./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/no-overflow.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4a9aad6636e75eb788a44e63e1649ee5df89ecae877c31a886978a8e3fdd2e8f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 14:01:45,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 14:01:45,940 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-10-13 14:01:45,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 14:01:45,945 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 14:01:45,977 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 14:01:45,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 14:01:45,978 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 14:01:45,979 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 14:01:45,979 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 14:01:45,980 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 14:01:45,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 14:01:45,981 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 14:01:45,981 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 14:01:45,982 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 14:01:45,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 14:01:45,983 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 14:01:45,987 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 14:01:45,987 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 14:01:45,987 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 14:01:45,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 14:01:45,989 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 14:01:45,989 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 14:01:45,989 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 14:01:45,989 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 14:01:45,990 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-10-13 14:01:45,990 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 14:01:45,990 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 14:01:45,990 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 14:01:45,990 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 14:01:45,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 14:01:45,991 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 14:01:45,991 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 14:01:45,991 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 14:01:45,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 14:01:45,992 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 14:01:45,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 14:01:45,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 14:01:45,994 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 14:01:45,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 14:01:45,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 14:01:45,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 14:01:45,995 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 14:01:45,995 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 14:01:45,996 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a9aad6636e75eb788a44e63e1649ee5df89ecae877c31a886978a8e3fdd2e8f [2024-10-13 14:01:46,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 14:01:46,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 14:01:46,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 14:01:46,297 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 14:01:46,298 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 14:01:46,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c [2024-10-13 14:01:47,736 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 14:01:47,958 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 14:01:47,959 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c [2024-10-13 14:01:47,972 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/130d546e0/21b22e7a93ec454a8995adb2af2e2ded/FLAGd3563b35a [2024-10-13 14:01:48,318 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/130d546e0/21b22e7a93ec454a8995adb2af2e2ded [2024-10-13 14:01:48,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 14:01:48,321 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 14:01:48,324 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 14:01:48,324 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 14:01:48,329 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 14:01:48,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,331 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c37200b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48, skipping insertion in model container [2024-10-13 14:01:48,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,355 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 14:01:48,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 14:01:48,624 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 14:01:48,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 14:01:48,702 INFO L204 MainTranslator]: Completed translation [2024-10-13 14:01:48,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48 WrapperNode [2024-10-13 14:01:48,703 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 14:01:48,704 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 14:01:48,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 14:01:48,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 14:01:48,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,753 INFO L138 Inliner]: procedures = 17, calls = 172, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 185 [2024-10-13 14:01:48,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 14:01:48,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 14:01:48,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 14:01:48,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 14:01:48,768 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,776 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,807 INFO L175 MemorySlicer]: Split 138 memory accesses to 6 slices as follows [2, 35, 30, 22, 20, 29]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 3, 2, 2, 1, 3]. [2024-10-13 14:01:48,808 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,836 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,844 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,850 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,857 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 14:01:48,858 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 14:01:48,859 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 14:01:48,859 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 14:01:48,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (1/1) ... [2024-10-13 14:01:48,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 14:01:48,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:01:48,891 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 14:01:48,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 14:01:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 14:01:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_28_to_32_0 [2024-10-13 14:01:48,941 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_28_to_32_0 [2024-10-13 14:01:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 14:01:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 14:01:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 14:01:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 14:01:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-13 14:01:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-13 14:01:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 14:01:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 14:01:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 14:01:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 14:01:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 14:01:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-13 14:01:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-13 14:01:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 14:01:48,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 14:01:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 14:01:48,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 14:01:48,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 14:01:48,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 14:01:48,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-13 14:01:48,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-13 14:01:48,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-13 14:01:48,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-13 14:01:48,945 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_36_to_52_0 [2024-10-13 14:01:48,945 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_36_to_52_0 [2024-10-13 14:01:48,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 14:01:49,059 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 14:01:49,062 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 14:01:51,929 INFO L? ?]: Removed 1170 outVars from TransFormulas that were not future-live. [2024-10-13 14:01:51,929 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 14:01:51,986 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 14:01:51,990 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 14:01:51,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:01:51 BoogieIcfgContainer [2024-10-13 14:01:51,991 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 14:01:51,993 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 14:01:51,993 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 14:01:51,996 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 14:01:51,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:01:48" (1/3) ... [2024-10-13 14:01:51,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79debb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:01:51, skipping insertion in model container [2024-10-13 14:01:51,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:01:48" (2/3) ... [2024-10-13 14:01:51,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79debb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:01:51, skipping insertion in model container [2024-10-13 14:01:51,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:01:51" (3/3) ... [2024-10-13 14:01:52,000 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra.c [2024-10-13 14:01:52,017 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 14:01:52,017 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 258 error locations. [2024-10-13 14:01:52,105 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 14:01:52,111 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, 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;@66f279e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 14:01:52,112 INFO L334 AbstractCegarLoop]: Starting to check reachability of 258 error locations. [2024-10-13 14:01:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 556 states, 281 states have (on average 1.9395017793594307) internal successors, (545), 541 states have internal predecessors, (545), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-10-13 14:01:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 14:01:52,123 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:01:52,124 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 14:01:52,125 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_28_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:01:52,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:01:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1883854585, now seen corresponding path program 1 times [2024-10-13 14:01:52,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:01:52,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115923762] [2024-10-13 14:01:52,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:52,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:01:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:52,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:01:52,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115923762] [2024-10-13 14:01:52,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115923762] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:01:52,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:01:52,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 14:01:52,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164868720] [2024-10-13 14:01:52,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:01:52,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 14:01:52,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:01:52,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 14:01:52,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 14:01:52,779 INFO L87 Difference]: Start difference. First operand has 556 states, 281 states have (on average 1.9395017793594307) internal successors, (545), 541 states have internal predecessors, (545), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 7 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 14:01:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:01:53,091 INFO L93 Difference]: Finished difference Result 1112 states and 1155 transitions. [2024-10-13 14:01:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 14:01:53,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 14:01:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:01:53,111 INFO L225 Difference]: With dead ends: 1112 [2024-10-13 14:01:53,112 INFO L226 Difference]: Without dead ends: 562 [2024-10-13 14:01:53,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-13 14:01:53,130 INFO L432 NwaCegarLoop]: 558 mSDtfsCounter, 13 mSDsluCounter, 2143 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 14:01:53,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2701 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 14:01:53,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2024-10-13 14:01:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 559. [2024-10-13 14:01:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 285 states have (on average 1.9157894736842105) internal successors, (546), 544 states have internal predecessors, (546), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-10-13 14:01:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 571 transitions. [2024-10-13 14:01:53,199 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 571 transitions. Word has length 6 [2024-10-13 14:01:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:01:53,201 INFO L471 AbstractCegarLoop]: Abstraction has 559 states and 571 transitions. [2024-10-13 14:01:53,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 14:01:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 571 transitions. [2024-10-13 14:01:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-13 14:01:53,202 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:01:53,203 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:01:53,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 14:01:53,204 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:01:53,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:01:53,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1730049565, now seen corresponding path program 1 times [2024-10-13 14:01:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:01:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771172642] [2024-10-13 14:01:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:53,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:01:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:53,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:01:53,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771172642] [2024-10-13 14:01:53,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771172642] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:01:53,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:01:53,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 14:01:53,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111699088] [2024-10-13 14:01:53,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:01:53,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 14:01:53,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:01:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 14:01:53,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 14:01:53,388 INFO L87 Difference]: Start difference. First operand 559 states and 571 transitions. Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 14:01:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:01:53,576 INFO L93 Difference]: Finished difference Result 562 states and 575 transitions. [2024-10-13 14:01:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 14:01:53,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-13 14:01:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:01:53,579 INFO L225 Difference]: With dead ends: 562 [2024-10-13 14:01:53,579 INFO L226 Difference]: Without dead ends: 561 [2024-10-13 14:01:53,579 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-13 14:01:53,582 INFO L432 NwaCegarLoop]: 556 mSDtfsCounter, 10 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2688 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 14:01:53,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 2688 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 14:01:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2024-10-13 14:01:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 560. [2024-10-13 14:01:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 286 states have (on average 1.9125874125874125) internal successors, (547), 545 states have internal predecessors, (547), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-10-13 14:01:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 572 transitions. [2024-10-13 14:01:53,622 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 572 transitions. Word has length 7 [2024-10-13 14:01:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:01:53,622 INFO L471 AbstractCegarLoop]: Abstraction has 560 states and 572 transitions. [2024-10-13 14:01:53,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 14:01:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 572 transitions. [2024-10-13 14:01:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-13 14:01:53,627 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:01:53,627 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:01:53,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 14:01:53,627 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:01:53,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:01:53,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1172955234, now seen corresponding path program 1 times [2024-10-13 14:01:53,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:01:53,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742684381] [2024-10-13 14:01:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:53,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:01:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:53,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 14:01:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:53,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:01:53,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742684381] [2024-10-13 14:01:53,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742684381] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:01:53,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:01:53,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 14:01:53,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15351072] [2024-10-13 14:01:53,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:01:53,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 14:01:53,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:01:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 14:01:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-13 14:01:53,816 INFO L87 Difference]: Start difference. First operand 560 states and 572 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 14:01:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:01:54,343 INFO L93 Difference]: Finished difference Result 1086 states and 1107 transitions. [2024-10-13 14:01:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 14:01:54,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-10-13 14:01:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:01:54,348 INFO L225 Difference]: With dead ends: 1086 [2024-10-13 14:01:54,348 INFO L226 Difference]: Without dead ends: 1084 [2024-10-13 14:01:54,350 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-13 14:01:54,351 INFO L432 NwaCegarLoop]: 495 mSDtfsCounter, 1626 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 14:01:54,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1634 Valid, 2586 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 14:01:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2024-10-13 14:01:54,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 757. [2024-10-13 14:01:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 474 states have (on average 1.919831223628692) internal successors, (910), 733 states have internal predecessors, (910), 18 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2024-10-13 14:01:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 950 transitions. [2024-10-13 14:01:54,378 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 950 transitions. Word has length 11 [2024-10-13 14:01:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:01:54,378 INFO L471 AbstractCegarLoop]: Abstraction has 757 states and 950 transitions. [2024-10-13 14:01:54,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 14:01:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 950 transitions. [2024-10-13 14:01:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-13 14:01:54,379 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:01:54,379 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 14:01:54,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 14:01:54,379 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_28_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:01:54,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:01:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 982485849, now seen corresponding path program 1 times [2024-10-13 14:01:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:01:54,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780079191] [2024-10-13 14:01:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:01:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:54,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:01:54,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780079191] [2024-10-13 14:01:54,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780079191] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 14:01:54,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352544187] [2024-10-13 14:01:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:54,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:01:54,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:01:54,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:01:54,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 14:01:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:54,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 14:01:54,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:01:54,876 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 11 treesize of output 7 [2024-10-13 14:01:54,955 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 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-13 14:01:55,057 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 [2024-10-13 14:01:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:55,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 14:01:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:55,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352544187] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 14:01:55,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 14:01:55,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-13 14:01:55,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645311210] [2024-10-13 14:01:55,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 14:01:55,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 14:01:55,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:01:55,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 14:01:55,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-10-13 14:01:55,203 INFO L87 Difference]: Start difference. First operand 757 states and 950 transitions. Second operand has 21 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 14:01:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:01:55,705 INFO L93 Difference]: Finished difference Result 761 states and 960 transitions. [2024-10-13 14:01:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 14:01:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-13 14:01:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:01:55,709 INFO L225 Difference]: With dead ends: 761 [2024-10-13 14:01:55,709 INFO L226 Difference]: Without dead ends: 760 [2024-10-13 14:01:55,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2024-10-13 14:01:55,711 INFO L432 NwaCegarLoop]: 556 mSDtfsCounter, 29 mSDsluCounter, 5247 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 5803 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 14:01:55,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 5803 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 14:01:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-10-13 14:01:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 756. [2024-10-13 14:01:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 474 states have (on average 1.9177215189873418) internal successors, (909), 732 states have internal predecessors, (909), 18 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2024-10-13 14:01:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 949 transitions. [2024-10-13 14:01:55,733 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 949 transitions. Word has length 12 [2024-10-13 14:01:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:01:55,733 INFO L471 AbstractCegarLoop]: Abstraction has 756 states and 949 transitions. [2024-10-13 14:01:55,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 14:01:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 949 transitions. [2024-10-13 14:01:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-13 14:01:55,734 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:01:55,734 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:01:55,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 14:01:55,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:01:55,936 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_36_to_52_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:01:55,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:01:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1928547136, now seen corresponding path program 1 times [2024-10-13 14:01:55,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:01:55,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644776881] [2024-10-13 14:01:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:55,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:01:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:56,194 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 14:01:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:56,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:01:56,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644776881] [2024-10-13 14:01:56,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644776881] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:01:56,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:01:56,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 14:01:56,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877036980] [2024-10-13 14:01:56,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:01:56,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 14:01:56,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:01:56,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 14:01:56,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-13 14:01:56,212 INFO L87 Difference]: Start difference. First operand 756 states and 949 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 14:01:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:01:56,840 INFO L93 Difference]: Finished difference Result 1269 states and 1472 transitions. [2024-10-13 14:01:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 14:01:56,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-13 14:01:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:01:56,852 INFO L225 Difference]: With dead ends: 1269 [2024-10-13 14:01:56,852 INFO L226 Difference]: Without dead ends: 1267 [2024-10-13 14:01:56,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-13 14:01:56,854 INFO L432 NwaCegarLoop]: 495 mSDtfsCounter, 1600 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 3059 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 14:01:56,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 3059 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 14:01:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2024-10-13 14:01:56,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 950. [2024-10-13 14:01:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 660 states have (on average 1.9212121212121211) internal successors, (1268), 918 states have internal predecessors, (1268), 25 states have call successors, (25), 6 states have call predecessors, (25), 8 states have return successors, (30), 25 states have call predecessors, (30), 25 states have call successors, (30) [2024-10-13 14:01:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1323 transitions. [2024-10-13 14:01:56,886 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1323 transitions. Word has length 13 [2024-10-13 14:01:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:01:56,886 INFO L471 AbstractCegarLoop]: Abstraction has 950 states and 1323 transitions. [2024-10-13 14:01:56,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-13 14:01:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1323 transitions. [2024-10-13 14:01:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-13 14:01:56,887 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:01:56,887 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-13 14:01:56,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 14:01:56,887 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:01:56,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:01:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash 392290691, now seen corresponding path program 1 times [2024-10-13 14:01:56,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:01:56,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270246289] [2024-10-13 14:01:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:56,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:01:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:57,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:01:57,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270246289] [2024-10-13 14:01:57,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270246289] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 14:01:57,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141096786] [2024-10-13 14:01:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:57,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:01:57,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:01:57,121 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:01:57,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 14:01:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:57,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 14:01:57,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:01:57,237 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 11 treesize of output 7 [2024-10-13 14:01:57,275 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 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-13 14:01:57,353 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 32 treesize of output 20 [2024-10-13 14:01:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:57,363 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 14:01:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:57,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141096786] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 14:01:57,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 14:01:57,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-13 14:01:57,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16824987] [2024-10-13 14:01:57,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 14:01:57,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 14:01:57,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:01:57,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 14:01:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-10-13 14:01:57,483 INFO L87 Difference]: Start difference. First operand 950 states and 1323 transitions. Second operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 14:01:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:01:58,045 INFO L93 Difference]: Finished difference Result 981 states and 1362 transitions. [2024-10-13 14:01:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 14:01:58,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-13 14:01:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:01:58,052 INFO L225 Difference]: With dead ends: 981 [2024-10-13 14:01:58,052 INFO L226 Difference]: Without dead ends: 980 [2024-10-13 14:01:58,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-10-13 14:01:58,055 INFO L432 NwaCegarLoop]: 556 mSDtfsCounter, 64 mSDsluCounter, 5266 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 5822 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 14:01:58,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 5822 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 14:01:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2024-10-13 14:01:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 980. [2024-10-13 14:01:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 681 states have (on average 1.8972099853157123) internal successors, (1292), 942 states have internal predecessors, (1292), 28 states have call successors, (28), 9 states have call predecessors, (28), 14 states have return successors, (39), 28 states have call predecessors, (39), 28 states have call successors, (39) [2024-10-13 14:01:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1359 transitions. [2024-10-13 14:01:58,083 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1359 transitions. Word has length 13 [2024-10-13 14:01:58,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:01:58,084 INFO L471 AbstractCegarLoop]: Abstraction has 980 states and 1359 transitions. [2024-10-13 14:01:58,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 14:01:58,084 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1359 transitions. [2024-10-13 14:01:58,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-13 14:01:58,085 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:01:58,086 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:01:58,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 14:01:58,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 14:01:58,287 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_36_to_52_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:01:58,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:01:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1605524781, now seen corresponding path program 1 times [2024-10-13 14:01:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:01:58,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083738479] [2024-10-13 14:01:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:58,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:01:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 14:01:58,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604698371] [2024-10-13 14:01:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:58,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:01:58,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:01:58,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:01:58,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 14:01:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:58,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 14:01:58,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:01:58,416 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 11 treesize of output 7 [2024-10-13 14:01:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:01:58,516 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 14:01:58,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:01:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083738479] [2024-10-13 14:01:58,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 14:01:58,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604698371] [2024-10-13 14:01:58,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604698371] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:01:58,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:01:58,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 14:01:58,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933706519] [2024-10-13 14:01:58,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:01:58,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 14:01:58,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:01:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 14:01:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-13 14:01:58,518 INFO L87 Difference]: Start difference. First operand 980 states and 1359 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 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) [2024-10-13 14:01:58,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:01:58,893 INFO L93 Difference]: Finished difference Result 1315 states and 1520 transitions. [2024-10-13 14:01:58,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 14:01:58,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 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 21 [2024-10-13 14:01:58,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:01:58,899 INFO L225 Difference]: With dead ends: 1315 [2024-10-13 14:01:58,899 INFO L226 Difference]: Without dead ends: 1313 [2024-10-13 14:01:58,899 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-13 14:01:58,900 INFO L432 NwaCegarLoop]: 522 mSDtfsCounter, 1034 mSDsluCounter, 2446 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 14:01:58,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 2968 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 14:01:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2024-10-13 14:01:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1028. [2024-10-13 14:01:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 726 states have (on average 1.8911845730027548) internal successors, (1373), 987 states have internal predecessors, (1373), 30 states have call successors, (30), 10 states have call predecessors, (30), 15 states have return successors, (41), 30 states have call predecessors, (41), 30 states have call successors, (41) [2024-10-13 14:01:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1444 transitions. [2024-10-13 14:01:58,940 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1444 transitions. Word has length 21 [2024-10-13 14:01:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:01:58,940 INFO L471 AbstractCegarLoop]: Abstraction has 1028 states and 1444 transitions. [2024-10-13 14:01:58,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 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) [2024-10-13 14:01:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1444 transitions. [2024-10-13 14:01:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-13 14:01:58,941 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:01:58,942 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:01:58,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 14:01:59,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:01:59,142 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_36_to_52_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:01:59,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:01:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1749113289, now seen corresponding path program 1 times [2024-10-13 14:01:59,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:01:59,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546497484] [2024-10-13 14:01:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:59,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:01:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:59,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 14:01:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:59,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-13 14:01:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 14:01:59,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:01:59,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546497484] [2024-10-13 14:01:59,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546497484] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 14:01:59,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755661191] [2024-10-13 14:01:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:01:59,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:01:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:01:59,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:01:59,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 14:01:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:01:59,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-13 14:01:59,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:01:59,848 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 11 treesize of output 7 [2024-10-13 14:01:59,928 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_28_to_32_0_#t~mem98_13| Int)) (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base|))) (and (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base| (store .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset| (* |v_func_to_recursive_line_28_to_32_0_#t~mem98_13| 4)))) (<= (select .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset|) |v_func_to_recursive_line_28_to_32_0_#t~mem98_13|)))) is different from true [2024-10-13 14:01:59,955 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 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-13 14:02:00,119 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 32 treesize of output 20 [2024-10-13 14:02:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-13 14:02:00,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 14:02:00,391 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 7 treesize of output 3 [2024-10-13 14:02:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:02:00,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755661191] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 14:02:00,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 14:02:00,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 28 [2024-10-13 14:02:00,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991203035] [2024-10-13 14:02:00,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 14:02:00,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-13 14:02:00,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-13 14:02:00,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=722, Unknown=1, NotChecked=54, Total=870 [2024-10-13 14:02:00,581 INFO L87 Difference]: Start difference. First operand 1028 states and 1444 transitions. Second operand has 30 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-13 14:02:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:03,554 INFO L93 Difference]: Finished difference Result 2482 states and 2711 transitions. [2024-10-13 14:02:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-13 14:02:03,555 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 21 [2024-10-13 14:02:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:03,566 INFO L225 Difference]: With dead ends: 2482 [2024-10-13 14:02:03,566 INFO L226 Difference]: Without dead ends: 2481 [2024-10-13 14:02:03,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=337, Invalid=2018, Unknown=1, NotChecked=94, Total=2450 [2024-10-13 14:02:03,569 INFO L432 NwaCegarLoop]: 1227 mSDtfsCounter, 5357 mSDsluCounter, 15704 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5370 SdHoareTripleChecker+Valid, 16931 SdHoareTripleChecker+Invalid, 4558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2293 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:03,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5370 Valid, 16931 Invalid, 4558 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [180 Valid, 2085 Invalid, 0 Unknown, 2293 Unchecked, 2.1s Time] [2024-10-13 14:02:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2024-10-13 14:02:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1030. [2024-10-13 14:02:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 727 states have (on average 1.888583218707015) internal successors, (1373), 988 states have internal predecessors, (1373), 30 states have call successors, (30), 10 states have call predecessors, (30), 16 states have return successors, (43), 31 states have call predecessors, (43), 30 states have call successors, (43) [2024-10-13 14:02:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1446 transitions. [2024-10-13 14:02:03,615 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1446 transitions. Word has length 21 [2024-10-13 14:02:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:03,616 INFO L471 AbstractCegarLoop]: Abstraction has 1030 states and 1446 transitions. [2024-10-13 14:02:03,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-13 14:02:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1446 transitions. [2024-10-13 14:02:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 14:02:03,617 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:03,617 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:02:03,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 14:02:03,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:03,818 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_36_to_52_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:03,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1612062930, now seen corresponding path program 1 times [2024-10-13 14:02:03,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:03,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216892022] [2024-10-13 14:02:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:03,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:04,084 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 14:02:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:04,331 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-13 14:02:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 14:02:04,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:04,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216892022] [2024-10-13 14:02:04,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216892022] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 14:02:04,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727151196] [2024-10-13 14:02:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:04,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:04,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:04,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:04,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 14:02:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:04,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-13 14:02:04,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:04,523 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 [2024-10-13 14:02:04,526 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 11 treesize of output 7 [2024-10-13 14:02:04,687 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#p~0#1.offset_BEFORE_CALL_3| Int)) (<= (select (select |c_#memory_int#5| |v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_main_~#p~0#1.offset_BEFORE_CALL_3|) 0)) (exists ((|v_func_to_recursive_line_28_to_32_0_#t~mem98_21| Int)) (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base|))) (and (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base| (store .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset| (* |v_func_to_recursive_line_28_to_32_0_#t~mem98_21| 4)))) (<= |v_func_to_recursive_line_28_to_32_0_#t~mem98_21| (select .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset|)))))) is different from true [2024-10-13 14:02:04,734 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 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-13 14:02:04,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 14:02:04,901 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 22 treesize of output 22 [2024-10-13 14:02:04,960 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 32 treesize of output 20 [2024-10-13 14:02:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-13 14:02:04,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 14:02:05,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727151196] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 14:02:05,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 14:02:05,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2024-10-13 14:02:05,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928274858] [2024-10-13 14:02:05,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 14:02:05,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 14:02:05,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 14:02:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=772, Unknown=1, NotChecked=56, Total=930 [2024-10-13 14:02:05,235 INFO L87 Difference]: Start difference. First operand 1030 states and 1446 transitions. Second operand has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 14:02:07,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:07,505 INFO L93 Difference]: Finished difference Result 1879 states and 2139 transitions. [2024-10-13 14:02:07,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 14:02:07,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2024-10-13 14:02:07,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:07,514 INFO L225 Difference]: With dead ends: 1879 [2024-10-13 14:02:07,514 INFO L226 Difference]: Without dead ends: 1878 [2024-10-13 14:02:07,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=1405, Unknown=1, NotChecked=78, Total=1722 [2024-10-13 14:02:07,537 INFO L432 NwaCegarLoop]: 983 mSDtfsCounter, 3214 mSDsluCounter, 8296 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3224 SdHoareTripleChecker+Valid, 9279 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1633 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:07,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3224 Valid, 9279 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1559 Invalid, 0 Unknown, 1633 Unchecked, 1.8s Time] [2024-10-13 14:02:07,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2024-10-13 14:02:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1286. [2024-10-13 14:02:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 970 states have (on average 1.8948453608247422) internal successors, (1838), 1232 states have internal predecessors, (1838), 40 states have call successors, (40), 12 states have call predecessors, (40), 19 states have return successors, (56), 41 states have call predecessors, (56), 40 states have call successors, (56) [2024-10-13 14:02:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1934 transitions. [2024-10-13 14:02:07,593 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1934 transitions. Word has length 22 [2024-10-13 14:02:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:07,593 INFO L471 AbstractCegarLoop]: Abstraction has 1286 states and 1934 transitions. [2024-10-13 14:02:07,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-13 14:02:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1934 transitions. [2024-10-13 14:02:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-13 14:02:07,596 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:07,596 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:02:07,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 14:02:07,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:07,797 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_36_to_52_0Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:07,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:07,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1016056783, now seen corresponding path program 1 times [2024-10-13 14:02:07,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:07,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269945168] [2024-10-13 14:02:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:07,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 14:02:07,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18452520] [2024-10-13 14:02:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:07,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:07,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:07,822 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:07,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 14:02:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:07,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-13 14:02:07,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:07,938 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 [2024-10-13 14:02:07,943 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 11 treesize of output 7 [2024-10-13 14:02:07,950 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 [2024-10-13 14:02:08,069 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 [2024-10-13 14:02:08,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 14:02:08,309 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 33 treesize of output 29 [2024-10-13 14:02:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:02:08,331 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 14:02:08,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:08,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269945168] [2024-10-13 14:02:08,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 14:02:08,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18452520] [2024-10-13 14:02:08,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18452520] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:02:08,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:02:08,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-13 14:02:08,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453966857] [2024-10-13 14:02:08,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:02:08,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 14:02:08,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:08,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 14:02:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-13 14:02:08,333 INFO L87 Difference]: Start difference. First operand 1286 states and 1934 transitions. Second operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 14:02:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:09,634 INFO L93 Difference]: Finished difference Result 1613 states and 2090 transitions. [2024-10-13 14:02:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 14:02:09,635 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-10-13 14:02:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:09,646 INFO L225 Difference]: With dead ends: 1613 [2024-10-13 14:02:09,647 INFO L226 Difference]: Without dead ends: 1612 [2024-10-13 14:02:09,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2024-10-13 14:02:09,651 INFO L432 NwaCegarLoop]: 475 mSDtfsCounter, 2069 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2071 SdHoareTripleChecker+Valid, 3975 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:09,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2071 Valid, 3975 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-13 14:02:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2024-10-13 14:02:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1338. [2024-10-13 14:02:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1018 states have (on average 1.8909626719056976) internal successors, (1925), 1280 states have internal predecessors, (1925), 42 states have call successors, (42), 14 states have call predecessors, (42), 21 states have return successors, (58), 43 states have call predecessors, (58), 42 states have call successors, (58) [2024-10-13 14:02:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2025 transitions. [2024-10-13 14:02:09,716 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2025 transitions. Word has length 23 [2024-10-13 14:02:09,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:09,717 INFO L471 AbstractCegarLoop]: Abstraction has 1338 states and 2025 transitions. [2024-10-13 14:02:09,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 14:02:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2025 transitions. [2024-10-13 14:02:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 14:02:09,721 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:09,721 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:02:09,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 14:02:09,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:09,922 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_36_to_52_0Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:09,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1432989252, now seen corresponding path program 1 times [2024-10-13 14:02:09,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:09,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85154706] [2024-10-13 14:02:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:09,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 14:02:09,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146958794] [2024-10-13 14:02:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:09,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:09,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:09,944 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:09,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 14:02:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:10,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-13 14:02:10,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:10,057 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 11 treesize of output 7 [2024-10-13 14:02:10,062 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 [2024-10-13 14:02:10,065 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 [2024-10-13 14:02:10,137 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 [2024-10-13 14:02:10,289 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 [2024-10-13 14:02:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:02:10,307 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 14:02:10,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:10,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85154706] [2024-10-13 14:02:10,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 14:02:10,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146958794] [2024-10-13 14:02:10,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146958794] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:02:10,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:02:10,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-13 14:02:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316564485] [2024-10-13 14:02:10,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:02:10,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 14:02:10,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:10,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 14:02:10,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-13 14:02:10,309 INFO L87 Difference]: Start difference. First operand 1338 states and 2025 transitions. Second operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 14:02:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:11,464 INFO L93 Difference]: Finished difference Result 1612 states and 2089 transitions. [2024-10-13 14:02:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 14:02:11,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-10-13 14:02:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:11,475 INFO L225 Difference]: With dead ends: 1612 [2024-10-13 14:02:11,476 INFO L226 Difference]: Without dead ends: 1611 [2024-10-13 14:02:11,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2024-10-13 14:02:11,478 INFO L432 NwaCegarLoop]: 480 mSDtfsCounter, 2071 mSDsluCounter, 3992 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 4472 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:11,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2073 Valid, 4472 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-13 14:02:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2024-10-13 14:02:11,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1338. [2024-10-13 14:02:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1018 states have (on average 1.8899803536345776) internal successors, (1924), 1280 states have internal predecessors, (1924), 42 states have call successors, (42), 14 states have call predecessors, (42), 21 states have return successors, (58), 43 states have call predecessors, (58), 42 states have call successors, (58) [2024-10-13 14:02:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2024 transitions. [2024-10-13 14:02:11,535 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2024 transitions. Word has length 24 [2024-10-13 14:02:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:11,535 INFO L471 AbstractCegarLoop]: Abstraction has 1338 states and 2024 transitions. [2024-10-13 14:02:11,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 14:02:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2024 transitions. [2024-10-13 14:02:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 14:02:11,537 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:11,537 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:02:11,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 14:02:11,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:11,738 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_36_to_52_0Err8ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:11,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:11,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1472993905, now seen corresponding path program 1 times [2024-10-13 14:02:11,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:11,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641850418] [2024-10-13 14:02:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:11,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 14:02:11,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399926019] [2024-10-13 14:02:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:11,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:11,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:11,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:11,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 14:02:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:11,860 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 14:02:11,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:11,863 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 11 treesize of output 7 [2024-10-13 14:02:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:02:11,936 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 14:02:11,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:11,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641850418] [2024-10-13 14:02:11,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 14:02:11,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399926019] [2024-10-13 14:02:11,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399926019] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:02:11,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:02:11,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 14:02:11,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145655550] [2024-10-13 14:02:11,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:02:11,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 14:02:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 14:02:11,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-13 14:02:11,938 INFO L87 Difference]: Start difference. First operand 1338 states and 2024 transitions. Second operand has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 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) [2024-10-13 14:02:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:12,327 INFO L93 Difference]: Finished difference Result 1622 states and 2096 transitions. [2024-10-13 14:02:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 14:02:12,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 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 25 [2024-10-13 14:02:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:12,333 INFO L225 Difference]: With dead ends: 1622 [2024-10-13 14:02:12,333 INFO L226 Difference]: Without dead ends: 1621 [2024-10-13 14:02:12,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-10-13 14:02:12,334 INFO L432 NwaCegarLoop]: 521 mSDtfsCounter, 892 mSDsluCounter, 2592 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 3113 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:12,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 3113 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 14:02:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2024-10-13 14:02:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1338. [2024-10-13 14:02:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1018 states have (on average 1.887033398821218) internal successors, (1921), 1280 states have internal predecessors, (1921), 42 states have call successors, (42), 14 states have call predecessors, (42), 21 states have return successors, (58), 43 states have call predecessors, (58), 42 states have call successors, (58) [2024-10-13 14:02:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2021 transitions. [2024-10-13 14:02:12,408 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2021 transitions. Word has length 25 [2024-10-13 14:02:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:12,409 INFO L471 AbstractCegarLoop]: Abstraction has 1338 states and 2021 transitions. [2024-10-13 14:02:12,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 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) [2024-10-13 14:02:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2021 transitions. [2024-10-13 14:02:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 14:02:12,410 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:12,410 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:02:12,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-13 14:02:12,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 14:02:12,611 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_36_to_52_0Err9ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:12,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:12,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1581829146, now seen corresponding path program 1 times [2024-10-13 14:02:12,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:12,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766680656] [2024-10-13 14:02:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:12,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 14:02:12,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23755620] [2024-10-13 14:02:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:12,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:12,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:12,627 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:12,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 14:02:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:12,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-13 14:02:12,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:12,724 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 11 treesize of output 7 [2024-10-13 14:02:12,727 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 11 treesize of output 7 [2024-10-13 14:02:12,972 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 [2024-10-13 14:02:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:02:13,009 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 14:02:13,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:13,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766680656] [2024-10-13 14:02:13,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 14:02:13,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23755620] [2024-10-13 14:02:13,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23755620] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:02:13,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:02:13,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-13 14:02:13,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095970390] [2024-10-13 14:02:13,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:02:13,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 14:02:13,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:13,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 14:02:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-10-13 14:02:13,011 INFO L87 Difference]: Start difference. First operand 1338 states and 2021 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 14:02:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:14,200 INFO L93 Difference]: Finished difference Result 1610 states and 2085 transitions. [2024-10-13 14:02:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 14:02:14,200 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-10-13 14:02:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:14,205 INFO L225 Difference]: With dead ends: 1610 [2024-10-13 14:02:14,205 INFO L226 Difference]: Without dead ends: 1609 [2024-10-13 14:02:14,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2024-10-13 14:02:14,206 INFO L432 NwaCegarLoop]: 481 mSDtfsCounter, 1367 mSDsluCounter, 4650 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 5131 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:14,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1369 Valid, 5131 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-13 14:02:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2024-10-13 14:02:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1338. [2024-10-13 14:02:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1018 states have (on average 1.8860510805500983) internal successors, (1920), 1280 states have internal predecessors, (1920), 42 states have call successors, (42), 14 states have call predecessors, (42), 21 states have return successors, (58), 43 states have call predecessors, (58), 42 states have call successors, (58) [2024-10-13 14:02:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2020 transitions. [2024-10-13 14:02:14,247 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2020 transitions. Word has length 26 [2024-10-13 14:02:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:14,247 INFO L471 AbstractCegarLoop]: Abstraction has 1338 states and 2020 transitions. [2024-10-13 14:02:14,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 14:02:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2020 transitions. [2024-10-13 14:02:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-13 14:02:14,248 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:14,248 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:02:14,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 14:02:14,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 14:02:14,449 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting func_to_recursive_line_36_to_52_0Err10ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:14,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:14,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1792063213, now seen corresponding path program 1 times [2024-10-13 14:02:14,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:14,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240544462] [2024-10-13 14:02:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:14,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 14:02:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321831839] [2024-10-13 14:02:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:14,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:14,480 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:14,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 14:02:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:14,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-13 14:02:14,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:14,587 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 11 treesize of output 7 [2024-10-13 14:02:14,591 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 [2024-10-13 14:02:14,714 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 [2024-10-13 14:02:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:02:14,725 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 14:02:14,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:14,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240544462] [2024-10-13 14:02:14,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 14:02:14,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321831839] [2024-10-13 14:02:14,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321831839] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:02:14,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:02:14,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 14:02:14,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189589688] [2024-10-13 14:02:14,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:02:14,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 14:02:14,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:14,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 14:02:14,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-13 14:02:14,727 INFO L87 Difference]: Start difference. First operand 1338 states and 2020 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 14:02:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:15,181 INFO L93 Difference]: Finished difference Result 1609 states and 2084 transitions. [2024-10-13 14:02:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 14:02:15,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-10-13 14:02:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:15,188 INFO L225 Difference]: With dead ends: 1609 [2024-10-13 14:02:15,188 INFO L226 Difference]: Without dead ends: 1608 [2024-10-13 14:02:15,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-10-13 14:02:15,191 INFO L432 NwaCegarLoop]: 501 mSDtfsCounter, 1310 mSDsluCounter, 2511 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:15,192 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 3012 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 14:02:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2024-10-13 14:02:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1338. [2024-10-13 14:02:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1018 states have (on average 1.8850687622789783) internal successors, (1919), 1280 states have internal predecessors, (1919), 42 states have call successors, (42), 14 states have call predecessors, (42), 21 states have return successors, (58), 43 states have call predecessors, (58), 42 states have call successors, (58) [2024-10-13 14:02:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2019 transitions. [2024-10-13 14:02:15,244 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2019 transitions. Word has length 27 [2024-10-13 14:02:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:15,245 INFO L471 AbstractCegarLoop]: Abstraction has 1338 states and 2019 transitions. [2024-10-13 14:02:15,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 14:02:15,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2019 transitions. [2024-10-13 14:02:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-13 14:02:15,246 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:15,246 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:02:15,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 14:02:15,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 14:02:15,447 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting func_to_recursive_line_36_to_52_0Err11ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:15,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:15,447 INFO L85 PathProgramCache]: Analyzing trace with hash 280615304, now seen corresponding path program 1 times [2024-10-13 14:02:15,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:15,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540324096] [2024-10-13 14:02:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:15,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 14:02:15,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221781130] [2024-10-13 14:02:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:15,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:15,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:15,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:15,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 14:02:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:15,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-13 14:02:15,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:15,597 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 [2024-10-13 14:02:15,599 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 11 treesize of output 7 [2024-10-13 14:02:15,789 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 [2024-10-13 14:02:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:02:15,806 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 14:02:15,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:15,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540324096] [2024-10-13 14:02:15,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 14:02:15,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221781130] [2024-10-13 14:02:15,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221781130] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 14:02:15,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 14:02:15,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-13 14:02:15,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723287168] [2024-10-13 14:02:15,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 14:02:15,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 14:02:15,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 14:02:15,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-10-13 14:02:15,808 INFO L87 Difference]: Start difference. First operand 1338 states and 2019 transitions. Second operand has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 14:02:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:16,521 INFO L93 Difference]: Finished difference Result 1608 states and 2083 transitions. [2024-10-13 14:02:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 14:02:16,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-10-13 14:02:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:16,526 INFO L225 Difference]: With dead ends: 1608 [2024-10-13 14:02:16,526 INFO L226 Difference]: Without dead ends: 1607 [2024-10-13 14:02:16,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-10-13 14:02:16,527 INFO L432 NwaCegarLoop]: 500 mSDtfsCounter, 1953 mSDsluCounter, 3856 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 4356 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:16,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1961 Valid, 4356 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-13 14:02:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2024-10-13 14:02:16,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1338. [2024-10-13 14:02:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1018 states have (on average 1.8840864440078586) internal successors, (1918), 1280 states have internal predecessors, (1918), 42 states have call successors, (42), 14 states have call predecessors, (42), 21 states have return successors, (58), 43 states have call predecessors, (58), 42 states have call successors, (58) [2024-10-13 14:02:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 2018 transitions. [2024-10-13 14:02:16,578 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 2018 transitions. Word has length 28 [2024-10-13 14:02:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:16,578 INFO L471 AbstractCegarLoop]: Abstraction has 1338 states and 2018 transitions. [2024-10-13 14:02:16,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-13 14:02:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 2018 transitions. [2024-10-13 14:02:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-13 14:02:16,579 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:16,579 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:02:16,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 14:02:16,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 14:02:16,784 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting func_to_recursive_line_36_to_52_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:16,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1161185275, now seen corresponding path program 2 times [2024-10-13 14:02:16,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:16,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092448059] [2024-10-13 14:02:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:16,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:17,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-13 14:02:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:17,396 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-13 14:02:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:17,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-13 14:02:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 14:02:17,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:17,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092448059] [2024-10-13 14:02:17,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092448059] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 14:02:17,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530548468] [2024-10-13 14:02:17,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 14:02:17,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:17,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:17,635 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:17,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 14:02:17,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 14:02:17,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 14:02:17,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-13 14:02:17,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:17,785 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 11 treesize of output 7 [2024-10-13 14:02:17,798 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 [2024-10-13 14:02:18,184 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_14| Int)) (<= (select (select |c_#memory_int#5| |v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_14|) 0) 0)) (exists ((|v_func_to_recursive_line_28_to_32_0_#t~mem98_29| Int)) (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base|))) (and (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base| (store .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset| (* |v_func_to_recursive_line_28_to_32_0_#t~mem98_29| 4)))) (<= |v_func_to_recursive_line_28_to_32_0_#t~mem98_29| (select .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset|)))))) is different from true [2024-10-13 14:02:18,202 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((func_to_recursive_line_28_to_32_0_~q.offset Int) (|v_func_to_recursive_line_28_to_32_0_#t~mem98_29| Int)) (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base|))) (and (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base| (store .cse0 func_to_recursive_line_28_to_32_0_~q.offset (* |v_func_to_recursive_line_28_to_32_0_#t~mem98_29| 4)))) (<= |v_func_to_recursive_line_28_to_32_0_#t~mem98_29| (* (select .cse0 func_to_recursive_line_28_to_32_0_~q.offset) 4))))) (exists ((|v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_14| Int)) (<= (select (select |c_#memory_int#5| |v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_14|) 0) 0))) is different from true [2024-10-13 14:02:18,242 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-10-13 14:02:18,242 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 30 treesize of output 37 [2024-10-13 14:02:18,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 14:02:18,581 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 22 treesize of output 18 [2024-10-13 14:02:18,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 14:02:18,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 59 [2024-10-13 14:02:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2024-10-13 14:02:18,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 14:02:23,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530548468] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 14:02:23,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 14:02:23,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 32 [2024-10-13 14:02:23,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484478151] [2024-10-13 14:02:23,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 14:02:23,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-13 14:02:23,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-13 14:02:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1261, Unknown=3, NotChecked=146, Total=1560 [2024-10-13 14:02:23,114 INFO L87 Difference]: Start difference. First operand 1338 states and 2018 transitions. Second operand has 34 states, 25 states have (on average 1.76) internal successors, (44), 29 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 14:02:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:27,449 INFO L93 Difference]: Finished difference Result 2118 states and 2607 transitions. [2024-10-13 14:02:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 14:02:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 25 states have (on average 1.76) internal successors, (44), 29 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 30 [2024-10-13 14:02:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:27,454 INFO L225 Difference]: With dead ends: 2118 [2024-10-13 14:02:27,454 INFO L226 Difference]: Without dead ends: 2117 [2024-10-13 14:02:27,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=358, Invalid=2617, Unknown=3, NotChecked=214, Total=3192 [2024-10-13 14:02:27,455 INFO L432 NwaCegarLoop]: 944 mSDtfsCounter, 3117 mSDsluCounter, 16636 mSDsCounter, 0 mSdLazyCounter, 3037 mSolverCounterSat, 92 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3123 SdHoareTripleChecker+Valid, 17580 SdHoareTripleChecker+Invalid, 6359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 3037 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 3228 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:27,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3123 Valid, 17580 Invalid, 6359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 3037 Invalid, 2 Unknown, 3228 Unchecked, 3.2s Time] [2024-10-13 14:02:27,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2024-10-13 14:02:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1582. [2024-10-13 14:02:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1250 states have (on average 1.888) internal successors, (2360), 1512 states have internal predecessors, (2360), 51 states have call successors, (51), 16 states have call predecessors, (51), 24 states have return successors, (73), 53 states have call predecessors, (73), 51 states have call successors, (73) [2024-10-13 14:02:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 2484 transitions. [2024-10-13 14:02:27,515 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 2484 transitions. Word has length 30 [2024-10-13 14:02:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:27,515 INFO L471 AbstractCegarLoop]: Abstraction has 1582 states and 2484 transitions. [2024-10-13 14:02:27,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 25 states have (on average 1.76) internal successors, (44), 29 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-13 14:02:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 2484 transitions. [2024-10-13 14:02:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-13 14:02:27,516 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:27,516 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1] [2024-10-13 14:02:27,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 14:02:27,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 14:02:27,716 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting func_to_recursive_line_28_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:27,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1413900189, now seen corresponding path program 2 times [2024-10-13 14:02:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:27,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207554227] [2024-10-13 14:02:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:27,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:02:28,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:28,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207554227] [2024-10-13 14:02:28,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207554227] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 14:02:28,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496176217] [2024-10-13 14:02:28,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 14:02:28,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:28,368 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:28,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 14:02:28,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 14:02:28,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 14:02:28,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-10-13 14:02:28,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:28,476 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 11 treesize of output 7 [2024-10-13 14:02:28,509 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 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-13 14:02:28,593 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 0 case distinctions, treesize of input 39 treesize of output 23 [2024-10-13 14:02:28,707 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 0 case distinctions, treesize of input 45 treesize of output 29 [2024-10-13 14:02:28,842 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 0 case distinctions, treesize of input 45 treesize of output 29 [2024-10-13 14:02:28,912 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 [2024-10-13 14:02:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:02:28,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 14:02:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 14:02:29,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496176217] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 14:02:29,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 14:02:29,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 49 [2024-10-13 14:02:29,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856326520] [2024-10-13 14:02:29,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 14:02:29,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-13 14:02:29,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-13 14:02:29,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2113, Unknown=0, NotChecked=0, Total=2550 [2024-10-13 14:02:29,190 INFO L87 Difference]: Start difference. First operand 1582 states and 2484 transitions. Second operand has 51 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 36 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 14:02:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:30,309 INFO L93 Difference]: Finished difference Result 1643 states and 2568 transitions. [2024-10-13 14:02:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-13 14:02:30,309 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 36 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-13 14:02:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:30,316 INFO L225 Difference]: With dead ends: 1643 [2024-10-13 14:02:30,316 INFO L226 Difference]: Without dead ends: 1642 [2024-10-13 14:02:30,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1131, Invalid=4721, Unknown=0, NotChecked=0, Total=5852 [2024-10-13 14:02:30,318 INFO L432 NwaCegarLoop]: 557 mSDtfsCounter, 229 mSDsluCounter, 7478 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 8035 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:30,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 8035 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 14:02:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2024-10-13 14:02:30,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2024-10-13 14:02:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1292 states have (on average 1.8637770897832817) internal successors, (2408), 1560 states have internal predecessors, (2408), 57 states have call successors, (57), 22 states have call predecessors, (57), 36 states have return successors, (97), 59 states have call predecessors, (97), 57 states have call successors, (97) [2024-10-13 14:02:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2562 transitions. [2024-10-13 14:02:30,384 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2562 transitions. Word has length 31 [2024-10-13 14:02:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:30,384 INFO L471 AbstractCegarLoop]: Abstraction has 1642 states and 2562 transitions. [2024-10-13 14:02:30,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 36 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 14:02:30,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2562 transitions. [2024-10-13 14:02:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-13 14:02:30,386 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:30,386 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:02:30,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 14:02:30,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 14:02:30,587 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting func_to_recursive_line_36_to_52_0Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:30,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash -526936954, now seen corresponding path program 1 times [2024-10-13 14:02:30,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:30,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62453443] [2024-10-13 14:02:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:30,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 14:02:30,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861844771] [2024-10-13 14:02:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:30,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:30,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:30,604 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:30,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 14:02:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:30,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-13 14:02:30,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:30,732 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 11 treesize of output 7 [2024-10-13 14:02:30,737 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 [2024-10-13 14:02:30,739 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 11 [2024-10-13 14:02:30,927 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 11 treesize of output 7 [2024-10-13 14:02:30,967 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 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-13 14:02:30,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 14:02:30,990 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 30 treesize of output 30 [2024-10-13 14:02:31,188 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 [2024-10-13 14:02:31,194 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 [2024-10-13 14:02:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 14:02:31,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 14:02:31,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:31,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62453443] [2024-10-13 14:02:31,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 14:02:31,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861844771] [2024-10-13 14:02:31,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861844771] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 14:02:31,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-13 14:02:31,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-13 14:02:31,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249450429] [2024-10-13 14:02:31,331 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-13 14:02:31,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 14:02:31,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 14:02:31,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-10-13 14:02:31,332 INFO L87 Difference]: Start difference. First operand 1642 states and 2562 transitions. Second operand has 13 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 14:02:35,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 14:02:39,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 14:02:43,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 14:02:48,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 14:02:52,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-13 14:02:56,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-13 14:02:57,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 14:02:57,086 INFO L93 Difference]: Finished difference Result 2082 states and 2626 transitions. [2024-10-13 14:02:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 14:02:57,086 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2024-10-13 14:02:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 14:02:57,091 INFO L225 Difference]: With dead ends: 2082 [2024-10-13 14:02:57,091 INFO L226 Difference]: Without dead ends: 2081 [2024-10-13 14:02:57,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-10-13 14:02:57,093 INFO L432 NwaCegarLoop]: 957 mSDtfsCounter, 1354 mSDsluCounter, 5852 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 29 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 6809 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2024-10-13 14:02:57,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 6809 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1191 Invalid, 6 Unknown, 0 Unchecked, 25.5s Time] [2024-10-13 14:02:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2024-10-13 14:02:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1642. [2024-10-13 14:02:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1292 states have (on average 1.8630030959752322) internal successors, (2407), 1560 states have internal predecessors, (2407), 57 states have call successors, (57), 22 states have call predecessors, (57), 36 states have return successors, (97), 59 states have call predecessors, (97), 57 states have call successors, (97) [2024-10-13 14:02:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2561 transitions. [2024-10-13 14:02:57,168 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2561 transitions. Word has length 31 [2024-10-13 14:02:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 14:02:57,168 INFO L471 AbstractCegarLoop]: Abstraction has 1642 states and 2561 transitions. [2024-10-13 14:02:57,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 14:02:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2561 transitions. [2024-10-13 14:02:57,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-13 14:02:57,169 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 14:02:57,169 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 14:02:57,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 14:02:57,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:57,370 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting func_to_recursive_line_36_to_52_0Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-13 14:02:57,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 14:02:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash 844823661, now seen corresponding path program 1 times [2024-10-13 14:02:57,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 14:02:57,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194522359] [2024-10-13 14:02:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:57,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 14:02:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-13 14:02:57,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999616528] [2024-10-13 14:02:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 14:02:57,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 14:02:57,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 14:02:57,391 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 14:02:57,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 14:02:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 14:02:57,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-10-13 14:02:57,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 14:02:57,533 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 [2024-10-13 14:02:57,535 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 11 treesize of output 7 [2024-10-13 14:02:57,542 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 11 [2024-10-13 14:02:57,740 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 11 treesize of output 7 [2024-10-13 14:02:57,853 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 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-13 14:02:57,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 14:02:57,863 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 37 treesize of output 33 [2024-10-13 14:02:58,064 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 [2024-10-13 14:02:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 14:02:58,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 14:02:58,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 14:02:58,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194522359] [2024-10-13 14:02:58,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-13 14:02:58,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999616528] [2024-10-13 14:02:58,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999616528] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 14:02:58,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-13 14:02:58,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-10-13 14:02:58,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671368827] [2024-10-13 14:02:58,402 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-13 14:02:58,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 14:02:58,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 14:02:58,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 14:02:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-10-13 14:02:58,404 INFO L87 Difference]: Start difference. First operand 1642 states and 2561 transitions. Second operand has 16 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-13 14:03:04,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-13 14:03:08,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]