./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:27:28,743 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:27:28,806 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 15:27:28,810 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:27:28,810 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:27:28,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:27:28,833 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:27:28,834 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:27:28,834 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:27:28,835 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:27:28,835 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:27:28,836 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:27:28,837 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:27:28,837 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:27:28,838 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:27:28,838 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:27:28,839 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:27:28,839 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:27:28,840 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:27:28,840 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:27:28,841 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:27:28,848 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:27:28,849 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:27:28,849 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:27:28,850 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:27:28,850 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:27:28,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:27:28,851 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:27:28,851 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:27:28,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:27:28,852 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:27:28,852 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 15:27:28,852 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:27:28,853 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:27:28,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:27:28,853 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:27:28,853 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:27:28,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:27:28,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:27:28,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:27:28,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:27:28,854 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:27:28,855 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:27:28,855 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:27:28,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:27:28,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:27:28,855 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:27:28,855 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:27:28,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:27:28,856 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_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c [2023-12-02 15:27:29,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:27:29,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:27:29,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:27:29,087 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:27:29,087 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:27:29,088 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2023-12-02 15:27:31,911 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:27:32,100 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:27:32,101 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2023-12-02 15:27:32,108 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/data/c2f15a469/9501fae25b7c459d975f1e3a98775962/FLAG720c11f04 [2023-12-02 15:27:32,120 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/data/c2f15a469/9501fae25b7c459d975f1e3a98775962 [2023-12-02 15:27:32,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:27:32,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:27:32,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:27:32,125 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:27:32,130 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:27:32,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,131 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237efda8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32, skipping insertion in model container [2023-12-02 15:27:32,131 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,151 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:27:32,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:27:32,296 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:27:32,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:27:32,331 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:27:32,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32 WrapperNode [2023-12-02 15:27:32,331 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:27:32,332 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:27:32,332 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:27:32,332 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:27:32,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,345 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,369 INFO L138 Inliner]: procedures = 16, calls = 60, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2023-12-02 15:27:32,370 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:27:32,371 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:27:32,371 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:27:32,371 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:27:32,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,383 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,392 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:27:32,399 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:27:32,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:27:32,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:27:32,400 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (1/1) ... [2023-12-02 15:27:32,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:27:32,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:27:32,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:27:32,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:27:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:27:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 15:27:32,469 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 15:27:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:27:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:27:32,469 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_42_0 [2023-12-02 15:27:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_42_0 [2023-12-02 15:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:27:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 15:27:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 15:27:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 15:27:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:27:32,540 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:27:32,542 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:27:32,915 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:27:32,949 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:27:32,949 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 15:27:32,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:27:32 BoogieIcfgContainer [2023-12-02 15:27:32,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:27:32,954 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:27:32,954 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:27:32,957 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:27:32,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:27:32" (1/3) ... [2023-12-02 15:27:32,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579f326b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:27:32, skipping insertion in model container [2023-12-02 15:27:32,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:27:32" (2/3) ... [2023-12-02 15:27:32,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579f326b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:27:32, skipping insertion in model container [2023-12-02 15:27:32,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:27:32" (3/3) ... [2023-12-02 15:27:32,959 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat2-ll.c [2023-12-02 15:27:32,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:27:32,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2023-12-02 15:27:33,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:27:33,024 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;@3756c1a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:27:33,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-12-02 15:27:33,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 69 states have (on average 1.855072463768116) internal successors, (128), 126 states have internal predecessors, (128), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:27:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 15:27:33,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:27:33,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 15:27:33,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:27:33,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:27:33,038 INFO L85 PathProgramCache]: Analyzing trace with hash 6544, now seen corresponding path program 1 times [2023-12-02 15:27:33,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:27:33,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167211897] [2023-12-02 15:27:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:27:33,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:27:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:27:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:27:33,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:27:33,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167211897] [2023-12-02 15:27:33,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167211897] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:27:33,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:27:33,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:27:33,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216753222] [2023-12-02 15:27:33,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:27:33,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:27:33,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:27:33,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:27:33,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:27:33,285 INFO L87 Difference]: Start difference. First operand has 135 states, 69 states have (on average 1.855072463768116) internal successors, (128), 126 states have internal predecessors, (128), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:27:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:27:33,371 INFO L93 Difference]: Finished difference Result 175 states and 180 transitions. [2023-12-02 15:27:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:27:33,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-12-02 15:27:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:27:33,383 INFO L225 Difference]: With dead ends: 175 [2023-12-02 15:27:33,383 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 15:27:33,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:27:33,389 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 57 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:27:33,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 175 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:27:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 15:27:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-12-02 15:27:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 68 states have (on average 1.75) internal successors, (119), 118 states have internal predecessors, (119), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 15:27:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2023-12-02 15:27:33,437 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 2 [2023-12-02 15:27:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:27:33,438 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2023-12-02 15:27:33,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:27:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2023-12-02 15:27:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 15:27:33,438 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:27:33,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 15:27:33,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:27:33,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:27:33,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:27:33,440 INFO L85 PathProgramCache]: Analyzing trace with hash 202900, now seen corresponding path program 1 times [2023-12-02 15:27:33,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:27:33,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584281174] [2023-12-02 15:27:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:27:33,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:27:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:27:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:27:33,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:27:33,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584281174] [2023-12-02 15:27:33,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584281174] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:27:33,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:27:33,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:27:33,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233053879] [2023-12-02 15:27:33,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:27:33,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:27:33,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:27:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:27:33,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:27:33,533 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:27:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:27:33,611 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2023-12-02 15:27:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:27:33,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 15:27:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:27:33,614 INFO L225 Difference]: With dead ends: 126 [2023-12-02 15:27:33,614 INFO L226 Difference]: Without dead ends: 122 [2023-12-02 15:27:33,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:27:33,616 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 51 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:27:33,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 171 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:27:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-02 15:27:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-12-02 15:27:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.6911764705882353) internal successors, (115), 114 states have internal predecessors, (115), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 15:27:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2023-12-02 15:27:33,630 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 3 [2023-12-02 15:27:33,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:27:33,631 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2023-12-02 15:27:33,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:27:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2023-12-02 15:27:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 15:27:33,631 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:27:33,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:27:33,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 15:27:33,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:27:33,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:27:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1594978280, now seen corresponding path program 1 times [2023-12-02 15:27:33,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:27:33,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390485354] [2023-12-02 15:27:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:27:33,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:27:33,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:27:33,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553358331] [2023-12-02 15:27:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:27:33,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:27:33,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:27:33,657 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:27:33,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:27:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:27:33,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:27:33,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:27:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:27:33,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:27:33,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:27:33,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390485354] [2023-12-02 15:27:33,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:27:33,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553358331] [2023-12-02 15:27:33,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553358331] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:27:33,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:27:33,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:27:33,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401320492] [2023-12-02 15:27:33,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:27:33,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:27:33,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:27:33,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:27:33,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:27:33,776 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:27:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:27:33,813 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2023-12-02 15:27:33,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:27:33,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 15:27:33,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:27:33,815 INFO L225 Difference]: With dead ends: 122 [2023-12-02 15:27:33,815 INFO L226 Difference]: Without dead ends: 120 [2023-12-02 15:27:33,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:27:33,817 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 45 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:27:33,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 171 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:27:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-02 15:27:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-12-02 15:27:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.661764705882353) internal successors, (113), 112 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 15:27:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2023-12-02 15:27:33,829 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 7 [2023-12-02 15:27:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:27:33,829 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2023-12-02 15:27:33,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:27:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2023-12-02 15:27:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 15:27:33,830 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:27:33,831 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:27:33,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 15:27:34,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:27:34,036 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:27:34,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:27:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash -894175962, now seen corresponding path program 1 times [2023-12-02 15:27:34,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:27:34,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913244678] [2023-12-02 15:27:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:27:34,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:27:34,054 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:27:34,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351925807] [2023-12-02 15:27:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:27:34,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:27:34,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:27:34,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:27:34,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:27:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:27:34,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:27:34,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:27:34,192 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 10 treesize of output 8 [2023-12-02 15:27:34,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:27:34,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 11 [2023-12-02 15:27:34,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 11 [2023-12-02 15:27:34,508 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 15:27:34,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 42 [2023-12-02 15:27:34,548 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2023-12-02 15:27:34,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 15:27:34,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-12-02 15:27:34,581 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 18 treesize of output 3 [2023-12-02 15:27:34,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:27:34,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-12-02 15:27:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:27:34,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:27:34,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:27:34,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913244678] [2023-12-02 15:27:34,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:27:34,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351925807] [2023-12-02 15:27:34,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351925807] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:27:34,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:27:34,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:27:34,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450984866] [2023-12-02 15:27:34,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:27:34,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:27:34,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:27:34,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:27:34,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:27:34,708 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:27:35,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:27:37,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:27:39,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:27:40,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:27:42,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:27:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:27:43,009 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2023-12-02 15:27:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:27:43,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-12-02 15:27:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:27:43,012 INFO L225 Difference]: With dead ends: 120 [2023-12-02 15:27:43,012 INFO L226 Difference]: Without dead ends: 119 [2023-12-02 15:27:43,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:27:43,013 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 12 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:27:43,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 309 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 5 Unknown, 0 Unchecked, 8.2s Time] [2023-12-02 15:27:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-02 15:27:43,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-12-02 15:27:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 111 states have internal predecessors, (112), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 15:27:43,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2023-12-02 15:27:43,025 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 22 [2023-12-02 15:27:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:27:43,026 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2023-12-02 15:27:43,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:27:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2023-12-02 15:27:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 15:27:43,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:27:43,028 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:27:43,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:27:43,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:27:43,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:27:43,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:27:43,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1949650982, now seen corresponding path program 1 times [2023-12-02 15:27:43,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:27:43,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868545212] [2023-12-02 15:27:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:27:43,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:27:43,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:27:43,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187679006] [2023-12-02 15:27:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:27:43,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:27:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:27:43,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:27:43,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:27:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:27:43,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 15:27:43,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:27:43,359 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 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:27:43,366 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 10 treesize of output 8 [2023-12-02 15:27:43,883 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2023-12-02 15:27:43,883 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 2 case distinctions, treesize of input 52 treesize of output 36 [2023-12-02 15:27:43,926 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2023-12-02 15:27:43,927 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 2 case distinctions, treesize of input 45 treesize of output 36 [2023-12-02 15:27:43,988 INFO L349 Elim1Store]: treesize reduction 87, result has 17.1 percent of original size [2023-12-02 15:27:43,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 77 [2023-12-02 15:27:44,084 INFO L349 Elim1Store]: treesize reduction 47, result has 49.5 percent of original size [2023-12-02 15:27:44,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 91 [2023-12-02 15:27:44,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:27:44,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-12-02 15:27:44,282 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 31 treesize of output 15 [2023-12-02 15:27:44,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 15:27:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:27:44,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:27:44,441 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#v~0#1.base| Int) (v_ArrVal_109 (Array Int Int)) (v_ArrVal_107 Int) (v_ArrVal_106 Int) (|ULTIMATE.start_main_~#u~0#1.offset| Int)) (or (< (* |c_ULTIMATE.start_main_~R~0#1| |c_ULTIMATE.start_main_~R~0#1|) (+ 9223372036854775808 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#u~0#1.base| v_ArrVal_109) |ULTIMATE.start_main_~#v~0#1.base| (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#u~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#u~0#1.base|) |ULTIMATE.start_main_~#u~0#1.offset| v_ArrVal_107)) |ULTIMATE.start_main_~#v~0#1.base|) |c_ULTIMATE.start_main_~#v~0#1.offset| v_ArrVal_106)) |c_ULTIMATE.start_main_~#A~0#1.base|) |c_ULTIMATE.start_main_~#A~0#1.offset|))) (< v_ArrVal_106 1))) is different from false [2023-12-02 15:27:44,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:27:44,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868545212] [2023-12-02 15:27:44,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:27:44,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187679006] [2023-12-02 15:27:44,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187679006] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:27:44,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1102926238] [2023-12-02 15:27:44,542 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 15:27:44,542 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:27:44,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:27:44,550 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:27:44,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:27:45,835 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 178 for LOIs [2023-12-02 15:27:45,969 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:27:59,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1102926238] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:27:59,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:27:59,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 18 [2023-12-02 15:27:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509502165] [2023-12-02 15:27:59,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:27:59,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 15:27:59,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:27:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 15:27:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=343, Unknown=3, NotChecked=40, Total=506 [2023-12-02 15:27:59,790 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 12 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:28:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:28:05,628 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2023-12-02 15:28:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 15:28:05,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-12-02 15:28:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:28:05,629 INFO L225 Difference]: With dead ends: 119 [2023-12-02 15:28:05,629 INFO L226 Difference]: Without dead ends: 118 [2023-12-02 15:28:05,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=120, Invalid=343, Unknown=3, NotChecked=40, Total=506 [2023-12-02 15:28:05,630 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 0 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:28:05,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 575 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2023-12-02 15:28:05,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-02 15:28:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-12-02 15:28:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 110 states have internal predecessors, (111), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 15:28:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2023-12-02 15:28:05,642 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 23 [2023-12-02 15:28:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:28:05,642 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2023-12-02 15:28:05,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:28:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2023-12-02 15:28:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 15:28:05,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:28:05,644 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:28:05,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:28:05,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:28:05,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_33_to_42_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:28:05,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:28:05,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1161327311, now seen corresponding path program 1 times [2023-12-02 15:28:05,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:28:05,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354410859] [2023-12-02 15:28:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:28:05,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:28:05,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:28:05,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346911005] [2023-12-02 15:28:05,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:28:05,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:28:05,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:28:05,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:28:05,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:28:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:28:05,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 15:28:05,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:28:05,950 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 18 treesize of output 16 [2023-12-02 15:28:06,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 31 treesize of output 19 [2023-12-02 15:28:06,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 30 treesize of output 14 [2023-12-02 15:28:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:28:06,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:28:06,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:28:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354410859] [2023-12-02 15:28:06,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:28:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346911005] [2023-12-02 15:28:06,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346911005] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:28:06,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:28:06,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:28:06,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68176065] [2023-12-02 15:28:06,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:28:06,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:28:06,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:28:06,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:28:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:28:06,197 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 8 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:28:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:28:06,521 INFO L93 Difference]: Finished difference Result 203 states and 208 transitions. [2023-12-02 15:28:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:28:06,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-12-02 15:28:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:28:06,523 INFO L225 Difference]: With dead ends: 203 [2023-12-02 15:28:06,523 INFO L226 Difference]: Without dead ends: 201 [2023-12-02 15:28:06,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:28:06,525 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 225 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:28:06,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 529 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:28:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-02 15:28:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 143. [2023-12-02 15:28:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.6593406593406594) internal successors, (151), 133 states have internal predecessors, (151), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:28:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2023-12-02 15:28:06,539 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 27 [2023-12-02 15:28:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:28:06,539 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2023-12-02 15:28:06,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:28:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2023-12-02 15:28:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 15:28:06,540 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:28:06,540 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:28:06,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 15:28:06,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:28:06,741 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_33_to_42_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:28:06,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:28:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1641408404, now seen corresponding path program 1 times [2023-12-02 15:28:06,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:28:06,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509072374] [2023-12-02 15:28:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:28:06,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:28:06,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:28:06,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409781953] [2023-12-02 15:28:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:28:06,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:28:06,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:28:06,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:28:06,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:28:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:28:06,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 15:28:06,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:28:06,852 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 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:28:06,859 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 15:28:06,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-12-02 15:28:07,436 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2023-12-02 15:28:07,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 55 [2023-12-02 15:28:07,455 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-12-02 15:28:07,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 46 [2023-12-02 15:28:07,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 53 treesize of output 33 [2023-12-02 15:28:07,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 28 [2023-12-02 15:28:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:28:07,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:28:12,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:28:12,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509072374] [2023-12-02 15:28:12,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:28:12,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409781953] [2023-12-02 15:28:12,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409781953] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:28:12,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327757124] [2023-12-02 15:28:12,250 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 15:28:12,250 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:28:12,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:28:12,250 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:28:12,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:28:13,328 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_33_to_42_0 with input of size 136 for LOIs [2023-12-02 15:28:13,551 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 182 for LOIs [2023-12-02 15:28:13,661 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:28:48,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1327757124] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:28:48,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:28:48,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12] total 26 [2023-12-02 15:28:48,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753868008] [2023-12-02 15:28:48,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:28:48,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 15:28:48,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:28:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 15:28:48,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=973, Unknown=14, NotChecked=0, Total=1190 [2023-12-02 15:28:48,997 INFO L87 Difference]: Start difference. First operand 143 states and 164 transitions. Second operand has 16 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:28:53,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:28:56,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:28:58,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:00,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:02,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:04,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:06,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:08,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:10,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:13,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:21,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:23,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:25,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:27,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:29,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:30,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:32,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:34,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:35,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:38,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:40,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:41,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:43,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:45,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:47,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:49,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:51,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:54,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:56,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:29:58,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:30:00,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:30:02,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:30:04,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:30:06,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:30:08,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:30:10,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:30:12,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:30:14,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:30:16,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:30:17,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:30:17,125 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2023-12-02 15:30:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 15:30:17,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 15:30:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:30:17,126 INFO L225 Difference]: With dead ends: 201 [2023-12-02 15:30:17,126 INFO L226 Difference]: Without dead ends: 199 [2023-12-02 15:30:17,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=203, Invalid=973, Unknown=14, NotChecked=0, Total=1190 [2023-12-02 15:30:17,128 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 150 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 4 mSolverCounterUnsat, 43 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 43 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:30:17,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 555 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 319 Invalid, 43 Unknown, 0 Unchecked, 88.1s Time] [2023-12-02 15:30:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-12-02 15:30:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 143. [2023-12-02 15:30:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.6373626373626373) internal successors, (149), 133 states have internal predecessors, (149), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:30:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2023-12-02 15:30:17,144 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 28 [2023-12-02 15:30:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:30:17,144 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2023-12-02 15:30:17,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:30:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2023-12-02 15:30:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 15:30:17,145 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:30:17,145 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:30:17,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 15:30:17,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:30:17,346 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_33_to_42_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:30:17,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:30:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash 995230739, now seen corresponding path program 1 times [2023-12-02 15:30:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:30:17,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069901737] [2023-12-02 15:30:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:30:17,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:30:17,360 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:30:17,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812132442] [2023-12-02 15:30:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:30:17,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:30:17,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:30:17,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:30:17,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 15:30:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:30:17,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 15:30:17,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:30:17,449 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 51 treesize of output 49 [2023-12-02 15:30:17,601 INFO L349 Elim1Store]: treesize reduction 13, result has 53.6 percent of original size [2023-12-02 15:30:17,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2023-12-02 15:30:17,738 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-12-02 15:30:17,738 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 2 case distinctions, treesize of input 40 treesize of output 40 [2023-12-02 15:30:17,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:30:17,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2023-12-02 15:30:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:30:17,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:30:17,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:30:17,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069901737] [2023-12-02 15:30:17,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:30:17,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812132442] [2023-12-02 15:30:17,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812132442] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:30:17,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:30:17,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:30:17,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655547973] [2023-12-02 15:30:17,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:30:17,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:30:17,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:30:17,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:30:17,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:30:17,978 INFO L87 Difference]: Start difference. First operand 143 states and 162 transitions. Second operand has 8 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:30:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:30:19,035 INFO L93 Difference]: Finished difference Result 199 states and 204 transitions. [2023-12-02 15:30:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:30:19,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-12-02 15:30:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:30:19,037 INFO L225 Difference]: With dead ends: 199 [2023-12-02 15:30:19,038 INFO L226 Difference]: Without dead ends: 198 [2023-12-02 15:30:19,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:30:19,038 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 213 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:30:19,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 541 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 15:30:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-12-02 15:30:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 143. [2023-12-02 15:30:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.6263736263736264) internal successors, (148), 133 states have internal predecessors, (148), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:30:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 161 transitions. [2023-12-02 15:30:19,054 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 161 transitions. Word has length 31 [2023-12-02 15:30:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:30:19,054 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 161 transitions. [2023-12-02 15:30:19,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:30:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 161 transitions. [2023-12-02 15:30:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 15:30:19,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:30:19,056 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:30:19,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 15:30:19,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 15:30:19,257 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_33_to_42_0Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:30:19,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:30:19,257 INFO L85 PathProgramCache]: Analyzing trace with hash 787381976, now seen corresponding path program 1 times [2023-12-02 15:30:19,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:30:19,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434047307] [2023-12-02 15:30:19,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:30:19,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:30:19,269 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:30:19,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337178712] [2023-12-02 15:30:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:30:19,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:30:19,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:30:19,271 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:30:19,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:30:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:30:19,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 15:30:19,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:30:19,477 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:30:19,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2023-12-02 15:30:19,546 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 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:30:20,107 INFO L349 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2023-12-02 15:30:20,107 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 79 [2023-12-02 15:30:20,162 INFO L349 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2023-12-02 15:30:20,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 67 [2023-12-02 15:30:20,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 15:30:20,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 53 treesize of output 42 [2023-12-02 15:30:20,859 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 59 treesize of output 35 [2023-12-02 15:30:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:30:20,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:30:21,039 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_266 (Array Int Int))) (< (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#r~0#1.base| v_ArrVal_266) |c_ULTIMATE.start_main_~#u~0#1.base|) |c_ULTIMATE.start_main_~#u~0#1.offset|))) (* .cse0 .cse0)) 9223372036854775808)) is different from false [2023-12-02 15:30:25,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:30:25,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434047307] [2023-12-02 15:30:25,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:30:25,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337178712] [2023-12-02 15:30:25,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337178712] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:30:25,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061725186] [2023-12-02 15:30:25,662 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-12-02 15:30:25,662 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:30:25,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:30:25,663 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:30:25,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:30:26,493 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_33_to_42_0 with input of size 136 for LOIs [2023-12-02 15:30:26,823 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 182 for LOIs [2023-12-02 15:30:26,916 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:31:12,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2061725186] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:31:12,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:31:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [11] total 26 [2023-12-02 15:31:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285004366] [2023-12-02 15:31:12,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:31:12,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 15:31:12,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:31:12,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 15:31:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=865, Unknown=10, NotChecked=62, Total=1122 [2023-12-02 15:31:12,110 INFO L87 Difference]: Start difference. First operand 143 states and 161 transitions. Second operand has 17 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:31:18,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:31:23,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:31:25,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:31:27,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:31:30,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:31:32,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:31:34,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:31:36,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:31:38,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:31:41,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:03,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:07,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:11,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:13,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:15,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:18,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:20,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:21,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:23,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:26,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:28,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:30,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:32,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:34,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:36,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:37,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:39,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:42,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:43,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:46,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:49,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:50,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:53,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:55,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:57,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:32:58,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:33:00,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:33:02,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:33:04,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:33:05,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:05,080 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2023-12-02 15:33:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 15:33:05,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-12-02 15:33:05,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:05,081 INFO L225 Difference]: With dead ends: 198 [2023-12-02 15:33:05,082 INFO L226 Difference]: Without dead ends: 197 [2023-12-02 15:33:05,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=185, Invalid=865, Unknown=10, NotChecked=62, Total=1122 [2023-12-02 15:33:05,083 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 69 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 1 mSolverCounterUnsat, 46 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 46 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:05,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 919 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 754 Invalid, 46 Unknown, 0 Unchecked, 112.9s Time] [2023-12-02 15:33:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-12-02 15:33:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 143. [2023-12-02 15:33:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.6153846153846154) internal successors, (147), 133 states have internal predecessors, (147), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:33:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2023-12-02 15:33:05,095 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 32 [2023-12-02 15:33:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:05,095 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2023-12-02 15:33:05,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:33:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2023-12-02 15:33:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 15:33:05,096 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:05,096 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:05,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 15:33:05,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 15:33:05,297 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_33_to_42_0Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:33:05,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:05,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1360962379, now seen corresponding path program 1 times [2023-12-02 15:33:05,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:33:05,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631070498] [2023-12-02 15:33:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:05,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:33:05,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:33:05,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829710563] [2023-12-02 15:33:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:05,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:05,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:05,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 15:33:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:05,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 15:33:05,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:05,404 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 838 treesize of output 822 [2023-12-02 15:33:05,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:33:05,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-12-02 15:33:05,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2023-12-02 15:33:05,591 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 22 treesize of output 10 [2023-12-02 15:33:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:33:05,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:05,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:33:05,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631070498] [2023-12-02 15:33:05,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:33:05,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829710563] [2023-12-02 15:33:05,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829710563] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:05,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:05,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:33:05,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28524689] [2023-12-02 15:33:05,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:05,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:33:05,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:33:05,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:33:05,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:33:05,605 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:06,195 INFO L93 Difference]: Finished difference Result 197 states and 202 transitions. [2023-12-02 15:33:06,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:33:06,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2023-12-02 15:33:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:06,197 INFO L225 Difference]: With dead ends: 197 [2023-12-02 15:33:06,197 INFO L226 Difference]: Without dead ends: 196 [2023-12-02 15:33:06,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:33:06,198 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 166 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:06,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 463 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:33:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-12-02 15:33:06,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2023-12-02 15:33:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.6043956043956045) internal successors, (146), 133 states have internal predecessors, (146), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:33:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2023-12-02 15:33:06,210 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 33 [2023-12-02 15:33:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:06,210 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2023-12-02 15:33:06,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2023-12-02 15:33:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 15:33:06,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:06,212 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:06,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 15:33:06,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 15:33:06,412 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_33_to_42_0Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:33:06,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:06,413 INFO L85 PathProgramCache]: Analyzing trace with hash 759839354, now seen corresponding path program 1 times [2023-12-02 15:33:06,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:33:06,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305332177] [2023-12-02 15:33:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:06,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:33:06,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:33:06,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115020331] [2023-12-02 15:33:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:06,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:06,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:06,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:06,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 15:33:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:06,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 15:33:06,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:06,511 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 202 treesize of output 198 [2023-12-02 15:33:06,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-12-02 15:33:06,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:33:06,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 15:33:06,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:06,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:33:06,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2023-12-02 15:33:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:33:06,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:06,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:33:06,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305332177] [2023-12-02 15:33:06,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:33:06,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115020331] [2023-12-02 15:33:06,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115020331] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:06,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:06,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:33:06,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440798937] [2023-12-02 15:33:06,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:06,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:33:06,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:33:06,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:33:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:33:06,730 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:06,981 INFO L93 Difference]: Finished difference Result 196 states and 201 transitions. [2023-12-02 15:33:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:33:06,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-12-02 15:33:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:06,983 INFO L225 Difference]: With dead ends: 196 [2023-12-02 15:33:06,983 INFO L226 Difference]: Without dead ends: 195 [2023-12-02 15:33:06,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:33:06,984 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 195 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:06,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 502 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:33:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-02 15:33:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2023-12-02 15:33:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5934065934065933) internal successors, (145), 133 states have internal predecessors, (145), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:33:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2023-12-02 15:33:06,997 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 34 [2023-12-02 15:33:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:06,997 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2023-12-02 15:33:06,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2023-12-02 15:33:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 15:33:06,998 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:06,998 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:07,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 15:33:07,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 15:33:07,199 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_33_to_42_0Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:33:07,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:07,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2080183639, now seen corresponding path program 1 times [2023-12-02 15:33:07,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:33:07,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435381668] [2023-12-02 15:33:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:07,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:33:07,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:33:07,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65673964] [2023-12-02 15:33:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:07,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:07,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:07,210 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:07,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:33:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:07,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 15:33:07,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:07,322 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:33:07,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2023-12-02 15:33:07,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-12-02 15:33:07,476 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 20 treesize of output 15 [2023-12-02 15:33:07,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 20 treesize of output 15 [2023-12-02 15:33:07,592 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 26 treesize of output 14 [2023-12-02 15:33:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:33:07,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:07,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:33:07,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435381668] [2023-12-02 15:33:07,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:33:07,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65673964] [2023-12-02 15:33:07,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65673964] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:07,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:07,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:33:07,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600316243] [2023-12-02 15:33:07,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:07,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:33:07,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:33:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:33:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:33:07,657 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:08,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:08,126 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2023-12-02 15:33:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:33:08,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-12-02 15:33:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:08,128 INFO L225 Difference]: With dead ends: 195 [2023-12-02 15:33:08,128 INFO L226 Difference]: Without dead ends: 194 [2023-12-02 15:33:08,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:33:08,129 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 216 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:08,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 549 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:33:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-02 15:33:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 143. [2023-12-02 15:33:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5824175824175823) internal successors, (144), 133 states have internal predecessors, (144), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:33:08,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2023-12-02 15:33:08,142 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 35 [2023-12-02 15:33:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:08,142 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2023-12-02 15:33:08,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2023-12-02 15:33:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 15:33:08,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:08,143 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:08,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 15:33:08,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 15:33:08,344 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_33_to_42_0Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:33:08,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:08,344 INFO L85 PathProgramCache]: Analyzing trace with hash 61183516, now seen corresponding path program 1 times [2023-12-02 15:33:08,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:33:08,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441144462] [2023-12-02 15:33:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:08,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:33:08,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:33:08,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821257813] [2023-12-02 15:33:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:08,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:08,355 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:08,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 15:33:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:08,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 15:33:08,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:08,446 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 250 treesize of output 242 [2023-12-02 15:33:08,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-12-02 15:33:08,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-12-02 15:33:08,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2023-12-02 15:33:08,613 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 22 treesize of output 10 [2023-12-02 15:33:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:33:08,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:08,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:33:08,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441144462] [2023-12-02 15:33:08,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:33:08,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821257813] [2023-12-02 15:33:08,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821257813] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:08,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:08,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:33:08,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906889086] [2023-12-02 15:33:08,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:08,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:33:08,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:33:08,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:33:08,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:33:08,656 INFO L87 Difference]: Start difference. First operand 143 states and 157 transitions. Second operand has 8 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:09,059 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2023-12-02 15:33:09,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:33:09,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-12-02 15:33:09,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:09,061 INFO L225 Difference]: With dead ends: 194 [2023-12-02 15:33:09,061 INFO L226 Difference]: Without dead ends: 193 [2023-12-02 15:33:09,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:33:09,062 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 154 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:09,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 545 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:33:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-12-02 15:33:09,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 143. [2023-12-02 15:33:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5714285714285714) internal successors, (143), 133 states have internal predecessors, (143), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:33:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2023-12-02 15:33:09,074 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 36 [2023-12-02 15:33:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:09,074 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2023-12-02 15:33:09,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2023-12-02 15:33:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 15:33:09,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:09,075 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:09,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 15:33:09,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:09,276 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting func_to_recursive_line_33_to_42_0Err10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:33:09,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:09,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1896689145, now seen corresponding path program 1 times [2023-12-02 15:33:09,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:33:09,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207415518] [2023-12-02 15:33:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:09,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:33:09,285 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:33:09,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705630357] [2023-12-02 15:33:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:09,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:09,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:09,286 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:09,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 15:33:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:09,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 15:33:09,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:09,370 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:33:09,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2023-12-02 15:33:09,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-12-02 15:33:09,563 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 18 treesize of output 13 [2023-12-02 15:33:09,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 18 treesize of output 13 [2023-12-02 15:33:09,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-02 15:33:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:33:09,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:09,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:33:09,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207415518] [2023-12-02 15:33:09,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:33:09,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705630357] [2023-12-02 15:33:09,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705630357] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:09,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:09,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:33:09,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303386276] [2023-12-02 15:33:09,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:33:09,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:33:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:33:09,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:33:09,715 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 8 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:10,015 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2023-12-02 15:33:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:33:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-12-02 15:33:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:10,017 INFO L225 Difference]: With dead ends: 193 [2023-12-02 15:33:10,017 INFO L226 Difference]: Without dead ends: 192 [2023-12-02 15:33:10,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:33:10,018 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 215 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:10,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 425 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:33:10,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-12-02 15:33:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 143. [2023-12-02 15:33:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5604395604395604) internal successors, (142), 133 states have internal predecessors, (142), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:33:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2023-12-02 15:33:10,030 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 37 [2023-12-02 15:33:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:10,030 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2023-12-02 15:33:10,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:10,030 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2023-12-02 15:33:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 15:33:10,031 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:10,031 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:10,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 15:33:10,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 15:33:10,232 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting func_to_recursive_line_33_to_42_0Err11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:33:10,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1332178498, now seen corresponding path program 1 times [2023-12-02 15:33:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:33:10,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777066795] [2023-12-02 15:33:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:10,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:33:10,241 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:33:10,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055647037] [2023-12-02 15:33:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:10,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:10,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:10,243 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:10,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 15:33:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:10,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 15:33:10,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:10,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 100 [2023-12-02 15:33:10,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 1 [2023-12-02 15:33:10,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:33:10,608 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-12-02 15:33:10,608 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 2 case distinctions, treesize of input 36 treesize of output 36 [2023-12-02 15:33:10,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:33:10,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2023-12-02 15:33:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:33:10,836 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:10,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:33:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777066795] [2023-12-02 15:33:10,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:33:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055647037] [2023-12-02 15:33:10,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055647037] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:10,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:10,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:33:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485078866] [2023-12-02 15:33:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:10,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:33:10,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:33:10,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:33:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:33:10,838 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:11,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:11,342 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2023-12-02 15:33:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:33:11,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-12-02 15:33:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:11,344 INFO L225 Difference]: With dead ends: 192 [2023-12-02 15:33:11,344 INFO L226 Difference]: Without dead ends: 191 [2023-12-02 15:33:11,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:33:11,345 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 179 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:11,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 497 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:33:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-02 15:33:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 143. [2023-12-02 15:33:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5494505494505495) internal successors, (141), 133 states have internal predecessors, (141), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:33:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2023-12-02 15:33:11,357 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 38 [2023-12-02 15:33:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:11,357 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2023-12-02 15:33:11,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2023-12-02 15:33:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 15:33:11,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:11,358 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:11,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 15:33:11,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:11,559 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting func_to_recursive_line_33_to_42_0Err12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:33:11,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:11,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1652139675, now seen corresponding path program 1 times [2023-12-02 15:33:11,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:33:11,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23221980] [2023-12-02 15:33:11,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:11,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:33:11,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:33:11,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876865490] [2023-12-02 15:33:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:11,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:11,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:11,570 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:11,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 15:33:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:11,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 15:33:11,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:11,672 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 96 treesize of output 94 [2023-12-02 15:33:11,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-12-02 15:33:11,753 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 36 treesize of output 17 [2023-12-02 15:33:11,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:33:11,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:11,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:33:11,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:33:11,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:33:11,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2023-12-02 15:33:12,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:33:12,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-12-02 15:33:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:33:12,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:33:12,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:33:12,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23221980] [2023-12-02 15:33:12,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:33:12,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876865490] [2023-12-02 15:33:12,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876865490] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:33:12,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:33:12,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 15:33:12,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450123166] [2023-12-02 15:33:12,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:33:12,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:33:12,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:33:12,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:33:12,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:33:12,113 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:33:12,558 INFO L93 Difference]: Finished difference Result 191 states and 196 transitions. [2023-12-02 15:33:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:33:12,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-12-02 15:33:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:33:12,560 INFO L225 Difference]: With dead ends: 191 [2023-12-02 15:33:12,560 INFO L226 Difference]: Without dead ends: 190 [2023-12-02 15:33:12,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-12-02 15:33:12,561 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 253 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:33:12,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 544 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:33:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-12-02 15:33:12,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2023-12-02 15:33:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5384615384615385) internal successors, (140), 133 states have internal predecessors, (140), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:33:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2023-12-02 15:33:12,581 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 39 [2023-12-02 15:33:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:33:12,581 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2023-12-02 15:33:12,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:33:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2023-12-02 15:33:12,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 15:33:12,582 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:33:12,582 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:33:12,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 15:33:12,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:12,782 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting func_to_recursive_line_33_to_42_0Err13ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:33:12,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:33:12,783 INFO L85 PathProgramCache]: Analyzing trace with hash -323277472, now seen corresponding path program 1 times [2023-12-02 15:33:12,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:33:12,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479091969] [2023-12-02 15:33:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:12,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:33:12,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:33:12,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767215253] [2023-12-02 15:33:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:33:12,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:33:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:33:12,794 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:33:12,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 15:33:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:33:12,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-02 15:33:12,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:33:12,959 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:33:12,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2023-12-02 15:33:13,017 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 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:33:13,509 INFO L349 Elim1Store]: treesize reduction 86, result has 39.9 percent of original size [2023-12-02 15:33:13,509 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 3 case distinctions, treesize of input 65 treesize of output 92 [2023-12-02 15:33:13,729 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 60 treesize of output 52 [2023-12-02 15:33:15,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 73 treesize of output 41 [2023-12-02 15:33:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:33:15,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:33:15,742 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_585 (Array Int Int))) (let ((.cse2 (store (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#u~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#u~0#1.base|) |c_ULTIMATE.start_main_~#u~0#1.offset| (+ (* |c_ULTIMATE.start_main_~R~0#1| 2) 1))))) (store .cse4 |c_ULTIMATE.start_main_~#v~0#1.base| (store (select .cse4 |c_ULTIMATE.start_main_~#v~0#1.base|) |c_ULTIMATE.start_main_~#v~0#1.offset| 1))) |c_ULTIMATE.start_main_~#r~0#1.base| v_ArrVal_585))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~#u~0#1.base|) |c_ULTIMATE.start_main_~#u~0#1.offset|))) (let ((.cse0 (* .cse3 .cse3))) (or (< .cse0 (+ 9223372036854775808 (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~#v~0#1.base|) |c_ULTIMATE.start_main_~#v~0#1.offset|))) (* .cse1 .cse1)) (* .cse3 2))) (< 9223372036854775807 .cse0)))))) is different from false [2023-12-02 15:33:16,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:33:16,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479091969] [2023-12-02 15:33:16,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:33:16,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767215253] [2023-12-02 15:33:16,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767215253] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:33:16,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54331090] [2023-12-02 15:33:16,279 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2023-12-02 15:33:16,279 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:33:16,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:33:16,279 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:33:16,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:33:16,999 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_33_to_42_0 with input of size 136 for LOIs [2023-12-02 15:33:17,798 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 182 for LOIs [2023-12-02 15:33:17,908 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:34:25,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [54331090] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:34:25,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:34:25,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [13] total 30 [2023-12-02 15:34:25,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178701626] [2023-12-02 15:34:25,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:34:25,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 15:34:25,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:34:25,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 15:34:25,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1240, Unknown=11, NotChecked=74, Total=1560 [2023-12-02 15:34:25,969 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 19 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:34:28,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:34:36,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:34:40,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:34:43,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:34:45,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:34:47,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:34:49,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:34:51,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:34:53,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:34:56,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:34:58,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:20,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:22,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:25,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:27,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:29,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:32,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:33,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:36,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:39,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:40,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:42,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:43,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:45,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:48,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:50,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:53,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:55,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:57,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:58,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:35:59,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:36:01,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:36:03,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:36:05,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:36:11,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:36:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:12,006 INFO L93 Difference]: Finished difference Result 190 states and 195 transitions. [2023-12-02 15:36:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 15:36:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2023-12-02 15:36:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:12,007 INFO L225 Difference]: With dead ends: 190 [2023-12-02 15:36:12,007 INFO L226 Difference]: Without dead ends: 189 [2023-12-02 15:36:12,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 73.9s TimeCoverageRelationStatistics Valid=235, Invalid=1240, Unknown=11, NotChecked=74, Total=1560 [2023-12-02 15:36:12,008 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 72 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 3 mSolverCounterUnsat, 45 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 45 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:12,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 785 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 630 Invalid, 45 Unknown, 0 Unchecked, 101.7s Time] [2023-12-02 15:36:12,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-02 15:36:12,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 143. [2023-12-02 15:36:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5274725274725274) internal successors, (139), 133 states have internal predecessors, (139), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:36:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2023-12-02 15:36:12,023 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 40 [2023-12-02 15:36:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:12,023 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2023-12-02 15:36:12,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:36:12,023 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2023-12-02 15:36:12,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 15:36:12,024 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:12,024 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:36:12,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 15:36:12,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 15:36:12,225 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting func_to_recursive_line_33_to_42_0Err14ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:36:12,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1431666883, now seen corresponding path program 1 times [2023-12-02 15:36:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:12,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203147149] [2023-12-02 15:36:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:12,235 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:12,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866731770] [2023-12-02 15:36:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:12,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:12,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:12,236 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:12,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 15:36:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:12,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 15:36:12,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:12,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 414 treesize of output 406 [2023-12-02 15:36:12,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-12-02 15:36:12,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-12-02 15:36:12,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2023-12-02 15:36:12,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 15:36:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:36:12,530 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:36:12,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:12,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203147149] [2023-12-02 15:36:12,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:12,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866731770] [2023-12-02 15:36:12,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866731770] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:36:12,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:36:12,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:36:12,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891188147] [2023-12-02 15:36:12,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:36:12,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:36:12,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:12,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:36:12,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:36:12,532 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 8 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:36:12,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:12,767 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2023-12-02 15:36:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:36:12,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-12-02 15:36:12,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:12,768 INFO L225 Difference]: With dead ends: 189 [2023-12-02 15:36:12,768 INFO L226 Difference]: Without dead ends: 188 [2023-12-02 15:36:12,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:36:12,769 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 191 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:12,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 487 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:36:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-12-02 15:36:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 143. [2023-12-02 15:36:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 133 states have internal predecessors, (138), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:36:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2023-12-02 15:36:12,784 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 41 [2023-12-02 15:36:12,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:12,785 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2023-12-02 15:36:12,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:36:12,785 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2023-12-02 15:36:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 15:36:12,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:12,786 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:36:12,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 15:36:12,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 15:36:12,986 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting func_to_recursive_line_33_to_42_0Err15ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:36:12,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1432000254, now seen corresponding path program 1 times [2023-12-02 15:36:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:12,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854585210] [2023-12-02 15:36:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:12,997 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:12,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868302437] [2023-12-02 15:36:12,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:12,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:12,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:12,998 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:12,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 15:36:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:13,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 15:36:13,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:13,090 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 152 treesize of output 144 [2023-12-02 15:36:13,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-12-02 15:36:13,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 15:36:13,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:36:13,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2023-12-02 15:36:13,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 15:36:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:36:13,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:36:13,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:13,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854585210] [2023-12-02 15:36:13,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:13,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868302437] [2023-12-02 15:36:13,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868302437] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:36:13,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:36:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:36:13,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243441554] [2023-12-02 15:36:13,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:36:13,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:36:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:36:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:36:13,333 INFO L87 Difference]: Start difference. First operand 143 states and 151 transitions. Second operand has 8 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:36:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:13,603 INFO L93 Difference]: Finished difference Result 188 states and 193 transitions. [2023-12-02 15:36:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:36:13,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-12-02 15:36:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:13,604 INFO L225 Difference]: With dead ends: 188 [2023-12-02 15:36:13,604 INFO L226 Difference]: Without dead ends: 187 [2023-12-02 15:36:13,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:36:13,605 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 122 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:13,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 570 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:36:13,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-12-02 15:36:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 143. [2023-12-02 15:36:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 133 states have internal predecessors, (137), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:36:13,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 150 transitions. [2023-12-02 15:36:13,622 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 150 transitions. Word has length 42 [2023-12-02 15:36:13,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:13,623 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 150 transitions. [2023-12-02 15:36:13,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:36:13,623 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 150 transitions. [2023-12-02 15:36:13,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 15:36:13,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:13,623 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:36:13,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 15:36:13,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:13,824 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting func_to_recursive_line_33_to_42_0Err16ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:36:13,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1442334753, now seen corresponding path program 1 times [2023-12-02 15:36:13,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:13,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206478414] [2023-12-02 15:36:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:13,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:13,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:13,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389713821] [2023-12-02 15:36:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:13,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:13,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:13,836 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:13,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 15:36:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:13,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 15:36:13,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:13,934 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 130 treesize of output 126 [2023-12-02 15:36:14,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-12-02 15:36:14,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-12-02 15:36:14,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2023-12-02 15:36:14,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 15:36:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:36:14,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:36:14,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206478414] [2023-12-02 15:36:14,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389713821] [2023-12-02 15:36:14,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389713821] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:36:14,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:36:14,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:36:14,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99484310] [2023-12-02 15:36:14,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:36:14,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:36:14,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:36:14,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:36:14,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:36:14,193 INFO L87 Difference]: Start difference. First operand 143 states and 150 transitions. Second operand has 9 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:36:14,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:36:14,592 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2023-12-02 15:36:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:36:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-12-02 15:36:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:36:14,593 INFO L225 Difference]: With dead ends: 187 [2023-12-02 15:36:14,593 INFO L226 Difference]: Without dead ends: 186 [2023-12-02 15:36:14,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:36:14,594 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 118 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:36:14,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 627 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:36:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-12-02 15:36:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 143. [2023-12-02 15:36:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.4945054945054945) internal successors, (136), 133 states have internal predecessors, (136), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:36:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 149 transitions. [2023-12-02 15:36:14,609 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 149 transitions. Word has length 43 [2023-12-02 15:36:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:36:14,609 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 149 transitions. [2023-12-02 15:36:14,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.285714285714286) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 15:36:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 149 transitions. [2023-12-02 15:36:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 15:36:14,609 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:36:14,610 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:36:14,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 15:36:14,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:14,810 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting func_to_recursive_line_33_to_42_0Err17ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:36:14,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:36:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1762704220, now seen corresponding path program 1 times [2023-12-02 15:36:14,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:36:14,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279971691] [2023-12-02 15:36:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:36:14,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:36:14,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514731794] [2023-12-02 15:36:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:36:14,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:36:14,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:36:14,821 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:36:14,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 15:36:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:36:14,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-02 15:36:14,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:36:14,975 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:36:14,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 86 [2023-12-02 15:36:15,022 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 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:36:15,612 INFO L349 Elim1Store]: treesize reduction 86, result has 39.9 percent of original size [2023-12-02 15:36:15,612 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 3 case distinctions, treesize of input 65 treesize of output 92 [2023-12-02 15:36:15,806 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 60 treesize of output 52 [2023-12-02 15:36:16,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 73 treesize of output 41 [2023-12-02 15:36:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:36:17,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:36:26,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:36:26,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279971691] [2023-12-02 15:36:26,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:36:26,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514731794] [2023-12-02 15:36:26,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514731794] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:36:26,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35343247] [2023-12-02 15:36:26,217 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-12-02 15:36:26,217 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:36:26,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:36:26,217 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:36:26,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:36:27,042 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_33_to_42_0 with input of size 136 for LOIs [2023-12-02 15:36:28,087 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 178 for LOIs [2023-12-02 15:36:28,180 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:37:52,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [35343247] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:37:52,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:37:52,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [13] total 31 [2023-12-02 15:37:52,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194304466] [2023-12-02 15:37:52,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:37:52,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 15:37:52,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:37:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 15:37:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1446, Unknown=8, NotChecked=0, Total=1722 [2023-12-02 15:37:52,335 INFO L87 Difference]: Start difference. First operand 143 states and 149 transitions. Second operand has 20 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:37:56,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:37:59,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:01,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:04,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:06,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:08,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:11,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:13,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:15,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:31,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:35,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:38,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:40,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:42,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:45,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:46,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:48,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:51,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:53,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:55,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:57,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:38:59,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:01,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:03,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:05,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:07,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:09,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:11,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:12,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:14,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:16,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:18,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:20,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:22,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:24,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:26,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:28,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:39:28,737 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2023-12-02 15:39:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 15:39:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2023-12-02 15:39:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:39:28,738 INFO L225 Difference]: With dead ends: 186 [2023-12-02 15:39:28,738 INFO L226 Difference]: Without dead ends: 185 [2023-12-02 15:39:28,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 91.7s TimeCoverageRelationStatistics Valid=268, Invalid=1446, Unknown=8, NotChecked=0, Total=1722 [2023-12-02 15:39:28,740 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 91 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 4 mSolverCounterUnsat, 43 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 43 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:39:28,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 688 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 562 Invalid, 43 Unknown, 0 Unchecked, 96.3s Time] [2023-12-02 15:39:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-02 15:39:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 143. [2023-12-02 15:39:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.4835164835164836) internal successors, (135), 133 states have internal predecessors, (135), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:39:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2023-12-02 15:39:28,762 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 44 [2023-12-02 15:39:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:39:28,762 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2023-12-02 15:39:28,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:39:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2023-12-02 15:39:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 15:39:28,763 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:39:28,763 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:39:28,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 15:39:28,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 15:39:28,964 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting func_to_recursive_line_33_to_42_0Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:39:28,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:39:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1024085947, now seen corresponding path program 1 times [2023-12-02 15:39:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:39:28,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936359800] [2023-12-02 15:39:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:39:28,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:39:28,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:39:28,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872195628] [2023-12-02 15:39:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:39:28,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:39:28,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:39:28,975 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:39:28,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 15:39:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:39:29,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 15:39:29,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:39:29,092 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 15:39:29,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 87 [2023-12-02 15:39:29,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:39:29,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-12-02 15:39:29,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2023-12-02 15:39:29,426 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-12-02 15:39:29,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 23 treesize of output 15 [2023-12-02 15:39:33,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:39:33,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 172 treesize of output 328 [2023-12-02 15:39:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:39:36,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:39:36,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:39:36,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936359800] [2023-12-02 15:39:36,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:39:36,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872195628] [2023-12-02 15:39:36,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872195628] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:39:36,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:39:36,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-12-02 15:39:36,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014071202] [2023-12-02 15:39:36,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:39:36,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 15:39:36,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:39:36,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 15:39:36,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=193, Unknown=2, NotChecked=0, Total=240 [2023-12-02 15:39:36,101 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:39:39,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:39:41,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:43,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:46,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:50,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:53,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:55,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:57,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:39:59,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:01,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:03,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:05,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:12,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:22,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:24,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:26,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:37,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:40,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:42,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:44,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:46,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:40:49,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:40:51,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:40:53,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:40:55,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:40:58,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:00,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:02,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:04,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:06,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:08,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:10,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:12,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:41:12,906 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2023-12-02 15:41:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 15:41:12,907 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-12-02 15:41:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:41:12,909 INFO L225 Difference]: With dead ends: 195 [2023-12-02 15:41:12,909 INFO L226 Difference]: Without dead ends: 194 [2023-12-02 15:41:12,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=135, Invalid=556, Unknown=11, NotChecked=0, Total=702 [2023-12-02 15:41:12,910 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 166 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 14 mSolverCounterUnsat, 33 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 33 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:41:12,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 838 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 445 Invalid, 33 Unknown, 0 Unchecked, 74.2s Time] [2023-12-02 15:41:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-02 15:41:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 147. [2023-12-02 15:41:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 94 states have (on average 1.4787234042553192) internal successors, (139), 136 states have internal predecessors, (139), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 15:41:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 152 transitions. [2023-12-02 15:41:12,943 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 152 transitions. Word has length 51 [2023-12-02 15:41:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:41:12,944 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 152 transitions. [2023-12-02 15:41:12,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:41:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 152 transitions. [2023-12-02 15:41:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 15:41:12,944 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:41:12,945 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:41:12,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 15:41:13,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:41:13,145 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting func_to_recursive_line_33_to_42_0Err18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:41:13,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:41:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1024086267, now seen corresponding path program 1 times [2023-12-02 15:41:13,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:41:13,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839466933] [2023-12-02 15:41:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:41:13,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:41:13,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:41:13,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759691943] [2023-12-02 15:41:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:41:13,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:41:13,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:41:13,158 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:41:13,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 15:41:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:41:13,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:41:13,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:41:13,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:41:13,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-12-02 15:41:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:41:13,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:41:13,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:41:13,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839466933] [2023-12-02 15:41:13,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:41:13,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759691943] [2023-12-02 15:41:13,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759691943] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:41:13,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:41:13,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:41:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679759731] [2023-12-02 15:41:13,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:41:13,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:41:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:41:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:41:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:41:13,642 INFO L87 Difference]: Start difference. First operand 147 states and 152 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:41:15,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:18,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:20,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:22,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:24,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:41:24,630 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2023-12-02 15:41:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:41:24,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-12-02 15:41:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:41:24,633 INFO L225 Difference]: With dead ends: 149 [2023-12-02 15:41:24,633 INFO L226 Difference]: Without dead ends: 148 [2023-12-02 15:41:24,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:41:24,634 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 85 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:41:24,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 370 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 5 Unknown, 0 Unchecked, 10.9s Time] [2023-12-02 15:41:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-02 15:41:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-12-02 15:41:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.4631578947368422) internal successors, (139), 136 states have internal predecessors, (139), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 15:41:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2023-12-02 15:41:24,657 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 51 [2023-12-02 15:41:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:41:24,657 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2023-12-02 15:41:24,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:41:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2023-12-02 15:41:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 15:41:24,658 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:41:24,658 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:41:24,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 15:41:24,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:41:24,859 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting func_to_recursive_line_33_to_42_0Err23ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:41:24,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:41:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1681893099, now seen corresponding path program 1 times [2023-12-02 15:41:24,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:41:24,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433817442] [2023-12-02 15:41:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:41:24,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:41:24,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:41:24,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893447748] [2023-12-02 15:41:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:41:24,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:41:24,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:41:24,871 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:41:24,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 15:41:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:41:24,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:41:24,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:41:25,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:41:25,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-12-02 15:41:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:41:25,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:41:25,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:41:25,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433817442] [2023-12-02 15:41:25,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:41:25,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893447748] [2023-12-02 15:41:25,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893447748] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:41:25,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:41:25,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:41:25,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741660694] [2023-12-02 15:41:25,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:41:25,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:41:25,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:41:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:41:25,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:41:25,445 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:41:27,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:41:30,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:32,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:34,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:41:34,538 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2023-12-02 15:41:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:41:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2023-12-02 15:41:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:41:34,540 INFO L225 Difference]: With dead ends: 148 [2023-12-02 15:41:34,540 INFO L226 Difference]: Without dead ends: 147 [2023-12-02 15:41:34,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:41:34,541 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 104 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 9 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:41:34,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 368 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 177 Invalid, 4 Unknown, 0 Unchecked, 9.0s Time] [2023-12-02 15:41:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-12-02 15:41:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-12-02 15:41:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 95 states have (on average 1.4526315789473685) internal successors, (138), 135 states have internal predecessors, (138), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 15:41:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 152 transitions. [2023-12-02 15:41:34,563 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 152 transitions. Word has length 52 [2023-12-02 15:41:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:41:34,563 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 152 transitions. [2023-12-02 15:41:34,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:41:34,564 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 152 transitions. [2023-12-02 15:41:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 15:41:34,564 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:41:34,564 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:41:34,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-02 15:41:34,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:41:34,765 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting func_to_recursive_line_33_to_42_0Err19ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:41:34,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:41:34,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1681903029, now seen corresponding path program 1 times [2023-12-02 15:41:34,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:41:34,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248314607] [2023-12-02 15:41:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:41:34,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:41:34,776 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:41:34,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122087056] [2023-12-02 15:41:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:41:34,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:41:34,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:41:34,777 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:41:34,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 15:41:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:41:34,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 15:41:34,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:41:34,912 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 60 treesize of output 58 [2023-12-02 15:41:35,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:41:35,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-12-02 15:41:35,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 11 [2023-12-02 15:41:37,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 13 [2023-12-02 15:41:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:41:37,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:41:37,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:41:37,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248314607] [2023-12-02 15:41:37,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:41:37,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122087056] [2023-12-02 15:41:37,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122087056] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:41:37,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:41:37,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:41:37,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415701824] [2023-12-02 15:41:37,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:41:37,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:41:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:41:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:41:37,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:41:37,494 INFO L87 Difference]: Start difference. First operand 147 states and 152 transitions. Second operand has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:41:40,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:42,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:45,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:47,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:49,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:51,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:41:51,226 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2023-12-02 15:41:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:41:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2023-12-02 15:41:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:41:51,228 INFO L225 Difference]: With dead ends: 192 [2023-12-02 15:41:51,228 INFO L226 Difference]: Without dead ends: 191 [2023-12-02 15:41:51,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:41:51,229 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 153 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 10 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:41:51,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 502 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 179 Invalid, 6 Unknown, 0 Unchecked, 13.2s Time] [2023-12-02 15:41:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-02 15:41:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 149. [2023-12-02 15:41:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 97 states have (on average 1.443298969072165) internal successors, (140), 137 states have internal predecessors, (140), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 15:41:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2023-12-02 15:41:51,253 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 52 [2023-12-02 15:41:51,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:41:51,253 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2023-12-02 15:41:51,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:41:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2023-12-02 15:41:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 15:41:51,254 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:41:51,254 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:41:51,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 15:41:51,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:41:51,455 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:41:51,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:41:51,455 INFO L85 PathProgramCache]: Analyzing trace with hash -599571318, now seen corresponding path program 1 times [2023-12-02 15:41:51,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:41:51,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426730972] [2023-12-02 15:41:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:41:51,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:41:51,467 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:41:51,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797906045] [2023-12-02 15:41:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:41:51,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:41:51,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:41:51,468 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:41:51,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 15:41:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:41:51,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 15:41:51,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:41:51,637 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 15:41:51,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2023-12-02 15:41:51,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:41:52,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2023-12-02 15:41:52,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:41:52,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 15:41:52,875 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 15:41:52,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 44 [2023-12-02 15:41:53,032 INFO L349 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2023-12-02 15:41:53,032 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 2 case distinctions, treesize of input 49 treesize of output 34 [2023-12-02 15:41:53,056 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 20 treesize of output 5 [2023-12-02 15:41:53,407 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:41:53,407 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 1 case distinctions, treesize of input 25 treesize of output 23 [2023-12-02 15:41:53,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:41:53,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2023-12-02 15:41:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:41:54,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:41:54,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:41:54,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426730972] [2023-12-02 15:41:54,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:41:54,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797906045] [2023-12-02 15:41:54,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797906045] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:41:54,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:41:54,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 15:41:54,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467892387] [2023-12-02 15:41:54,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:41:54,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:41:54,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:41:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:41:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:41:54,006 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 15:41:57,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:41:59,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:42:01,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:42:03,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:42:05,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:42:07,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:42:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:42:07,874 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2023-12-02 15:42:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:42:07,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2023-12-02 15:42:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:42:07,876 INFO L225 Difference]: With dead ends: 183 [2023-12-02 15:42:07,876 INFO L226 Difference]: Without dead ends: 182 [2023-12-02 15:42:07,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:42:07,877 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 168 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 16 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:42:07,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 613 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 203 Invalid, 15 Unknown, 0 Unchecked, 13.3s Time] [2023-12-02 15:42:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-12-02 15:42:07,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 151. [2023-12-02 15:42:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 99 states have (on average 1.4343434343434343) internal successors, (142), 138 states have internal predecessors, (142), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 15:42:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2023-12-02 15:42:07,909 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 53 [2023-12-02 15:42:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:42:07,909 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2023-12-02 15:42:07,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 15:42:07,909 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2023-12-02 15:42:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 15:42:07,910 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:07,910 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:42:07,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 15:42:08,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 15:42:08,111 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting func_to_recursive_line_33_to_42_0Err24ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:42:08,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:08,111 INFO L85 PathProgramCache]: Analyzing trace with hash -599078329, now seen corresponding path program 1 times [2023-12-02 15:42:08,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:08,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255892081] [2023-12-02 15:42:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:08,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:08,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:42:08,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556246270] [2023-12-02 15:42:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:08,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:42:08,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:42:08,128 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:42:08,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 15:42:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:08,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 15:42:08,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:42:08,596 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 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 15:42:09,935 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2023-12-02 15:42:09,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 34 [2023-12-02 15:42:09,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:42:09,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2023-12-02 15:42:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:42:10,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:42:10,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:10,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255892081] [2023-12-02 15:42:10,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:42:10,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556246270] [2023-12-02 15:42:10,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556246270] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:42:10,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:42:10,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:42:10,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740306859] [2023-12-02 15:42:10,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:42:10,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:42:10,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:42:10,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:42:10,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:42:10,160 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:42:12,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:42:14,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:17,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:42:19,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:42:21,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:42:23,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:42:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:42:24,150 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2023-12-02 15:42:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:42:24,150 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2023-12-02 15:42:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:42:24,152 INFO L225 Difference]: With dead ends: 151 [2023-12-02 15:42:24,152 INFO L226 Difference]: Without dead ends: 150 [2023-12-02 15:42:24,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:42:24,153 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 189 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 14 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:42:24,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 440 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 257 Invalid, 6 Unknown, 0 Unchecked, 13.3s Time] [2023-12-02 15:42:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-12-02 15:42:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-12-02 15:42:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 99 states have (on average 1.4242424242424243) internal successors, (141), 137 states have internal predecessors, (141), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 15:42:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2023-12-02 15:42:24,177 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 53 [2023-12-02 15:42:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:42:24,177 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2023-12-02 15:42:24,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:42:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2023-12-02 15:42:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 15:42:24,177 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:24,178 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:42:24,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 15:42:24,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 15:42:24,378 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting func_to_recursive_line_33_to_42_0Err20ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 53 more)] === [2023-12-02 15:42:24,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash -599386169, now seen corresponding path program 1 times [2023-12-02 15:42:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:24,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926590909] [2023-12-02 15:42:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:24,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:24,394 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:42:24,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356078057] [2023-12-02 15:42:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:24,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:42:24,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:42:24,395 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:42:24,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222b83a8-366d-4aa9-9f77-d6587a6c82ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 15:42:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:24,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 15:42:24,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:42:24,512 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 202 treesize of output 198 [2023-12-02 15:42:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:42:29,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-12-02 15:42:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:42:32,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:42:32,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926590909] [2023-12-02 15:42:32,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:42:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356078057] [2023-12-02 15:42:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356078057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:42:32,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:42:32,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:42:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661343114] [2023-12-02 15:42:32,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:42:32,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:42:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:42:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:42:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2023-12-02 15:42:32,511 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand has 10 states, 8 states have (on average 5.625) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 15:42:34,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:42,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 15:42:43,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]