./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 4a390ef5 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-dev-4a390ef-m [2024-10-24 20:43:23,975 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 20:43:24,062 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-10-24 20:43:24,067 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 20:43:24,067 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 20:43:24,095 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 20:43:24,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 20:43:24,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 20:43:24,096 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 20:43:24,097 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 20:43:24,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 20:43:24,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 20:43:24,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 20:43:24,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 20:43:24,098 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 20:43:24,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 20:43:24,099 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 20:43:24,100 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 20:43:24,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 20:43:24,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 20:43:24,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 20:43:24,107 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 20:43:24,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 20:43:24,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 20:43:24,107 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 20:43:24,108 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-10-24 20:43:24,108 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 20:43:24,108 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 20:43:24,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 20:43:24,109 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 20:43:24,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 20:43:24,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 20:43:24,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 20:43:24,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 20:43:24,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 20:43:24,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 20:43:24,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 20:43:24,113 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 20:43:24,113 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 20:43:24,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 20:43:24,114 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 20:43:24,114 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 20:43:24,114 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 20:43:24,115 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 20:43:24,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a9aad6636e75eb788a44e63e1649ee5df89ecae877c31a886978a8e3fdd2e8f [2024-10-24 20:43:24,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 20:43:24,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 20:43:24,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 20:43:24,394 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 20:43:24,397 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 20:43:24,399 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c [2024-10-24 20:43:25,871 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 20:43:26,090 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 20:43:26,091 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c [2024-10-24 20:43:26,102 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdcc0b053/054d73ea1930456c90f99afe5e1482ac/FLAG1ed37b6dd [2024-10-24 20:43:26,457 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdcc0b053/054d73ea1930456c90f99afe5e1482ac [2024-10-24 20:43:26,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 20:43:26,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 20:43:26,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 20:43:26,464 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 20:43:26,470 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 20:43:26,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56cc1015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26, skipping insertion in model container [2024-10-24 20:43:26,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,500 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 20:43:26,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 20:43:26,742 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 20:43:26,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 20:43:26,813 INFO L204 MainTranslator]: Completed translation [2024-10-24 20:43:26,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26 WrapperNode [2024-10-24 20:43:26,814 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 20:43:26,815 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 20:43:26,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 20:43:26,815 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 20:43:26,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,866 INFO L138 Inliner]: procedures = 17, calls = 172, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 185 [2024-10-24 20:43:26,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 20:43:26,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 20:43:26,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 20:43:26,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 20:43:26,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,882 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,904 INFO L175 MemorySlicer]: Split 138 memory accesses to 6 slices as follows [2, 20, 35, 30, 22, 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, 1, 3, 2, 2, 3]. [2024-10-24 20:43:26,905 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,905 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,916 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,919 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,923 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,926 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 20:43:26,939 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 20:43:26,942 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 20:43:26,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 20:43:26,943 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (1/1) ... [2024-10-24 20:43:26,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 20:43:26,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:26,978 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) [2024-10-24 20:43:26,985 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 [2024-10-24 20:43:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 20:43:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_28_to_32_0 [2024-10-24 20:43:27,027 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_28_to_32_0 [2024-10-24 20:43:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 20:43:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 20:43:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 20:43:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 20:43:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-24 20:43:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-24 20:43:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 20:43:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 20:43:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 20:43:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 20:43:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 20:43:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-24 20:43:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-24 20:43:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 20:43:27,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 20:43:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 20:43:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 20:43:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 20:43:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 20:43:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-24 20:43:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-24 20:43:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 20:43:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 20:43:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_36_to_52_0 [2024-10-24 20:43:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_36_to_52_0 [2024-10-24 20:43:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 20:43:27,148 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 20:43:27,150 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 20:43:29,843 INFO L? ?]: Removed 1170 outVars from TransFormulas that were not future-live. [2024-10-24 20:43:29,844 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 20:43:29,898 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 20:43:29,898 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 20:43:29,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 08:43:29 BoogieIcfgContainer [2024-10-24 20:43:29,899 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 20:43:29,901 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 20:43:29,901 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 20:43:29,904 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 20:43:29,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 08:43:26" (1/3) ... [2024-10-24 20:43:29,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca82045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 08:43:29, skipping insertion in model container [2024-10-24 20:43:29,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 08:43:26" (2/3) ... [2024-10-24 20:43:29,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca82045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 08:43:29, skipping insertion in model container [2024-10-24 20:43:29,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 08:43:29" (3/3) ... [2024-10-24 20:43:29,907 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra.c [2024-10-24 20:43:29,923 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 20:43:29,923 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 258 error locations. [2024-10-24 20:43:30,009 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 20:43:30,015 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;@4e3b58c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 20:43:30,015 INFO L334 AbstractCegarLoop]: Starting to check reachability of 258 error locations. [2024-10-24 20:43:30,020 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) [2024-10-24 20:43:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-24 20:43:30,027 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:30,027 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 20:43:30,028 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)] === [2024-10-24 20:43:30,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:30,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1883854585, now seen corresponding path program 1 times [2024-10-24 20:43:30,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:30,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464122964] [2024-10-24 20:43:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:30,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:30,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:30,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464122964] [2024-10-24 20:43:30,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464122964] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:30,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:30,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 20:43:30,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489727881] [2024-10-24 20:43:30,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:30,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 20:43:30,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 20:43:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 20:43:30,650 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) [2024-10-24 20:43:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:31,046 INFO L93 Difference]: Finished difference Result 1112 states and 1155 transitions. [2024-10-24 20:43:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 20:43:31,053 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 [2024-10-24 20:43:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:31,075 INFO L225 Difference]: With dead ends: 1112 [2024-10-24 20:43:31,075 INFO L226 Difference]: Without dead ends: 562 [2024-10-24 20:43:31,087 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 [2024-10-24 20:43:31,090 INFO L432 NwaCegarLoop]: 558 mSDtfsCounter, 13 mSDsluCounter, 2143 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-10-24 20:43:31,091 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] [2024-10-24 20:43:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2024-10-24 20:43:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 559. [2024-10-24 20:43:31,151 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) [2024-10-24 20:43:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 571 transitions. [2024-10-24 20:43:31,161 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 571 transitions. Word has length 6 [2024-10-24 20:43:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:31,162 INFO L471 AbstractCegarLoop]: Abstraction has 559 states and 571 transitions. [2024-10-24 20:43:31,162 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) [2024-10-24 20:43:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 571 transitions. [2024-10-24 20:43:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 20:43:31,163 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:31,163 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 20:43:31,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 20:43:31,163 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)] === [2024-10-24 20:43:31,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1730049565, now seen corresponding path program 1 times [2024-10-24 20:43:31,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:31,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150555851] [2024-10-24 20:43:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:31,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:31,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:31,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150555851] [2024-10-24 20:43:31,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150555851] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:31,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:31,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 20:43:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289160668] [2024-10-24 20:43:31,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:31,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 20:43:31,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:31,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 20:43:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 20:43:31,347 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) [2024-10-24 20:43:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:31,535 INFO L93 Difference]: Finished difference Result 562 states and 575 transitions. [2024-10-24 20:43:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 20:43:31,535 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 [2024-10-24 20:43:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:31,539 INFO L225 Difference]: With dead ends: 562 [2024-10-24 20:43:31,539 INFO L226 Difference]: Without dead ends: 561 [2024-10-24 20:43:31,539 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 [2024-10-24 20:43:31,541 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 [2024-10-24 20:43:31,541 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] [2024-10-24 20:43:31,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2024-10-24 20:43:31,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 560. [2024-10-24 20:43:31,568 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) [2024-10-24 20:43:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 572 transitions. [2024-10-24 20:43:31,577 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 572 transitions. Word has length 7 [2024-10-24 20:43:31,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:31,577 INFO L471 AbstractCegarLoop]: Abstraction has 560 states and 572 transitions. [2024-10-24 20:43:31,578 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) [2024-10-24 20:43:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 572 transitions. [2024-10-24 20:43:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 20:43:31,578 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:31,578 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 20:43:31,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 20:43:31,579 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)] === [2024-10-24 20:43:31,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:31,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1172955234, now seen corresponding path program 1 times [2024-10-24 20:43:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:31,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710075803] [2024-10-24 20:43:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:31,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:31,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 20:43:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:31,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710075803] [2024-10-24 20:43:31,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710075803] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:31,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:31,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 20:43:31,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176958150] [2024-10-24 20:43:31,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:31,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 20:43:31,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:31,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 20:43:31,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 20:43:31,770 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) [2024-10-24 20:43:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:32,298 INFO L93 Difference]: Finished difference Result 1086 states and 1107 transitions. [2024-10-24 20:43:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 20:43:32,299 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 [2024-10-24 20:43:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:32,303 INFO L225 Difference]: With dead ends: 1086 [2024-10-24 20:43:32,304 INFO L226 Difference]: Without dead ends: 1084 [2024-10-24 20:43:32,305 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 [2024-10-24 20:43:32,308 INFO L432 NwaCegarLoop]: 495 mSDtfsCounter, 1626 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-10-24 20:43:32,308 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] [2024-10-24 20:43:32,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2024-10-24 20:43:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 757. [2024-10-24 20:43:32,330 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) [2024-10-24 20:43:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 950 transitions. [2024-10-24 20:43:32,333 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 950 transitions. Word has length 11 [2024-10-24 20:43:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:32,334 INFO L471 AbstractCegarLoop]: Abstraction has 757 states and 950 transitions. [2024-10-24 20:43:32,334 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) [2024-10-24 20:43:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 950 transitions. [2024-10-24 20:43:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-24 20:43:32,335 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:32,335 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 20:43:32,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 20:43:32,335 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)] === [2024-10-24 20:43:32,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash 982485849, now seen corresponding path program 1 times [2024-10-24 20:43:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572707600] [2024-10-24 20:43:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:32,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:32,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572707600] [2024-10-24 20:43:32,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572707600] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 20:43:32,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451064769] [2024-10-24 20:43:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:32,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:32,655 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) [2024-10-24 20:43:32,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 20:43:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:32,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-24 20:43:32,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:43:32,812 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 [2024-10-24 20:43:32,913 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 36 treesize of output 13 [2024-10-24 20:43:32,934 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 [2024-10-24 20:43:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:32,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 20:43:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:33,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451064769] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 20:43:33,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 20:43:33,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-10-24 20:43:33,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969227487] [2024-10-24 20:43:33,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 20:43:33,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 20:43:33,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 20:43:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-10-24 20:43:33,072 INFO L87 Difference]: Start difference. First operand 757 states and 950 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 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) [2024-10-24 20:43:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:33,523 INFO L93 Difference]: Finished difference Result 761 states and 960 transitions. [2024-10-24 20:43:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 20:43:33,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 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 [2024-10-24 20:43:33,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:33,527 INFO L225 Difference]: With dead ends: 761 [2024-10-24 20:43:33,527 INFO L226 Difference]: Without dead ends: 760 [2024-10-24 20:43:33,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2024-10-24 20:43:33,529 INFO L432 NwaCegarLoop]: 556 mSDtfsCounter, 32 mSDsluCounter, 5801 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6357 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:33,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 6357 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 20:43:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-10-24 20:43:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 756. [2024-10-24 20:43:33,556 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) [2024-10-24 20:43:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 949 transitions. [2024-10-24 20:43:33,559 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 949 transitions. Word has length 12 [2024-10-24 20:43:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:33,559 INFO L471 AbstractCegarLoop]: Abstraction has 756 states and 949 transitions. [2024-10-24 20:43:33,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 16 states have internal predecessors, (28), 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) [2024-10-24 20:43:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 949 transitions. [2024-10-24 20:43:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-24 20:43:33,560 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:33,560 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 20:43:33,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 20:43:33,761 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 [2024-10-24 20:43:33,761 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)] === [2024-10-24 20:43:33,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1928547136, now seen corresponding path program 1 times [2024-10-24 20:43:33,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:33,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017762509] [2024-10-24 20:43:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:33,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:33,926 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 20:43:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:33,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:33,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017762509] [2024-10-24 20:43:33,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017762509] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:33,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:33,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 20:43:33,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628377680] [2024-10-24 20:43:33,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:33,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 20:43:33,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:33,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 20:43:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-24 20:43:33,940 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) [2024-10-24 20:43:34,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:34,396 INFO L93 Difference]: Finished difference Result 1273 states and 1475 transitions. [2024-10-24 20:43:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 20:43:34,398 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 [2024-10-24 20:43:34,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:34,406 INFO L225 Difference]: With dead ends: 1273 [2024-10-24 20:43:34,406 INFO L226 Difference]: Without dead ends: 1272 [2024-10-24 20:43:34,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-24 20:43:34,407 INFO L432 NwaCegarLoop]: 514 mSDtfsCounter, 1605 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1613 SdHoareTripleChecker+Valid, 3020 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:34,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1613 Valid, 3020 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 20:43:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2024-10-24 20:43:34,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 950. [2024-10-24 20:43:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 660 states have (on average 1.9227272727272726) internal successors, (1269), 918 states have internal predecessors, (1269), 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) [2024-10-24 20:43:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1324 transitions. [2024-10-24 20:43:34,444 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1324 transitions. Word has length 13 [2024-10-24 20:43:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:34,444 INFO L471 AbstractCegarLoop]: Abstraction has 950 states and 1324 transitions. [2024-10-24 20:43:34,444 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) [2024-10-24 20:43:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1324 transitions. [2024-10-24 20:43:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-24 20:43:34,445 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:34,446 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-24 20:43:34,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 20:43:34,446 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)] === [2024-10-24 20:43:34,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:34,447 INFO L85 PathProgramCache]: Analyzing trace with hash 392290691, now seen corresponding path program 1 times [2024-10-24 20:43:34,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:34,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309208212] [2024-10-24 20:43:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:34,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:34,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:34,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309208212] [2024-10-24 20:43:34,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309208212] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 20:43:34,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684993624] [2024-10-24 20:43:34,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:34,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:34,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:34,742 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) [2024-10-24 20:43:34,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 20:43:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:34,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-24 20:43:34,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:43:34,846 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 [2024-10-24 20:43:34,920 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 36 treesize of output 13 [2024-10-24 20:43:34,934 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 [2024-10-24 20:43:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:34,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 20:43:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:35,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684993624] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 20:43:35,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 20:43:35,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-10-24 20:43:35,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620221869] [2024-10-24 20:43:35,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 20:43:35,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 20:43:35,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:35,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 20:43:35,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-10-24 20:43:35,047 INFO L87 Difference]: Start difference. First operand 950 states and 1324 transitions. Second operand has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 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) [2024-10-24 20:43:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:35,500 INFO L93 Difference]: Finished difference Result 981 states and 1363 transitions. [2024-10-24 20:43:35,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-24 20:43:35,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 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 [2024-10-24 20:43:35,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:35,507 INFO L225 Difference]: With dead ends: 981 [2024-10-24 20:43:35,508 INFO L226 Difference]: Without dead ends: 980 [2024-10-24 20:43:35,509 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2024-10-24 20:43:35,510 INFO L432 NwaCegarLoop]: 554 mSDtfsCounter, 72 mSDsluCounter, 4801 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 5355 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:35,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 5355 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 20:43:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2024-10-24 20:43:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 980. [2024-10-24 20:43:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 681 states have (on average 1.8986784140969164) internal successors, (1293), 942 states have internal predecessors, (1293), 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) [2024-10-24 20:43:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1360 transitions. [2024-10-24 20:43:35,549 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1360 transitions. Word has length 13 [2024-10-24 20:43:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:35,550 INFO L471 AbstractCegarLoop]: Abstraction has 980 states and 1360 transitions. [2024-10-24 20:43:35,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 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) [2024-10-24 20:43:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1360 transitions. [2024-10-24 20:43:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-24 20:43:35,551 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:35,551 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 20:43:35,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 20:43:35,751 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 [2024-10-24 20:43:35,752 INFO L396 AbstractCegarLoop]: === Iteration 7 === 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)] === [2024-10-24 20:43:35,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:35,752 INFO L85 PathProgramCache]: Analyzing trace with hash 344580969, now seen corresponding path program 1 times [2024-10-24 20:43:35,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:35,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386494216] [2024-10-24 20:43:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:35,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:35,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 20:43:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:35,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:35,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386494216] [2024-10-24 20:43:35,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386494216] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:35,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:35,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 20:43:35,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267407479] [2024-10-24 20:43:35,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:35,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 20:43:35,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 20:43:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 20:43:35,987 INFO L87 Difference]: Start difference. First operand 980 states and 1360 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2024-10-24 20:43:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:36,559 INFO L93 Difference]: Finished difference Result 1298 states and 1507 transitions. [2024-10-24 20:43:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 20:43:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 14 [2024-10-24 20:43:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:36,565 INFO L225 Difference]: With dead ends: 1298 [2024-10-24 20:43:36,565 INFO L226 Difference]: Without dead ends: 1297 [2024-10-24 20:43:36,566 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 [2024-10-24 20:43:36,566 INFO L432 NwaCegarLoop]: 495 mSDtfsCounter, 1599 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 3059 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:36,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1607 Valid, 3059 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 20:43:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2024-10-24 20:43:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 980. [2024-10-24 20:43:36,625 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) [2024-10-24 20:43:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1359 transitions. [2024-10-24 20:43:36,629 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1359 transitions. Word has length 14 [2024-10-24 20:43:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:36,630 INFO L471 AbstractCegarLoop]: Abstraction has 980 states and 1359 transitions. [2024-10-24 20:43:36,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2024-10-24 20:43:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1359 transitions. [2024-10-24 20:43:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 20:43:36,632 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:36,632 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] [2024-10-24 20:43:36,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 20:43:36,632 INFO L396 AbstractCegarLoop]: === Iteration 8 === 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)] === [2024-10-24 20:43:36,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:36,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1605524781, now seen corresponding path program 1 times [2024-10-24 20:43:36,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:36,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248660288] [2024-10-24 20:43:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:36,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 20:43:36,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295282882] [2024-10-24 20:43:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:36,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:36,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:36,668 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) [2024-10-24 20:43:36,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 20:43:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:36,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 20:43:36,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:43:36,779 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 [2024-10-24 20:43:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:36,884 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 20:43:36,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248660288] [2024-10-24 20:43:36,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 20:43:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295282882] [2024-10-24 20:43:36,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295282882] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:36,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:36,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 20:43:36,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255692252] [2024-10-24 20:43:36,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:36,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 20:43:36,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 20:43:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-24 20:43:36,887 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) [2024-10-24 20:43:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:37,216 INFO L93 Difference]: Finished difference Result 1315 states and 1520 transitions. [2024-10-24 20:43:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 20:43:37,216 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 [2024-10-24 20:43:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:37,221 INFO L225 Difference]: With dead ends: 1315 [2024-10-24 20:43:37,221 INFO L226 Difference]: Without dead ends: 1313 [2024-10-24 20:43:37,222 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 [2024-10-24 20:43:37,223 INFO L432 NwaCegarLoop]: 522 mSDtfsCounter, 1403 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 2219 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:37,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1405 Valid, 2219 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 20:43:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2024-10-24 20:43:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1028. [2024-10-24 20:43:37,251 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) [2024-10-24 20:43:37,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1444 transitions. [2024-10-24 20:43:37,258 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1444 transitions. Word has length 21 [2024-10-24 20:43:37,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:37,258 INFO L471 AbstractCegarLoop]: Abstraction has 1028 states and 1444 transitions. [2024-10-24 20:43:37,259 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) [2024-10-24 20:43:37,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1444 transitions. [2024-10-24 20:43:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 20:43:37,261 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:37,261 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 20:43:37,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 20:43:37,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:37,464 INFO L396 AbstractCegarLoop]: === Iteration 9 === 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)] === [2024-10-24 20:43:37,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:37,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1749113289, now seen corresponding path program 1 times [2024-10-24 20:43:37,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:37,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001673550] [2024-10-24 20:43:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:37,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:37,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 20:43:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:37,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 20:43:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 20:43:38,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001673550] [2024-10-24 20:43:38,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001673550] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 20:43:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600491173] [2024-10-24 20:43:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:38,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:38,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:38,038 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) [2024-10-24 20:43:38,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 20:43:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:38,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 20:43:38,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:43:38,146 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 [2024-10-24 20:43:38,272 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 36 treesize of output 13 [2024-10-24 20:43:38,309 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 [2024-10-24 20:43:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 20:43:38,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 20:43:38,582 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 [2024-10-24 20:43:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:38,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600491173] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 20:43:38,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 20:43:38,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 26 [2024-10-24 20:43:38,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360662742] [2024-10-24 20:43:38,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 20:43:38,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-24 20:43:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-24 20:43:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2024-10-24 20:43:38,786 INFO L87 Difference]: Start difference. First operand 1028 states and 1444 transitions. Second operand has 28 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 24 states have internal predecessors, (43), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 20:43:41,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:41,047 INFO L93 Difference]: Finished difference Result 1968 states and 2187 transitions. [2024-10-24 20:43:41,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 20:43:41,048 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 24 states have internal predecessors, (43), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 21 [2024-10-24 20:43:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:41,058 INFO L225 Difference]: With dead ends: 1968 [2024-10-24 20:43:41,058 INFO L226 Difference]: Without dead ends: 1967 [2024-10-24 20:43:41,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2024-10-24 20:43:41,060 INFO L432 NwaCegarLoop]: 992 mSDtfsCounter, 4357 mSDsluCounter, 14896 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4368 SdHoareTripleChecker+Valid, 15888 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:41,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4368 Valid, 15888 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1978 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-10-24 20:43:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2024-10-24 20:43:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1030. [2024-10-24 20:43:41,096 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) [2024-10-24 20:43:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1446 transitions. [2024-10-24 20:43:41,101 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1446 transitions. Word has length 21 [2024-10-24 20:43:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:41,101 INFO L471 AbstractCegarLoop]: Abstraction has 1030 states and 1446 transitions. [2024-10-24 20:43:41,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 24 states have internal predecessors, (43), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 20:43:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1446 transitions. [2024-10-24 20:43:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-24 20:43:41,103 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:41,104 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 20:43:41,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 20:43:41,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:41,308 INFO L396 AbstractCegarLoop]: === Iteration 10 === 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)] === [2024-10-24 20:43:41,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:41,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1612062930, now seen corresponding path program 1 times [2024-10-24 20:43:41,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:41,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301162983] [2024-10-24 20:43:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:41,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:41,596 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 20:43:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:41,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 20:43:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 20:43:41,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:41,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301162983] [2024-10-24 20:43:41,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301162983] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 20:43:41,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21741016] [2024-10-24 20:43:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:41,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:41,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:41,944 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) [2024-10-24 20:43:41,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 20:43:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:42,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-24 20:43:42,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:43:42,055 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 [2024-10-24 20:43:42,060 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 [2024-10-24 20:43:42,286 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 36 treesize of output 13 [2024-10-24 20:43:42,398 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 20:43:42,399 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 [2024-10-24 20:43:42,435 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 [2024-10-24 20:43:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 20:43:42,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 20:43:42,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21741016] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 20:43:42,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 20:43:42,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 23 [2024-10-24 20:43:42,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506744470] [2024-10-24 20:43:42,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 20:43:42,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 20:43:42,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 20:43:42,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2024-10-24 20:43:42,739 INFO L87 Difference]: Start difference. First operand 1030 states and 1446 transitions. Second operand has 25 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 20:43:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:44,359 INFO L93 Difference]: Finished difference Result 1685 states and 2112 transitions. [2024-10-24 20:43:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 20:43:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-10-24 20:43:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:44,365 INFO L225 Difference]: With dead ends: 1685 [2024-10-24 20:43:44,365 INFO L226 Difference]: Without dead ends: 1684 [2024-10-24 20:43:44,366 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=1558, Unknown=0, NotChecked=0, Total=1806 [2024-10-24 20:43:44,367 INFO L432 NwaCegarLoop]: 490 mSDtfsCounter, 2387 mSDsluCounter, 7573 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 8063 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:44,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2397 Valid, 8063 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-24 20:43:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2024-10-24 20:43:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1076. [2024-10-24 20:43:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 771 states have (on average 1.8897535667963683) internal successors, (1457), 1032 states have internal predecessors, (1457), 32 states have call successors, (32), 11 states have call predecessors, (32), 16 states have return successors, (44), 33 states have call predecessors, (44), 32 states have call successors, (44) [2024-10-24 20:43:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1533 transitions. [2024-10-24 20:43:44,402 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1533 transitions. Word has length 22 [2024-10-24 20:43:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:44,403 INFO L471 AbstractCegarLoop]: Abstraction has 1076 states and 1533 transitions. [2024-10-24 20:43:44,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 20:43:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1533 transitions. [2024-10-24 20:43:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-24 20:43:44,404 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:44,404 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] [2024-10-24 20:43:44,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-24 20:43:44,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-24 20:43:44,605 INFO L396 AbstractCegarLoop]: === Iteration 11 === 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)] === [2024-10-24 20:43:44,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:44,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1016056783, now seen corresponding path program 1 times [2024-10-24 20:43:44,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:44,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793089256] [2024-10-24 20:43:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:44,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 20:43:44,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478240700] [2024-10-24 20:43:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:44,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:44,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:44,623 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) [2024-10-24 20:43:44,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 20:43:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:44,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-24 20:43:44,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:43:44,748 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 [2024-10-24 20:43:44,753 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 [2024-10-24 20:43:44,757 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 [2024-10-24 20:43:44,868 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 [2024-10-24 20:43:45,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 20:43:45,067 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 [2024-10-24 20:43:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:45,092 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 20:43:45,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:45,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793089256] [2024-10-24 20:43:45,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 20:43:45,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478240700] [2024-10-24 20:43:45,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478240700] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:45,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:45,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-24 20:43:45,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583268531] [2024-10-24 20:43:45,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:45,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 20:43:45,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:45,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 20:43:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-24 20:43:45,095 INFO L87 Difference]: Start difference. First operand 1076 states and 1533 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) [2024-10-24 20:43:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:46,454 INFO L93 Difference]: Finished difference Result 1595 states and 2060 transitions. [2024-10-24 20:43:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 20:43:46,455 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 [2024-10-24 20:43:46,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:46,461 INFO L225 Difference]: With dead ends: 1595 [2024-10-24 20:43:46,461 INFO L226 Difference]: Without dead ends: 1594 [2024-10-24 20:43:46,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2024-10-24 20:43:46,464 INFO L432 NwaCegarLoop]: 475 mSDtfsCounter, 1718 mSDsluCounter, 3840 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 4315 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:46,465 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1720 Valid, 4315 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-24 20:43:46,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2024-10-24 20:43:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1320. [2024-10-24 20:43:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1003 states have (on average 1.893320039880359) internal successors, (1899), 1264 states have internal predecessors, (1899), 41 states have call successors, (41), 13 states have call predecessors, (41), 19 states have return successors, (55), 42 states have call predecessors, (55), 41 states have call successors, (55) [2024-10-24 20:43:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1995 transitions. [2024-10-24 20:43:46,509 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1995 transitions. Word has length 23 [2024-10-24 20:43:46,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:46,511 INFO L471 AbstractCegarLoop]: Abstraction has 1320 states and 1995 transitions. [2024-10-24 20:43:46,511 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) [2024-10-24 20:43:46,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1995 transitions. [2024-10-24 20:43:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-24 20:43:46,514 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:46,514 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] [2024-10-24 20:43:46,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 20:43:46,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:46,715 INFO L396 AbstractCegarLoop]: === Iteration 12 === 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)] === [2024-10-24 20:43:46,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1432989252, now seen corresponding path program 1 times [2024-10-24 20:43:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:46,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056652121] [2024-10-24 20:43:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 20:43:46,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170000179] [2024-10-24 20:43:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:46,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:46,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:46,732 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) [2024-10-24 20:43:46,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 20:43:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:46,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-24 20:43:46,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:43:46,841 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 [2024-10-24 20:43:46,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-24 20:43:46,920 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 [2024-10-24 20:43:47,067 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 [2024-10-24 20:43:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:47,087 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 20:43:47,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:47,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056652121] [2024-10-24 20:43:47,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 20:43:47,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170000179] [2024-10-24 20:43:47,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170000179] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:47,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:47,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-24 20:43:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273215202] [2024-10-24 20:43:47,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:47,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 20:43:47,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 20:43:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-24 20:43:47,089 INFO L87 Difference]: Start difference. First operand 1320 states and 1995 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) [2024-10-24 20:43:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:48,055 INFO L93 Difference]: Finished difference Result 1594 states and 2059 transitions. [2024-10-24 20:43:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 20:43:48,055 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 [2024-10-24 20:43:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:48,060 INFO L225 Difference]: With dead ends: 1594 [2024-10-24 20:43:48,060 INFO L226 Difference]: Without dead ends: 1593 [2024-10-24 20:43:48,061 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 [2024-10-24 20:43:48,061 INFO L432 NwaCegarLoop]: 480 mSDtfsCounter, 1721 mSDsluCounter, 4664 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 5144 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:48,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1723 Valid, 5144 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-24 20:43:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2024-10-24 20:43:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1320. [2024-10-24 20:43:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1003 states have (on average 1.8923230309072783) internal successors, (1898), 1264 states have internal predecessors, (1898), 41 states have call successors, (41), 13 states have call predecessors, (41), 19 states have return successors, (55), 42 states have call predecessors, (55), 41 states have call successors, (55) [2024-10-24 20:43:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1994 transitions. [2024-10-24 20:43:48,097 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1994 transitions. Word has length 24 [2024-10-24 20:43:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:48,098 INFO L471 AbstractCegarLoop]: Abstraction has 1320 states and 1994 transitions. [2024-10-24 20:43:48,098 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) [2024-10-24 20:43:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1994 transitions. [2024-10-24 20:43:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 20:43:48,099 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:48,099 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] [2024-10-24 20:43:48,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 20:43:48,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:48,300 INFO L396 AbstractCegarLoop]: === Iteration 13 === 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)] === [2024-10-24 20:43:48,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1472993905, now seen corresponding path program 1 times [2024-10-24 20:43:48,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:48,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949966677] [2024-10-24 20:43:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:48,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 20:43:48,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342426521] [2024-10-24 20:43:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:48,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:48,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:48,316 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) [2024-10-24 20:43:48,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 20:43:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:48,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-24 20:43:48,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:43:48,418 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 [2024-10-24 20:43:48,421 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 [2024-10-24 20:43:48,428 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 [2024-10-24 20:43:48,629 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 [2024-10-24 20:43:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:48,650 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 20:43:48,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:48,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949966677] [2024-10-24 20:43:48,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 20:43:48,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342426521] [2024-10-24 20:43:48,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342426521] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:48,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:48,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 20:43:48,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585381648] [2024-10-24 20:43:48,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:48,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 20:43:48,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:48,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 20:43:48,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-24 20:43:48,652 INFO L87 Difference]: Start difference. First operand 1320 states and 1994 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2024-10-24 20:43:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:49,524 INFO L93 Difference]: Finished difference Result 1593 states and 2058 transitions. [2024-10-24 20:43:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 20:43:49,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 25 [2024-10-24 20:43:49,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:49,532 INFO L225 Difference]: With dead ends: 1593 [2024-10-24 20:43:49,532 INFO L226 Difference]: Without dead ends: 1592 [2024-10-24 20:43:49,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-10-24 20:43:49,535 INFO L432 NwaCegarLoop]: 478 mSDtfsCounter, 1233 mSDsluCounter, 3313 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 3791 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:49,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 3791 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-24 20:43:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2024-10-24 20:43:49,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1320. [2024-10-24 20:43:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1003 states have (on average 1.8913260219341974) internal successors, (1897), 1264 states have internal predecessors, (1897), 41 states have call successors, (41), 13 states have call predecessors, (41), 19 states have return successors, (55), 42 states have call predecessors, (55), 41 states have call successors, (55) [2024-10-24 20:43:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1993 transitions. [2024-10-24 20:43:49,585 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1993 transitions. Word has length 25 [2024-10-24 20:43:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:49,586 INFO L471 AbstractCegarLoop]: Abstraction has 1320 states and 1993 transitions. [2024-10-24 20:43:49,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2024-10-24 20:43:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1993 transitions. [2024-10-24 20:43:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 20:43:49,587 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:49,587 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] [2024-10-24 20:43:49,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 20:43:49,788 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,SelfDestructingSolverStorable12 [2024-10-24 20:43:49,788 INFO L396 AbstractCegarLoop]: === Iteration 14 === 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)] === [2024-10-24 20:43:49,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:49,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1581829146, now seen corresponding path program 1 times [2024-10-24 20:43:49,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:49,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326055355] [2024-10-24 20:43:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:49,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 20:43:49,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644258997] [2024-10-24 20:43:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:49,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:49,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:49,808 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) [2024-10-24 20:43:49,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 20:43:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:49,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-24 20:43:49,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:43:49,935 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 [2024-10-24 20:43:49,939 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 [2024-10-24 20:43:49,948 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 [2024-10-24 20:43:50,117 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 [2024-10-24 20:43:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:50,145 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 20:43:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:50,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326055355] [2024-10-24 20:43:50,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 20:43:50,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644258997] [2024-10-24 20:43:50,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644258997] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:50,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:50,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 20:43:50,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369162014] [2024-10-24 20:43:50,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:50,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 20:43:50,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:50,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 20:43:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-24 20:43:50,147 INFO L87 Difference]: Start difference. First operand 1320 states and 1993 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2024-10-24 20:43:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:43:50,803 INFO L93 Difference]: Finished difference Result 1592 states and 2057 transitions. [2024-10-24 20:43:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 20:43:50,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 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 [2024-10-24 20:43:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:43:50,807 INFO L225 Difference]: With dead ends: 1592 [2024-10-24 20:43:50,807 INFO L226 Difference]: Without dead ends: 1591 [2024-10-24 20:43:50,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-10-24 20:43:50,809 INFO L432 NwaCegarLoop]: 479 mSDtfsCounter, 1709 mSDsluCounter, 2483 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 20:43:50,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1711 Valid, 2962 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 20:43:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2024-10-24 20:43:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1320. [2024-10-24 20:43:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1003 states have (on average 1.8903290129611166) internal successors, (1896), 1264 states have internal predecessors, (1896), 41 states have call successors, (41), 13 states have call predecessors, (41), 19 states have return successors, (55), 42 states have call predecessors, (55), 41 states have call successors, (55) [2024-10-24 20:43:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1992 transitions. [2024-10-24 20:43:50,877 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1992 transitions. Word has length 26 [2024-10-24 20:43:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:43:50,877 INFO L471 AbstractCegarLoop]: Abstraction has 1320 states and 1992 transitions. [2024-10-24 20:43:50,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 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) [2024-10-24 20:43:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1992 transitions. [2024-10-24 20:43:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-24 20:43:50,878 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:43:50,879 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] [2024-10-24 20:43:50,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 20:43:51,082 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,SelfDestructingSolverStorable13 [2024-10-24 20:43:51,083 INFO L396 AbstractCegarLoop]: === Iteration 15 === 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)] === [2024-10-24 20:43:51,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:43:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1792063213, now seen corresponding path program 1 times [2024-10-24 20:43:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:43:51,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118918000] [2024-10-24 20:43:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:51,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:43:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 20:43:51,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359182955] [2024-10-24 20:43:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:43:51,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:43:51,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:43:51,101 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) [2024-10-24 20:43:51,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 20:43:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:43:51,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-24 20:43:51,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:43:51,208 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 [2024-10-24 20:43:51,211 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 [2024-10-24 20:43:51,216 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 [2024-10-24 20:43:51,516 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 20:43:51,516 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 [2024-10-24 20:43:51,720 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 [2024-10-24 20:43:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:43:51,757 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 20:43:51,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:43:51,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118918000] [2024-10-24 20:43:51,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 20:43:51,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359182955] [2024-10-24 20:43:51,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359182955] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:43:51,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:43:51,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-24 20:43:51,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479858392] [2024-10-24 20:43:51,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:43:51,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 20:43:51,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:43:51,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 20:43:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-10-24 20:43:51,759 INFO L87 Difference]: Start difference. First operand 1320 states and 1992 transitions. Second operand has 14 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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) [2024-10-24 20:43:55,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 20:44:00,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 20:44:04,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 20:44:08,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 20:44:12,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 20:44:16,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 20:44:20,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-24 20:44:24,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-24 20:44:29,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-24 20:44:33,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-24 20:44:37,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-24 20:44:41,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 20:44:45,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-24 20:44:49,586 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] [2024-10-24 20:44:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:44:49,672 INFO L93 Difference]: Finished difference Result 1591 states and 2056 transitions. [2024-10-24 20:44:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 20:44:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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 27 [2024-10-24 20:44:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:44:49,677 INFO L225 Difference]: With dead ends: 1591 [2024-10-24 20:44:49,677 INFO L226 Difference]: Without dead ends: 1590 [2024-10-24 20:44:49,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2024-10-24 20:44:49,678 INFO L432 NwaCegarLoop]: 481 mSDtfsCounter, 2110 mSDsluCounter, 4542 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 52 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2112 SdHoareTripleChecker+Valid, 5023 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.6s IncrementalHoareTripleChecker+Time [2024-10-24 20:44:49,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2112 Valid, 5023 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 910 Invalid, 15 Unknown, 0 Unchecked, 57.6s Time] [2024-10-24 20:44:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2024-10-24 20:44:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1320. [2024-10-24 20:44:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1003 states have (on average 1.889332003988036) internal successors, (1895), 1264 states have internal predecessors, (1895), 41 states have call successors, (41), 13 states have call predecessors, (41), 19 states have return successors, (55), 42 states have call predecessors, (55), 41 states have call successors, (55) [2024-10-24 20:44:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1991 transitions. [2024-10-24 20:44:49,717 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1991 transitions. Word has length 27 [2024-10-24 20:44:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:44:49,717 INFO L471 AbstractCegarLoop]: Abstraction has 1320 states and 1991 transitions. [2024-10-24 20:44:49,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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) [2024-10-24 20:44:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1991 transitions. [2024-10-24 20:44:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 20:44:49,718 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:44:49,718 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] [2024-10-24 20:44:49,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-24 20:44:49,919 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,SelfDestructingSolverStorable14 [2024-10-24 20:44:49,919 INFO L396 AbstractCegarLoop]: === Iteration 16 === 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)] === [2024-10-24 20:44:49,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:44:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash 280615304, now seen corresponding path program 1 times [2024-10-24 20:44:49,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:44:49,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614135154] [2024-10-24 20:44:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:44:49,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:44:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 20:44:49,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927406874] [2024-10-24 20:44:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:44:49,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:44:49,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:44:49,941 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) [2024-10-24 20:44:49,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 20:44:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:44:50,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-24 20:44:50,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:44:50,069 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 [2024-10-24 20:44:50,071 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 [2024-10-24 20:44:50,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-24 20:44:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 20:44:50,340 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 20:44:50,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:44:50,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614135154] [2024-10-24 20:44:50,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 20:44:50,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927406874] [2024-10-24 20:44:50,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927406874] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 20:44:50,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 20:44:50,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-24 20:44:50,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875760993] [2024-10-24 20:44:50,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 20:44:50,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 20:44:50,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:44:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 20:44:50,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-10-24 20:44:50,342 INFO L87 Difference]: Start difference. First operand 1320 states and 1991 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) [2024-10-24 20:44:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 20:44:51,251 INFO L93 Difference]: Finished difference Result 1590 states and 2055 transitions. [2024-10-24 20:44:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 20:44:51,252 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 [2024-10-24 20:44:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 20:44:51,256 INFO L225 Difference]: With dead ends: 1590 [2024-10-24 20:44:51,256 INFO L226 Difference]: Without dead ends: 1589 [2024-10-24 20:44:51,256 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 [2024-10-24 20:44:51,257 INFO L432 NwaCegarLoop]: 500 mSDtfsCounter, 1614 mSDsluCounter, 3744 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 46 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1622 SdHoareTripleChecker+Valid, 4244 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-24 20:44:51,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1622 Valid, 4244 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 637 Invalid, 21 Unknown, 0 Unchecked, 0.7s Time] [2024-10-24 20:44:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2024-10-24 20:44:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1320. [2024-10-24 20:44:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1003 states have (on average 1.888334995014955) internal successors, (1894), 1264 states have internal predecessors, (1894), 41 states have call successors, (41), 13 states have call predecessors, (41), 19 states have return successors, (55), 42 states have call predecessors, (55), 41 states have call successors, (55) [2024-10-24 20:44:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1990 transitions. [2024-10-24 20:44:51,309 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1990 transitions. Word has length 28 [2024-10-24 20:44:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 20:44:51,310 INFO L471 AbstractCegarLoop]: Abstraction has 1320 states and 1990 transitions. [2024-10-24 20:44:51,310 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) [2024-10-24 20:44:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1990 transitions. [2024-10-24 20:44:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-24 20:44:51,311 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 20:44:51,311 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 20:44:51,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 20:44:51,515 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,SelfDestructingSolverStorable15 [2024-10-24 20:44:51,516 INFO L396 AbstractCegarLoop]: === Iteration 17 === 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)] === [2024-10-24 20:44:51,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 20:44:51,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1161185275, now seen corresponding path program 2 times [2024-10-24 20:44:51,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 20:44:51,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484005885] [2024-10-24 20:44:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 20:44:51,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 20:44:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:44:51,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 20:44:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:44:52,205 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 20:44:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:44:52,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 20:44:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 20:44:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 20:44:52,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 20:44:52,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484005885] [2024-10-24 20:44:52,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484005885] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 20:44:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575578307] [2024-10-24 20:44:52,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 20:44:52,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 20:44:52,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 20:44:52,477 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) [2024-10-24 20:44:52,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 20:44:52,602 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 20:44:52,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 20:44:52,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-24 20:44:52,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 20:44:52,617 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 [2024-10-24 20:44:52,621 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 [2024-10-24 20:44:53,103 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 36 treesize of output 13 [2024-10-24 20:44:53,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 20:44:53,265 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 [2024-10-24 20:44:53,317 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 [2024-10-24 20:44:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 20:44:53,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 20:44:53,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575578307] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 20:44:53,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 20:44:53,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 29 [2024-10-24 20:44:53,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36702343] [2024-10-24 20:44:53,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 20:44:53,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-24 20:44:53,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 20:44:53,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-24 20:44:53,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2024-10-24 20:44:53,962 INFO L87 Difference]: Start difference. First operand 1320 states and 1990 transitions. Second operand has 31 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 26 states have internal predecessors, (40), 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)