./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.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 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 23:27:43,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 23:27:43,250 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 23:27:43,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 23:27:43,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 23:27:43,284 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 23:27:43,286 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 23:27:43,286 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 23:27:43,287 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 23:27:43,289 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 23:27:43,289 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 23:27:43,290 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 23:27:43,290 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 23:27:43,292 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 23:27:43,292 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 23:27:43,293 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 23:27:43,293 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 23:27:43,293 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 23:27:43,294 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 23:27:43,294 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 23:27:43,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 23:27:43,297 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 23:27:43,297 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 23:27:43,298 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 23:27:43,298 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 23:27:43,298 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 23:27:43,298 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 23:27:43,299 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 23:27:43,299 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 23:27:43,299 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 23:27:43,300 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 23:27:43,300 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 23:27:43,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 23:27:43,301 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 23:27:43,302 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 23:27:43,302 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 23:27:43,303 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 23:27:43,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 23:27:43,303 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 23:27:43,304 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 23:27:43,304 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 23:27:43,304 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 23:27:43,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 [2024-11-09 23:27:43,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 23:27:43,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 23:27:43,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 23:27:43,573 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 23:27:43,574 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 23:27:43,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-11-09 23:27:45,012 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 23:27:45,201 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 23:27:45,201 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-11-09 23:27:45,209 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6fe7607d/27a7330616634e0b88579e1bfaa1b206/FLAG26875a75e [2024-11-09 23:27:45,587 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6fe7607d/27a7330616634e0b88579e1bfaa1b206 [2024-11-09 23:27:45,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 23:27:45,591 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 23:27:45,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 23:27:45,593 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 23:27:45,598 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 23:27:45,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed6c24c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45, skipping insertion in model container [2024-11-09 23:27:45,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,620 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 23:27:45,795 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c[1105,1118] [2024-11-09 23:27:45,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 23:27:45,833 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 23:27:45,845 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c[1105,1118] [2024-11-09 23:27:45,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 23:27:45,882 INFO L204 MainTranslator]: Completed translation [2024-11-09 23:27:45,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45 WrapperNode [2024-11-09 23:27:45,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 23:27:45,884 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 23:27:45,884 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 23:27:45,884 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 23:27:45,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,904 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,923 INFO L138 Inliner]: procedures = 16, calls = 57, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2024-11-09 23:27:45,924 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 23:27:45,925 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 23:27:45,925 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 23:27:45,925 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 23:27:45,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,939 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,962 INFO L175 MemorySlicer]: Split 31 memory accesses to 6 slices as follows [2, 5, 7, 7, 5, 5]. 23 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 1, 3, 3, 1, 2]. [2024-11-09 23:27:45,963 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,966 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,974 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,975 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,980 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,981 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 23:27:45,989 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 23:27:45,989 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 23:27:45,989 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 23:27:45,990 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (1/1) ... [2024-11-09 23:27:45,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 23:27:46,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:27:46,027 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) [2024-11-09 23:27:46,031 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 [2024-11-09 23:27:46,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 23:27:46,077 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 23:27:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 23:27:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 23:27:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 23:27:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 23:27:46,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-09 23:27:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-09 23:27:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-09 23:27:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 23:27:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 23:27:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 23:27:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 23:27:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-09 23:27:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-09 23:27:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-09 23:27:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_42_0 [2024-11-09 23:27:46,082 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_42_0 [2024-11-09 23:27:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 23:27:46,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 23:27:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 23:27:46,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 23:27:46,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 23:27:46,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-09 23:27:46,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-09 23:27:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-09 23:27:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 23:27:46,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 23:27:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 23:27:46,187 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 23:27:46,189 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 23:27:46,398 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L86: call ULTIMATE.dealloc(main_~#x1~0#1.base, main_~#x1~0#1.offset);havoc main_~#x1~0#1.base, main_~#x1~0#1.offset;call ULTIMATE.dealloc(main_~#x2~0#1.base, main_~#x2~0#1.offset);havoc main_~#x2~0#1.base, main_~#x2~0#1.offset;call ULTIMATE.dealloc(main_~#y1~0#1.base, main_~#y1~0#1.offset);havoc main_~#y1~0#1.base, main_~#y1~0#1.offset;call ULTIMATE.dealloc(main_~#y2~0#1.base, main_~#y2~0#1.offset);havoc main_~#y2~0#1.base, main_~#y2~0#1.offset;call ULTIMATE.dealloc(main_~#y3~0#1.base, main_~#y3~0#1.offset);havoc main_~#y3~0#1.base, main_~#y3~0#1.offset; [2024-11-09 23:27:46,430 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-09 23:27:46,431 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 23:27:46,448 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 23:27:46,448 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 23:27:46,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 11:27:46 BoogieIcfgContainer [2024-11-09 23:27:46,449 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 23:27:46,451 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 23:27:46,451 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 23:27:46,455 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 23:27:46,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 11:27:45" (1/3) ... [2024-11-09 23:27:46,456 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695ddfb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 11:27:46, skipping insertion in model container [2024-11-09 23:27:46,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 11:27:45" (2/3) ... [2024-11-09 23:27:46,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695ddfb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 11:27:46, skipping insertion in model container [2024-11-09 23:27:46,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 11:27:46" (3/3) ... [2024-11-09 23:27:46,460 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_mannadiv.c [2024-11-09 23:27:46,497 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 23:27:46,497 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 23:27:46,597 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 23:27:46,605 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;@6f8bea40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 23:27:46,605 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 23:27:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 23:27:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 23:27:46,618 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:27:46,619 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:27:46,619 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:27:46,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:27:46,624 INFO L85 PathProgramCache]: Analyzing trace with hash -359143117, now seen corresponding path program 1 times [2024-11-09 23:27:46,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:27:46,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091424462] [2024-11-09 23:27:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:27:46,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:27:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:27:46,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:27:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:27:46,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 23:27:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:27:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 23:27:46,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:27:46,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091424462] [2024-11-09 23:27:46,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091424462] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 23:27:46,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 23:27:46,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 23:27:46,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989073421] [2024-11-09 23:27:46,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 23:27:46,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 23:27:46,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:27:46,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 23:27:46,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 23:27:46,901 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 23:27:46,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:27:46,922 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2024-11-09 23:27:46,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 23:27:46,924 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-09 23:27:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:27:46,931 INFO L225 Difference]: With dead ends: 63 [2024-11-09 23:27:46,931 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 23:27:46,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 23:27:46,936 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 23:27:46,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 23:27:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 23:27:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 23:27:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 23:27:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-09 23:27:46,968 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2024-11-09 23:27:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:27:46,968 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-09 23:27:46,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 23:27:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-09 23:27:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 23:27:46,970 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:27:46,970 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:27:46,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 23:27:46,971 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:27:46,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:27:46,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1227132751, now seen corresponding path program 1 times [2024-11-09 23:27:46,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:27:46,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575859500] [2024-11-09 23:27:46,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:27:46,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:27:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:27:47,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005198283] [2024-11-09 23:27:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:27:47,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:27:47,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:27:47,079 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) [2024-11-09 23:27:47,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 23:27:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:27:47,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 23:27:47,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:27:47,263 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 [2024-11-09 23:27:47,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 23:27:47,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:27:47,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:27:47,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:27:47,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 23:27:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 23:27:47,538 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 23:27:47,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:27:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575859500] [2024-11-09 23:27:47,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:27:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005198283] [2024-11-09 23:27:47,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005198283] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 23:27:47,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 23:27:47,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 23:27:47,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998619697] [2024-11-09 23:27:47,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 23:27:47,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 23:27:47,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:27:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 23:27:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-09 23:27:47,543 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 23:27:47,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:27:47,748 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-11-09 23:27:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 23:27:47,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-09 23:27:47,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:27:47,751 INFO L225 Difference]: With dead ends: 45 [2024-11-09 23:27:47,751 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 23:27:47,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 23:27:47,753 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 23:27:47,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 142 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 23:27:47,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 23:27:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-11-09 23:27:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 23:27:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-11-09 23:27:47,764 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2024-11-09 23:27:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:27:47,764 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-11-09 23:27:47,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 23:27:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-11-09 23:27:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 23:27:47,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:27:47,766 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:27:47,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 23:27:47,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:27:47,971 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:27:47,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:27:47,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1127702810, now seen corresponding path program 1 times [2024-11-09 23:27:47,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:27:47,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121988905] [2024-11-09 23:27:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:27:47,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:27:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:27:48,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070046089] [2024-11-09 23:27:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:27:48,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:27:48,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:27:48,050 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) [2024-11-09 23:27:48,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 23:27:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:27:48,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 23:27:48,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:27:48,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:27:48,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:27:48,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 23:27:48,260 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 [2024-11-09 23:27:48,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 23:27:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 23:27:48,515 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 23:27:48,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:27:48,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121988905] [2024-11-09 23:27:48,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:27:48,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070046089] [2024-11-09 23:27:48,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070046089] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 23:27:48,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 23:27:48,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-09 23:27:48,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022007080] [2024-11-09 23:27:48,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 23:27:48,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 23:27:48,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:27:48,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 23:27:48,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-09 23:27:48,520 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 23:27:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:27:48,838 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2024-11-09 23:27:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 23:27:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2024-11-09 23:27:48,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:27:48,841 INFO L225 Difference]: With dead ends: 51 [2024-11-09 23:27:48,842 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 23:27:48,842 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-11-09 23:27:48,843 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 23:27:48,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 79 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 23:27:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 23:27:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 23:27:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 23:27:48,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-11-09 23:27:48,851 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2024-11-09 23:27:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:27:48,852 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-11-09 23:27:48,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 23:27:48,852 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-11-09 23:27:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 23:27:48,853 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:27:48,853 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:27:48,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 23:27:49,056 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,SelfDestructingSolverStorable2 [2024-11-09 23:27:49,057 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:27:49,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:27:49,058 INFO L85 PathProgramCache]: Analyzing trace with hash 281670508, now seen corresponding path program 1 times [2024-11-09 23:27:49,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:27:49,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637559908] [2024-11-09 23:27:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:27:49,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:27:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:27:49,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374465259] [2024-11-09 23:27:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:27:49,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:27:49,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:27:49,133 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) [2024-11-09 23:27:49,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 23:27:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:27:49,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-09 23:27:49,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:27:49,259 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 [2024-11-09 23:27:49,261 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 [2024-11-09 23:27:49,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:27:49,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:27:49,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 23:27:49,509 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 29 treesize of output 17 [2024-11-09 23:27:49,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:27:49,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:27:49,623 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 [2024-11-09 23:27:49,627 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 [2024-11-09 23:27:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 23:27:49,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:27:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 23:27:50,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:27:50,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637559908] [2024-11-09 23:27:50,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:27:50,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374465259] [2024-11-09 23:27:50,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374465259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:27:50,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 23:27:50,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-11-09 23:27:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099961274] [2024-11-09 23:27:50,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 23:27:50,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 23:27:50,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:27:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 23:27:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-09 23:27:50,028 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 19 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 23:27:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:27:50,786 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2024-11-09 23:27:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 23:27:50,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2024-11-09 23:27:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:27:50,790 INFO L225 Difference]: With dead ends: 62 [2024-11-09 23:27:50,790 INFO L226 Difference]: Without dead ends: 57 [2024-11-09 23:27:50,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-11-09 23:27:50,791 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 23:27:50,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 233 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 23:27:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-09 23:27:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-11-09 23:27:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-09 23:27:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-09 23:27:50,811 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 33 [2024-11-09 23:27:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:27:50,811 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-09 23:27:50,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 23:27:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-09 23:27:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 23:27:50,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:27:50,813 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:27:50,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 23:27:51,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:27:51,018 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:27:51,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:27:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1407738556, now seen corresponding path program 1 times [2024-11-09 23:27:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:27:51,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378119869] [2024-11-09 23:27:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:27:51,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:27:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:27:51,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991915178] [2024-11-09 23:27:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:27:51,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:27:51,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:27:51,059 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) [2024-11-09 23:27:51,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 23:27:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:27:51,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-11-09 23:27:51,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:27:51,195 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 [2024-11-09 23:27:51,198 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 [2024-11-09 23:27:51,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:27:51,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:27:51,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 23:27:51,300 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 [2024-11-09 23:27:51,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 23:27:52,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:27:52,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 23:27:52,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:27:52,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-09 23:27:52,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 23:27:52,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 56 [2024-11-09 23:27:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 23:27:52,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:27:53,834 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 36 treesize of output 28 [2024-11-09 23:27:54,372 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 28 [2024-11-09 23:27:54,480 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 69 treesize of output 61 [2024-11-09 23:27:54,489 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 [2024-11-09 23:27:54,498 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 57 treesize of output 53 [2024-11-09 23:27:58,529 WARN L851 $PredicateComparison]: unable to prove that (and (or (< (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|) (+ (* (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|) (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|) |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|) |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|) 1)) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_4| Int)) (= (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_4|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_4|) (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_4|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_4|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_4|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_4|))) (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_4|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_4|)))) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_4| Int)) (let ((.cse0 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_4|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_4|)) (.cse1 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_4|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_4|))) (or (= (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_4|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_4|) (* .cse0 (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_4|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_4|))) .cse1) (not (= (+ (* .cse0 (select (select |c_old(#memory_int#5)| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_4|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_4|)) (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_4|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_4|)) .cse1)))))) is different from false [2024-11-09 23:27:58,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:27:58,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378119869] [2024-11-09 23:27:58,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:27:58,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991915178] [2024-11-09 23:27:58,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991915178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:27:58,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:27:58,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-09 23:27:58,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685240471] [2024-11-09 23:27:58,968 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:27:58,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 23:27:58,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:27:58,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 23:27:58,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1011, Unknown=1, NotChecked=64, Total=1190 [2024-11-09 23:27:58,973 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 26 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 23:28:02,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 23:28:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:04,379 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2024-11-09 23:28:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 23:28:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 45 [2024-11-09 23:28:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:04,382 INFO L225 Difference]: With dead ends: 67 [2024-11-09 23:28:04,382 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 23:28:04,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=232, Invalid=2027, Unknown=1, NotChecked=92, Total=2352 [2024-11-09 23:28:04,384 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 15 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:04,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 112 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 530 Invalid, 5 Unknown, 0 Unchecked, 4.6s Time] [2024-11-09 23:28:04,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 23:28:04,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-09 23:28:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-09 23:28:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2024-11-09 23:28:04,399 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 45 [2024-11-09 23:28:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:04,399 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2024-11-09 23:28:04,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 23:28:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2024-11-09 23:28:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 23:28:04,401 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:04,401 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:04,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 23:28:04,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:04,604 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:04,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1619089469, now seen corresponding path program 1 times [2024-11-09 23:28:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:04,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008849953] [2024-11-09 23:28:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:04,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:04,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776080722] [2024-11-09 23:28:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:04,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:04,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:04,654 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) [2024-11-09 23:28:04,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 23:28:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:04,762 WARN L253 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-11-09 23:28:04,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:04,776 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 [2024-11-09 23:28:04,778 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 [2024-11-09 23:28:04,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:04,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:04,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 23:28:04,865 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 [2024-11-09 23:28:06,032 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 46 treesize of output 30 [2024-11-09 23:28:06,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:06,121 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 23:28:06,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 56 [2024-11-09 23:28:06,138 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 7 treesize of output 3 [2024-11-09 23:28:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 23:28:06,221 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:28:07,940 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 69 treesize of output 61 [2024-11-09 23:28:07,946 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 53 [2024-11-09 23:28:07,954 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 41 [2024-11-09 23:28:11,986 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_8| Int)) (= (+ (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_8|)) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_8|)) (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_8|)))) (.cse1 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|))) (and (or .cse0 (< .cse1 1)) (or .cse0 (< (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|) (+ (* (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|) (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|) |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|) |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|) .cse1 1))) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_8| Int)) (let ((.cse2 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_8|)) (.cse3 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_8|))) (or (not (= (+ (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_8|) (* .cse2 (select (select |c_old(#memory_int#5)| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_8|))) .cse3)) (= (+ (* .cse2 (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_8|)) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_8|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_8|)) .cse3)))))) is different from false [2024-11-09 23:28:13,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:13,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008849953] [2024-11-09 23:28:13,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:13,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776080722] [2024-11-09 23:28:13,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776080722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:28:13,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:28:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-09 23:28:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606901396] [2024-11-09 23:28:13,741 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:28:13,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 23:28:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 23:28:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=890, Unknown=1, NotChecked=60, Total=1056 [2024-11-09 23:28:13,743 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 23:28:17,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 23:28:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:18,931 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2024-11-09 23:28:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 23:28:18,932 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 45 [2024-11-09 23:28:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:18,933 INFO L225 Difference]: With dead ends: 65 [2024-11-09 23:28:18,933 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 23:28:18,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=208, Invalid=1865, Unknown=1, NotChecked=88, Total=2162 [2024-11-09 23:28:18,935 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:18,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 111 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 488 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-11-09 23:28:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 23:28:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2024-11-09 23:28:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-09 23:28:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2024-11-09 23:28:18,953 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 45 [2024-11-09 23:28:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:18,953 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2024-11-09 23:28:18,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 23:28:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2024-11-09 23:28:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-09 23:28:18,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:18,954 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:18,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 23:28:19,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:19,155 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:19,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:19,155 INFO L85 PathProgramCache]: Analyzing trace with hash -82018149, now seen corresponding path program 1 times [2024-11-09 23:28:19,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:19,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653929794] [2024-11-09 23:28:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:19,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:19,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849029650] [2024-11-09 23:28:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:19,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:19,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:19,214 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) [2024-11-09 23:28:19,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 23:28:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:19,334 WARN L253 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 206 conjuncts are in the unsatisfiable core [2024-11-09 23:28:19,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:19,344 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 [2024-11-09 23:28:19,346 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 [2024-11-09 23:28:19,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 23:28:19,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:19,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:19,371 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 [2024-11-09 23:28:19,691 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 14 treesize of output 10 [2024-11-09 23:28:20,026 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 [2024-11-09 23:28:20,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:20,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:20,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 23:28:20,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:28:24,156 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 60 [2024-11-09 23:28:24,165 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 [2024-11-09 23:28:24,171 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 [2024-11-09 23:28:28,213 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|))) (let ((.cse4 (select .cse3 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) (.cse2 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|)) (.cse5 (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|)) (.cse6 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_14| Int)) (= (+ (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_14|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_14|)) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_14|)) (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14|))))) (and (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_14| Int)) (let ((.cse0 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_14|)) (.cse1 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14|))) (or (= (+ (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_14|) .cse0) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_14|)) .cse1) (not (= (+ (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse2 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| 0)) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_14|) (* .cse0 (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base| (store .cse3 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset| (+ .cse4 1))) |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_14|))) .cse1))))) (or (< (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|) (+ (* .cse5 .cse4) .cse5 1)) .cse6) (or (< 0 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|)) .cse6) (or (= (+ (select .cse2 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|) 1) .cse5) .cse6)))) is different from false [2024-11-09 23:28:29,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653929794] [2024-11-09 23:28:29,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849029650] [2024-11-09 23:28:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849029650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:28:29,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:28:29,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-09 23:28:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278680479] [2024-11-09 23:28:29,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:28:29,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 23:28:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 23:28:29,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=587, Unknown=1, NotChecked=48, Total=702 [2024-11-09 23:28:29,853 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 20 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 23:28:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:31,516 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-11-09 23:28:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 23:28:31,516 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2024-11-09 23:28:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:31,517 INFO L225 Difference]: With dead ends: 67 [2024-11-09 23:28:31,517 INFO L226 Difference]: Without dead ends: 60 [2024-11-09 23:28:31,518 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=127, Invalid=1136, Unknown=1, NotChecked=68, Total=1332 [2024-11-09 23:28:31,518 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:31,519 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 146 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 23:28:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-09 23:28:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2024-11-09 23:28:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-09 23:28:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2024-11-09 23:28:31,531 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 58 [2024-11-09 23:28:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:31,531 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2024-11-09 23:28:31,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 23:28:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2024-11-09 23:28:31,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-09 23:28:31,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:31,533 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:31,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 23:28:31,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:31,733 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:31,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:31,734 INFO L85 PathProgramCache]: Analyzing trace with hash 137254333, now seen corresponding path program 2 times [2024-11-09 23:28:31,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:31,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133481807] [2024-11-09 23:28:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:31,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:32,342 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:28:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:32,345 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-09 23:28:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:32,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-09 23:28:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:32,947 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:28:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:32,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-09 23:28:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:33,462 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:28:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:33,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-09 23:28:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:33,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 23:28:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 23:28:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 23:28:33,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:33,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133481807] [2024-11-09 23:28:33,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133481807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:28:33,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793718807] [2024-11-09 23:28:33,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 23:28:33,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:33,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:33,613 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) [2024-11-09 23:28:33,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 23:28:33,766 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 23:28:33,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:28:33,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-09 23:28:33,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:33,777 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 [2024-11-09 23:28:33,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:33,965 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 13 treesize of output 9 [2024-11-09 23:28:34,085 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 14 treesize of output 10 [2024-11-09 23:28:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 23:28:34,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:28:34,578 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 [2024-11-09 23:28:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 23:28:35,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793718807] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 23:28:35,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 23:28:35,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 12] total 34 [2024-11-09 23:28:35,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625162213] [2024-11-09 23:28:35,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 23:28:35,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 23:28:35,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:35,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 23:28:35,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 23:28:35,039 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 34 states, 25 states have (on average 2.28) internal successors, (57), 30 states have internal predecessors, (57), 16 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (18), 12 states have call predecessors, (18), 15 states have call successors, (18) [2024-11-09 23:28:36,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:36,502 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2024-11-09 23:28:36,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 23:28:36,503 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 25 states have (on average 2.28) internal successors, (57), 30 states have internal predecessors, (57), 16 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (18), 12 states have call predecessors, (18), 15 states have call successors, (18) Word has length 58 [2024-11-09 23:28:36,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:36,504 INFO L225 Difference]: With dead ends: 76 [2024-11-09 23:28:36,504 INFO L226 Difference]: Without dead ends: 67 [2024-11-09 23:28:36,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 23:28:36,505 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:36,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 183 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 23:28:36,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-09 23:28:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2024-11-09 23:28:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 10 states have call successors, (10), 8 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2024-11-09 23:28:36,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2024-11-09 23:28:36,531 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 58 [2024-11-09 23:28:36,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:36,531 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2024-11-09 23:28:36,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 25 states have (on average 2.28) internal successors, (57), 30 states have internal predecessors, (57), 16 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (18), 12 states have call predecessors, (18), 15 states have call successors, (18) [2024-11-09 23:28:36,531 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2024-11-09 23:28:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-09 23:28:36,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:36,533 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:36,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 23:28:36,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:36,733 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:36,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1162746332, now seen corresponding path program 2 times [2024-11-09 23:28:36,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:36,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534323893] [2024-11-09 23:28:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:36,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:36,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388046354] [2024-11-09 23:28:36,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 23:28:36,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:36,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:36,761 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) [2024-11-09 23:28:36,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 23:28:36,917 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 23:28:36,917 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:28:36,920 WARN L253 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 200 conjuncts are in the unsatisfiable core [2024-11-09 23:28:36,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:36,929 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 [2024-11-09 23:28:36,931 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 [2024-11-09 23:28:36,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:36,943 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 [2024-11-09 23:28:36,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:36,964 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 [2024-11-09 23:28:38,151 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 [2024-11-09 23:28:38,195 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 7 treesize of output 3 [2024-11-09 23:28:38,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-11-09 23:28:38,203 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 22 treesize of output 10 [2024-11-09 23:28:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 23:28:38,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:28:41,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534323893] [2024-11-09 23:28:41,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388046354] [2024-11-09 23:28:41,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388046354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:28:41,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:28:41,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-09 23:28:41,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514911395] [2024-11-09 23:28:41,870 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:28:41,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 23:28:41,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 23:28:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2024-11-09 23:28:41,872 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 23:28:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:42,995 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2024-11-09 23:28:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 23:28:42,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2024-11-09 23:28:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:42,998 INFO L225 Difference]: With dead ends: 73 [2024-11-09 23:28:42,998 INFO L226 Difference]: Without dead ends: 66 [2024-11-09 23:28:42,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 23:28:43,001 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:43,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 129 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 23:28:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-09 23:28:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-11-09 23:28:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 10 states have call successors, (10), 8 states have call predecessors, (10), 11 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22) [2024-11-09 23:28:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2024-11-09 23:28:43,023 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 58 [2024-11-09 23:28:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:43,023 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2024-11-09 23:28:43,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 23:28:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2024-11-09 23:28:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 23:28:43,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:43,028 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:43,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 23:28:43,228 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,SelfDestructingSolverStorable8 [2024-11-09 23:28:43,229 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:43,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1731558067, now seen corresponding path program 3 times [2024-11-09 23:28:43,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:43,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138639259] [2024-11-09 23:28:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:43,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:43,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080499552] [2024-11-09 23:28:43,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 23:28:43,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:43,262 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) [2024-11-09 23:28:43,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 23:28:43,469 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 23:28:43,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:28:43,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-09 23:28:43,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:43,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:43,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 23:28:43,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:43,571 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 [2024-11-09 23:28:44,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-09 23:28:44,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:28:45,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:45,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138639259] [2024-11-09 23:28:45,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:45,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080499552] [2024-11-09 23:28:45,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080499552] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:28:45,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:28:45,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-09 23:28:45,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861019778] [2024-11-09 23:28:45,669 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:28:45,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 23:28:45,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 23:28:45,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2024-11-09 23:28:45,671 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 20 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 23:28:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:46,395 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2024-11-09 23:28:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 23:28:46,396 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 71 [2024-11-09 23:28:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:46,397 INFO L225 Difference]: With dead ends: 75 [2024-11-09 23:28:46,397 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 23:28:46,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2024-11-09 23:28:46,398 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:46,399 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 157 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 23:28:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 23:28:46,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2024-11-09 23:28:46,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 10 states have call successors, (10), 8 states have call predecessors, (10), 12 states have return successors, (24), 13 states have call predecessors, (24), 9 states have call successors, (24) [2024-11-09 23:28:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2024-11-09 23:28:46,416 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 71 [2024-11-09 23:28:46,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:46,416 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2024-11-09 23:28:46,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 23:28:46,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2024-11-09 23:28:46,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 23:28:46,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:46,418 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:46,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 23:28:46,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 23:28:46,619 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:46,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2072971730, now seen corresponding path program 4 times [2024-11-09 23:28:46,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:46,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408746354] [2024-11-09 23:28:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:46,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:46,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795273933] [2024-11-09 23:28:46,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 23:28:46,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:46,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:46,668 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) [2024-11-09 23:28:46,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 23:28:46,868 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 23:28:46,868 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:28:46,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-11-09 23:28:46,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:46,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:46,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:46,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 23:28:46,946 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 [2024-11-09 23:28:48,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 23:28:48,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 23:28:48,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2024-11-09 23:28:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 3 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 23:28:48,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:28:50,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 23:28:50,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408746354] [2024-11-09 23:28:50,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 23:28:50,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795273933] [2024-11-09 23:28:50,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795273933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 23:28:50,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 23:28:50,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-09 23:28:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237910395] [2024-11-09 23:28:50,838 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 23:28:50,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 23:28:50,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 23:28:50,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 23:28:50,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-11-09 23:28:50,839 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-09 23:28:54,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 23:28:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 23:28:55,848 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2024-11-09 23:28:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 23:28:55,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 84 [2024-11-09 23:28:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 23:28:55,850 INFO L225 Difference]: With dead ends: 77 [2024-11-09 23:28:55,850 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 23:28:55,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 23:28:55,851 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-09 23:28:55,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 168 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 524 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-11-09 23:28:55,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 23:28:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-11-09 23:28:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 8 states have call predecessors, (10), 13 states have return successors, (26), 14 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-09 23:28:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2024-11-09 23:28:55,875 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 84 [2024-11-09 23:28:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 23:28:55,875 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2024-11-09 23:28:55,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-09 23:28:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2024-11-09 23:28:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-09 23:28:55,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 23:28:55,876 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 23:28:55,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 23:28:56,076 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,SelfDestructingSolverStorable10 [2024-11-09 23:28:56,077 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 23:28:56,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 23:28:56,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1107510148, now seen corresponding path program 2 times [2024-11-09 23:28:56,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 23:28:56,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515795057] [2024-11-09 23:28:56,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 23:28:56,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 23:28:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 23:28:56,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339965620] [2024-11-09 23:28:56,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 23:28:56,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 23:28:56,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 23:28:56,101 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) [2024-11-09 23:28:56,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 23:28:56,294 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 23:28:56,294 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 23:28:56,297 WARN L253 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 200 conjuncts are in the unsatisfiable core [2024-11-09 23:28:56,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 23:28:56,304 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 [2024-11-09 23:28:56,306 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 [2024-11-09 23:28:56,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 23:28:56,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:56,325 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 [2024-11-09 23:28:56,344 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 [2024-11-09 23:28:56,734 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 13 treesize of output 9 [2024-11-09 23:28:56,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 23:28:57,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 23:28:57,596 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 13 [2024-11-09 23:28:57,655 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 [2024-11-09 23:28:57,658 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 24 treesize of output 12 [2024-11-09 23:28:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 23:28:57,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 23:29:01,450 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 [2024-11-09 23:29:01,652 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 72 treesize of output 64 [2024-11-09 23:29:01,662 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 64 treesize of output 60 [2024-11-09 23:29:01,673 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