./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d 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_nla-digbench/recursified_dijkstra-u.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 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 08:02:25,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 08:02:25,070 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 08:02:25,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 08:02:25,076 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 08:02:25,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 08:02:25,100 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 08:02:25,100 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 08:02:25,101 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 08:02:25,102 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 08:02:25,102 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 08:02:25,102 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 08:02:25,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 08:02:25,104 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 08:02:25,104 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 08:02:25,105 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 08:02:25,105 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 08:02:25,105 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 08:02:25,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 08:02:25,106 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 08:02:25,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 08:02:25,109 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 08:02:25,109 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 08:02:25,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 08:02:25,110 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 08:02:25,110 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 08:02:25,110 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 08:02:25,110 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 08:02:25,110 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 08:02:25,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 08:02:25,111 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 08:02:25,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 08:02:25,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:02:25,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 08:02:25,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 08:02:25,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 08:02:25,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 08:02:25,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 08:02:25,113 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 08:02:25,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 08:02:25,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 08:02:25,114 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 08:02:25,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 [2024-11-16 08:02:25,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 08:02:25,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 08:02:25,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 08:02:25,347 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 08:02:25,347 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 08:02:25,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-11-16 08:02:26,714 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 08:02:26,868 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 08:02:26,872 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-11-16 08:02:26,881 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca0a5572/7dea7a38c0a746baab329a8e42e584f4/FLAG69d021405 [2024-11-16 08:02:26,896 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca0a5572/7dea7a38c0a746baab329a8e42e584f4 [2024-11-16 08:02:26,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 08:02:26,898 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 08:02:26,901 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 08:02:26,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 08:02:26,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 08:02:26,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:02:26" (1/1) ... [2024-11-16 08:02:26,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea49ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:26, skipping insertion in model container [2024-11-16 08:02:26,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:02:26" (1/1) ... [2024-11-16 08:02:26,926 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 08:02:27,056 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_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2024-11-16 08:02:27,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:02:27,094 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 08:02:27,103 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_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2024-11-16 08:02:27,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:02:27,134 INFO L204 MainTranslator]: Completed translation [2024-11-16 08:02:27,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27 WrapperNode [2024-11-16 08:02:27,135 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 08:02:27,136 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 08:02:27,136 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 08:02:27,136 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 08:02:27,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,155 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,176 INFO L138 Inliner]: procedures = 17, calls = 173, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2024-11-16 08:02:27,176 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 08:02:27,177 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 08:02:27,177 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 08:02:27,177 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 08:02:27,184 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,184 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,187 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,199 INFO L175 MemorySlicer]: Split 139 memory accesses to 6 slices as follows [2, 35, 30, 21, 22, 29]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 3, 2, 1, 2, 3]. [2024-11-16 08:02:27,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,199 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,214 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,215 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,217 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,218 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 08:02:27,222 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 08:02:27,222 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 08:02:27,226 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 08:02:27,227 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (1/1) ... [2024-11-16 08:02:27,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:02:27,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:02:27,255 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) [2024-11-16 08:02:27,258 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 [2024-11-16 08:02:27,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 08:02:27,315 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_33_0 [2024-11-16 08:02:27,317 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_33_0 [2024-11-16 08:02:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 08:02:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 08:02:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 08:02:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 08:02:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-16 08:02:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-16 08:02:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 08:02:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 08:02:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 08:02:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 08:02:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 08:02:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-16 08:02:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-16 08:02:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_53_0 [2024-11-16 08:02:27,319 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_53_0 [2024-11-16 08:02:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 08:02:27,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 08:02:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 08:02:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 08:02:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 08:02:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 08:02:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-16 08:02:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-16 08:02:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 08:02:27,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 08:02:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 08:02:27,505 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 08:02:27,507 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 08:02:27,715 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L108: call ULTIMATE.dealloc(main_~#n~0#1.base, main_~#n~0#1.offset);havoc main_~#n~0#1.base, main_~#n~0#1.offset;call ULTIMATE.dealloc(main_~#p~0#1.base, main_~#p~0#1.offset);havoc main_~#p~0#1.base, main_~#p~0#1.offset;call ULTIMATE.dealloc(main_~#q~0#1.base, main_~#q~0#1.offset);havoc main_~#q~0#1.base, main_~#q~0#1.offset;call ULTIMATE.dealloc(main_~#r~0#1.base, main_~#r~0#1.offset);havoc main_~#r~0#1.base, main_~#r~0#1.offset;call ULTIMATE.dealloc(main_~#h~0#1.base, main_~#h~0#1.offset);havoc main_~#h~0#1.base, main_~#h~0#1.offset; [2024-11-16 08:02:27,777 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-16 08:02:27,777 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 08:02:27,796 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 08:02:27,796 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 08:02:27,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:02:27 BoogieIcfgContainer [2024-11-16 08:02:27,797 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 08:02:27,799 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 08:02:27,800 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 08:02:27,802 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 08:02:27,803 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:02:26" (1/3) ... [2024-11-16 08:02:27,803 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101d04b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:02:27, skipping insertion in model container [2024-11-16 08:02:27,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:02:27" (2/3) ... [2024-11-16 08:02:27,804 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101d04b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:02:27, skipping insertion in model container [2024-11-16 08:02:27,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:02:27" (3/3) ... [2024-11-16 08:02:27,807 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra-u.c [2024-11-16 08:02:27,820 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 08:02:27,821 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 08:02:27,877 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 08:02:27,884 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;@67ca47de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 08:02:27,886 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 08:02:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-16 08:02:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-16 08:02:27,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:02:27,895 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:02:27,896 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:02:27,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:02:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash -996904839, now seen corresponding path program 1 times [2024-11-16 08:02:27,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:02:27,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965916702] [2024-11-16 08:02:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:02:27,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:02:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:28,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-16 08:02:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:02:28,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:02:28,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965916702] [2024-11-16 08:02:28,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965916702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 08:02:28,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 08:02:28,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 08:02:28,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022169483] [2024-11-16 08:02:28,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:02:28,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 08:02:28,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:02:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 08:02:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 08:02:28,130 INFO L87 Difference]: Start difference. First operand has 48 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:02:28,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:02:28,274 INFO L93 Difference]: Finished difference Result 97 states and 143 transitions. [2024-11-16 08:02:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 08:02:28,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-16 08:02:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:02:28,283 INFO L225 Difference]: With dead ends: 97 [2024-11-16 08:02:28,284 INFO L226 Difference]: Without dead ends: 48 [2024-11-16 08:02:28,287 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 08:02:28,290 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:02:28,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 50 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:02:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-16 08:02:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-11-16 08:02:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-16 08:02:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2024-11-16 08:02:28,322 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 17 [2024-11-16 08:02:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:02:28,322 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2024-11-16 08:02:28,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:02:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2024-11-16 08:02:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-16 08:02:28,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:02:28,324 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:02:28,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 08:02:28,324 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:02:28,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:02:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash -621940144, now seen corresponding path program 1 times [2024-11-16 08:02:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:02:28,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835399133] [2024-11-16 08:02:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:02:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:02:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:29,135 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-16 08:02:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:02:29,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:02:29,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835399133] [2024-11-16 08:02:29,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835399133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 08:02:29,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 08:02:29,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-16 08:02:29,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534023809] [2024-11-16 08:02:29,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:02:29,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 08:02:29,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:02:29,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 08:02:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-16 08:02:29,308 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 13 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:02:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:02:29,925 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-11-16 08:02:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 08:02:29,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-16 08:02:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:02:29,927 INFO L225 Difference]: With dead ends: 78 [2024-11-16 08:02:29,927 INFO L226 Difference]: Without dead ends: 75 [2024-11-16 08:02:29,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-11-16 08:02:29,929 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-16 08:02:29,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 145 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-16 08:02:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-16 08:02:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2024-11-16 08:02:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 42 states have (on average 1.119047619047619) internal successors, (47), 45 states have internal predecessors, (47), 20 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2024-11-16 08:02:29,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2024-11-16 08:02:29,951 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 18 [2024-11-16 08:02:29,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:02:29,951 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2024-11-16 08:02:29,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:02:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2024-11-16 08:02:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-16 08:02:29,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:02:29,952 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:02:29,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 08:02:29,952 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:02:29,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:02:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1563503153, now seen corresponding path program 1 times [2024-11-16 08:02:29,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:02:29,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795513827] [2024-11-16 08:02:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:02:29,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:02:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:02:29,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863830524] [2024-11-16 08:02:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:02:29,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:02:29,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:02:29,985 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) [2024-11-16 08:02:29,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 08:02:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:30,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-16 08:02:30,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:02:30,290 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 [2024-11-16 08:02:30,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-16 08:02:30,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:02:30,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:02:30,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 08:02:30,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 08:02:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:02:30,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:02:30,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-11-16 08:02:30,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:02:30,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795513827] [2024-11-16 08:02:30,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:02:30,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863830524] [2024-11-16 08:02:30,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863830524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:30,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 08:02:30,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-16 08:02:30,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508327321] [2024-11-16 08:02:30,851 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 08:02:30,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 08:02:30,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:02:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 08:02:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-16 08:02:30,852 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 08:02:31,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:02:31,344 INFO L93 Difference]: Finished difference Result 118 states and 154 transitions. [2024-11-16 08:02:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 08:02:31,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-16 08:02:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:02:31,346 INFO L225 Difference]: With dead ends: 118 [2024-11-16 08:02:31,346 INFO L226 Difference]: Without dead ends: 115 [2024-11-16 08:02:31,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-16 08:02:31,348 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 08:02:31,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 214 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 08:02:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-16 08:02:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2024-11-16 08:02:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.126984126984127) internal successors, (71), 67 states have internal predecessors, (71), 30 states have call successors, (30), 8 states have call predecessors, (30), 11 states have return successors, (37), 29 states have call predecessors, (37), 28 states have call successors, (37) [2024-11-16 08:02:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2024-11-16 08:02:31,365 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 24 [2024-11-16 08:02:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:02:31,365 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2024-11-16 08:02:31,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 08:02:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2024-11-16 08:02:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-16 08:02:31,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:02:31,366 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:02:31,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 08:02:31,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:02:31,568 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:02:31,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:02:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1585215089, now seen corresponding path program 1 times [2024-11-16 08:02:31,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:02:31,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255590921] [2024-11-16 08:02:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:02:31,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:02:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:32,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-16 08:02:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:32,373 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:02:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 08:02:32,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:02:32,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255590921] [2024-11-16 08:02:32,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255590921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:32,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244918686] [2024-11-16 08:02:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:02:32,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:02:32,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:02:32,524 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) [2024-11-16 08:02:32,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 08:02:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:32,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-16 08:02:32,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:02:32,603 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 [2024-11-16 08:02:32,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:02:32,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-16 08:02:32,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:02:32,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:02:32,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 08:02:32,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2024-11-16 08:02:33,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-16 08:02:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 08:02:33,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:02:33,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244918686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:33,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:02:33,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2024-11-16 08:02:33,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681798683] [2024-11-16 08:02:33,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:02:33,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-16 08:02:33,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:02:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-16 08:02:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2024-11-16 08:02:33,968 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-16 08:02:38,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 08:02:43,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 08:02:52,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 08:02:56,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 08:02:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:02:56,699 INFO L93 Difference]: Finished difference Result 159 states and 206 transitions. [2024-11-16 08:02:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-16 08:02:56,699 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2024-11-16 08:02:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:02:56,701 INFO L225 Difference]: With dead ends: 159 [2024-11-16 08:02:56,701 INFO L226 Difference]: Without dead ends: 156 [2024-11-16 08:02:56,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=280, Invalid=2799, Unknown=1, NotChecked=0, Total=3080 [2024-11-16 08:02:56,706 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 125 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 90 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2024-11-16 08:02:56,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 328 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1684 Invalid, 4 Unknown, 0 Unchecked, 17.8s Time] [2024-11-16 08:02:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-16 08:02:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2024-11-16 08:02:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 91 states have internal predecessors, (98), 37 states have call successors, (37), 13 states have call predecessors, (37), 17 states have return successors, (48), 37 states have call predecessors, (48), 35 states have call successors, (48) [2024-11-16 08:02:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 183 transitions. [2024-11-16 08:02:56,745 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 183 transitions. Word has length 24 [2024-11-16 08:02:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:02:56,745 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 183 transitions. [2024-11-16 08:02:56,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-16 08:02:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 183 transitions. [2024-11-16 08:02:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-16 08:02:56,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:02:56,747 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:02:56,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 08:02:56,950 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,SelfDestructingSolverStorable3 [2024-11-16 08:02:56,951 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:02:56,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:02:56,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1975557262, now seen corresponding path program 2 times [2024-11-16 08:02:56,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:02:56,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673257308] [2024-11-16 08:02:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:02:56,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:02:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:57,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-16 08:02:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:58,190 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:02:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:58,541 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:02:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 08:02:58,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:02:58,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673257308] [2024-11-16 08:02:58,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673257308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:58,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259076572] [2024-11-16 08:02:58,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 08:02:58,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:02:58,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:02:58,730 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) [2024-11-16 08:02:58,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 08:02:58,823 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 08:02:58,823 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:02:58,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-16 08:02:58,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:02:58,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 08:02:58,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-16 08:02:58,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:02:58,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:02:59,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 08:02:59,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2024-11-16 08:02:59,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:02:59,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-16 08:02:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 08:02:59,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:03:01,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259076572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:03:01,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:03:01,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2024-11-16 08:03:01,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508144893] [2024-11-16 08:03:01,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:03:01,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-16 08:03:01,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:03:01,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-16 08:03:01,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2024-11-16 08:03:01,094 INFO L87 Difference]: Start difference. First operand 142 states and 183 transitions. Second operand has 34 states, 25 states have (on average 1.4) internal successors, (35), 26 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:03:10,490 WARN L286 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 101 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-16 08:03:19,320 WARN L286 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 110 DAG size of output: 70 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-16 08:03:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:03:22,125 INFO L93 Difference]: Finished difference Result 193 states and 250 transitions. [2024-11-16 08:03:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-16 08:03:22,125 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 25 states have (on average 1.4) internal successors, (35), 26 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2024-11-16 08:03:22,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:03:22,128 INFO L225 Difference]: With dead ends: 193 [2024-11-16 08:03:22,128 INFO L226 Difference]: Without dead ends: 190 [2024-11-16 08:03:22,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=429, Invalid=4401, Unknown=0, NotChecked=0, Total=4830 [2024-11-16 08:03:22,130 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 132 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 2511 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-16 08:03:22,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 574 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2511 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-16 08:03:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-16 08:03:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 152. [2024-11-16 08:03:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 93 states have (on average 1.1290322580645162) internal successors, (105), 98 states have internal predecessors, (105), 38 states have call successors, (38), 14 states have call predecessors, (38), 20 states have return successors, (51), 39 states have call predecessors, (51), 36 states have call successors, (51) [2024-11-16 08:03:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2024-11-16 08:03:22,183 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 30 [2024-11-16 08:03:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:03:22,184 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2024-11-16 08:03:22,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 25 states have (on average 1.4) internal successors, (35), 26 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:03:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2024-11-16 08:03:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-16 08:03:22,185 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:03:22,185 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-16 08:03:22,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 08:03:22,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:03:22,386 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:03:22,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:03:22,386 INFO L85 PathProgramCache]: Analyzing trace with hash -98662580, now seen corresponding path program 1 times [2024-11-16 08:03:22,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:03:22,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928985624] [2024-11-16 08:03:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:03:22,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:03:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:03:22,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288214160] [2024-11-16 08:03:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:03:22,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:03:22,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:03:22,419 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) [2024-11-16 08:03:22,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 08:03:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:03:22,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-16 08:03:22,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:03:22,544 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 [2024-11-16 08:03:22,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-16 08:03:22,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:03:22,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:03:22,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:03:22,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:03:22,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-16 08:03:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 08:03:22,947 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:03:29,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:03:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928985624] [2024-11-16 08:03:29,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:03:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288214160] [2024-11-16 08:03:29,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288214160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:03:29,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 08:03:29,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-16 08:03:29,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034796294] [2024-11-16 08:03:29,179 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 08:03:29,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 08:03:29,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:03:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 08:03:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-16 08:03:29,181 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 08:03:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:03:29,859 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2024-11-16 08:03:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 08:03:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-16 08:03:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:03:29,861 INFO L225 Difference]: With dead ends: 172 [2024-11-16 08:03:29,861 INFO L226 Difference]: Without dead ends: 169 [2024-11-16 08:03:29,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-16 08:03:29,862 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 08:03:29,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 208 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 08:03:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-16 08:03:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2024-11-16 08:03:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 107 states have internal predecessors, (115), 41 states have call successors, (41), 16 states have call predecessors, (41), 22 states have return successors, (53), 42 states have call predecessors, (53), 38 states have call successors, (53) [2024-11-16 08:03:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 209 transitions. [2024-11-16 08:03:29,885 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 209 transitions. Word has length 30 [2024-11-16 08:03:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:03:29,885 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 209 transitions. [2024-11-16 08:03:29,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 08:03:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 209 transitions. [2024-11-16 08:03:29,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-16 08:03:29,886 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:03:29,886 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:03:29,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 08:03:30,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:03:30,091 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:03:30,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:03:30,091 INFO L85 PathProgramCache]: Analyzing trace with hash -954492083, now seen corresponding path program 3 times [2024-11-16 08:03:30,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:03:30,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147433478] [2024-11-16 08:03:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:03:30,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:03:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:03:30,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-16 08:03:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:03:31,216 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:03:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:03:31,531 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:03:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:03:31,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:03:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:03:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 08:03:31,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:03:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147433478] [2024-11-16 08:03:31,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147433478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:03:31,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335801569] [2024-11-16 08:03:31,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 08:03:31,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:03:31,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:03:31,982 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) [2024-11-16 08:03:31,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 08:03:32,193 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 08:03:32,194 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:03:32,200 WARN L253 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-16 08:03:32,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:03:32,217 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 [2024-11-16 08:03:32,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-16 08:03:32,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:03:32,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:03:33,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 08:03:33,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2024-11-16 08:03:33,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:03:33,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-16 08:03:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-16 08:03:33,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:03:35,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335801569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:03:35,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:03:35,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2024-11-16 08:03:35,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476135359] [2024-11-16 08:03:35,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:03:35,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-16 08:03:35,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:03:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-16 08:03:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1842, Unknown=0, NotChecked=0, Total=1980 [2024-11-16 08:03:35,054 INFO L87 Difference]: Start difference. First operand 166 states and 209 transitions. Second operand has 38 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-16 08:03:44,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 08:03:50,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 08:03:55,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-16 08:03:59,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]