./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9dfd2bf12e8d041fe6d1d6bf651e6b1ba93f167a26b0485680374a443f598c5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:28:23,870 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:28:23,920 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:28:23,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:28:23,924 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:28:23,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:28:23,964 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:28:23,972 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:28:23,973 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:28:23,973 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:28:23,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:28:23,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:28:23,975 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:28:23,977 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:28:23,979 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:28:23,980 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:28:23,980 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:28:23,980 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:28:23,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:28:23,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:28:23,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:28:23,981 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:28:23,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:28:23,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:28:23,982 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:28:23,982 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:28:23,982 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:28:23,982 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:28:23,983 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:28:23,983 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:28:23,985 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:28:23,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:28:23,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:28:23,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:28:23,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:28:23,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:28:23,986 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:28:23,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:28:23,986 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:28:23,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:28:23,987 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:28:23,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:28:23,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9dfd2bf12e8d041fe6d1d6bf651e6b1ba93f167a26b0485680374a443f598c5 [2024-11-18 14:28:24,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:28:24,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:28:24,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:28:24,262 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:28:24,263 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:28:24,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c [2024-11-18 14:28:25,637 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:28:25,787 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:28:25,788 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c [2024-11-18 14:28:25,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5a53ce6/9a70c13b83cc47b5a0012fb57877dd37/FLAG90f81f880 [2024-11-18 14:28:25,805 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5a53ce6/9a70c13b83cc47b5a0012fb57877dd37 [2024-11-18 14:28:25,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:28:25,808 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:28:25,809 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:28:25,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:28:25,817 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:28:25,818 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:28:25" (1/1) ... [2024-11-18 14:28:25,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6dd464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:25, skipping insertion in model container [2024-11-18 14:28:25,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:28:25" (1/1) ... [2024-11-18 14:28:25,836 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:28:25,964 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c[2721,2734] [2024-11-18 14:28:25,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:28:25,975 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:28:25,991 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_5.c[2721,2734] [2024-11-18 14:28:25,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:28:26,004 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:28:26,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26 WrapperNode [2024-11-18 14:28:26,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:28:26,006 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:28:26,006 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:28:26,006 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:28:26,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,030 INFO L138 Inliner]: procedures = 16, calls = 62, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2024-11-18 14:28:26,030 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:28:26,031 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:28:26,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:28:26,031 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:28:26,038 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,041 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,053 INFO L175 MemorySlicer]: Split 32 memory accesses to 6 slices as follows [6, 2, 6, 6, 6, 6]. 19 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [1, 2, 1, 1, 1, 1]. The 10 writes are split as follows [2, 0, 2, 2, 2, 2]. [2024-11-18 14:28:26,054 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,059 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,061 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,062 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,063 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,066 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:28:26,067 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:28:26,067 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:28:26,067 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:28:26,068 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:28:26,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:26,107 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) [2024-11-18 14:28:26,111 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 [2024-11-18 14:28:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:28:26,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:28:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 14:28:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-18 14:28:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-18 14:28:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-18 14:28:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-18 14:28:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 14:28:26,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 14:28:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 14:28:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-18 14:28:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-18 14:28:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-18 14:28:26,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-18 14:28:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_24_to_25_0 [2024-11-18 14:28:26,153 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_24_to_25_0 [2024-11-18 14:28:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_24_0 [2024-11-18 14:28:26,153 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_24_0 [2024-11-18 14:28:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_26_0 [2024-11-18 14:28:26,153 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_26_0 [2024-11-18 14:28:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:28:26,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:28:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 14:28:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 14:28:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-18 14:28:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-18 14:28:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-18 14:28:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-18 14:28:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_27_0 [2024-11-18 14:28:26,154 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_27_0 [2024-11-18 14:28:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_27_0 [2024-11-18 14:28:26,155 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_27_0 [2024-11-18 14:28:26,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 14:28:26,261 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:28:26,263 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:28:26,451 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-18 14:28:26,451 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:28:26,462 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:28:26,462 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-18 14:28:26,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:28:26 BoogieIcfgContainer [2024-11-18 14:28:26,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:28:26,464 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:28:26,464 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:28:26,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:28:26,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:28:25" (1/3) ... [2024-11-18 14:28:26,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2d0fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:28:26, skipping insertion in model container [2024-11-18 14:28:26,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (2/3) ... [2024-11-18 14:28:26,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2d0fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:28:26, skipping insertion in model container [2024-11-18 14:28:26,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:28:26" (3/3) ... [2024-11-18 14:28:26,469 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_5.c [2024-11-18 14:28:26,488 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:28:26,488 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:28:26,539 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:28:26,545 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;@129b315e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:28:26,545 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:28:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-18 14:28:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-18 14:28:26,559 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:26,560 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:26,560 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:26,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1772465061, now seen corresponding path program 1 times [2024-11-18 14:28:26,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:26,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369631897] [2024-11-18 14:28:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:26,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:28:27,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:27,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369631897] [2024-11-18 14:28:27,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369631897] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:27,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:27,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 14:28:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640101905] [2024-11-18 14:28:27,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:27,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 14:28:27,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:27,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 14:28:27,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:28:27,184 INFO L87 Difference]: Start difference. First operand has 51 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:28:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:27,387 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2024-11-18 14:28:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:28:27,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-18 14:28:27,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:27,396 INFO L225 Difference]: With dead ends: 68 [2024-11-18 14:28:27,396 INFO L226 Difference]: Without dead ends: 49 [2024-11-18 14:28:27,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:28:27,402 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:27,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 83 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:28:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-18 14:28:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-18 14:28:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-18 14:28:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2024-11-18 14:28:27,439 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 17 [2024-11-18 14:28:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:27,439 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2024-11-18 14:28:27,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:28:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2024-11-18 14:28:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-18 14:28:27,441 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:27,442 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-18 14:28:27,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 14:28:27,442 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:27,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:27,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1896614561, now seen corresponding path program 1 times [2024-11-18 14:28:27,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:27,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944551408] [2024-11-18 14:28:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:27,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 14:28:27,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:27,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944551408] [2024-11-18 14:28:27,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944551408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:27,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:27,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 14:28:27,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779543730] [2024-11-18 14:28:27,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:27,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 14:28:27,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:27,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 14:28:27,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:28:27,629 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 14:28:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:27,769 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2024-11-18 14:28:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:28:27,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2024-11-18 14:28:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:27,772 INFO L225 Difference]: With dead ends: 97 [2024-11-18 14:28:27,772 INFO L226 Difference]: Without dead ends: 51 [2024-11-18 14:28:27,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:28:27,773 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:27,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 94 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-18 14:28:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-18 14:28:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2024-11-18 14:28:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2024-11-18 14:28:27,789 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 28 [2024-11-18 14:28:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:27,790 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2024-11-18 14:28:27,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 14:28:27,790 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2024-11-18 14:28:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-18 14:28:27,793 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:27,793 INFO L215 NwaCegarLoop]: trace histogram [2, 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, 1] [2024-11-18 14:28:27,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 14:28:27,793 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:27,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash 659087250, now seen corresponding path program 1 times [2024-11-18 14:28:27,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:27,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714839830] [2024-11-18 14:28:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:27,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 14:28:28,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:28,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714839830] [2024-11-18 14:28:28,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714839830] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:28,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:28,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 14:28:28,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828638778] [2024-11-18 14:28:28,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:28,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 14:28:28,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 14:28:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:28:28,044 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:28:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:28,165 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2024-11-18 14:28:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:28:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2024-11-18 14:28:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:28,167 INFO L225 Difference]: With dead ends: 101 [2024-11-18 14:28:28,167 INFO L226 Difference]: Without dead ends: 53 [2024-11-18 14:28:28,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:28:28,168 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:28,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 140 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:28,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-18 14:28:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-18 14:28:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 39 states have internal predecessors, (43), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-18 14:28:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-11-18 14:28:28,181 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 39 [2024-11-18 14:28:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:28,182 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-11-18 14:28:28,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:28:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-11-18 14:28:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-18 14:28:28,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:28,184 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:28,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 14:28:28,184 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:28,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:28,188 INFO L85 PathProgramCache]: Analyzing trace with hash -263259713, now seen corresponding path program 1 times [2024-11-18 14:28:28,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:28,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082690465] [2024-11-18 14:28:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:28,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-18 14:28:28,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:28,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082690465] [2024-11-18 14:28:28,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082690465] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:28,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:28,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 14:28:28,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388977580] [2024-11-18 14:28:28,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:28,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 14:28:28,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:28,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 14:28:28,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:28:28,351 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 14:28:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:28,436 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2024-11-18 14:28:28,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:28:28,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2024-11-18 14:28:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:28,437 INFO L225 Difference]: With dead ends: 105 [2024-11-18 14:28:28,437 INFO L226 Difference]: Without dead ends: 55 [2024-11-18 14:28:28,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:28:28,439 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 18 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:28,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 168 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-18 14:28:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-18 14:28:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 states have internal predecessors, (44), 10 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-18 14:28:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-11-18 14:28:28,445 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 50 [2024-11-18 14:28:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:28,445 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-11-18 14:28:28,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-18 14:28:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-11-18 14:28:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-18 14:28:28,446 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:28,446 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:28,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-18 14:28:28,447 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:28,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:28,447 INFO L85 PathProgramCache]: Analyzing trace with hash -889035351, now seen corresponding path program 1 times [2024-11-18 14:28:28,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:28,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116742047] [2024-11-18 14:28:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 14:28:28,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:28,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116742047] [2024-11-18 14:28:28,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116742047] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:28,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:28,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 14:28:28,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680673986] [2024-11-18 14:28:28,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:28,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 14:28:28,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:28,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 14:28:28,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:28:28,605 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-18 14:28:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:28,672 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2024-11-18 14:28:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:28:28,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2024-11-18 14:28:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:28,673 INFO L225 Difference]: With dead ends: 109 [2024-11-18 14:28:28,673 INFO L226 Difference]: Without dead ends: 57 [2024-11-18 14:28:28,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:28:28,674 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 16 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:28,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 174 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-18 14:28:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-18 14:28:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.25) internal successors, (45), 41 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-18 14:28:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-11-18 14:28:28,680 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 61 [2024-11-18 14:28:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:28,681 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-11-18 14:28:28,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 1 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-18 14:28:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-11-18 14:28:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-18 14:28:28,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:28,682 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:28,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-18 14:28:28,682 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:28,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:28,683 INFO L85 PathProgramCache]: Analyzing trace with hash -873526421, now seen corresponding path program 1 times [2024-11-18 14:28:28,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:28,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937596069] [2024-11-18 14:28:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:28,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 14:28:29,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:29,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937596069] [2024-11-18 14:28:29,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937596069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:29,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811390369] [2024-11-18 14:28:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:29,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:29,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:29,047 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) [2024-11-18 14:28:29,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 14:28:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:29,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-18 14:28:29,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:29,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 14:28:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 14:28:29,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 14:28:29,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811390369] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:29,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:29,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 24 [2024-11-18 14:28:29,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66433757] [2024-11-18 14:28:29,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:29,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-18 14:28:29,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:29,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-18 14:28:29,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2024-11-18 14:28:29,975 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 24 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 20 states have internal predecessors, (68), 10 states have call successors, (21), 6 states have call predecessors, (21), 8 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2024-11-18 14:28:30,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:30,488 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2024-11-18 14:28:30,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-18 14:28:30,488 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 20 states have internal predecessors, (68), 10 states have call successors, (21), 6 states have call predecessors, (21), 8 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) Word has length 66 [2024-11-18 14:28:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:30,489 INFO L225 Difference]: With dead ends: 115 [2024-11-18 14:28:30,489 INFO L226 Difference]: Without dead ends: 61 [2024-11-18 14:28:30,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2024-11-18 14:28:30,491 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 43 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:30,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 506 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:28:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-18 14:28:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-18 14:28:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.236842105263158) internal successors, (47), 43 states have internal predecessors, (47), 10 states have call successors, (10), 5 states have call predecessors, (10), 12 states have return successors, (17), 12 states have call predecessors, (17), 10 states have call successors, (17) [2024-11-18 14:28:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2024-11-18 14:28:30,510 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 66 [2024-11-18 14:28:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:30,510 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2024-11-18 14:28:30,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 20 states have internal predecessors, (68), 10 states have call successors, (21), 6 states have call predecessors, (21), 8 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2024-11-18 14:28:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2024-11-18 14:28:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-18 14:28:30,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:30,512 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-18 14:28:30,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 14:28:30,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-18 14:28:30,713 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:30,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash 361736368, now seen corresponding path program 2 times [2024-11-18 14:28:30,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:30,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975240281] [2024-11-18 14:28:30,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:28:30,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:30,758 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:28:30,758 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-18 14:28:31,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:31,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975240281] [2024-11-18 14:28:31,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975240281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:31,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708129308] [2024-11-18 14:28:31,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:28:31,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:31,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:31,195 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) [2024-11-18 14:28:31,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 14:28:31,358 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:28:31,358 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:31,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-18 14:28:31,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:31,375 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 [2024-11-18 14:28:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-18 14:28:31,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-18 14:28:32,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708129308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:32,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:32,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 24 [2024-11-18 14:28:32,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261542206] [2024-11-18 14:28:32,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:32,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-18 14:28:32,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:32,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-18 14:28:32,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2024-11-18 14:28:32,076 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 24 states, 18 states have (on average 3.611111111111111) internal successors, (65), 20 states have internal predecessors, (65), 11 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-18 14:28:32,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:32,540 INFO L93 Difference]: Finished difference Result 123 states and 157 transitions. [2024-11-18 14:28:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 14:28:32,541 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 3.611111111111111) internal successors, (65), 20 states have internal predecessors, (65), 11 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 103 [2024-11-18 14:28:32,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:32,542 INFO L225 Difference]: With dead ends: 123 [2024-11-18 14:28:32,542 INFO L226 Difference]: Without dead ends: 65 [2024-11-18 14:28:32,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2024-11-18 14:28:32,543 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:32,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 229 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:28:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-18 14:28:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-18 14:28:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.225) internal successors, (49), 45 states have internal predecessors, (49), 10 states have call successors, (10), 5 states have call predecessors, (10), 14 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2024-11-18 14:28:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-11-18 14:28:32,550 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 103 [2024-11-18 14:28:32,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:32,550 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-11-18 14:28:32,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 3.611111111111111) internal successors, (65), 20 states have internal predecessors, (65), 11 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-18 14:28:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-11-18 14:28:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2024-11-18 14:28:32,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:32,552 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 16, 16, 16, 12, 12, 8, 8, 8, 8, 8, 8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:32,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-18 14:28:32,753 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,SelfDestructingSolverStorable6 [2024-11-18 14:28:32,754 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:32,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:32,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2075948021, now seen corresponding path program 3 times [2024-11-18 14:28:32,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:32,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992997666] [2024-11-18 14:28:32,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:28:32,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:32,790 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 14:28:32,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 1659 trivial. 0 not checked. [2024-11-18 14:28:33,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:33,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992997666] [2024-11-18 14:28:33,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992997666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:33,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880382391] [2024-11-18 14:28:33,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:28:33,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:33,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:33,150 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) [2024-11-18 14:28:33,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 14:28:33,309 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 14:28:33,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:33,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-18 14:28:33,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:33,327 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 [2024-11-18 14:28:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1684 trivial. 0 not checked. [2024-11-18 14:28:33,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2024-11-18 14:28:34,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880382391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:34,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:34,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14] total 32 [2024-11-18 14:28:34,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551146188] [2024-11-18 14:28:34,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:34,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-18 14:28:34,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-18 14:28:34,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2024-11-18 14:28:34,932 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 32 states, 25 states have (on average 2.88) internal successors, (72), 28 states have internal predecessors, (72), 14 states have call successors, (22), 6 states have call predecessors, (22), 10 states have return successors, (23), 14 states have call predecessors, (23), 14 states have call successors, (23) [2024-11-18 14:28:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:35,958 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2024-11-18 14:28:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-18 14:28:35,958 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.88) internal successors, (72), 28 states have internal predecessors, (72), 14 states have call successors, (22), 6 states have call predecessors, (22), 10 states have return successors, (23), 14 states have call predecessors, (23), 14 states have call successors, (23) Word has length 273 [2024-11-18 14:28:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:35,960 INFO L225 Difference]: With dead ends: 106 [2024-11-18 14:28:35,960 INFO L226 Difference]: Without dead ends: 95 [2024-11-18 14:28:35,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=383, Invalid=2269, Unknown=0, NotChecked=0, Total=2652 [2024-11-18 14:28:35,962 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 104 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:35,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 477 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-18 14:28:35,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-18 14:28:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2024-11-18 14:28:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 57 states have internal predecessors, (64), 11 states have call successors, (11), 6 states have call predecessors, (11), 20 states have return successors, (33), 21 states have call predecessors, (33), 11 states have call successors, (33) [2024-11-18 14:28:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2024-11-18 14:28:35,980 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 273 [2024-11-18 14:28:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:35,981 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2024-11-18 14:28:35,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.88) internal successors, (72), 28 states have internal predecessors, (72), 14 states have call successors, (22), 6 states have call predecessors, (22), 10 states have return successors, (23), 14 states have call predecessors, (23), 14 states have call successors, (23) [2024-11-18 14:28:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2024-11-18 14:28:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2024-11-18 14:28:35,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:35,994 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 32, 32, 32, 24, 24, 16, 16, 16, 16, 16, 16, 16, 12, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:36,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 14:28:36,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:36,195 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:36,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1736480485, now seen corresponding path program 1 times [2024-11-18 14:28:36,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:36,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106757160] [2024-11-18 14:28:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:36,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 41 proven. 25 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2024-11-18 14:28:37,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:37,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106757160] [2024-11-18 14:28:37,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106757160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:37,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548370042] [2024-11-18 14:28:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:37,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:37,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:37,870 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) [2024-11-18 14:28:37,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 14:28:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:38,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 2759 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-18 14:28:38,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6955 trivial. 0 not checked. [2024-11-18 14:28:38,361 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 14:28:38,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548370042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:38,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:28:38,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2024-11-18 14:28:38,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340638497] [2024-11-18 14:28:38,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:38,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 14:28:38,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:38,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 14:28:38,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:28:38,363 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-18 14:28:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:38,383 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2024-11-18 14:28:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 14:28:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 518 [2024-11-18 14:28:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:38,385 INFO L225 Difference]: With dead ends: 93 [2024-11-18 14:28:38,385 INFO L226 Difference]: Without dead ends: 88 [2024-11-18 14:28:38,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:28:38,386 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:38,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 168 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:28:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-18 14:28:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2024-11-18 14:28:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 1.2) internal successors, (66), 59 states have internal predecessors, (66), 11 states have call successors, (11), 6 states have call predecessors, (11), 20 states have return successors, (33), 21 states have call predecessors, (33), 11 states have call successors, (33) [2024-11-18 14:28:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2024-11-18 14:28:38,398 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 518 [2024-11-18 14:28:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:38,403 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2024-11-18 14:28:38,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-18 14:28:38,405 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2024-11-18 14:28:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2024-11-18 14:28:38,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:38,411 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 32, 32, 32, 24, 24, 16, 16, 16, 16, 16, 16, 16, 12, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:38,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 14:28:38,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:38,612 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:38,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:38,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1734633443, now seen corresponding path program 1 times [2024-11-18 14:28:38,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:38,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376183731] [2024-11-18 14:28:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:38,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 41 proven. 25 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2024-11-18 14:28:39,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:39,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376183731] [2024-11-18 14:28:39,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376183731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:39,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309990729] [2024-11-18 14:28:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:39,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:39,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:39,777 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) [2024-11-18 14:28:39,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 14:28:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:40,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 2756 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-18 14:28:40,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6955 trivial. 0 not checked. [2024-11-18 14:28:40,308 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 14:28:40,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309990729] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:40,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:28:40,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2024-11-18 14:28:40,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466891380] [2024-11-18 14:28:40,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:40,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 14:28:40,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:40,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 14:28:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:28:40,311 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-18 14:28:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:40,328 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2024-11-18 14:28:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 14:28:40,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 518 [2024-11-18 14:28:40,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:40,332 INFO L225 Difference]: With dead ends: 93 [2024-11-18 14:28:40,332 INFO L226 Difference]: Without dead ends: 90 [2024-11-18 14:28:40,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:28:40,334 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:40,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:28:40,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-18 14:28:40,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-11-18 14:28:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 61 states have internal predecessors, (68), 11 states have call successors, (11), 6 states have call predecessors, (11), 20 states have return successors, (33), 21 states have call predecessors, (33), 11 states have call successors, (33) [2024-11-18 14:28:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2024-11-18 14:28:40,347 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 518 [2024-11-18 14:28:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:40,348 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2024-11-18 14:28:40,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-11-18 14:28:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2024-11-18 14:28:40,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2024-11-18 14:28:40,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:40,350 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 32, 32, 32, 24, 24, 16, 16, 16, 16, 16, 16, 16, 12, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:40,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-18 14:28:40,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-18 14:28:40,555 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:40,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1734631521, now seen corresponding path program 1 times [2024-11-18 14:28:40,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:40,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189005662] [2024-11-18 14:28:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:40,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 41 proven. 25 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2024-11-18 14:28:41,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:41,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189005662] [2024-11-18 14:28:41,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189005662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:41,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755475251] [2024-11-18 14:28:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:41,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:41,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:41,514 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) [2024-11-18 14:28:41,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 14:28:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:42,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 2753 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-18 14:28:42,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:42,028 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 [2024-11-18 14:28:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 2663 proven. 8 refuted. 0 times theorem prover too weak. 4284 trivial. 0 not checked. [2024-11-18 14:28:42,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6955 backedges. 10 proven. 180 refuted. 0 times theorem prover too weak. 6765 trivial. 0 not checked. [2024-11-18 14:28:44,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755475251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:44,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:44,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 14] total 29 [2024-11-18 14:28:44,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678218729] [2024-11-18 14:28:44,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:44,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-18 14:28:44,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:44,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-18 14:28:44,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2024-11-18 14:28:44,233 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 29 states, 22 states have (on average 4.045454545454546) internal successors, (89), 24 states have internal predecessors, (89), 13 states have call successors, (32), 7 states have call predecessors, (32), 10 states have return successors, (35), 11 states have call predecessors, (35), 13 states have call successors, (35) [2024-11-18 14:28:44,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:44,705 INFO L93 Difference]: Finished difference Result 163 states and 211 transitions. [2024-11-18 14:28:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 14:28:44,706 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 4.045454545454546) internal successors, (89), 24 states have internal predecessors, (89), 13 states have call successors, (32), 7 states have call predecessors, (32), 10 states have return successors, (35), 11 states have call predecessors, (35), 13 states have call successors, (35) Word has length 518 [2024-11-18 14:28:44,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:44,706 INFO L225 Difference]: With dead ends: 163 [2024-11-18 14:28:44,707 INFO L226 Difference]: Without dead ends: 77 [2024-11-18 14:28:44,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1057 GetRequests, 1017 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2024-11-18 14:28:44,707 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:44,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 305 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:28:44,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-18 14:28:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-18 14:28:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.183673469387755) internal successors, (58), 54 states have internal predecessors, (58), 10 states have call successors, (10), 5 states have call predecessors, (10), 17 states have return successors, (22), 17 states have call predecessors, (22), 10 states have call successors, (22) [2024-11-18 14:28:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2024-11-18 14:28:44,713 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 518 [2024-11-18 14:28:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:44,714 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2024-11-18 14:28:44,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 4.045454545454546) internal successors, (89), 24 states have internal predecessors, (89), 13 states have call successors, (32), 7 states have call predecessors, (32), 10 states have return successors, (35), 11 states have call predecessors, (35), 13 states have call successors, (35) [2024-11-18 14:28:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2024-11-18 14:28:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1071 [2024-11-18 14:28:44,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:44,719 INFO L215 NwaCegarLoop]: trace histogram [108, 108, 72, 72, 72, 54, 54, 36, 36, 36, 36, 36, 36, 36, 24, 24, 18, 18, 18, 18, 18, 18, 18, 9, 9, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:44,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 14:28:44,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:44,923 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:44,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1388356805, now seen corresponding path program 4 times [2024-11-18 14:28:44,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:44,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860710746] [2024-11-18 14:28:44,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:28:44,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:45,166 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:28:45,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 35067 backedges. 22 proven. 1715 refuted. 0 times theorem prover too weak. 33330 trivial. 0 not checked. [2024-11-18 14:28:48,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:48,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860710746] [2024-11-18 14:28:48,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860710746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:48,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019323247] [2024-11-18 14:28:48,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:28:48,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:48,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:48,466 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) [2024-11-18 14:28:48,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 14:28:49,285 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:28:49,285 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:49,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 5319 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-18 14:28:49,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:49,350 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 [2024-11-18 14:28:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 35067 backedges. 11561 proven. 8 refuted. 0 times theorem prover too weak. 23498 trivial. 0 not checked. [2024-11-18 14:28:49,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 35067 backedges. 1583 proven. 339 refuted. 0 times theorem prover too weak. 33145 trivial. 0 not checked. [2024-11-18 14:28:54,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019323247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:54,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:54,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14] total 28 [2024-11-18 14:28:54,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11695385] [2024-11-18 14:28:54,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:54,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-18 14:28:54,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:54,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-18 14:28:54,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2024-11-18 14:28:54,249 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 28 states, 20 states have (on average 4.2) internal successors, (84), 24 states have internal predecessors, (84), 10 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (37), 7 states have call predecessors, (37), 10 states have call successors, (37) [2024-11-18 14:28:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:54,488 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2024-11-18 14:28:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 14:28:54,489 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 20 states have (on average 4.2) internal successors, (84), 24 states have internal predecessors, (84), 10 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (37), 7 states have call predecessors, (37), 10 states have call successors, (37) Word has length 1070 [2024-11-18 14:28:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:54,490 INFO L225 Difference]: With dead ends: 155 [2024-11-18 14:28:54,490 INFO L226 Difference]: Without dead ends: 81 [2024-11-18 14:28:54,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2158 GetRequests, 2125 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2024-11-18 14:28:54,491 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:54,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 512 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-18 14:28:54,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-18 14:28:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 56 states have internal predecessors, (60), 10 states have call successors, (10), 5 states have call predecessors, (10), 19 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) [2024-11-18 14:28:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2024-11-18 14:28:54,497 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 1070 [2024-11-18 14:28:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:54,497 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2024-11-18 14:28:54,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 20 states have (on average 4.2) internal successors, (84), 24 states have internal predecessors, (84), 10 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (37), 7 states have call predecessors, (37), 10 states have call successors, (37) [2024-11-18 14:28:54,497 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2024-11-18 14:28:54,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1431 [2024-11-18 14:28:54,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:54,505 INFO L215 NwaCegarLoop]: trace histogram [180, 180, 144, 144, 144, 54, 54, 36, 36, 36, 36, 36, 36, 36, 24, 24, 18, 18, 18, 18, 18, 18, 18, 9, 9, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:54,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 14:28:54,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:54,706 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:54,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:54,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1676958907, now seen corresponding path program 5 times [2024-11-18 14:28:54,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:54,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763998361] [2024-11-18 14:28:54,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:28:54,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:54,874 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-18 14:28:54,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 84135 backedges. 20 proven. 4391 refuted. 0 times theorem prover too weak. 79724 trivial. 0 not checked. [2024-11-18 14:28:56,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:56,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763998361] [2024-11-18 14:28:56,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763998361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:56,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920119830] [2024-11-18 14:28:56,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:28:56,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:56,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:56,863 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) [2024-11-18 14:28:56,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 14:29:03,107 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-18 14:29:03,107 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:03,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-18 14:29:03,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:03,163 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 [2024-11-18 14:29:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 84135 backedges. 4293 proven. 24 refuted. 0 times theorem prover too weak. 79818 trivial. 0 not checked. [2024-11-18 14:29:03,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 84135 backedges. 20 proven. 4413 refuted. 0 times theorem prover too weak. 79702 trivial. 0 not checked. [2024-11-18 14:29:09,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920119830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:29:09,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:29:09,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 22] total 34 [2024-11-18 14:29:09,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806735755] [2024-11-18 14:29:09,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:09,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-18 14:29:09,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-18 14:29:09,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2024-11-18 14:29:09,984 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 34 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 10 states have call successors, (31), 8 states have call predecessors, (31), 12 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2024-11-18 14:29:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:10,240 INFO L93 Difference]: Finished difference Result 161 states and 201 transitions. [2024-11-18 14:29:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:29:10,240 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 10 states have call successors, (31), 8 states have call predecessors, (31), 12 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) Word has length 1430 [2024-11-18 14:29:10,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:10,241 INFO L225 Difference]: With dead ends: 161 [2024-11-18 14:29:10,241 INFO L226 Difference]: Without dead ends: 83 [2024-11-18 14:29:10,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2884 GetRequests, 2844 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=1099, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 14:29:10,242 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 93 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:10,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 558 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:29:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-18 14:29:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-18 14:29:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 57 states have internal predecessors, (61), 10 states have call successors, (10), 5 states have call predecessors, (10), 20 states have return successors, (25), 20 states have call predecessors, (25), 10 states have call successors, (25) [2024-11-18 14:29:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2024-11-18 14:29:10,248 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 1430 [2024-11-18 14:29:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:10,248 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2024-11-18 14:29:10,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 3.423076923076923) internal successors, (89), 28 states have internal predecessors, (89), 10 states have call successors, (31), 8 states have call predecessors, (31), 12 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2024-11-18 14:29:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2024-11-18 14:29:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1611 [2024-11-18 14:29:10,258 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:10,258 INFO L215 NwaCegarLoop]: trace histogram [216, 216, 180, 180, 180, 54, 54, 36, 36, 36, 36, 36, 36, 36, 24, 24, 18, 18, 18, 18, 18, 18, 18, 9, 9, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:10,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-18 14:29:10,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-18 14:29:10,462 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:10,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1329502167, now seen corresponding path program 6 times [2024-11-18 14:29:10,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:10,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118115929] [2024-11-18 14:29:10,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:29:10,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:10,590 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-18 14:29:10,591 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 118389 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 118362 trivial. 0 not checked. [2024-11-18 14:29:11,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:11,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118115929] [2024-11-18 14:29:11,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118115929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:11,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664152732] [2024-11-18 14:29:11,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:29:11,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:11,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:11,439 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) [2024-11-18 14:29:11,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 14:29:12,866 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-18 14:29:12,867 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:12,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-18 14:29:12,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:12,914 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 [2024-11-18 14:29:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 118389 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 118374 trivial. 0 not checked. [2024-11-18 14:29:13,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 118389 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 118356 trivial. 0 not checked. [2024-11-18 14:29:19,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664152732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:29:19,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:29:19,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 18] total 40 [2024-11-18 14:29:19,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786972051] [2024-11-18 14:29:19,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:19,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-18 14:29:19,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-18 14:29:19,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-18 14:29:19,591 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 40 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 35 states have internal predecessors, (71), 18 states have call successors, (24), 6 states have call predecessors, (24), 12 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2024-11-18 14:29:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:20,134 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2024-11-18 14:29:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 14:29:20,134 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 35 states have internal predecessors, (71), 18 states have call successors, (24), 6 states have call predecessors, (24), 12 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) Word has length 1610 [2024-11-18 14:29:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:20,137 INFO L225 Difference]: With dead ends: 104 [2024-11-18 14:29:20,137 INFO L226 Difference]: Without dead ends: 87 [2024-11-18 14:29:20,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3245 GetRequests, 3199 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=1774, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 14:29:20,139 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:20,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 328 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:29:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-18 14:29:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-18 14:29:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 59 states have internal predecessors, (63), 10 states have call successors, (10), 5 states have call predecessors, (10), 22 states have return successors, (27), 22 states have call predecessors, (27), 10 states have call successors, (27) [2024-11-18 14:29:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2024-11-18 14:29:20,147 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 1610 [2024-11-18 14:29:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:20,150 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2024-11-18 14:29:20,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 35 states have internal predecessors, (71), 18 states have call successors, (24), 6 states have call predecessors, (24), 12 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2024-11-18 14:29:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2024-11-18 14:29:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2673 [2024-11-18 14:29:20,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:20,212 INFO L215 NwaCegarLoop]: trace histogram [360, 360, 300, 300, 300, 90, 90, 60, 60, 60, 60, 60, 60, 60, 40, 40, 30, 30, 30, 30, 30, 30, 30, 15, 15, 10, 10, 10, 10, 10, 10, 10, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:20,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-18 14:29:20,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-18 14:29:20,413 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:20,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1215418413, now seen corresponding path program 7 times [2024-11-18 14:29:20,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:20,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369385826] [2024-11-18 14:29:20,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:29:20,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 329730 backedges. 204 proven. 10539 refuted. 0 times theorem prover too weak. 318987 trivial. 0 not checked. [2024-11-18 14:29:38,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:38,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369385826] [2024-11-18 14:29:38,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369385826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:38,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558427259] [2024-11-18 14:29:38,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:29:38,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:38,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:38,991 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) [2024-11-18 14:29:38,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 14:29:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:41,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 12206 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-18 14:29:41,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:41,244 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 [2024-11-18 14:29:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 329730 backedges. 162724 proven. 35 refuted. 0 times theorem prover too weak. 166971 trivial. 0 not checked. [2024-11-18 14:29:41,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 329730 backedges. 6450 proven. 4152 refuted. 0 times theorem prover too weak. 319128 trivial. 0 not checked. [2024-11-18 14:29:54,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558427259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:29:54,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:29:54,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 26] total 42 [2024-11-18 14:29:54,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696082872] [2024-11-18 14:29:54,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:54,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-18 14:29:54,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-18 14:29:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2024-11-18 14:29:54,534 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 42 states, 32 states have (on average 3.0) internal successors, (96), 35 states have internal predecessors, (96), 12 states have call successors, (34), 9 states have call predecessors, (34), 15 states have return successors, (46), 13 states have call predecessors, (46), 12 states have call successors, (46) [2024-11-18 14:29:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:55,138 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2024-11-18 14:29:55,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 14:29:55,138 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 32 states have (on average 3.0) internal successors, (96), 35 states have internal predecessors, (96), 12 states have call successors, (34), 9 states have call predecessors, (34), 15 states have return successors, (46), 13 states have call predecessors, (46), 12 states have call successors, (46) Word has length 2672 [2024-11-18 14:29:55,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:55,139 INFO L225 Difference]: With dead ends: 173 [2024-11-18 14:29:55,139 INFO L226 Difference]: Without dead ends: 89 [2024-11-18 14:29:55,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5376 GetRequests, 5323 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2024-11-18 14:29:55,142 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 72 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:55,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 831 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:29:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-18 14:29:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-18 14:29:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 60 states have internal predecessors, (64), 10 states have call successors, (10), 5 states have call predecessors, (10), 23 states have return successors, (28), 23 states have call predecessors, (28), 10 states have call successors, (28) [2024-11-18 14:29:55,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2024-11-18 14:29:55,150 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 2672 [2024-11-18 14:29:55,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:55,150 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2024-11-18 14:29:55,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 32 states have (on average 3.0) internal successors, (96), 35 states have internal predecessors, (96), 12 states have call successors, (34), 9 states have call predecessors, (34), 15 states have return successors, (46), 13 states have call predecessors, (46), 12 states have call successors, (46) [2024-11-18 14:29:55,151 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2024-11-18 14:29:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2973 [2024-11-18 14:29:55,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:55,180 INFO L215 NwaCegarLoop]: trace histogram [420, 420, 360, 360, 360, 90, 90, 60, 60, 60, 60, 60, 60, 60, 40, 40, 30, 30, 30, 30, 30, 30, 30, 15, 15, 10, 10, 10, 10, 10, 10, 10, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:55,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-18 14:29:55,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-18 14:29:55,385 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:55,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash -14748233, now seen corresponding path program 8 times [2024-11-18 14:29:55,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:55,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059707583] [2024-11-18 14:29:55,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:29:55,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:56,134 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:29:56,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat