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:58,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-25 00:02:58,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933379647] [2023-11-25 00:02:58,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:58,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-25 00:02:58,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:58,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-25 00:02:58,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:02:58,068 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) [2023-11-25 00:02:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:02:59,402 INFO L93 Difference]: Finished difference Result 322 states and 326 transitions. [2023-11-25 00:02:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-25 00:02:59,403 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 [2023-11-25 00:02:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:02:59,405 INFO L225 Difference]: With dead ends: 322 [2023-11-25 00:02:59,405 INFO L226 Difference]: Without dead ends: 321 [2023-11-25 00:02:59,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2023-11-25 00:02:59,407 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 203 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:02:59,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 739 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-25 00:02:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-25 00:02:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 224. [2023-11-25 00:02:59,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 132 states have (on average 1.75) internal successors, (231), 216 states have internal predecessors, (231), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-25 00:02:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 242 transitions. [2023-11-25 00:02:59,423 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 242 transitions. Word has length 24 [2023-11-25 00:02:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:02:59,423 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 242 transitions. [2023-11-25 00:02:59,424 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) [2023-11-25 00:02:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 242 transitions. [2023-11-25 00:02:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-25 00:02:59,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:02:59,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:02:59,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-25 00:02:59,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:59,631 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)] === [2023-11-25 00:02:59,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:02:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash 671529979, now seen corresponding path program 1 times [2023-11-25 00:02:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:02:59,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076027751] [2023-11-25 00:02:59,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:02:59,654 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:02:59,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025511029] [2023-11-25 00:02:59,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:02:59,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:02:59,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:02:59,656 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:02:59,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:02:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:02:59,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:02:59,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:02:59,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-25 00:02:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:02:59,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:02:59,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:02:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076027751] [2023-11-25 00:02:59,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:02:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025511029] [2023-11-25 00:02:59,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025511029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:02:59,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:02:59,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:02:59,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259454858] [2023-11-25 00:02:59,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:02:59,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:02:59,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:02:59,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:02:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:02:59,795 INFO L87 Difference]: Start difference. First operand 224 states and 242 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:00,039 INFO L93 Difference]: Finished difference Result 226 states and 244 transitions. [2023-11-25 00:03:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:00,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-25 00:03:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:00,041 INFO L225 Difference]: With dead ends: 226 [2023-11-25 00:03:00,041 INFO L226 Difference]: Without dead ends: 225 [2023-11-25 00:03:00,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:03:00,042 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 118 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:00,043 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] [2023-11-25 00:03:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-25 00:03:00,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2023-11-25 00:03:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 133 states have (on average 1.7293233082706767) internal successors, (230), 216 states have internal predecessors, (230), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-25 00:03:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 242 transitions. [2023-11-25 00:03:00,059 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 242 transitions. Word has length 25 [2023-11-25 00:03:00,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:00,059 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 242 transitions. [2023-11-25 00:03:00,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 242 transitions. [2023-11-25 00:03:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-25 00:03:00,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:00,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:00,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:00,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:00,267 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)] === [2023-11-25 00:03:00,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash -657407054, now seen corresponding path program 1 times [2023-11-25 00:03:00,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:00,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453332324] [2023-11-25 00:03:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:00,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:00,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:00,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607966298] [2023-11-25 00:03:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:00,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:00,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:00,288 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:00,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:03:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:00,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:03:00,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:00,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-25 00:03:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:00,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:00,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:00,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453332324] [2023-11-25 00:03:00,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:00,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607966298] [2023-11-25 00:03:00,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607966298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:00,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:00,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:03:00,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287460765] [2023-11-25 00:03:00,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:00,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:03:00,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:03:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:03:00,433 INFO L87 Difference]: Start difference. First operand 225 states and 242 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:00,686 INFO L93 Difference]: Finished difference Result 225 states and 242 transitions. [2023-11-25 00:03:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-25 00:03:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:00,689 INFO L225 Difference]: With dead ends: 225 [2023-11-25 00:03:00,689 INFO L226 Difference]: Without dead ends: 224 [2023-11-25 00:03:00,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:03:00,690 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 112 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:00,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 463 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:03:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-25 00:03:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2023-11-25 00:03:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 133 states have (on average 1.7142857142857142) internal successors, (228), 215 states have internal predecessors, (228), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-25 00:03:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 240 transitions. [2023-11-25 00:03:00,705 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 240 transitions. Word has length 26 [2023-11-25 00:03:00,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:00,706 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 240 transitions. [2023-11-25 00:03:00,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:00,706 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 240 transitions. [2023-11-25 00:03:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-25 00:03:00,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:00,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:00,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-25 00:03:00,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:00,914 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)] === [2023-11-25 00:03:00,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:00,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1095217885, now seen corresponding path program 1 times [2023-11-25 00:03:00,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:00,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503619447] [2023-11-25 00:03:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:00,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:00,929 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:00,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544199693] [2023-11-25 00:03:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:00,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:00,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:00,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:00,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:03:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:01,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-25 00:03:01,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:01,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-25 00:03:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:01,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:01,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:01,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503619447] [2023-11-25 00:03:01,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:01,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544199693] [2023-11-25 00:03:01,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544199693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:01,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:01,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:03:01,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216736941] [2023-11-25 00:03:01,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:01,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:03:01,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:03:01,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:03:01,083 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) [2023-11-25 00:03:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:01,313 INFO L93 Difference]: Finished difference Result 224 states and 240 transitions. [2023-11-25 00:03:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:01,314 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 [2023-11-25 00:03:01,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:01,315 INFO L225 Difference]: With dead ends: 224 [2023-11-25 00:03:01,315 INFO L226 Difference]: Without dead ends: 222 [2023-11-25 00:03:01,316 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 [2023-11-25 00:03:01,316 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 89 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:01,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 577 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:03:01,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-11-25 00:03:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2023-11-25 00:03:01,328 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) [2023-11-25 00:03:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 237 transitions. [2023-11-25 00:03:01,330 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 237 transitions. Word has length 27 [2023-11-25 00:03:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:01,331 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 237 transitions. [2023-11-25 00:03:01,331 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) [2023-11-25 00:03:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 237 transitions. [2023-11-25 00:03:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-25 00:03:01,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:01,332 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] [2023-11-25 00:03:01,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:01,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:01,534 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)] === [2023-11-25 00:03:01,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash -407983852, now seen corresponding path program 1 times [2023-11-25 00:03:01,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:01,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161254902] [2023-11-25 00:03:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:01,550 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:01,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572299760] [2023-11-25 00:03:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:01,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:01,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:01,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:01,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-25 00:03:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:01,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-25 00:03:01,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:01,737 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 [2023-11-25 00:03:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:01,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:01,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:01,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161254902] [2023-11-25 00:03:01,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:01,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572299760] [2023-11-25 00:03:01,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572299760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:01,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:01,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:03:01,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964057284] [2023-11-25 00:03:01,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:01,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:03:01,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:03:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:03:01,758 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) [2023-11-25 00:03:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:02,008 INFO L93 Difference]: Finished difference Result 222 states and 237 transitions. [2023-11-25 00:03:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:03:02,009 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 [2023-11-25 00:03:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:02,010 INFO L225 Difference]: With dead ends: 222 [2023-11-25 00:03:02,010 INFO L226 Difference]: Without dead ends: 221 [2023-11-25 00:03:02,011 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 [2023-11-25 00:03:02,011 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 158 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-11-25 00:03:02,012 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] [2023-11-25 00:03:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-11-25 00:03:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-11-25 00:03:02,024 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) [2023-11-25 00:03:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 235 transitions. [2023-11-25 00:03:02,026 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 235 transitions. Word has length 28 [2023-11-25 00:03:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:02,026 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 235 transitions. [2023-11-25 00:03:02,026 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) [2023-11-25 00:03:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 235 transitions. [2023-11-25 00:03:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-25 00:03:02,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:02,027 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] [2023-11-25 00:03:02,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:02,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:02,234 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)] === [2023-11-25 00:03:02,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:02,234 INFO L85 PathProgramCache]: Analyzing trace with hash 237402559, now seen corresponding path program 1 times [2023-11-25 00:03:02,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:02,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722444630] [2023-11-25 00:03:02,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:02,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:02,250 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:02,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162547309] [2023-11-25 00:03:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:02,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:02,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:02,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:02,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-25 00:03:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:02,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-25 00:03:02,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:02,468 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 [2023-11-25 00:03:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:02,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:02,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:02,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722444630] [2023-11-25 00:03:02,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:02,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162547309] [2023-11-25 00:03:02,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162547309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:02,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:02,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:03:02,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836350028] [2023-11-25 00:03:02,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:02,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:03:02,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:02,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:03:02,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:03:02,492 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) [2023-11-25 00:03:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:02,885 INFO L93 Difference]: Finished difference Result 221 states and 235 transitions. [2023-11-25 00:03:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-25 00:03:02,886 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 [2023-11-25 00:03:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:02,888 INFO L225 Difference]: With dead ends: 221 [2023-11-25 00:03:02,888 INFO L226 Difference]: Without dead ends: 220 [2023-11-25 00:03:02,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:03:02,889 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:02,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 568 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:03:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-25 00:03:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2023-11-25 00:03:02,902 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) [2023-11-25 00:03:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 233 transitions. [2023-11-25 00:03:02,904 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 233 transitions. Word has length 29 [2023-11-25 00:03:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:02,904 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 233 transitions. [2023-11-25 00:03:02,905 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) [2023-11-25 00:03:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 233 transitions. [2023-11-25 00:03:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-25 00:03:02,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:02,906 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] [2023-11-25 00:03:02,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:03,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-25 00:03:03,112 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)] === [2023-11-25 00:03:03,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:03,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1230455178, now seen corresponding path program 1 times [2023-11-25 00:03:03,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:03,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063516415] [2023-11-25 00:03:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:03,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:03,140 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:03,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791777622] [2023-11-25 00:03:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:03,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:03,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:03,142 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:03,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-25 00:03:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:03,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-25 00:03:03,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:03,374 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 [2023-11-25 00:03:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:03,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:03,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:03,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063516415] [2023-11-25 00:03:03,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:03,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791777622] [2023-11-25 00:03:03,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791777622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:03,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:03,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:03:03,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055287692] [2023-11-25 00:03:03,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:03,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-25 00:03:03,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:03,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-25 00:03:03,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:03:03,409 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) [2023-11-25 00:03:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:03,849 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2023-11-25 00:03:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-25 00:03:03,850 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 [2023-11-25 00:03:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:03,852 INFO L225 Difference]: With dead ends: 220 [2023-11-25 00:03:03,852 INFO L226 Difference]: Without dead ends: 219 [2023-11-25 00:03:03,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:03:03,854 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 135 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:03,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 663 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:03:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-25 00:03:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-11-25 00:03:03,868 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) [2023-11-25 00:03:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 231 transitions. [2023-11-25 00:03:03,870 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 231 transitions. Word has length 30 [2023-11-25 00:03:03,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:03,871 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 231 transitions. [2023-11-25 00:03:03,871 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) [2023-11-25 00:03:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 231 transitions. [2023-11-25 00:03:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-25 00:03:03,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:03,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:03,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:04,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-25 00:03:04,083 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)] === [2023-11-25 00:03:04,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:04,083 INFO L85 PathProgramCache]: Analyzing trace with hash 510595233, now seen corresponding path program 1 times [2023-11-25 00:03:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:04,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445877623] [2023-11-25 00:03:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:04,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:04,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688813861] [2023-11-25 00:03:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:04,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:04,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:04,102 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:04,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-25 00:03:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:04,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-25 00:03:04,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:04,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:03:04,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:03:04,287 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-11-25 00:03:04,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 114 [2023-11-25 00:03:04,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:03:04,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:03:04,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2023-11-25 00:03:04,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:03:04,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:03:04,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-25 00:03:04,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:03:04,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-25 00:03:04,538 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-25 00:03:04,542 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 [2023-11-25 00:03:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:04,971 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:04,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:04,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445877623] [2023-11-25 00:03:04,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688813861] [2023-11-25 00:03:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688813861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:04,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:04,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:03:04,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638256325] [2023-11-25 00:03:04,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:04,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:03:04,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:04,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:03:04,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:03:04,974 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) [2023-11-25 00:03:05,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:05,693 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2023-11-25 00:03:05,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:03:05,694 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 [2023-11-25 00:03:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:05,696 INFO L225 Difference]: With dead ends: 310 [2023-11-25 00:03:05,696 INFO L226 Difference]: Without dead ends: 309 [2023-11-25 00:03:05,697 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 [2023-11-25 00:03:05,697 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 167 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2023-11-25 00:03:05,698 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] [2023-11-25 00:03:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-25 00:03:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 219. [2023-11-25 00:03:05,712 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) [2023-11-25 00:03:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 230 transitions. [2023-11-25 00:03:05,714 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 230 transitions. Word has length 31 [2023-11-25 00:03:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:05,715 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 230 transitions. [2023-11-25 00:03:05,715 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) [2023-11-25 00:03:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 230 transitions. [2023-11-25 00:03:05,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-25 00:03:05,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:05,716 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] [2023-11-25 00:03:05,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9287a467-4aba-4475-84d5-0210bd5dbb35/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0