./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.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_loop-invariants/recursified_linear-inequality-inv-a.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 fab3df42fb7f885fd39a281a051af0420a7d494ced4f3c2e06236facb6a7ec78 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 08:01:18,248 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 08:01:18,320 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 08:01:18,326 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 08:01:18,328 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 08:01:18,362 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 08:01:18,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 08:01:18,363 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 08:01:18,363 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 08:01:18,365 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 08:01:18,366 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 08:01:18,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 08:01:18,367 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 08:01:18,369 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 08:01:18,369 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 08:01:18,369 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 08:01:18,370 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 08:01:18,370 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 08:01:18,370 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 08:01:18,370 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 08:01:18,371 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 08:01:18,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 08:01:18,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 08:01:18,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 08:01:18,372 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 08:01:18,373 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 08:01:18,373 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 08:01:18,373 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 08:01:18,374 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 08:01:18,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 08:01:18,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 08:01:18,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 08:01:18,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:01:18,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 08:01:18,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 08:01:18,375 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 08:01:18,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 08:01:18,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 08:01:18,376 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 08:01:18,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 08:01:18,376 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 08:01:18,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 08:01:18,377 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab3df42fb7f885fd39a281a051af0420a7d494ced4f3c2e06236facb6a7ec78 [2024-11-16 08:01:18,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 08:01:18,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 08:01:18,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 08:01:18,669 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 08:01:18,672 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 08:01:18,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c [2024-11-16 08:01:20,066 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 08:01:20,254 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 08:01:20,255 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c [2024-11-16 08:01:20,261 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d2455d37/07c12d68c4ee41a79b76e79fb437ec91/FLAG248853954 [2024-11-16 08:01:20,640 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d2455d37/07c12d68c4ee41a79b76e79fb437ec91 [2024-11-16 08:01:20,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 08:01:20,644 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 08:01:20,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 08:01:20,646 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 08:01:20,650 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 08:01:20,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef0ba80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20, skipping insertion in model container [2024-11-16 08:01:20,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,670 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 08:01:20,849 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1474,1487] [2024-11-16 08:01:20,853 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1547,1560] [2024-11-16 08:01:20,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:01:20,861 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 08:01:20,876 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1474,1487] [2024-11-16 08:01:20,877 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1547,1560] [2024-11-16 08:01:20,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:01:20,895 INFO L204 MainTranslator]: Completed translation [2024-11-16 08:01:20,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20 WrapperNode [2024-11-16 08:01:20,896 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 08:01:20,897 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 08:01:20,897 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 08:01:20,897 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 08:01:20,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,910 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,928 INFO L138 Inliner]: procedures = 13, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-11-16 08:01:20,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 08:01:20,929 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 08:01:20,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 08:01:20,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 08:01:20,938 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,940 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,965 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 3, 5, 4, 4]. 28 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-11-16 08:01:20,966 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,966 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,972 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,973 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,975 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,976 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 08:01:20,983 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 08:01:20,983 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 08:01:20,983 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 08:01:20,984 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (1/1) ... [2024-11-16 08:01:20,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:01:20,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:21,015 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 08:01:21,020 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 08:01:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 08:01:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 08:01:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 08:01:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 08:01:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 08:01:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-16 08:01:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 08:01:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 08:01:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 08:01:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 08:01:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 08:01:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-16 08:01:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 08:01:21,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 08:01:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 08:01:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 08:01:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 08:01:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 08:01:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-16 08:01:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 08:01:21,074 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_15_0 [2024-11-16 08:01:21,074 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_15_0 [2024-11-16 08:01:21,179 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 08:01:21,182 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 08:01:21,355 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L38: 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_~#v~0#1.base, main_~#v~0#1.offset);havoc main_~#v~0#1.base, main_~#v~0#1.offset;call ULTIMATE.dealloc(main_~#s~0#1.base, main_~#s~0#1.offset);havoc main_~#s~0#1.base, main_~#s~0#1.offset;call ULTIMATE.dealloc(main_~#i~0#1.base, main_~#i~0#1.offset);havoc main_~#i~0#1.base, main_~#i~0#1.offset; [2024-11-16 08:01:21,400 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-11-16 08:01:21,404 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 08:01:21,416 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 08:01:21,417 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 08:01:21,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:01:21 BoogieIcfgContainer [2024-11-16 08:01:21,418 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 08:01:21,421 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 08:01:21,421 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 08:01:21,424 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 08:01:21,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:01:20" (1/3) ... [2024-11-16 08:01:21,425 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad2db43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:01:21, skipping insertion in model container [2024-11-16 08:01:21,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:01:20" (2/3) ... [2024-11-16 08:01:21,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad2db43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:01:21, skipping insertion in model container [2024-11-16 08:01:21,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:01:21" (3/3) ... [2024-11-16 08:01:21,428 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_linear-inequality-inv-a.c [2024-11-16 08:01:21,449 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 08:01:21,449 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-16 08:01:21,511 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 08:01:21,533 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;@5071ba24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 08:01:21,534 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 08:01:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.4) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-16 08:01:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 08:01:21,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:21,552 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:21,553 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:21,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:21,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1519671576, now seen corresponding path program 1 times [2024-11-16 08:01:21,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:21,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376884975] [2024-11-16 08:01:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:21,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:22,157 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:22,265 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 08:01:22,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:22,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376884975] [2024-11-16 08:01:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376884975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 08:01:22,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 08:01:22,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 08:01:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805956422] [2024-11-16 08:01:22,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:01:22,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 08:01:22,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 08:01:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-16 08:01:22,303 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.4) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:01:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:22,392 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-16 08:01:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 08:01:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-16 08:01:22,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:22,403 INFO L225 Difference]: With dead ends: 30 [2024-11-16 08:01:22,403 INFO L226 Difference]: Without dead ends: 20 [2024-11-16 08:01:22,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-16 08:01:22,411 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:22,415 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 61 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-16 08:01:22,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-16 08:01:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 08:01:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-16 08:01:22,457 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2024-11-16 08:01:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:22,458 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-16 08:01:22,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:01:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-16 08:01:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-16 08:01:22,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:22,460 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:22,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 08:01:22,461 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:22,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:22,462 INFO L85 PathProgramCache]: Analyzing trace with hash 134823112, now seen corresponding path program 1 times [2024-11-16 08:01:22,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:22,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206123956] [2024-11-16 08:01:22,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:22,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:22,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:22,903 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 08:01:22,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:22,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206123956] [2024-11-16 08:01:22,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206123956] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 08:01:22,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 08:01:22,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-16 08:01:22,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038768389] [2024-11-16 08:01:22,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:01:22,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 08:01:22,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:22,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 08:01:22,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-16 08:01:22,909 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:01:23,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:23,046 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2024-11-16 08:01:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 08:01:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-11-16 08:01:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:23,052 INFO L225 Difference]: With dead ends: 23 [2024-11-16 08:01:23,052 INFO L226 Difference]: Without dead ends: 18 [2024-11-16 08:01:23,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-16 08:01:23,054 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:23,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-16 08:01:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-16 08:01:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-16 08:01:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-11-16 08:01:23,066 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2024-11-16 08:01:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:23,066 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-11-16 08:01:23,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:01:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-11-16 08:01:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-16 08:01:23,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:23,068 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:23,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 08:01:23,069 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:23,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:23,070 INFO L85 PathProgramCache]: Analyzing trace with hash -364994800, now seen corresponding path program 1 times [2024-11-16 08:01:23,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:23,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115585651] [2024-11-16 08:01:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:23,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:23,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:23,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 08:01:23,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:23,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115585651] [2024-11-16 08:01:23,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115585651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:23,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214070362] [2024-11-16 08:01:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:23,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:23,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:24,001 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 08:01:24,006 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 08:01:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:24,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-16 08:01:24,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:24,246 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 08:01:24,317 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 25 treesize of output 17 [2024-11-16 08:01:24,358 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 21 treesize of output 13 [2024-11-16 08:01:24,362 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 08:01:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:01:24,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:24,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:01:25,016 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 76 treesize of output 72 [2024-11-16 08:01:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:01:25,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214070362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:01:25,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:01:25,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-11-16 08:01:25,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384203635] [2024-11-16 08:01:25,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:25,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 08:01:25,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 08:01:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-16 08:01:25,613 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 21 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:01:25,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:25,959 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2024-11-16 08:01:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 08:01:25,960 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 16 [2024-11-16 08:01:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:25,961 INFO L225 Difference]: With dead ends: 28 [2024-11-16 08:01:25,961 INFO L226 Difference]: Without dead ends: 24 [2024-11-16 08:01:25,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2024-11-16 08:01:25,963 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:25,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 114 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 08:01:25,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-16 08:01:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-16 08:01:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 08:01:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-16 08:01:25,969 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2024-11-16 08:01:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:25,969 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-16 08:01:25,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:01:25,970 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-16 08:01:25,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-16 08:01:25,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:25,971 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:25,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 08:01:26,175 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 08:01:26,176 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:26,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:26,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1570064800, now seen corresponding path program 1 times [2024-11-16 08:01:26,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:26,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435308523] [2024-11-16 08:01:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:26,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:26,426 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:26,627 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 08:01:26,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:26,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435308523] [2024-11-16 08:01:26,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435308523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:26,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724686639] [2024-11-16 08:01:26,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:26,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:26,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:26,682 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 08:01:26,684 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 08:01:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:26,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-16 08:01:26,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:26,805 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 08:01:26,862 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 25 treesize of output 17 [2024-11-16 08:01:26,886 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 13 treesize of output 9 [2024-11-16 08:01:26,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-16 08:01:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:01:26,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:27,214 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 9 treesize of output 5 [2024-11-16 08:01:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:01:27,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724686639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:01:27,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:01:27,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 22 [2024-11-16 08:01:27,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935128758] [2024-11-16 08:01:27,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:27,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 08:01:27,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:27,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 08:01:27,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-11-16 08:01:27,401 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 22 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 5 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:01:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:27,591 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2024-11-16 08:01:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 08:01:27,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 5 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 17 [2024-11-16 08:01:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:27,592 INFO L225 Difference]: With dead ends: 27 [2024-11-16 08:01:27,592 INFO L226 Difference]: Without dead ends: 22 [2024-11-16 08:01:27,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-11-16 08:01:27,594 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:27,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 59 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-16 08:01:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-16 08:01:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 08:01:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-16 08:01:27,606 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2024-11-16 08:01:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:27,606 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-16 08:01:27,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 5 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:01:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-16 08:01:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-16 08:01:27,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:27,607 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:27,625 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 08:01:27,812 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 08:01:27,813 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:27,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:27,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1642325280, now seen corresponding path program 2 times [2024-11-16 08:01:27,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:27,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773335692] [2024-11-16 08:01:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:27,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:28,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:28,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:28,763 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 08:01:28,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:28,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773335692] [2024-11-16 08:01:28,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773335692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:28,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733930992] [2024-11-16 08:01:28,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 08:01:28,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:28,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:28,819 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 08:01:28,820 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 08:01:28,914 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 08:01:28,914 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:01:28,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-16 08:01:28,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:28,965 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 23 treesize of output 19 [2024-11-16 08:01:29,040 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 08:01:29,171 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 23 treesize of output 3 [2024-11-16 08:01:29,204 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 36 treesize of output 24 [2024-11-16 08:01:29,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-16 08:01:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 08:01:29,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:29,614 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 81 treesize of output 65 [2024-11-16 08:01:29,917 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 76 treesize of output 72 [2024-11-16 08:01:30,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733930992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:30,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:01:30,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-11-16 08:01:30,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476099774] [2024-11-16 08:01:30,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:30,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 08:01:30,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 08:01:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-16 08:01:30,275 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:01:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:30,480 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2024-11-16 08:01:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 08:01:30,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 21 [2024-11-16 08:01:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:30,482 INFO L225 Difference]: With dead ends: 28 [2024-11-16 08:01:30,482 INFO L226 Difference]: Without dead ends: 26 [2024-11-16 08:01:30,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2024-11-16 08:01:30,485 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:30,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 86 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:30,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-16 08:01:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-16 08:01:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 08:01:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-11-16 08:01:30,497 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2024-11-16 08:01:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:30,497 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-11-16 08:01:30,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:01:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-11-16 08:01:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-16 08:01:30,498 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:30,499 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:30,516 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 08:01:30,702 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 08:01:30,703 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:30,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:30,703 INFO L85 PathProgramCache]: Analyzing trace with hash -627522160, now seen corresponding path program 2 times [2024-11-16 08:01:30,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:30,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370864262] [2024-11-16 08:01:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:30,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:30,958 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,172 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,302 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-16 08:01:31,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:31,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370864262] [2024-11-16 08:01:31,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370864262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:31,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444829095] [2024-11-16 08:01:31,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 08:01:31,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:31,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:31,337 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 08:01:31,339 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 08:01:31,429 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 08:01:31,429 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:01:31,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-16 08:01:31,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:31,472 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 23 treesize of output 19 [2024-11-16 08:01:31,548 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 08:01:31,659 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 23 treesize of output 3 [2024-11-16 08:01:31,689 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 29 treesize of output 21 [2024-11-16 08:01:31,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-16 08:01:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 08:01:31,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:32,033 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 59 treesize of output 47 [2024-11-16 08:01:32,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444829095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:32,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:01:32,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2024-11-16 08:01:32,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700774151] [2024-11-16 08:01:32,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:32,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 08:01:32,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:32,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 08:01:32,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2024-11-16 08:01:32,370 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:01:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:32,582 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2024-11-16 08:01:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 08:01:32,582 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 22 [2024-11-16 08:01:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:32,583 INFO L225 Difference]: With dead ends: 29 [2024-11-16 08:01:32,583 INFO L226 Difference]: Without dead ends: 24 [2024-11-16 08:01:32,584 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2024-11-16 08:01:32,584 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:32,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 88 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-16 08:01:32,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-16 08:01:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 08:01:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-16 08:01:32,589 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2024-11-16 08:01:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:32,590 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-16 08:01:32,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-16 08:01:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-16 08:01:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-16 08:01:32,590 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:32,590 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:32,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 08:01:32,791 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 08:01:32,791 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:32,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:32,792 INFO L85 PathProgramCache]: Analyzing trace with hash 834592840, now seen corresponding path program 3 times [2024-11-16 08:01:32,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:32,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264173196] [2024-11-16 08:01:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:32,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:33,243 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:33,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:34,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:34,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 08:01:34,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:34,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264173196] [2024-11-16 08:01:34,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264173196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:34,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5821679] [2024-11-16 08:01:34,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 08:01:34,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:34,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:34,268 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 08:01:34,270 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 08:01:34,397 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 08:01:34,397 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:01:34,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-16 08:01:34,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:34,458 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 23 treesize of output 19 [2024-11-16 08:01:34,530 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 23 treesize of output 19 [2024-11-16 08:01:34,566 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 08:01:34,749 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 23 treesize of output 3 [2024-11-16 08:01:34,788 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 36 treesize of output 24 [2024-11-16 08:01:34,792 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 28 treesize of output 16 [2024-11-16 08:01:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 08:01:34,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:35,280 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 109 treesize of output 93 [2024-11-16 08:01:35,286 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 93 treesize of output 77 [2024-11-16 08:01:35,769 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 52 treesize of output 48 [2024-11-16 08:01:35,776 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 78 treesize of output 74 [2024-11-16 08:01:36,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5821679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:36,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:01:36,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2024-11-16 08:01:36,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175099968] [2024-11-16 08:01:36,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:36,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 08:01:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 08:01:36,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2024-11-16 08:01:36,020 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-16 08:01:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:36,205 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2024-11-16 08:01:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 08:01:36,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 26 [2024-11-16 08:01:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:36,207 INFO L225 Difference]: With dead ends: 30 [2024-11-16 08:01:36,207 INFO L226 Difference]: Without dead ends: 28 [2024-11-16 08:01:36,207 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2024-11-16 08:01:36,208 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:36,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 102 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-16 08:01:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-16 08:01:36,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 5 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-16 08:01:36,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-11-16 08:01:36,217 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2024-11-16 08:01:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:36,217 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-11-16 08:01:36,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-16 08:01:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-11-16 08:01:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-16 08:01:36,218 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:36,219 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:36,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 08:01:36,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:36,421 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:36,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:36,421 INFO L85 PathProgramCache]: Analyzing trace with hash 102575976, now seen corresponding path program 3 times [2024-11-16 08:01:36,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:36,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857956390] [2024-11-16 08:01:36,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:36,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:36,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:37,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:37,366 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:37,466 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 08:01:37,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:37,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857956390] [2024-11-16 08:01:37,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857956390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:37,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467197554] [2024-11-16 08:01:37,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 08:01:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:37,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:37,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:01:37,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 08:01:37,634 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 08:01:37,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:01:37,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-16 08:01:37,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:37,696 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 23 treesize of output 19 [2024-11-16 08:01:37,775 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 23 treesize of output 19 [2024-11-16 08:01:37,815 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 08:01:38,010 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 23 treesize of output 3 [2024-11-16 08:01:38,044 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 29 treesize of output 21 [2024-11-16 08:01:38,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-16 08:01:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-16 08:01:38,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:38,537 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 80 treesize of output 68 [2024-11-16 08:01:38,547 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 68 treesize of output 56 [2024-11-16 08:01:38,975 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 30 treesize of output 26 [2024-11-16 08:01:39,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467197554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:39,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:01:39,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2024-11-16 08:01:39,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270434628] [2024-11-16 08:01:39,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:39,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 08:01:39,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:39,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 08:01:39,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-11-16 08:01:39,050 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 22 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-16 08:01:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:39,220 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-11-16 08:01:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 08:01:39,221 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 22 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 27 [2024-11-16 08:01:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:39,221 INFO L225 Difference]: With dead ends: 31 [2024-11-16 08:01:39,221 INFO L226 Difference]: Without dead ends: 26 [2024-11-16 08:01:39,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2024-11-16 08:01:39,223 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:39,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 65 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-16 08:01:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-16 08:01:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 08:01:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-11-16 08:01:39,229 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2024-11-16 08:01:39,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:39,230 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-11-16 08:01:39,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 22 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-16 08:01:39,230 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-11-16 08:01:39,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-16 08:01:39,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:39,231 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:39,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 08:01:39,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:39,432 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:39,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:39,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1858119512, now seen corresponding path program 4 times [2024-11-16 08:01:39,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:39,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668008548] [2024-11-16 08:01:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:39,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:39,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:40,482 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:40,868 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:41,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:41,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-16 08:01:41,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:41,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668008548] [2024-11-16 08:01:41,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668008548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:41,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454510785] [2024-11-16 08:01:41,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 08:01:41,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:41,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:41,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:01:41,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 08:01:41,483 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 08:01:41,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:01:41,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-16 08:01:41,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:41,559 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 23 treesize of output 19 [2024-11-16 08:01:41,630 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 23 treesize of output 19 [2024-11-16 08:01:41,662 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 23 treesize of output 19 [2024-11-16 08:01:41,697 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 08:01:41,917 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 23 treesize of output 3 [2024-11-16 08:01:41,950 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 36 treesize of output 24 [2024-11-16 08:01:41,951 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 28 treesize of output 16 [2024-11-16 08:01:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-16 08:01:41,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:42,534 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 137 treesize of output 121 [2024-11-16 08:01:42,539 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 121 treesize of output 105 [2024-11-16 08:01:42,544 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 105 treesize of output 89 [2024-11-16 08:01:43,241 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 59 treesize of output 55 [2024-11-16 08:01:43,247 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 53 treesize of output 49 [2024-11-16 08:01:43,257 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 80 treesize of output 76 [2024-11-16 08:01:43,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454510785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:43,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:01:43,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2024-11-16 08:01:43,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169953825] [2024-11-16 08:01:43,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:43,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 08:01:43,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 08:01:43,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2024-11-16 08:01:43,711 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-16 08:01:43,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:43,919 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-11-16 08:01:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 08:01:43,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 31 [2024-11-16 08:01:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:43,920 INFO L225 Difference]: With dead ends: 32 [2024-11-16 08:01:43,921 INFO L226 Difference]: Without dead ends: 30 [2024-11-16 08:01:43,921 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2024-11-16 08:01:43,922 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:43,922 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 120 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-16 08:01:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-16 08:01:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 6 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-16 08:01:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-11-16 08:01:43,927 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 31 [2024-11-16 08:01:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:43,927 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-11-16 08:01:43,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-16 08:01:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-11-16 08:01:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 08:01:43,928 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:43,928 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:43,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 08:01:44,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:44,129 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:44,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:44,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1767131736, now seen corresponding path program 4 times [2024-11-16 08:01:44,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:44,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738199278] [2024-11-16 08:01:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:44,596 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:44,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:45,281 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:45,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:45,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 08:01:45,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:45,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738199278] [2024-11-16 08:01:45,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738199278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:45,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335261070] [2024-11-16 08:01:45,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 08:01:45,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:45,561 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:01:45,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 08:01:45,715 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 08:01:45,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:01:45,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-16 08:01:45,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:45,745 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 23 treesize of output 19 [2024-11-16 08:01:45,788 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 23 treesize of output 19 [2024-11-16 08:01:45,812 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 23 treesize of output 19 [2024-11-16 08:01:45,839 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 23 treesize of output 19 [2024-11-16 08:01:46,056 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 23 treesize of output 3 [2024-11-16 08:01:46,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-16 08:01:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-16 08:01:46,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:46,345 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 38 treesize of output 34 [2024-11-16 08:01:46,356 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 101 treesize of output 89 [2024-11-16 08:01:46,377 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 328 treesize of output 280 [2024-11-16 08:01:46,386 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 280 treesize of output 232 [2024-11-16 08:01:47,340 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 43 treesize of output 39 [2024-11-16 08:01:47,345 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 37 treesize of output 33 [2024-11-16 08:01:47,351 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 31 treesize of output 27 [2024-11-16 08:01:47,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335261070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:47,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:01:47,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 21 [2024-11-16 08:01:47,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53091848] [2024-11-16 08:01:47,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:47,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-16 08:01:47,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:47,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-16 08:01:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2024-11-16 08:01:47,418 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 20 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 9 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-16 08:01:47,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:47,509 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-11-16 08:01:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 08:01:47,509 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 20 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 9 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 32 [2024-11-16 08:01:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:47,510 INFO L225 Difference]: With dead ends: 33 [2024-11-16 08:01:47,510 INFO L226 Difference]: Without dead ends: 28 [2024-11-16 08:01:47,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2024-11-16 08:01:47,511 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:47,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 78 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-16 08:01:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-16 08:01:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-16 08:01:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2024-11-16 08:01:47,517 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32 [2024-11-16 08:01:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:47,517 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2024-11-16 08:01:47,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 20 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 9 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-16 08:01:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2024-11-16 08:01:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-16 08:01:47,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:47,518 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:47,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-16 08:01:47,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-16 08:01:47,718 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:47,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:47,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1420387712, now seen corresponding path program 5 times [2024-11-16 08:01:47,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:47,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307732267] [2024-11-16 08:01:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:47,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:48,477 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:49,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:49,640 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:49,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:50,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:50,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-16 08:01:50,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:50,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307732267] [2024-11-16 08:01:50,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307732267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:50,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073689654] [2024-11-16 08:01:50,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 08:01:50,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:50,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:50,377 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:01:50,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 08:01:50,673 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 08:01:50,673 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:01:50,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-16 08:01:50,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:50,738 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 23 treesize of output 19 [2024-11-16 08:01:50,802 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 23 treesize of output 19 [2024-11-16 08:01:50,828 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 23 treesize of output 19 [2024-11-16 08:01:50,862 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 23 treesize of output 19 [2024-11-16 08:01:50,889 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 08:01:51,165 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 23 treesize of output 3 [2024-11-16 08:01:51,203 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 36 treesize of output 24 [2024-11-16 08:01:51,209 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 28 treesize of output 16 [2024-11-16 08:01:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-16 08:01:51,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:51,843 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 165 treesize of output 149 [2024-11-16 08:01:51,847 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 149 treesize of output 133 [2024-11-16 08:01:51,850 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 133 treesize of output 117 [2024-11-16 08:01:51,853 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 117 treesize of output 101 [2024-11-16 08:01:52,834 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 66 treesize of output 62 [2024-11-16 08:01:52,842 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 60 treesize of output 56 [2024-11-16 08:01:52,850 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 54 treesize of output 50 [2024-11-16 08:01:52,858 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 82 treesize of output 78 [2024-11-16 08:01:53,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073689654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:53,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:01:53,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2024-11-16 08:01:53,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161879271] [2024-11-16 08:01:53,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:53,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-16 08:01:53,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:53,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-16 08:01:53,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2024-11-16 08:01:53,253 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 11 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-16 08:01:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:53,421 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2024-11-16 08:01:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 08:01:53,422 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 11 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) Word has length 36 [2024-11-16 08:01:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:53,423 INFO L225 Difference]: With dead ends: 34 [2024-11-16 08:01:53,423 INFO L226 Difference]: Without dead ends: 32 [2024-11-16 08:01:53,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2024-11-16 08:01:53,427 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:53,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 87 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-16 08:01:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-16 08:01:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 7 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-16 08:01:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-11-16 08:01:53,434 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 36 [2024-11-16 08:01:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:53,436 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-11-16 08:01:53,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 11 states have return successors, (12), 12 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-16 08:01:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-11-16 08:01:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-16 08:01:53,438 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:53,439 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:53,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-16 08:01:53,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:53,639 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:53,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1082347824, now seen corresponding path program 5 times [2024-11-16 08:01:53,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:53,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354239434] [2024-11-16 08:01:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:53,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:54,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:54,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:55,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:55,297 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:55,439 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:55,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-16 08:01:55,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:01:55,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354239434] [2024-11-16 08:01:55,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354239434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:55,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022935421] [2024-11-16 08:01:55,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 08:01:55,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:01:55,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:01:55,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:01:55,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 08:01:55,799 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 08:01:55,799 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:01:55,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-16 08:01:55,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:01:55,828 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 23 treesize of output 19 [2024-11-16 08:01:55,870 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 23 treesize of output 19 [2024-11-16 08:01:55,891 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 23 treesize of output 19 [2024-11-16 08:01:55,907 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 23 treesize of output 19 [2024-11-16 08:01:55,922 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 23 treesize of output 19 [2024-11-16 08:01:56,086 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 23 treesize of output 3 [2024-11-16 08:01:56,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-16 08:01:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-16 08:01:56,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:01:56,474 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 45 treesize of output 41 [2024-11-16 08:01:56,485 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 122 treesize of output 110 [2024-11-16 08:01:56,509 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 412 treesize of output 364 [2024-11-16 08:01:56,518 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 364 treesize of output 316 [2024-11-16 08:01:56,527 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 316 treesize of output 268 [2024-11-16 08:01:57,422 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 50 treesize of output 46 [2024-11-16 08:01:57,427 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 44 treesize of output 40 [2024-11-16 08:01:57,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-16 08:01:57,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-11-16 08:01:57,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022935421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:01:57,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:01:57,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2024-11-16 08:01:57,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499881730] [2024-11-16 08:01:57,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:01:57,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-16 08:01:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:01:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-16 08:01:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2024-11-16 08:01:57,508 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 25 states, 20 states have (on average 1.55) internal successors, (31), 23 states have internal predecessors, (31), 6 states have call successors, (6), 2 states have call predecessors, (6), 11 states have return successors, (12), 12 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-16 08:01:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:01:57,595 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2024-11-16 08:01:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-16 08:01:57,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.55) internal successors, (31), 23 states have internal predecessors, (31), 6 states have call successors, (6), 2 states have call predecessors, (6), 11 states have return successors, (12), 12 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2024-11-16 08:01:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:01:57,596 INFO L225 Difference]: With dead ends: 35 [2024-11-16 08:01:57,596 INFO L226 Difference]: Without dead ends: 30 [2024-11-16 08:01:57,597 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2024-11-16 08:01:57,597 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:01:57,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:01:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-16 08:01:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-16 08:01:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-16 08:01:57,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-11-16 08:01:57,602 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-11-16 08:01:57,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:01:57,603 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-11-16 08:01:57,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.55) internal successors, (31), 23 states have internal predecessors, (31), 6 states have call successors, (6), 2 states have call predecessors, (6), 11 states have return successors, (12), 12 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-16 08:01:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-11-16 08:01:57,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-16 08:01:57,603 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:01:57,603 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:01:57,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-16 08:01:57,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-16 08:01:57,804 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:01:57,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:01:57,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1817711216, now seen corresponding path program 6 times [2024-11-16 08:01:57,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:01:57,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936966133] [2024-11-16 08:01:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:01:57,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:01:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:58,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:01:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:59,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:01:59,829 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:01:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:00,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:00,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:00,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:00,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-16 08:02:00,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:02:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936966133] [2024-11-16 08:02:00,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936966133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771341287] [2024-11-16 08:02:00,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 08:02:00,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:02:00,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:02:00,790 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:02:00,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 08:02:01,453 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-16 08:02:01,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:02:01,460 WARN L253 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 309 conjuncts are in the unsatisfiable core [2024-11-16 08:02:01,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:02:01,604 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 23 treesize of output 19 [2024-11-16 08:02:01,734 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 23 treesize of output 19 [2024-11-16 08:02:01,861 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 23 treesize of output 19 [2024-11-16 08:02:01,941 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 13 [2024-11-16 08:02:02,061 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 23 treesize of output 19 [2024-11-16 08:02:06,223 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 23 treesize of output 19 [2024-11-16 08:02:06,305 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 08:02:07,483 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 23 treesize of output 3 [2024-11-16 08:02:07,546 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 36 treesize of output 24 [2024-11-16 08:02:07,548 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 28 treesize of output 16 [2024-11-16 08:02:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 58 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 08:02:07,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:02:10,217 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 37 treesize of output 29 [2024-11-16 08:02:10,233 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 193 treesize of output 177 [2024-11-16 08:02:10,239 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 177 treesize of output 161 [2024-11-16 08:02:10,244 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 161 treesize of output 145 [2024-11-16 08:02:10,249 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 145 treesize of output 129 [2024-11-16 08:02:10,254 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 129 treesize of output 113 [2024-11-16 08:02:12,888 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 73 treesize of output 69 [2024-11-16 08:02:12,894 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 67 treesize of output 63 [2024-11-16 08:02:12,900 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 61 treesize of output 57 [2024-11-16 08:02:12,906 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 55 treesize of output 51 [2024-11-16 08:02:12,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2024-11-16 08:02:13,428 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 37 treesize of output 29 [2024-11-16 08:02:13,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771341287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:13,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:02:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24] total 40 [2024-11-16 08:02:13,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986772330] [2024-11-16 08:02:13,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:02:13,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-16 08:02:13,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:02:13,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-16 08:02:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1777, Unknown=1, NotChecked=0, Total=1980 [2024-11-16 08:02:13,763 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 34 states have internal predecessors, (40), 9 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (14), 14 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-16 08:02:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:02:14,670 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2024-11-16 08:02:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 08:02:14,671 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 34 states have internal predecessors, (40), 9 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (14), 14 states have call predecessors, (14), 9 states have call successors, (14) Word has length 41 [2024-11-16 08:02:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:02:14,671 INFO L225 Difference]: With dead ends: 36 [2024-11-16 08:02:14,672 INFO L226 Difference]: Without dead ends: 34 [2024-11-16 08:02:14,673 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=320, Invalid=2541, Unknown=1, NotChecked=0, Total=2862 [2024-11-16 08:02:14,674 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-16 08:02:14,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-16 08:02:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-16 08:02:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-16 08:02:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 8 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-16 08:02:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2024-11-16 08:02:14,682 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 41 [2024-11-16 08:02:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:02:14,682 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2024-11-16 08:02:14,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 34 states have internal predecessors, (40), 9 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (14), 14 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-16 08:02:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2024-11-16 08:02:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-16 08:02:14,683 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:02:14,683 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:02:14,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-16 08:02:14,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-16 08:02:14,884 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:02:14,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:02:14,884 INFO L85 PathProgramCache]: Analyzing trace with hash -514471136, now seen corresponding path program 6 times [2024-11-16 08:02:14,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:02:14,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832831296] [2024-11-16 08:02:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:02:14,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:02:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:15,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:02:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:15,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:16,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:16,457 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:16,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:16,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:16,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-16 08:02:16,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:02:16,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832831296] [2024-11-16 08:02:16,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832831296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:16,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181981376] [2024-11-16 08:02:16,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 08:02:16,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:02:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:02:16,805 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:02:16,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 08:02:17,138 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-16 08:02:17,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:02:17,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-16 08:02:17,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:02:17,195 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 23 treesize of output 19 [2024-11-16 08:02:17,251 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 23 treesize of output 19 [2024-11-16 08:02:17,293 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 23 treesize of output 19 [2024-11-16 08:02:17,327 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 23 treesize of output 19 [2024-11-16 08:02:17,359 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 23 treesize of output 19 [2024-11-16 08:02:17,397 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 08:02:17,652 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 23 treesize of output 3 [2024-11-16 08:02:17,676 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 29 treesize of output 21 [2024-11-16 08:02:17,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-16 08:02:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-16 08:02:17,702 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:02:18,616 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 143 treesize of output 131 [2024-11-16 08:02:18,620 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 131 treesize of output 119 [2024-11-16 08:02:18,626 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 119 treesize of output 107 [2024-11-16 08:02:18,696 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 352 treesize of output 304 [2024-11-16 08:02:18,704 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 304 treesize of output 256 [2024-11-16 08:02:20,138 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 51 treesize of output 47 [2024-11-16 08:02:20,141 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 45 treesize of output 41 [2024-11-16 08:02:20,145 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 39 treesize of output 35 [2024-11-16 08:02:20,150 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 33 treesize of output 29 [2024-11-16 08:02:20,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181981376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:20,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:02:20,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2024-11-16 08:02:20,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422577703] [2024-11-16 08:02:20,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:02:20,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-16 08:02:20,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:02:20,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-16 08:02:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2024-11-16 08:02:20,274 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 28 states have internal predecessors, (36), 6 states have call successors, (6), 3 states have call predecessors, (6), 14 states have return successors, (14), 14 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-16 08:02:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:02:20,530 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-11-16 08:02:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 08:02:20,530 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 28 states have internal predecessors, (36), 6 states have call successors, (6), 3 states have call predecessors, (6), 14 states have return successors, (14), 14 states have call predecessors, (14), 6 states have call successors, (14) Word has length 42 [2024-11-16 08:02:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:02:20,531 INFO L225 Difference]: With dead ends: 37 [2024-11-16 08:02:20,534 INFO L226 Difference]: Without dead ends: 32 [2024-11-16 08:02:20,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=1372, Unknown=0, NotChecked=0, Total=1722 [2024-11-16 08:02:20,535 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:02:20,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 82 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:02:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-16 08:02:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-16 08:02:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-16 08:02:20,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-11-16 08:02:20,544 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 42 [2024-11-16 08:02:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:02:20,545 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-11-16 08:02:20,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 28 states have internal predecessors, (36), 6 states have call successors, (6), 3 states have call predecessors, (6), 14 states have return successors, (14), 14 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-16 08:02:20,545 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-11-16 08:02:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-16 08:02:20,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:02:20,547 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:02:20,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-16 08:02:20,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-16 08:02:20,748 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:02:20,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:02:20,748 INFO L85 PathProgramCache]: Analyzing trace with hash 733228728, now seen corresponding path program 7 times [2024-11-16 08:02:20,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:02:20,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784553035] [2024-11-16 08:02:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:02:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:02:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:21,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:02:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:22,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:22,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:23,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:23,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:23,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:24,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:24,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 17 proven. 63 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-16 08:02:24,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:02:24,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784553035] [2024-11-16 08:02:24,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784553035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:24,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809425113] [2024-11-16 08:02:24,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 08:02:24,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:02:24,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:02:24,309 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:02:24,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 08:02:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:24,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 239 conjuncts are in the unsatisfiable core [2024-11-16 08:02:24,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:02:24,836 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 23 treesize of output 19 [2024-11-16 08:02:24,938 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 23 treesize of output 19 [2024-11-16 08:02:24,984 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 23 treesize of output 19 [2024-11-16 08:02:25,029 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 23 treesize of output 19 [2024-11-16 08:02:25,095 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 23 treesize of output 19 [2024-11-16 08:02:25,169 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 23 treesize of output 19 [2024-11-16 08:02:25,195 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 08:02:25,523 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 23 treesize of output 3 [2024-11-16 08:02:25,555 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 36 treesize of output 24 [2024-11-16 08:02:25,556 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 28 treesize of output 16 [2024-11-16 08:02:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 3 proven. 107 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-16 08:02:25,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:02:26,893 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 221 treesize of output 205 [2024-11-16 08:02:26,896 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 205 treesize of output 189 [2024-11-16 08:02:26,899 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 189 treesize of output 173 [2024-11-16 08:02:26,903 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 173 treesize of output 157 [2024-11-16 08:02:26,906 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 157 treesize of output 141 [2024-11-16 08:02:26,908 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 141 treesize of output 125 [2024-11-16 08:02:28,585 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 80 treesize of output 76 [2024-11-16 08:02:28,590 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 74 treesize of output 70 [2024-11-16 08:02:28,594 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 68 treesize of output 64 [2024-11-16 08:02:28,599 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 62 treesize of output 58 [2024-11-16 08:02:28,605 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 56 treesize of output 52 [2024-11-16 08:02:28,612 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 86 treesize of output 82 [2024-11-16 08:02:29,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809425113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:29,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:02:29,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 35 [2024-11-16 08:02:29,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772570362] [2024-11-16 08:02:29,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:02:29,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-16 08:02:29,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:02:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-16 08:02:29,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2024-11-16 08:02:29,338 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 35 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 8 states have call successors, (9), 4 states have call predecessors, (9), 15 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-16 08:02:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:02:29,589 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2024-11-16 08:02:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-16 08:02:29,590 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 8 states have call successors, (9), 4 states have call predecessors, (9), 15 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) Word has length 46 [2024-11-16 08:02:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:02:29,590 INFO L225 Difference]: With dead ends: 38 [2024-11-16 08:02:29,590 INFO L226 Difference]: Without dead ends: 36 [2024-11-16 08:02:29,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2024-11-16 08:02:29,591 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:02:29,592 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 143 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 08:02:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-16 08:02:29,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-16 08:02:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 9 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-16 08:02:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-11-16 08:02:29,601 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 46 [2024-11-16 08:02:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:02:29,602 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-11-16 08:02:29,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 8 states have call successors, (9), 4 states have call predecessors, (9), 15 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) [2024-11-16 08:02:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-11-16 08:02:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-16 08:02:29,602 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:02:29,603 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:02:29,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-16 08:02:29,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-16 08:02:29,803 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:02:29,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:02:29,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1255255800, now seen corresponding path program 7 times [2024-11-16 08:02:29,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:02:29,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477058426] [2024-11-16 08:02:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:02:29,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:02:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:30,494 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-16 08:02:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:31,038 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:31,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:31,979 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:32,212 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:32,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:32,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:32,664 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:02:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-16 08:02:32,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:02:32,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477058426] [2024-11-16 08:02:32,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477058426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:02:32,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372901936] [2024-11-16 08:02:32,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 08:02:32,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:02:32,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:02:32,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:02:32,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 08:02:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:02:32,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-16 08:02:32,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:02:32,998 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 23 treesize of output 19 [2024-11-16 08:02:33,029 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 23 treesize of output 19 [2024-11-16 08:02:33,049 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 23 treesize of output 19 [2024-11-16 08:02:33,071 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 23 treesize of output 19 [2024-11-16 08:02:33,087 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 23 treesize of output 19 [2024-11-16 08:02:33,103 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 23 treesize of output 19 [2024-11-16 08:02:33,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-11-16 08:02:33,336 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 23 treesize of output 3 [2024-11-16 08:02:33,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-16 08:02:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-16 08:02:33,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:02:33,830 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 59 treesize of output 55 [2024-11-16 08:02:33,846 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 164 treesize of output 152 [2024-11-16 08:02:33,854 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 152 treesize of output 140 [2024-11-16 08:02:33,864 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 140 treesize of output 128 [2024-11-16 08:02:33,875 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 128 treesize of output 116 [2024-11-16 08:02:33,939 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 104 treesize of output 92 [2024-11-16 08:02:33,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80