./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 61a67961 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-wip.fs.cvc5-61a6796-m [2024-10-14 21:13:38,005 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 21:13:38,071 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-10-14 21:13:38,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 21:13:38,075 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 21:13:38,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 21:13:38,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 21:13:38,108 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 21:13:38,108 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 21:13:38,109 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 21:13:38,109 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 21:13:38,113 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 21:13:38,114 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 21:13:38,114 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 21:13:38,114 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 21:13:38,115 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 21:13:38,115 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 21:13:38,115 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 21:13:38,115 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 21:13:38,116 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 21:13:38,116 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 21:13:38,118 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 21:13:38,119 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 21:13:38,119 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 21:13:38,119 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 21:13:38,119 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-10-14 21:13:38,119 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 21:13:38,120 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 21:13:38,120 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 21:13:38,120 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 21:13:38,120 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 21:13:38,120 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 21:13:38,121 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 21:13:38,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 21:13:38,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 21:13:38,122 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 21:13:38,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 21:13:38,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 21:13:38,125 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 21:13:38,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 21:13:38,126 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 21:13:38,126 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 21:13:38,126 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 21:13:38,126 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 21:13:38,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a9aad6636e75eb788a44e63e1649ee5df89ecae877c31a886978a8e3fdd2e8f [2024-10-14 21:13:38,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 21:13:38,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 21:13:38,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 21:13:38,368 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 21:13:38,369 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 21:13:38,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c [2024-10-14 21:13:39,780 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 21:13:39,941 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 21:13:39,942 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra.c [2024-10-14 21:13:39,952 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c72012a2/e7659eedab7847c0a0e5da37883ba28d/FLAG735babae6 [2024-10-14 21:13:40,350 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c72012a2/e7659eedab7847c0a0e5da37883ba28d [2024-10-14 21:13:40,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 21:13:40,360 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 21:13:40,361 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 21:13:40,363 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 21:13:40,368 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 21:13:40,369 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347ff57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40, skipping insertion in model container [2024-10-14 21:13:40,370 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,390 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 21:13:40,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 21:13:40,577 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 21:13:40,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 21:13:40,627 INFO L204 MainTranslator]: Completed translation [2024-10-14 21:13:40,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40 WrapperNode [2024-10-14 21:13:40,627 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 21:13:40,628 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 21:13:40,628 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 21:13:40,629 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 21:13:40,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,662 INFO L138 Inliner]: procedures = 17, calls = 172, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 185 [2024-10-14 21:13:40,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 21:13:40,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 21:13:40,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 21:13:40,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 21:13:40,674 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,683 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,735 INFO L175 MemorySlicer]: Split 138 memory accesses to 6 slices as follows [2, 35, 20, 29, 22, 30]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 3, 1, 3, 2, 2]. [2024-10-14 21:13:40,735 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,750 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,752 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,759 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,765 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,802 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 21:13:40,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 21:13:40,805 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 21:13:40,806 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 21:13:40,806 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (1/1) ... [2024-10-14 21:13:40,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 21:13:40,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:13:40,835 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) [2024-10-14 21:13:40,837 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 [2024-10-14 21:13:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 21:13:40,885 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_28_to_32_0 [2024-10-14 21:13:40,885 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_28_to_32_0 [2024-10-14 21:13:40,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 21:13:40,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 21:13:40,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 21:13:40,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-14 21:13:40,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-14 21:13:40,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-14 21:13:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 21:13:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 21:13:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 21:13:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 21:13:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-14 21:13:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-14 21:13:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-14 21:13:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 21:13:40,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 21:13:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 21:13:40,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 21:13:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 21:13:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-14 21:13:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-14 21:13:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-14 21:13:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-14 21:13:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-14 21:13:40,889 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_36_to_52_0 [2024-10-14 21:13:40,889 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_36_to_52_0 [2024-10-14 21:13:40,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 21:13:41,007 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 21:13:41,009 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 21:13:43,078 INFO L? ?]: Removed 1170 outVars from TransFormulas that were not future-live. [2024-10-14 21:13:43,078 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 21:13:43,121 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 21:13:43,122 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 21:13:43,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:13:43 BoogieIcfgContainer [2024-10-14 21:13:43,122 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 21:13:43,124 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 21:13:43,124 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 21:13:43,127 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 21:13:43,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:13:40" (1/3) ... [2024-10-14 21:13:43,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613858af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:13:43, skipping insertion in model container [2024-10-14 21:13:43,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:13:40" (2/3) ... [2024-10-14 21:13:43,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613858af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:13:43, skipping insertion in model container [2024-10-14 21:13:43,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:13:43" (3/3) ... [2024-10-14 21:13:43,129 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra.c [2024-10-14 21:13:43,144 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 21:13:43,144 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 258 error locations. [2024-10-14 21:13:43,212 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 21:13:43,219 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;@76e51417, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 21:13:43,220 INFO L334 AbstractCegarLoop]: Starting to check reachability of 258 error locations. [2024-10-14 21:13:43,224 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) [2024-10-14 21:13:43,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 21:13:43,229 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:43,230 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 21:13:43,231 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)] === [2024-10-14 21:13:43,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1883854585, now seen corresponding path program 1 times [2024-10-14 21:13:43,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:43,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386889822] [2024-10-14 21:13:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:43,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:43,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:13:43,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386889822] [2024-10-14 21:13:43,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386889822] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:13:43,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:13:43,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 21:13:43,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118259603] [2024-10-14 21:13:43,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:13:43,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 21:13:43,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:13:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 21:13:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 21:13:43,797 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) [2024-10-14 21:13:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:13:44,040 INFO L93 Difference]: Finished difference Result 1112 states and 1155 transitions. [2024-10-14 21:13:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 21:13:44,043 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 [2024-10-14 21:13:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:13:44,056 INFO L225 Difference]: With dead ends: 1112 [2024-10-14 21:13:44,056 INFO L226 Difference]: Without dead ends: 562 [2024-10-14 21:13:44,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-14 21:13:44,067 INFO L432 NwaCegarLoop]: 558 mSDtfsCounter, 13 mSDsluCounter, 2143 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 21:13:44,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2701 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 21:13:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2024-10-14 21:13:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 559. [2024-10-14 21:13:44,128 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) [2024-10-14 21:13:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 571 transitions. [2024-10-14 21:13:44,134 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 571 transitions. Word has length 6 [2024-10-14 21:13:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:13:44,134 INFO L471 AbstractCegarLoop]: Abstraction has 559 states and 571 transitions. [2024-10-14 21:13:44,134 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) [2024-10-14 21:13:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 571 transitions. [2024-10-14 21:13:44,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-14 21:13:44,136 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:44,136 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:13:44,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 21:13:44,137 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)] === [2024-10-14 21:13:44,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:44,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1730049565, now seen corresponding path program 1 times [2024-10-14 21:13:44,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:44,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458494422] [2024-10-14 21:13:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:44,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:44,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:13:44,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458494422] [2024-10-14 21:13:44,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458494422] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:13:44,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:13:44,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 21:13:44,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125551687] [2024-10-14 21:13:44,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:13:44,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 21:13:44,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:13:44,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 21:13:44,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 21:13:44,284 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) [2024-10-14 21:13:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:13:44,426 INFO L93 Difference]: Finished difference Result 562 states and 575 transitions. [2024-10-14 21:13:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 21:13:44,426 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 [2024-10-14 21:13:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:13:44,428 INFO L225 Difference]: With dead ends: 562 [2024-10-14 21:13:44,429 INFO L226 Difference]: Without dead ends: 561 [2024-10-14 21:13:44,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-10-14 21:13:44,430 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 [2024-10-14 21:13:44,430 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] [2024-10-14 21:13:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2024-10-14 21:13:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 560. [2024-10-14 21:13:44,447 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) [2024-10-14 21:13:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 572 transitions. [2024-10-14 21:13:44,448 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 572 transitions. Word has length 7 [2024-10-14 21:13:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:13:44,449 INFO L471 AbstractCegarLoop]: Abstraction has 560 states and 572 transitions. [2024-10-14 21:13:44,449 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) [2024-10-14 21:13:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 572 transitions. [2024-10-14 21:13:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 21:13:44,449 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:44,449 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:13:44,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 21:13:44,450 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)] === [2024-10-14 21:13:44,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1172955234, now seen corresponding path program 1 times [2024-10-14 21:13:44,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:44,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934102733] [2024-10-14 21:13:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:44,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:44,539 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 21:13:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:44,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:13:44,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934102733] [2024-10-14 21:13:44,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934102733] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:13:44,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:13:44,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 21:13:44,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512812537] [2024-10-14 21:13:44,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:13:44,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 21:13:44,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:13:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 21:13:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-14 21:13:44,551 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) [2024-10-14 21:13:44,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:13:44,983 INFO L93 Difference]: Finished difference Result 1086 states and 1107 transitions. [2024-10-14 21:13:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 21:13:44,988 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 [2024-10-14 21:13:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:13:44,991 INFO L225 Difference]: With dead ends: 1086 [2024-10-14 21:13:44,991 INFO L226 Difference]: Without dead ends: 1084 [2024-10-14 21:13:44,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-14 21:13:44,993 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 [2024-10-14 21:13:44,993 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] [2024-10-14 21:13:44,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2024-10-14 21:13:45,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 757. [2024-10-14 21:13:45,010 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) [2024-10-14 21:13:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 950 transitions. [2024-10-14 21:13:45,012 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 950 transitions. Word has length 11 [2024-10-14 21:13:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:13:45,012 INFO L471 AbstractCegarLoop]: Abstraction has 757 states and 950 transitions. [2024-10-14 21:13:45,012 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) [2024-10-14 21:13:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 950 transitions. [2024-10-14 21:13:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-14 21:13:45,013 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:45,013 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 21:13:45,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 21:13:45,013 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)] === [2024-10-14 21:13:45,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:45,014 INFO L85 PathProgramCache]: Analyzing trace with hash 982485849, now seen corresponding path program 1 times [2024-10-14 21:13:45,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:45,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212215538] [2024-10-14 21:13:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:45,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:45,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:13:45,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212215538] [2024-10-14 21:13:45,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212215538] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:13:45,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344818948] [2024-10-14 21:13:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:45,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:45,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:13:45,240 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) [2024-10-14 21:13:45,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 21:13:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:45,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 21:13:45,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:13:45,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 21:13:45,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 21:13:45,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-14 21:13:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:45,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:13:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:45,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344818948] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 21:13:45,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 21:13:45,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-14 21:13:45,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801447681] [2024-10-14 21:13:45,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 21:13:45,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 21:13:45,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:13:45,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 21:13:45,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-10-14 21:13:45,618 INFO L87 Difference]: Start difference. First operand 757 states and 950 transitions. Second operand has 21 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 21:13:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:13:46,008 INFO L93 Difference]: Finished difference Result 761 states and 960 transitions. [2024-10-14 21:13:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 21:13:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-14 21:13:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:13:46,011 INFO L225 Difference]: With dead ends: 761 [2024-10-14 21:13:46,011 INFO L226 Difference]: Without dead ends: 760 [2024-10-14 21:13:46,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2024-10-14 21:13:46,014 INFO L432 NwaCegarLoop]: 556 mSDtfsCounter, 29 mSDsluCounter, 5247 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 5803 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 21:13:46,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 5803 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 21:13:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-10-14 21:13:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 756. [2024-10-14 21:13:46,039 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) [2024-10-14 21:13:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 949 transitions. [2024-10-14 21:13:46,042 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 949 transitions. Word has length 12 [2024-10-14 21:13:46,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:13:46,042 INFO L471 AbstractCegarLoop]: Abstraction has 756 states and 949 transitions. [2024-10-14 21:13:46,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 21:13:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 949 transitions. [2024-10-14 21:13:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-14 21:13:46,043 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:46,043 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:13:46,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 21:13:46,244 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 [2024-10-14 21:13:46,244 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)] === [2024-10-14 21:13:46,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:46,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1928547136, now seen corresponding path program 1 times [2024-10-14 21:13:46,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:46,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125358269] [2024-10-14 21:13:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:46,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:46,417 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 21:13:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:46,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:13:46,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125358269] [2024-10-14 21:13:46,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125358269] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:13:46,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:13:46,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 21:13:46,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103956868] [2024-10-14 21:13:46,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:13:46,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 21:13:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:13:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 21:13:46,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 21:13:46,439 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) [2024-10-14 21:13:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:13:46,973 INFO L93 Difference]: Finished difference Result 1269 states and 1472 transitions. [2024-10-14 21:13:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 21:13:46,974 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 [2024-10-14 21:13:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:13:46,978 INFO L225 Difference]: With dead ends: 1269 [2024-10-14 21:13:46,978 INFO L226 Difference]: Without dead ends: 1267 [2024-10-14 21:13:46,978 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 [2024-10-14 21:13:46,979 INFO L432 NwaCegarLoop]: 495 mSDtfsCounter, 1600 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 3059 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 21:13:46,979 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 3059 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 21:13:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2024-10-14 21:13:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 950. [2024-10-14 21:13:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 660 states have (on average 1.9212121212121211) internal successors, (1268), 918 states have internal predecessors, (1268), 25 states have call successors, (25), 6 states have call predecessors, (25), 8 states have return successors, (30), 25 states have call predecessors, (30), 25 states have call successors, (30) [2024-10-14 21:13:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1323 transitions. [2024-10-14 21:13:47,003 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1323 transitions. Word has length 13 [2024-10-14 21:13:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:13:47,003 INFO L471 AbstractCegarLoop]: Abstraction has 950 states and 1323 transitions. [2024-10-14 21:13:47,004 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) [2024-10-14 21:13:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1323 transitions. [2024-10-14 21:13:47,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-14 21:13:47,004 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:47,004 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-14 21:13:47,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 21:13:47,005 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)] === [2024-10-14 21:13:47,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:47,005 INFO L85 PathProgramCache]: Analyzing trace with hash 392290691, now seen corresponding path program 1 times [2024-10-14 21:13:47,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:47,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520549587] [2024-10-14 21:13:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:47,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:47,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:13:47,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520549587] [2024-10-14 21:13:47,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520549587] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:13:47,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722030287] [2024-10-14 21:13:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:47,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:47,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:13:47,182 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) [2024-10-14 21:13:47,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 21:13:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:47,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 21:13:47,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:13:47,253 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 [2024-10-14 21:13:47,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 21:13:47,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-10-14 21:13:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:47,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:13:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:47,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722030287] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 21:13:47,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 21:13:47,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-14 21:13:47,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535338595] [2024-10-14 21:13:47,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 21:13:47,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 21:13:47,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:13:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 21:13:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-10-14 21:13:47,428 INFO L87 Difference]: Start difference. First operand 950 states and 1323 transitions. Second operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 21:13:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:13:47,918 INFO L93 Difference]: Finished difference Result 981 states and 1362 transitions. [2024-10-14 21:13:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 21:13:47,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-14 21:13:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:13:47,922 INFO L225 Difference]: With dead ends: 981 [2024-10-14 21:13:47,922 INFO L226 Difference]: Without dead ends: 980 [2024-10-14 21:13:47,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-10-14 21:13:47,923 INFO L432 NwaCegarLoop]: 556 mSDtfsCounter, 64 mSDsluCounter, 5266 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 5822 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 21:13:47,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 5822 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 21:13:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2024-10-14 21:13:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 980. [2024-10-14 21:13:47,938 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) [2024-10-14 21:13:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1359 transitions. [2024-10-14 21:13:47,941 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1359 transitions. Word has length 13 [2024-10-14 21:13:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:13:47,941 INFO L471 AbstractCegarLoop]: Abstraction has 980 states and 1359 transitions. [2024-10-14 21:13:47,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 21:13:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1359 transitions. [2024-10-14 21:13:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 21:13:47,942 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:47,942 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] [2024-10-14 21:13:47,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 21:13:48,142 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 [2024-10-14 21:13:48,143 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_36_to_52_0Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-14 21:13:48,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:48,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1605524781, now seen corresponding path program 1 times [2024-10-14 21:13:48,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:48,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748800722] [2024-10-14 21:13:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:48,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:13:48,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952771567] [2024-10-14 21:13:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:48,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:48,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:13:48,173 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) [2024-10-14 21:13:48,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 21:13:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:48,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 21:13:48,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:13:48,253 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 [2024-10-14 21:13:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:48,370 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 21:13:48,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:13:48,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748800722] [2024-10-14 21:13:48,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:13:48,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952771567] [2024-10-14 21:13:48,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952771567] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:13:48,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:13:48,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 21:13:48,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891135030] [2024-10-14 21:13:48,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:13:48,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 21:13:48,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:13:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 21:13:48,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-14 21:13:48,372 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) [2024-10-14 21:13:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:13:48,681 INFO L93 Difference]: Finished difference Result 1315 states and 1520 transitions. [2024-10-14 21:13:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 21:13:48,683 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 [2024-10-14 21:13:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:13:48,688 INFO L225 Difference]: With dead ends: 1315 [2024-10-14 21:13:48,688 INFO L226 Difference]: Without dead ends: 1313 [2024-10-14 21:13:48,689 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 [2024-10-14 21:13:48,689 INFO L432 NwaCegarLoop]: 522 mSDtfsCounter, 1034 mSDsluCounter, 2446 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 21:13:48,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 2968 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 21:13:48,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2024-10-14 21:13:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1028. [2024-10-14 21:13:48,708 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) [2024-10-14 21:13:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1444 transitions. [2024-10-14 21:13:48,711 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1444 transitions. Word has length 21 [2024-10-14 21:13:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:13:48,711 INFO L471 AbstractCegarLoop]: Abstraction has 1028 states and 1444 transitions. [2024-10-14 21:13:48,711 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) [2024-10-14 21:13:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1444 transitions. [2024-10-14 21:13:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 21:13:48,712 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:48,712 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:13:48,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 21:13:48,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:48,916 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_36_to_52_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-14 21:13:48,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1749113289, now seen corresponding path program 1 times [2024-10-14 21:13:48,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:48,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853184119] [2024-10-14 21:13:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:48,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:49,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 21:13:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:49,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 21:13:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 21:13:49,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:13:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853184119] [2024-10-14 21:13:49,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853184119] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:13:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145075406] [2024-10-14 21:13:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:49,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:49,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:13:49,482 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) [2024-10-14 21:13:49,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 21:13:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:49,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-14 21:13:49,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:13:49,584 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 [2024-10-14 21:13:49,588 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 [2024-10-14 21:13:49,827 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_28_to_32_0_#t~mem98_13| Int)) (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base|))) (and (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base| (store .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset| (* |v_func_to_recursive_line_28_to_32_0_#t~mem98_13| 4)))) (<= (select .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset|) |v_func_to_recursive_line_28_to_32_0_#t~mem98_13|)))) (exists ((|v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#p~0#1.offset_BEFORE_CALL_3| Int)) (<= 0 (select (select |c_#memory_int#3| |v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_main_~#p~0#1.offset_BEFORE_CALL_3|)))) is different from true [2024-10-14 21:13:49,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 21:13:50,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 21:13:50,033 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 [2024-10-14 21:13:50,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-10-14 21:13:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-14 21:13:50,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:13:50,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145075406] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:13:50,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 21:13:50,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 23 [2024-10-14 21:13:50,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854216301] [2024-10-14 21:13:50,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 21:13:50,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-14 21:13:50,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:13:50,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-14 21:13:50,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=843, Unknown=1, NotChecked=58, Total=992 [2024-10-14 21:13:50,356 INFO L87 Difference]: Start difference. First operand 1028 states and 1444 transitions. Second operand has 25 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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) [2024-10-14 21:13:53,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:13:53,755 INFO L93 Difference]: Finished difference Result 2380 states and 2651 transitions. [2024-10-14 21:13:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-14 21:13:53,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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 21 [2024-10-14 21:13:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:13:53,763 INFO L225 Difference]: With dead ends: 2380 [2024-10-14 21:13:53,763 INFO L226 Difference]: Without dead ends: 2379 [2024-10-14 21:13:53,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=1746, Unknown=1, NotChecked=86, Total=2070 [2024-10-14 21:13:53,765 INFO L432 NwaCegarLoop]: 1439 mSDtfsCounter, 2991 mSDsluCounter, 20729 mSDsCounter, 0 mSdLazyCounter, 3171 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3009 SdHoareTripleChecker+Valid, 22168 SdHoareTripleChecker+Invalid, 5393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2146 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-10-14 21:13:53,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3009 Valid, 22168 Invalid, 5393 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 3171 Invalid, 0 Unknown, 2146 Unchecked, 2.8s Time] [2024-10-14 21:13:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2024-10-14 21:13:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1468. [2024-10-14 21:13:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1145 states have (on average 1.9004366812227074) internal successors, (2176), 1406 states have internal predecessors, (2176), 46 states have call successors, (46), 13 states have call predecessors, (46), 20 states have return successors, (66), 48 states have call predecessors, (66), 46 states have call successors, (66) [2024-10-14 21:13:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 2288 transitions. [2024-10-14 21:13:53,807 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 2288 transitions. Word has length 21 [2024-10-14 21:13:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:13:53,807 INFO L471 AbstractCegarLoop]: Abstraction has 1468 states and 2288 transitions. [2024-10-14 21:13:53,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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) [2024-10-14 21:13:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 2288 transitions. [2024-10-14 21:13:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-14 21:13:53,808 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:53,808 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:13:53,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 21:13:54,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:54,013 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_36_to_52_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-14 21:13:54,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:54,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1612062930, now seen corresponding path program 1 times [2024-10-14 21:13:54,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:54,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83383751] [2024-10-14 21:13:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:54,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:54,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 21:13:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:54,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 21:13:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 21:13:54,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:13:54,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83383751] [2024-10-14 21:13:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83383751] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:13:54,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886891982] [2024-10-14 21:13:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:54,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:54,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:13:54,425 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) [2024-10-14 21:13:54,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 21:13:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:54,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-14 21:13:54,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:13:54,520 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 [2024-10-14 21:13:54,524 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 [2024-10-14 21:13:54,621 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_28_to_32_0_#t~mem98_20| Int)) (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base|))) (and (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base| (store .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset| (* |v_func_to_recursive_line_28_to_32_0_#t~mem98_20| 4)))) (<= |v_func_to_recursive_line_28_to_32_0_#t~mem98_20| (select .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset|))))) (exists ((|v_ULTIMATE.start_main_~#p~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_6| Int)) (<= (select (select |c_#memory_int#3| |v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_6|) |v_ULTIMATE.start_main_~#p~0#1.offset_BEFORE_CALL_6|) 0))) is different from true [2024-10-14 21:13:54,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 21:13:54,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 21:13:54,773 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 [2024-10-14 21:13:54,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-10-14 21:13:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-14 21:13:54,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:13:55,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886891982] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:13:55,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 21:13:55,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2024-10-14 21:13:55,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878458152] [2024-10-14 21:13:55,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 21:13:55,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 21:13:55,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:13:55,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 21:13:55,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=772, Unknown=1, NotChecked=56, Total=930 [2024-10-14 21:13:55,056 INFO L87 Difference]: Start difference. First operand 1468 states and 2288 transitions. Second operand has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 21:13:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:13:57,584 INFO L93 Difference]: Finished difference Result 2075 states and 2519 transitions. [2024-10-14 21:13:57,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 21:13:57,584 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2024-10-14 21:13:57,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:13:57,590 INFO L225 Difference]: With dead ends: 2075 [2024-10-14 21:13:57,590 INFO L226 Difference]: Without dead ends: 2074 [2024-10-14 21:13:57,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=1405, Unknown=1, NotChecked=78, Total=1722 [2024-10-14 21:13:57,591 INFO L432 NwaCegarLoop]: 983 mSDtfsCounter, 2481 mSDsluCounter, 10801 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2491 SdHoareTripleChecker+Valid, 11784 SdHoareTripleChecker+Invalid, 3642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1633 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-10-14 21:13:57,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2491 Valid, 11784 Invalid, 3642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1946 Invalid, 0 Unknown, 1633 Unchecked, 2.1s Time] [2024-10-14 21:13:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2024-10-14 21:13:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1482. [2024-10-14 21:13:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1157 states have (on average 1.8997407087294729) internal successors, (2198), 1419 states have internal predecessors, (2198), 47 states have call successors, (47), 13 states have call predecessors, (47), 21 states have return successors, (69), 49 states have call predecessors, (69), 47 states have call successors, (69) [2024-10-14 21:13:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2314 transitions. [2024-10-14 21:13:57,625 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2314 transitions. Word has length 22 [2024-10-14 21:13:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:13:57,625 INFO L471 AbstractCegarLoop]: Abstraction has 1482 states and 2314 transitions. [2024-10-14 21:13:57,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 21:13:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2314 transitions. [2024-10-14 21:13:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 21:13:57,626 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:57,626 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] [2024-10-14 21:13:57,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 21:13:57,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:57,830 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_36_to_52_0Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_36_to_52_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_36_to_52_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 256 more)] === [2024-10-14 21:13:57,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1016056783, now seen corresponding path program 1 times [2024-10-14 21:13:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:57,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752548280] [2024-10-14 21:13:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:13:57,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102351124] [2024-10-14 21:13:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:57,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:57,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:13:57,853 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) [2024-10-14 21:13:57,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 21:13:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:13:57,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-14 21:13:57,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:13:57,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 21:13:57,957 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 [2024-10-14 21:13:57,960 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 [2024-10-14 21:13:58,270 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 21:13:58,270 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 [2024-10-14 21:13:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:13:58,289 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 21:13:58,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:13:58,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752548280] [2024-10-14 21:13:58,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:13:58,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102351124] [2024-10-14 21:13:58,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102351124] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:13:58,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:13:58,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-14 21:13:58,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56175425] [2024-10-14 21:13:58,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:13:58,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 21:13:58,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:13:58,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 21:13:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-14 21:13:58,295 INFO L87 Difference]: Start difference. First operand 1482 states and 2314 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) [2024-10-14 21:13:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:13:59,643 INFO L93 Difference]: Finished difference Result 1809 states and 2470 transitions. [2024-10-14 21:13:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 21:13:59,644 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 [2024-10-14 21:13:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:13:59,649 INFO L225 Difference]: With dead ends: 1809 [2024-10-14 21:13:59,650 INFO L226 Difference]: Without dead ends: 1807 [2024-10-14 21:13:59,650 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 [2024-10-14 21:13:59,651 INFO L432 NwaCegarLoop]: 476 mSDtfsCounter, 1584 mSDsluCounter, 4706 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 5182 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-14 21:13:59,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 5182 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-14 21:13:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2024-10-14 21:13:59,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1534. [2024-10-14 21:13:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1205 states have (on average 1.8954356846473028) internal successors, (2284), 1467 states have internal predecessors, (2284), 49 states have call successors, (49), 15 states have call predecessors, (49), 23 states have return successors, (71), 51 states have call predecessors, (71), 49 states have call successors, (71) [2024-10-14 21:13:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2404 transitions. [2024-10-14 21:13:59,699 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2404 transitions. Word has length 23 [2024-10-14 21:13:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:13:59,699 INFO L471 AbstractCegarLoop]: Abstraction has 1534 states and 2404 transitions. [2024-10-14 21:13:59,699 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) [2024-10-14 21:13:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2404 transitions. [2024-10-14 21:13:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 21:13:59,701 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:13:59,701 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] [2024-10-14 21:13:59,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 21:13:59,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:59,907 INFO L396 AbstractCegarLoop]: === Iteration 11 === 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)] === [2024-10-14 21:13:59,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:13:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1472993905, now seen corresponding path program 1 times [2024-10-14 21:13:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:13:59,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442318139] [2024-10-14 21:13:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:59,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:13:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:13:59,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469290152] [2024-10-14 21:13:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:13:59,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:13:59,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:13:59,923 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) [2024-10-14 21:13:59,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 21:14:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:00,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-14 21:14:00,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:14:00,011 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 [2024-10-14 21:14:00,021 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 [2024-10-14 21:14:00,027 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 [2024-10-14 21:14:00,258 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 [2024-10-14 21:14:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:14:00,282 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 21:14:00,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:14:00,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442318139] [2024-10-14 21:14:00,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:14:00,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469290152] [2024-10-14 21:14:00,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469290152] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:14:00,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:14:00,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 21:14:00,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221880414] [2024-10-14 21:14:00,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:14:00,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 21:14:00,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:14:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 21:14:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-14 21:14:00,285 INFO L87 Difference]: Start difference. First operand 1534 states and 2404 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) [2024-10-14 21:14:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:14:01,102 INFO L93 Difference]: Finished difference Result 1807 states and 2468 transitions. [2024-10-14 21:14:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 21:14:01,102 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 [2024-10-14 21:14:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:14:01,111 INFO L225 Difference]: With dead ends: 1807 [2024-10-14 21:14:01,111 INFO L226 Difference]: Without dead ends: 1806 [2024-10-14 21:14:01,112 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 [2024-10-14 21:14:01,113 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, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 21:14:01,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 3791 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 21:14:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2024-10-14 21:14:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1534. [2024-10-14 21:14:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1205 states have (on average 1.8946058091286306) internal successors, (2283), 1467 states have internal predecessors, (2283), 49 states have call successors, (49), 15 states have call predecessors, (49), 23 states have return successors, (71), 51 states have call predecessors, (71), 49 states have call successors, (71) [2024-10-14 21:14:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2403 transitions. [2024-10-14 21:14:01,151 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2403 transitions. Word has length 25 [2024-10-14 21:14:01,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:14:01,151 INFO L471 AbstractCegarLoop]: Abstraction has 1534 states and 2403 transitions. [2024-10-14 21:14:01,151 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) [2024-10-14 21:14:01,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2403 transitions. [2024-10-14 21:14:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-14 21:14:01,153 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:14:01,153 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] [2024-10-14 21:14:01,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 21:14:01,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:14:01,358 INFO L396 AbstractCegarLoop]: === Iteration 12 === 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)] === [2024-10-14 21:14:01,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:14:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1581829146, now seen corresponding path program 1 times [2024-10-14 21:14:01,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:14:01,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079902988] [2024-10-14 21:14:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:01,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:14:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:14:01,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636812122] [2024-10-14 21:14:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:01,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:14:01,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:14:01,374 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) [2024-10-14 21:14:01,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 21:14:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:01,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-14 21:14:01,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:14:01,477 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 [2024-10-14 21:14:01,481 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 [2024-10-14 21:14:01,699 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 [2024-10-14 21:14:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:14:01,723 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 21:14:01,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:14:01,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079902988] [2024-10-14 21:14:01,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:14:01,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636812122] [2024-10-14 21:14:01,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636812122] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:14:01,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:14:01,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-14 21:14:01,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602005536] [2024-10-14 21:14:01,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:14:01,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 21:14:01,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:14:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 21:14:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-10-14 21:14:01,724 INFO L87 Difference]: Start difference. First operand 1534 states and 2403 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 21:14:02,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:14:02,793 INFO L93 Difference]: Finished difference Result 1806 states and 2467 transitions. [2024-10-14 21:14:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 21:14:02,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-10-14 21:14:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:14:02,799 INFO L225 Difference]: With dead ends: 1806 [2024-10-14 21:14:02,799 INFO L226 Difference]: Without dead ends: 1805 [2024-10-14 21:14:02,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2024-10-14 21:14:02,800 INFO L432 NwaCegarLoop]: 481 mSDtfsCounter, 1367 mSDsluCounter, 4844 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 5325 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-14 21:14:02,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1369 Valid, 5325 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-14 21:14:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2024-10-14 21:14:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1534. [2024-10-14 21:14:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1205 states have (on average 1.8937759336099584) internal successors, (2282), 1467 states have internal predecessors, (2282), 49 states have call successors, (49), 15 states have call predecessors, (49), 23 states have return successors, (71), 51 states have call predecessors, (71), 49 states have call successors, (71) [2024-10-14 21:14:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2402 transitions. [2024-10-14 21:14:02,833 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2402 transitions. Word has length 26 [2024-10-14 21:14:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:14:02,833 INFO L471 AbstractCegarLoop]: Abstraction has 1534 states and 2402 transitions. [2024-10-14 21:14:02,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 21:14:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2402 transitions. [2024-10-14 21:14:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 21:14:02,834 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:14:02,834 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] [2024-10-14 21:14:02,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 21:14:03,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-14 21:14:03,039 INFO L396 AbstractCegarLoop]: === Iteration 13 === 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)] === [2024-10-14 21:14:03,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:14:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1792063213, now seen corresponding path program 1 times [2024-10-14 21:14:03,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:14:03,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576344927] [2024-10-14 21:14:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:03,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:14:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:14:03,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194033658] [2024-10-14 21:14:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:03,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:14:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:14:03,054 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) [2024-10-14 21:14:03,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 21:14:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:03,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-10-14 21:14:03,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:14:03,143 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 [2024-10-14 21:14:03,146 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 11 [2024-10-14 21:14:03,150 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 [2024-10-14 21:14:03,152 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 [2024-10-14 21:14:03,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 21:14:03,483 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 [2024-10-14 21:14:03,586 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 [2024-10-14 21:14:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:14:03,632 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 21:14:03,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:14:03,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576344927] [2024-10-14 21:14:03,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:14:03,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194033658] [2024-10-14 21:14:03,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194033658] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:14:03,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:14:03,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-10-14 21:14:03,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566833214] [2024-10-14 21:14:03,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:14:03,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 21:14:03,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:14:03,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 21:14:03,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-14 21:14:03,633 INFO L87 Difference]: Start difference. First operand 1534 states and 2402 transitions. Second operand has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2024-10-14 21:14:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:14:05,407 INFO L93 Difference]: Finished difference Result 1805 states and 2466 transitions. [2024-10-14 21:14:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 21:14:05,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 [2024-10-14 21:14:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:14:05,415 INFO L225 Difference]: With dead ends: 1805 [2024-10-14 21:14:05,415 INFO L226 Difference]: Without dead ends: 1804 [2024-10-14 21:14:05,416 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-10-14 21:14:05,416 INFO L432 NwaCegarLoop]: 466 mSDtfsCounter, 1913 mSDsluCounter, 4973 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 5439 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-14 21:14:05,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1915 Valid, 5439 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-14 21:14:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2024-10-14 21:14:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1534. [2024-10-14 21:14:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1205 states have (on average 1.8929460580912862) internal successors, (2281), 1467 states have internal predecessors, (2281), 49 states have call successors, (49), 15 states have call predecessors, (49), 23 states have return successors, (71), 51 states have call predecessors, (71), 49 states have call successors, (71) [2024-10-14 21:14:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2401 transitions. [2024-10-14 21:14:05,449 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2401 transitions. Word has length 27 [2024-10-14 21:14:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:14:05,451 INFO L471 AbstractCegarLoop]: Abstraction has 1534 states and 2401 transitions. [2024-10-14 21:14:05,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2024-10-14 21:14:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2401 transitions. [2024-10-14 21:14:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 21:14:05,452 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:14:05,452 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] [2024-10-14 21:14:05,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 21:14:05,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-14 21:14:05,656 INFO L396 AbstractCegarLoop]: === Iteration 14 === 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)] === [2024-10-14 21:14:05,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:14:05,656 INFO L85 PathProgramCache]: Analyzing trace with hash 280615304, now seen corresponding path program 1 times [2024-10-14 21:14:05,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:14:05,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725302638] [2024-10-14 21:14:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:05,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:14:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:14:05,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493626699] [2024-10-14 21:14:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:05,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:14:05,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:14:05,676 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) [2024-10-14 21:14:05,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 21:14:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:05,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-14 21:14:05,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:14:05,814 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 [2024-10-14 21:14:05,822 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 [2024-10-14 21:14:05,828 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 [2024-10-14 21:14:05,832 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 [2024-10-14 21:14:05,926 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 [2024-10-14 21:14:05,930 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 19 treesize of output 11 [2024-10-14 21:14:06,083 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 [2024-10-14 21:14:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:14:06,099 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 21:14:06,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:14:06,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725302638] [2024-10-14 21:14:06,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:14:06,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493626699] [2024-10-14 21:14:06,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493626699] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:14:06,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:14:06,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-14 21:14:06,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425268964] [2024-10-14 21:14:06,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:14:06,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 21:14:06,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:14:06,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 21:14:06,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-14 21:14:06,101 INFO L87 Difference]: Start difference. First operand 1534 states and 2401 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 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) [2024-10-14 21:14:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:14:07,253 INFO L93 Difference]: Finished difference Result 1804 states and 2465 transitions. [2024-10-14 21:14:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 21:14:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 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 28 [2024-10-14 21:14:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:14:07,258 INFO L225 Difference]: With dead ends: 1804 [2024-10-14 21:14:07,258 INFO L226 Difference]: Without dead ends: 1803 [2024-10-14 21:14:07,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2024-10-14 21:14:07,259 INFO L432 NwaCegarLoop]: 470 mSDtfsCounter, 1557 mSDsluCounter, 4296 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 4766 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-14 21:14:07,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1559 Valid, 4766 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-14 21:14:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2024-10-14 21:14:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1534. [2024-10-14 21:14:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1205 states have (on average 1.892116182572614) internal successors, (2280), 1467 states have internal predecessors, (2280), 49 states have call successors, (49), 15 states have call predecessors, (49), 23 states have return successors, (71), 51 states have call predecessors, (71), 49 states have call successors, (71) [2024-10-14 21:14:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2400 transitions. [2024-10-14 21:14:07,294 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2400 transitions. Word has length 28 [2024-10-14 21:14:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:14:07,294 INFO L471 AbstractCegarLoop]: Abstraction has 1534 states and 2400 transitions. [2024-10-14 21:14:07,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 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) [2024-10-14 21:14:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2400 transitions. [2024-10-14 21:14:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-14 21:14:07,295 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:14:07,295 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:14:07,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 21:14:07,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 21:14:07,496 INFO L396 AbstractCegarLoop]: === Iteration 15 === 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)] === [2024-10-14 21:14:07,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:14:07,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1161185275, now seen corresponding path program 2 times [2024-10-14 21:14:07,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:14:07,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866036271] [2024-10-14 21:14:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:07,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:14:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:07,848 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 21:14:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:08,088 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 21:14:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:08,227 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-14 21:14:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 21:14:08,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:14:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866036271] [2024-10-14 21:14:08,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866036271] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:14:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408655350] [2024-10-14 21:14:08,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 21:14:08,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:14:08,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:14:08,280 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) [2024-10-14 21:14:08,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 21:14:08,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 21:14:08,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 21:14:08,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-10-14 21:14:08,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:14:08,396 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 [2024-10-14 21:14:08,400 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 [2024-10-14 21:14:08,681 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~#p~0#1.offset_BEFORE_CALL_19| Int)) (<= (select (select |c_#memory_int#3| |v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_19|) |v_ULTIMATE.start_main_~#p~0#1.offset_BEFORE_CALL_19|) 0)) (exists ((|v_func_to_recursive_line_28_to_32_0_#t~mem98_27| Int)) (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base|))) (and (<= |v_func_to_recursive_line_28_to_32_0_#t~mem98_27| (select .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset|)) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base| (store .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset| (* |v_func_to_recursive_line_28_to_32_0_#t~mem98_27| 4)))))))) is different from true [2024-10-14 21:14:08,718 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_28_to_32_0_#t~mem98_29| Int)) (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base|))) (and (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_func_to_recursive_line_28_to_32_0_#in~q.base| (store .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset| (* |v_func_to_recursive_line_28_to_32_0_#t~mem98_29| 4)))) (<= |v_func_to_recursive_line_28_to_32_0_#t~mem98_29| (* (select .cse0 |c_func_to_recursive_line_28_to_32_0_#in~q.offset|) 4))))) (exists ((|v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~#p~0#1.offset_BEFORE_CALL_19| Int)) (<= (select (select |c_#memory_int#3| |v_ULTIMATE.start_main_~#p~0#1.base_BEFORE_CALL_19|) |v_ULTIMATE.start_main_~#p~0#1.offset_BEFORE_CALL_19|) 0))) is different from true [2024-10-14 21:14:08,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 21:14:08,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 21:14:08,910 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 [2024-10-14 21:14:08,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-14 21:14:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 6 not checked. [2024-10-14 21:14:09,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:14:09,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408655350] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:14:09,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 21:14:09,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 29 [2024-10-14 21:14:09,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901879362] [2024-10-14 21:14:09,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 21:14:09,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-14 21:14:09,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:14:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-14 21:14:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1200, Unknown=2, NotChecked=142, Total=1482 [2024-10-14 21:14:09,520 INFO L87 Difference]: Start difference. First operand 1534 states and 2400 transitions. Second operand has 31 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 26 states have internal predecessors, (39), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 21:14:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:14:12,862 INFO L93 Difference]: Finished difference Result 2139 states and 2634 transitions. [2024-10-14 21:14:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-14 21:14:12,863 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 26 states have internal predecessors, (39), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2024-10-14 21:14:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:14:12,868 INFO L225 Difference]: With dead ends: 2139 [2024-10-14 21:14:12,868 INFO L226 Difference]: Without dead ends: 2138 [2024-10-14 21:14:12,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=2517, Unknown=2, NotChecked=210, Total=3080 [2024-10-14 21:14:12,869 INFO L432 NwaCegarLoop]: 962 mSDtfsCounter, 3136 mSDsluCounter, 14932 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3142 SdHoareTripleChecker+Valid, 15894 SdHoareTripleChecker+Invalid, 6266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3276 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-10-14 21:14:12,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3142 Valid, 15894 Invalid, 6266 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 2894 Invalid, 0 Unknown, 3276 Unchecked, 2.6s Time] [2024-10-14 21:14:12,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2024-10-14 21:14:12,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1340. [2024-10-14 21:14:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1019 states have (on average 1.886162904808636) internal successors, (1922), 1281 states have internal predecessors, (1922), 42 states have call successors, (42), 14 states have call predecessors, (42), 22 states have return successors, (63), 44 states have call predecessors, (63), 42 states have call successors, (63) [2024-10-14 21:14:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2027 transitions. [2024-10-14 21:14:12,904 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2027 transitions. Word has length 30 [2024-10-14 21:14:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:14:12,904 INFO L471 AbstractCegarLoop]: Abstraction has 1340 states and 2027 transitions. [2024-10-14 21:14:12,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 26 states have internal predecessors, (39), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 21:14:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2027 transitions. [2024-10-14 21:14:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 21:14:12,905 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:14:12,905 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1] [2024-10-14 21:14:12,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-14 21:14:13,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 21:14:13,106 INFO L396 AbstractCegarLoop]: === Iteration 16 === 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)] === [2024-10-14 21:14:13,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:14:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1413900189, now seen corresponding path program 2 times [2024-10-14 21:14:13,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:14:13,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068202292] [2024-10-14 21:14:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:13,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:14:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:14:13,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:14:13,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068202292] [2024-10-14 21:14:13,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068202292] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:14:13,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356048016] [2024-10-14 21:14:13,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 21:14:13,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:14:13,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:14:13,607 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) [2024-10-14 21:14:13,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 21:14:13,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 21:14:13,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 21:14:13,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-10-14 21:14:13,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:14:13,713 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 [2024-10-14 21:14:13,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 21:14:13,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-10-14 21:14:13,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-10-14 21:14:13,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-10-14 21:14:14,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-14 21:14:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:14:14,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:14:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 21:14:14,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356048016] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 21:14:14,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 21:14:14,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 49 [2024-10-14 21:14:14,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940559946] [2024-10-14 21:14:14,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 21:14:14,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-14 21:14:14,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:14:14,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-14 21:14:14,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2113, Unknown=0, NotChecked=0, Total=2550 [2024-10-14 21:14:14,282 INFO L87 Difference]: Start difference. First operand 1340 states and 2027 transitions. Second operand has 51 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 36 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 21:14:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:14:15,091 INFO L93 Difference]: Finished difference Result 1401 states and 2111 transitions. [2024-10-14 21:14:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-14 21:14:15,091 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 36 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-14 21:14:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:14:15,095 INFO L225 Difference]: With dead ends: 1401 [2024-10-14 21:14:15,095 INFO L226 Difference]: Without dead ends: 1400 [2024-10-14 21:14:15,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1131, Invalid=4721, Unknown=0, NotChecked=0, Total=5852 [2024-10-14 21:14:15,098 INFO L432 NwaCegarLoop]: 557 mSDtfsCounter, 266 mSDsluCounter, 3761 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 4318 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 21:14:15,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 4318 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 21:14:15,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2024-10-14 21:14:15,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2024-10-14 21:14:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1061 states have (on average 1.8567389255419415) internal successors, (1970), 1329 states have internal predecessors, (1970), 48 states have call successors, (48), 20 states have call predecessors, (48), 34 states have return successors, (87), 50 states have call predecessors, (87), 48 states have call successors, (87) [2024-10-14 21:14:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 2105 transitions. [2024-10-14 21:14:15,143 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 2105 transitions. Word has length 31 [2024-10-14 21:14:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:14:15,144 INFO L471 AbstractCegarLoop]: Abstraction has 1400 states and 2105 transitions. [2024-10-14 21:14:15,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 36 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 21:14:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 2105 transitions. [2024-10-14 21:14:15,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 21:14:15,149 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:14:15,149 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:14:15,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 21:14:15,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 21:14:15,350 INFO L396 AbstractCegarLoop]: === Iteration 17 === 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)] === [2024-10-14 21:14:15,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:14:15,350 INFO L85 PathProgramCache]: Analyzing trace with hash -526936954, now seen corresponding path program 1 times [2024-10-14 21:14:15,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:14:15,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49652745] [2024-10-14 21:14:15,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:15,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:14:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:14:15,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057402285] [2024-10-14 21:14:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:15,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:14:15,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:14:15,389 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 21:14:15,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 21:14:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:15,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-14 21:14:15,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:14:15,496 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 [2024-10-14 21:14:15,505 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 [2024-10-14 21:14:15,508 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 [2024-10-14 21:14:15,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 21:14:15,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 21:14:15,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 21:14:15,852 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 [2024-10-14 21:14:16,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-10-14 21:14:16,221 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 [2024-10-14 21:14:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 21:14:16,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:14:16,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:14:16,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49652745] [2024-10-14 21:14:16,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:14:16,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057402285] [2024-10-14 21:14:16,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057402285] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:14:16,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 21:14:16,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-14 21:14:16,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735270402] [2024-10-14 21:14:16,367 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 21:14:16,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 21:14:16,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:14:16,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 21:14:16,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-10-14 21:14:16,368 INFO L87 Difference]: Start difference. First operand 1400 states and 2105 transitions. Second operand has 13 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 21:14:21,604 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] [2024-10-14 21:14:25,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-14 21:14:29,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-14 21:14:29,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:14:29,933 INFO L93 Difference]: Finished difference Result 2085 states and 2635 transitions. [2024-10-14 21:14:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 21:14:29,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2024-10-14 21:14:29,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:14:29,943 INFO L225 Difference]: With dead ends: 2085 [2024-10-14 21:14:29,943 INFO L226 Difference]: Without dead ends: 2084 [2024-10-14 21:14:29,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-10-14 21:14:29,945 INFO L432 NwaCegarLoop]: 956 mSDtfsCounter, 1356 mSDsluCounter, 5849 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 6805 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2024-10-14 21:14:29,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1364 Valid, 6805 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1193 Invalid, 3 Unknown, 0 Unchecked, 13.4s Time] [2024-10-14 21:14:29,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2024-10-14 21:14:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1642. [2024-10-14 21:14:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1292 states have (on average 1.8660990712074303) internal successors, (2411), 1560 states have internal predecessors, (2411), 57 states have call successors, (57), 22 states have call predecessors, (57), 36 states have return successors, (98), 59 states have call predecessors, (98), 57 states have call successors, (98) [2024-10-14 21:14:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2566 transitions. [2024-10-14 21:14:30,063 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2566 transitions. Word has length 31 [2024-10-14 21:14:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:14:30,065 INFO L471 AbstractCegarLoop]: Abstraction has 1642 states and 2566 transitions. [2024-10-14 21:14:30,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 21:14:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2566 transitions. [2024-10-14 21:14:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-14 21:14:30,066 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:14:30,066 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:14:30,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 21:14:30,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 21:14:30,267 INFO L396 AbstractCegarLoop]: === Iteration 18 === 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)] === [2024-10-14 21:14:30,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:14:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 844823661, now seen corresponding path program 1 times [2024-10-14 21:14:30,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:14:30,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995240109] [2024-10-14 21:14:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:30,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:14:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:14:30,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944369228] [2024-10-14 21:14:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:30,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:14:30,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:14:30,327 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 21:14:30,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 21:14:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:30,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-10-14 21:14:30,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:14:30,461 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 [2024-10-14 21:14:30,463 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 [2024-10-14 21:14:30,469 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 [2024-10-14 21:14:30,473 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 [2024-10-14 21:14:30,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 21:14:30,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 21:14:30,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 21:14:30,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2024-10-14 21:14:31,231 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 [2024-10-14 21:14:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 21:14:31,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:14:31,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:14:31,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995240109] [2024-10-14 21:14:31,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:14:31,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944369228] [2024-10-14 21:14:31,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944369228] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:14:31,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 21:14:31,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-14 21:14:31,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239311168] [2024-10-14 21:14:31,654 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 21:14:31,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 21:14:31,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:14:31,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 21:14:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2024-10-14 21:14:31,655 INFO L87 Difference]: Start difference. First operand 1642 states and 2566 transitions. Second operand has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 21:14:36,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 21:14:40,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 21:14:44,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-14 21:14:49,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-14 21:14:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:14:50,164 INFO L93 Difference]: Finished difference Result 2084 states and 2634 transitions. [2024-10-14 21:14:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 21:14:50,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2024-10-14 21:14:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:14:50,168 INFO L225 Difference]: With dead ends: 2084 [2024-10-14 21:14:50,169 INFO L226 Difference]: Without dead ends: 2083 [2024-10-14 21:14:50,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-10-14 21:14:50,175 INFO L432 NwaCegarLoop]: 930 mSDtfsCounter, 1576 mSDsluCounter, 7433 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 35 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1584 SdHoareTripleChecker+Valid, 8363 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2024-10-14 21:14:50,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1584 Valid, 8363 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1862 Invalid, 4 Unknown, 0 Unchecked, 18.2s Time] [2024-10-14 21:14:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2024-10-14 21:14:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1642. [2024-10-14 21:14:50,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1292 states have (on average 1.8653250773993808) internal successors, (2410), 1560 states have internal predecessors, (2410), 57 states have call successors, (57), 22 states have call predecessors, (57), 36 states have return successors, (98), 59 states have call predecessors, (98), 57 states have call successors, (98) [2024-10-14 21:14:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2565 transitions. [2024-10-14 21:14:50,233 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2565 transitions. Word has length 32 [2024-10-14 21:14:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:14:50,234 INFO L471 AbstractCegarLoop]: Abstraction has 1642 states and 2565 transitions. [2024-10-14 21:14:50,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 21:14:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2565 transitions. [2024-10-14 21:14:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-14 21:14:50,234 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:14:50,234 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:14:50,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-14 21:14:50,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:14:50,435 INFO L396 AbstractCegarLoop]: === Iteration 19 === 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)] === [2024-10-14 21:14:50,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:14:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash 419729768, now seen corresponding path program 1 times [2024-10-14 21:14:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:14:50,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489006220] [2024-10-14 21:14:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:50,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:14:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:14:50,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471210182] [2024-10-14 21:14:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:14:50,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:14:50,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:14:50,450 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 21:14:50,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 21:14:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:14:50,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-10-14 21:14:50,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:14:50,561 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 [2024-10-14 21:14:50,564 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 [2024-10-14 21:14:50,567 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 [2024-10-14 21:14:50,569 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 [2024-10-14 21:14:50,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 21:14:50,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 21:14:50,815 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 [2024-10-14 21:14:50,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 21:14:51,046 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 [2024-10-14 21:14:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 21:14:51,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:14:59,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:14:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489006220] [2024-10-14 21:14:59,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:14:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471210182] [2024-10-14 21:14:59,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471210182] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:14:59,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 21:14:59,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-10-14 21:14:59,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866689445] [2024-10-14 21:14:59,490 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 21:14:59,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 21:14:59,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:14:59,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 21:14:59,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=230, Unknown=2, NotChecked=0, Total=272 [2024-10-14 21:14:59,491 INFO L87 Difference]: Start difference. First operand 1642 states and 2565 transitions. Second operand has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 21:15:03,828 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] [2024-10-14 21:15:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:15:06,140 INFO L93 Difference]: Finished difference Result 2083 states and 2633 transitions. [2024-10-14 21:15:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 21:15:06,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2024-10-14 21:15:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:15:06,144 INFO L225 Difference]: With dead ends: 2083 [2024-10-14 21:15:06,144 INFO L226 Difference]: Without dead ends: 2082 [2024-10-14 21:15:06,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=77, Invalid=383, Unknown=2, NotChecked=0, Total=462 [2024-10-14 21:15:06,145 INFO L432 NwaCegarLoop]: 929 mSDtfsCounter, 1228 mSDsluCounter, 8573 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 9502 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-10-14 21:15:06,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 9502 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2104 Invalid, 3 Unknown, 0 Unchecked, 6.4s Time] [2024-10-14 21:15:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2024-10-14 21:15:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1642. [2024-10-14 21:15:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1292 states have (on average 1.8645510835913313) internal successors, (2409), 1560 states have internal predecessors, (2409), 57 states have call successors, (57), 22 states have call predecessors, (57), 36 states have return successors, (98), 59 states have call predecessors, (98), 57 states have call successors, (98) [2024-10-14 21:15:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2564 transitions. [2024-10-14 21:15:06,212 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2564 transitions. Word has length 33 [2024-10-14 21:15:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:15:06,212 INFO L471 AbstractCegarLoop]: Abstraction has 1642 states and 2564 transitions. [2024-10-14 21:15:06,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 21:15:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2564 transitions. [2024-10-14 21:15:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-14 21:15:06,212 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:15:06,212 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:15:06,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-14 21:15:06,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:15:06,413 INFO L396 AbstractCegarLoop]: === Iteration 20 === 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)] === [2024-10-14 21:15:06,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:15:06,413 INFO L85 PathProgramCache]: Analyzing trace with hash 126720975, now seen corresponding path program 1 times [2024-10-14 21:15:06,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:15:06,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833289830] [2024-10-14 21:15:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:15:06,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:15:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:15:06,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598281305] [2024-10-14 21:15:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:15:06,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:15:06,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:15:06,441 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 21:15:06,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 21:15:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:15:06,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 21:15:06,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:15:06,558 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 [2024-10-14 21:15:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 21:15:06,796 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 21:15:06,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:15:06,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833289830] [2024-10-14 21:15:06,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:15:06,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598281305] [2024-10-14 21:15:06,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598281305] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:15:06,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:15:06,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 21:15:06,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154058844] [2024-10-14 21:15:06,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:15:06,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 21:15:06,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:15:06,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 21:15:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 21:15:06,798 INFO L87 Difference]: Start difference. First operand 1642 states and 2564 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 21:15:07,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:15:07,501 INFO L93 Difference]: Finished difference Result 1927 states and 2636 transitions. [2024-10-14 21:15:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 21:15:07,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2024-10-14 21:15:07,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:15:07,509 INFO L225 Difference]: With dead ends: 1927 [2024-10-14 21:15:07,512 INFO L226 Difference]: Without dead ends: 1926 [2024-10-14 21:15:07,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-10-14 21:15:07,514 INFO L432 NwaCegarLoop]: 523 mSDtfsCounter, 1022 mSDsluCounter, 2962 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 3485 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 21:15:07,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 3485 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 21:15:07,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2024-10-14 21:15:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1642. [2024-10-14 21:15:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1292 states have (on average 1.8622291021671826) internal successors, (2406), 1560 states have internal predecessors, (2406), 57 states have call successors, (57), 22 states have call predecessors, (57), 36 states have return successors, (98), 59 states have call predecessors, (98), 57 states have call successors, (98) [2024-10-14 21:15:07,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2561 transitions. [2024-10-14 21:15:07,604 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2561 transitions. Word has length 34 [2024-10-14 21:15:07,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:15:07,604 INFO L471 AbstractCegarLoop]: Abstraction has 1642 states and 2561 transitions. [2024-10-14 21:15:07,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 21:15:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2561 transitions. [2024-10-14 21:15:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 21:15:07,605 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:15:07,605 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:15:07,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-14 21:15:07,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:15:07,806 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting func_to_recursive_line_36_to_52_0Err12ASSERT_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)] === [2024-10-14 21:15:07,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:15:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2144507506, now seen corresponding path program 1 times [2024-10-14 21:15:07,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:15:07,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419940328] [2024-10-14 21:15:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:15:07,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:15:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:15:07,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561948466] [2024-10-14 21:15:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:15:07,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:15:07,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:15:07,824 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 21:15:07,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 21:15:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:15:07,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 21:15:07,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:15:07,933 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 [2024-10-14 21:15:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 21:15:08,035 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 21:15:08,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:15:08,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419940328] [2024-10-14 21:15:08,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:15:08,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561948466] [2024-10-14 21:15:08,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561948466] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 21:15:08,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 21:15:08,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 21:15:08,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641716836] [2024-10-14 21:15:08,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 21:15:08,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 21:15:08,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:15:08,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 21:15:08,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-14 21:15:08,037 INFO L87 Difference]: Start difference. First operand 1642 states and 2561 transitions. Second operand has 7 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 21:15:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:15:08,394 INFO L93 Difference]: Finished difference Result 1922 states and 2629 transitions. [2024-10-14 21:15:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 21:15:08,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-10-14 21:15:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:15:08,397 INFO L225 Difference]: With dead ends: 1922 [2024-10-14 21:15:08,398 INFO L226 Difference]: Without dead ends: 1918 [2024-10-14 21:15:08,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-14 21:15:08,399 INFO L432 NwaCegarLoop]: 506 mSDtfsCounter, 939 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 3072 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 21:15:08,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 3072 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 21:15:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2024-10-14 21:15:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1642. [2024-10-14 21:15:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1292 states have (on average 1.8498452012383901) internal successors, (2390), 1560 states have internal predecessors, (2390), 57 states have call successors, (57), 22 states have call predecessors, (57), 36 states have return successors, (98), 59 states have call predecessors, (98), 57 states have call successors, (98) [2024-10-14 21:15:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2545 transitions. [2024-10-14 21:15:08,452 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2545 transitions. Word has length 35 [2024-10-14 21:15:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:15:08,452 INFO L471 AbstractCegarLoop]: Abstraction has 1642 states and 2545 transitions. [2024-10-14 21:15:08,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 21:15:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2545 transitions. [2024-10-14 21:15:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 21:15:08,453 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:15:08,453 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:15:08,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-14 21:15:08,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:15:08,658 INFO L396 AbstractCegarLoop]: === Iteration 22 === 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)] === [2024-10-14 21:15:08,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:15:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash -366617014, now seen corresponding path program 1 times [2024-10-14 21:15:08,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:15:08,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683379863] [2024-10-14 21:15:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:15:08,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:15:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:15:08,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164155359] [2024-10-14 21:15:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:15:08,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:15:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:15:08,679 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 21:15:08,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 21:15:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:15:08,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-14 21:15:08,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:15:08,861 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 [2024-10-14 21:15:08,866 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 [2024-10-14 21:15:08,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 21:15:09,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 21:15:09,438 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 [2024-10-14 21:15:09,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-10-14 21:15:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 21:15:09,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:15:09,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 21:15:09,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683379863] [2024-10-14 21:15:09,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 21:15:09,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164155359] [2024-10-14 21:15:09,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164155359] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 21:15:09,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 21:15:09,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-14 21:15:09,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032601672] [2024-10-14 21:15:09,668 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 21:15:09,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 21:15:09,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 21:15:09,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 21:15:09,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-10-14 21:15:09,671 INFO L87 Difference]: Start difference. First operand 1642 states and 2545 transitions. Second operand has 13 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 21:15:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 21:15:11,154 INFO L93 Difference]: Finished difference Result 2010 states and 2669 transitions. [2024-10-14 21:15:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 21:15:11,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2024-10-14 21:15:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 21:15:11,162 INFO L225 Difference]: With dead ends: 2010 [2024-10-14 21:15:11,166 INFO L226 Difference]: Without dead ends: 2009 [2024-10-14 21:15:11,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-10-14 21:15:11,168 INFO L432 NwaCegarLoop]: 972 mSDtfsCounter, 1692 mSDsluCounter, 6837 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 7809 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-14 21:15:11,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1702 Valid, 7809 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1131 Invalid, 1 Unknown, 0 Unchecked, 1.2s Time] [2024-10-14 21:15:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2024-10-14 21:15:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1642. [2024-10-14 21:15:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1292 states have (on average 1.8490712074303406) internal successors, (2389), 1560 states have internal predecessors, (2389), 57 states have call successors, (57), 22 states have call predecessors, (57), 36 states have return successors, (98), 59 states have call predecessors, (98), 57 states have call successors, (98) [2024-10-14 21:15:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2544 transitions. [2024-10-14 21:15:11,283 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2544 transitions. Word has length 35 [2024-10-14 21:15:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 21:15:11,283 INFO L471 AbstractCegarLoop]: Abstraction has 1642 states and 2544 transitions. [2024-10-14 21:15:11,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 21:15:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2544 transitions. [2024-10-14 21:15:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-14 21:15:11,284 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 21:15:11,284 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 21:15:11,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-14 21:15:11,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:15:11,488 INFO L396 AbstractCegarLoop]: === Iteration 23 === 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)] === [2024-10-14 21:15:11,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 21:15:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1519774513, now seen corresponding path program 1 times [2024-10-14 21:15:11,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 21:15:11,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333245149] [2024-10-14 21:15:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:15:11,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 21:15:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 21:15:11,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537509381] [2024-10-14 21:15:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 21:15:11,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 21:15:11,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 21:15:11,524 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 21:15:11,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-14 21:15:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 21:15:11,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-14 21:15:11,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 21:15:11,641 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 [2024-10-14 21:15:11,643 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 [2024-10-14 21:15:11,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 21:15:11,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 21:15:12,139 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 [2024-10-14 21:15:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 21:15:12,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 21:15:14,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28