./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_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-wip.fs.cvc5-61a6796-m [2024-10-14 03:19:41,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 03:19:41,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 03:19:41,853 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 03:19:41,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 03:19:41,873 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 03:19:41,874 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 03:19:41,875 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 03:19:41,876 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 03:19:41,876 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 03:19:41,877 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 03:19:41,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 03:19:41,877 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 03:19:41,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 03:19:41,879 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 03:19:41,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 03:19:41,880 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 03:19:41,880 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 03:19:41,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 03:19:41,880 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 03:19:41,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 03:19:41,881 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 03:19:41,881 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 03:19:41,881 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 03:19:41,882 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 03:19:41,882 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 03:19:41,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 03:19:41,882 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 03:19:41,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 03:19:41,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 03:19:41,883 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 03:19:41,883 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 03:19:41,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 03:19:41,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 03:19:41,884 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 03:19:41,884 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 03:19:41,885 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 03:19:41,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 03:19:41,885 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 03:19:41,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 03:19:41,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 03:19:41,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 03:19:41,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 [2024-10-14 03:19:42,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 03:19:42,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 03:19:42,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 03:19:42,130 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 03:19:42,131 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 03:19:42,132 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-10-14 03:19:43,348 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 03:19:43,476 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 03:19:43,477 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-10-14 03:19:43,483 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94263f4de/ff8ac63facab42648f59be0be8d21296/FLAG636e4a29c [2024-10-14 03:19:43,902 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94263f4de/ff8ac63facab42648f59be0be8d21296 [2024-10-14 03:19:43,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 03:19:43,904 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 03:19:43,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 03:19:43,905 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 03:19:43,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 03:19:43,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:19:43" (1/1) ... [2024-10-14 03:19:43,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f33d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:43, skipping insertion in model container [2024-10-14 03:19:43,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 03:19:43" (1/1) ... [2024-10-14 03:19:43,929 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 03:19:44,045 WARN L248 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] [2024-10-14 03:19:44,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 03:19:44,079 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 03:19:44,090 WARN L248 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] [2024-10-14 03:19:44,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 03:19:44,112 INFO L204 MainTranslator]: Completed translation [2024-10-14 03:19:44,112 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44 WrapperNode [2024-10-14 03:19:44,112 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 03:19:44,113 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 03:19:44,114 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 03:19:44,116 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 03:19:44,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,138 INFO L138 Inliner]: procedures = 16, calls = 57, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2024-10-14 03:19:44,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 03:19:44,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 03:19:44,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 03:19:44,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 03:19:44,146 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,148 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,159 INFO L175 MemorySlicer]: Split 31 memory accesses to 6 slices as follows [2, 5, 7, 5, 7, 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, 2, 3, 1, 3, 1]. [2024-10-14 03:19:44,159 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,160 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,164 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,166 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,170 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 03:19:44,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 03:19:44,170 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 03:19:44,170 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 03:19:44,171 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (1/1) ... [2024-10-14 03:19:44,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 03:19:44,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:19:44,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 03:19:44,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 03:19:44,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 03:19:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-14 03:19:44,237 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-14 03:19:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 03:19:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 03:19:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 03:19:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-14 03:19:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-14 03:19:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-14 03:19:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 03:19:44,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 03:19:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 03:19:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 03:19:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-14 03:19:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-14 03:19:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-14 03:19:44,238 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_42_0 [2024-10-14 03:19:44,239 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_42_0 [2024-10-14 03:19:44,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 03:19:44,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 03:19:44,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 03:19:44,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 03:19:44,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 03:19:44,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-14 03:19:44,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-14 03:19:44,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-14 03:19:44,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-14 03:19:44,241 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-14 03:19:44,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 03:19:44,326 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 03:19:44,328 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 03:19:44,496 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-10-14 03:19:44,496 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 03:19:44,530 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 03:19:44,530 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-14 03:19:44,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:19:44 BoogieIcfgContainer [2024-10-14 03:19:44,530 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 03:19:44,532 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 03:19:44,533 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 03:19:44,535 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 03:19:44,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 03:19:43" (1/3) ... [2024-10-14 03:19:44,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346ec0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:19:44, skipping insertion in model container [2024-10-14 03:19:44,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 03:19:44" (2/3) ... [2024-10-14 03:19:44,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346ec0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 03:19:44, skipping insertion in model container [2024-10-14 03:19:44,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 03:19:44" (3/3) ... [2024-10-14 03:19:44,538 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_mannadiv.c [2024-10-14 03:19:44,553 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 03:19:44,553 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 03:19:44,607 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 03:19:44,614 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;@7cde52b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 03:19:44,615 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 03:19:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 states have internal predecessors, (24), 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) [2024-10-14 03:19:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-14 03:19:44,624 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:19:44,624 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:19:44,625 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:19:44,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:19:44,630 INFO L85 PathProgramCache]: Analyzing trace with hash 432807151, now seen corresponding path program 1 times [2024-10-14 03:19:44,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:19:44,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652310487] [2024-10-14 03:19:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:44,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:19:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:44,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:19:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:44,820 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 03:19:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 03:19:44,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:19:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652310487] [2024-10-14 03:19:44,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652310487] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:19:44,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:19:44,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 03:19:44,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478042655] [2024-10-14 03:19:44,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:19:44,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 03:19:44,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:19:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 03:19:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 03:19:44,861 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 states have internal predecessors, (24), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-10-14 03:19:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:19:44,885 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2024-10-14 03:19:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 03:19:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 20 [2024-10-14 03:19:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:19:44,892 INFO L225 Difference]: With dead ends: 56 [2024-10-14 03:19:44,893 INFO L226 Difference]: Without dead ends: 27 [2024-10-14 03:19:44,897 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 [2024-10-14 03:19:44,919 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 03:19:44,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 03:19:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-14 03:19:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-14 03:19:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 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) [2024-10-14 03:19:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-10-14 03:19:44,976 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2024-10-14 03:19:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:19:44,976 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-10-14 03:19:44,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-10-14 03:19:44,977 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-10-14 03:19:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-14 03:19:44,978 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:19:44,978 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:19:44,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 03:19:44,979 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:19:44,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:19:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash -454476173, now seen corresponding path program 1 times [2024-10-14 03:19:44,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:19:44,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795194442] [2024-10-14 03:19:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:44,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:19:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:19:45,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006533535] [2024-10-14 03:19:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:45,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:19:45,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:19:45,052 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:19:45,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 03:19:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:45,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-14 03:19:45,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:19:45,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:19:45,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:45,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:19:45,261 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 11 treesize of output 7 [2024-10-14 03:19:45,371 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 19 treesize of output 11 [2024-10-14 03:19:45,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-14 03:19:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 03:19:45,429 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 03:19:45,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:19:45,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795194442] [2024-10-14 03:19:45,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:19:45,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006533535] [2024-10-14 03:19:45,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006533535] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:19:45,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:19:45,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 03:19:45,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751576098] [2024-10-14 03:19:45,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:19:45,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 03:19:45,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:19:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 03:19:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-14 03:19:45,435 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2024-10-14 03:19:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:19:45,599 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-10-14 03:19:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 03:19:45,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 20 [2024-10-14 03:19:45,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:19:45,601 INFO L225 Difference]: With dead ends: 42 [2024-10-14 03:19:45,601 INFO L226 Difference]: Without dead ends: 40 [2024-10-14 03:19:45,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-14 03:19:45,602 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:19:45,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 03:19:45,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-14 03:19:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2024-10-14 03:19:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 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) [2024-10-14 03:19:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-10-14 03:19:45,616 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 20 [2024-10-14 03:19:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:19:45,617 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-10-14 03:19:45,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2024-10-14 03:19:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-10-14 03:19:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-14 03:19:45,618 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:19:45,618 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] [2024-10-14 03:19:45,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 03:19:45,821 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 [2024-10-14 03:19:45,822 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:19:45,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:19:45,822 INFO L85 PathProgramCache]: Analyzing trace with hash 443267008, now seen corresponding path program 1 times [2024-10-14 03:19:45,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:19:45,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501612274] [2024-10-14 03:19:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:45,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:19:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:19:45,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501186459] [2024-10-14 03:19:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:45,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:19:45,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:19:45,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:19:45,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 03:19:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:45,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-14 03:19:45,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:19:45,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:19:45,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:45,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:45,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:46,149 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 [2024-10-14 03:19:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 03:19:46,179 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 03:19:46,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:19:46,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501612274] [2024-10-14 03:19:46,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:19:46,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501186459] [2024-10-14 03:19:46,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501186459] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 03:19:46,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 03:19:46,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-14 03:19:46,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198409250] [2024-10-14 03:19:46,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 03:19:46,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 03:19:46,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:19:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 03:19:46,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-14 03:19:46,182 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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) [2024-10-14 03:19:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:19:46,424 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-10-14 03:19:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 03:19:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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 30 [2024-10-14 03:19:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:19:46,426 INFO L225 Difference]: With dead ends: 48 [2024-10-14 03:19:46,426 INFO L226 Difference]: Without dead ends: 38 [2024-10-14 03:19:46,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-10-14 03:19:46,427 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 03:19:46,427 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 03:19:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-14 03:19:46,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-14 03:19:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 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) [2024-10-14 03:19:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-10-14 03:19:46,437 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2024-10-14 03:19:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:19:46,438 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-10-14 03:19:46,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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) [2024-10-14 03:19:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-10-14 03:19:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 03:19:46,439 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:19:46,439 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] [2024-10-14 03:19:46,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 03:19:46,639 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 [2024-10-14 03:19:46,640 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:19:46,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:19:46,640 INFO L85 PathProgramCache]: Analyzing trace with hash -746539634, now seen corresponding path program 1 times [2024-10-14 03:19:46,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:19:46,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930422518] [2024-10-14 03:19:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:46,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:19:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:19:46,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601254463] [2024-10-14 03:19:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:46,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:19:46,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:19:46,694 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:19:46,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 03:19:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:46,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-10-14 03:19:46,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:19:46,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:19:46,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:19:46,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:46,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:19:46,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:46,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:19:46,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:19:47,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-10-14 03:19:47,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 03:19:47,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-14 03:19:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 03:19:47,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:19:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 03:19:47,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:19:47,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930422518] [2024-10-14 03:19:47,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:19:47,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601254463] [2024-10-14 03:19:47,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601254463] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:19:47,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 03:19:47,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-10-14 03:19:47,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008946774] [2024-10-14 03:19:47,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 03:19:47,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 03:19:47,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:19:47,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 03:19:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-10-14 03:19:47,451 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 19 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 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) [2024-10-14 03:19:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:19:48,021 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2024-10-14 03:19:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 03:19:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 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 31 [2024-10-14 03:19:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:19:48,023 INFO L225 Difference]: With dead ends: 59 [2024-10-14 03:19:48,023 INFO L226 Difference]: Without dead ends: 55 [2024-10-14 03:19:48,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-10-14 03:19:48,024 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 03:19:48,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 181 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 03:19:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-14 03:19:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-10-14 03:19:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 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) [2024-10-14 03:19:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-10-14 03:19:48,034 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 31 [2024-10-14 03:19:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:19:48,034 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-10-14 03:19:48,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 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) [2024-10-14 03:19:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-10-14 03:19:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 03:19:48,035 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:19:48,035 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] [2024-10-14 03:19:48,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 03:19:48,236 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 [2024-10-14 03:19:48,236 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:19:48,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:19:48,237 INFO L85 PathProgramCache]: Analyzing trace with hash 230239702, now seen corresponding path program 1 times [2024-10-14 03:19:48,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:19:48,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148468494] [2024-10-14 03:19:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:48,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:19:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:19:48,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095745264] [2024-10-14 03:19:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:48,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:19:48,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:19:48,283 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:19:48,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 03:19:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:48,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-10-14 03:19:48,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:19:48,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:19:48,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:19:48,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:48,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:48,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:48,663 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 [2024-10-14 03:19:48,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:19:48,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:19:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 03:19:48,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:19:49,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:19:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148468494] [2024-10-14 03:19:49,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:19:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095745264] [2024-10-14 03:19:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095745264] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:19:49,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:19:49,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-14 03:19:49,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474892445] [2024-10-14 03:19:49,671 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:19:49,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 03:19:49,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:19:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 03:19:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-10-14 03:19:49,672 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 15 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 03:19:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:19:50,177 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2024-10-14 03:19:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 03:19:50,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2024-10-14 03:19:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:19:50,179 INFO L225 Difference]: With dead ends: 60 [2024-10-14 03:19:50,179 INFO L226 Difference]: Without dead ends: 50 [2024-10-14 03:19:50,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2024-10-14 03:19:50,181 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 03:19:50,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 67 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 03:19:50,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-14 03:19:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-14 03:19:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2024-10-14 03:19:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-10-14 03:19:50,189 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 43 [2024-10-14 03:19:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:19:50,189 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-10-14 03:19:50,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 03:19:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-10-14 03:19:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 03:19:50,190 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:19:50,190 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] [2024-10-14 03:19:50,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 03:19:50,391 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 [2024-10-14 03:19:50,391 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:19:50,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:19:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash -587408748, now seen corresponding path program 1 times [2024-10-14 03:19:50,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:19:50,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640345719] [2024-10-14 03:19:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:50,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:19:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:19:50,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753229517] [2024-10-14 03:19:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:50,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:19:50,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:19:50,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:19:50,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 03:19:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:50,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-14 03:19:50,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:19:50,527 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 11 treesize of output 7 [2024-10-14 03:19:50,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:50,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:19:50,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:50,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:19:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 03:19:50,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:19:51,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:19:51,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640345719] [2024-10-14 03:19:51,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:19:51,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753229517] [2024-10-14 03:19:51,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753229517] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:19:51,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:19:51,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-10-14 03:19:51,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125352359] [2024-10-14 03:19:51,115 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:19:51,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 03:19:51,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:19:51,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 03:19:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2024-10-14 03:19:51,116 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 14 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 03:19:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:19:51,401 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-10-14 03:19:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 03:19:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2024-10-14 03:19:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:19:51,402 INFO L225 Difference]: With dead ends: 58 [2024-10-14 03:19:51,402 INFO L226 Difference]: Without dead ends: 52 [2024-10-14 03:19:51,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-10-14 03:19:51,403 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 03:19:51,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 72 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 03:19:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-14 03:19:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-10-14 03:19:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-10-14 03:19:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-10-14 03:19:51,415 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 43 [2024-10-14 03:19:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:19:51,415 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-10-14 03:19:51,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 03:19:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-10-14 03:19:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-14 03:19:51,417 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:19:51,417 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] [2024-10-14 03:19:51,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 03:19:51,618 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 [2024-10-14 03:19:51,618 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:19:51,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:19:51,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1603601130, now seen corresponding path program 2 times [2024-10-14 03:19:51,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:19:51,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970833806] [2024-10-14 03:19:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:51,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:19:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:19:51,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165178379] [2024-10-14 03:19:51,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:19:51,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:19:51,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:19:51,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:19:51,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 03:19:51,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 03:19:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:19:51,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-10-14 03:19:51,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:19:51,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:19:51,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:19:51,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 20 [2024-10-14 03:19:51,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:51,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:51,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:19:51,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:52,113 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 [2024-10-14 03:19:52,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:52,498 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 7 treesize of output 3 [2024-10-14 03:19:52,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2024-10-14 03:19:52,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:19:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 03:19:52,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:19:53,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2024-10-14 03:19:53,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2024-10-14 03:19:53,719 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 [2024-10-14 03:19:53,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:19:53,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970833806] [2024-10-14 03:19:53,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:19:53,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165178379] [2024-10-14 03:19:53,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165178379] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:19:53,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:19:53,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-10-14 03:19:53,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101601286] [2024-10-14 03:19:53,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:19:53,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 03:19:53,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:19:53,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 03:19:53,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2024-10-14 03:19:53,881 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 8 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 03:19:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:19:54,496 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2024-10-14 03:19:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 03:19:54,497 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 8 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2024-10-14 03:19:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:19:54,498 INFO L225 Difference]: With dead ends: 60 [2024-10-14 03:19:54,498 INFO L226 Difference]: Without dead ends: 54 [2024-10-14 03:19:54,501 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2024-10-14 03:19:54,501 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 03:19:54,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 102 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 03:19:54,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-14 03:19:54,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-10-14 03:19:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2024-10-14 03:19:54,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2024-10-14 03:19:54,510 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 56 [2024-10-14 03:19:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:19:54,510 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2024-10-14 03:19:54,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 8 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 03:19:54,511 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2024-10-14 03:19:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-14 03:19:54,511 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:19:54,512 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] [2024-10-14 03:19:54,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 03:19:54,712 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 [2024-10-14 03:19:54,713 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:19:54,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:19:54,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1457132970, now seen corresponding path program 2 times [2024-10-14 03:19:54,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:19:54,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621061915] [2024-10-14 03:19:54,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:54,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:19:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:19:54,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377629229] [2024-10-14 03:19:54,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:19:54,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:19:54,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:19:54,745 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:19:54,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 03:19:54,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 03:19:54,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:19:54,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-10-14 03:19:54,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:19:54,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:19:54,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:54,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:54,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:55,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:19:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-14 03:19:55,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:19:55,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:19:55,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621061915] [2024-10-14 03:19:55,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:19:55,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377629229] [2024-10-14 03:19:55,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377629229] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:19:55,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:19:55,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-14 03:19:55,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942195020] [2024-10-14 03:19:55,636 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:19:55,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 03:19:55,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:19:55,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 03:19:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2024-10-14 03:19:55,637 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-14 03:19:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:19:56,021 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-10-14 03:19:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 03:19:56,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 56 [2024-10-14 03:19:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:19:56,023 INFO L225 Difference]: With dead ends: 62 [2024-10-14 03:19:56,024 INFO L226 Difference]: Without dead ends: 56 [2024-10-14 03:19:56,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-10-14 03:19:56,025 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 03:19:56,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 89 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 03:19:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-14 03:19:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-10-14 03:19:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2024-10-14 03:19:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2024-10-14 03:19:56,038 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 56 [2024-10-14 03:19:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:19:56,038 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2024-10-14 03:19:56,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-14 03:19:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2024-10-14 03:19:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-14 03:19:56,039 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:19:56,040 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] [2024-10-14 03:19:56,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 03:19:56,240 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 [2024-10-14 03:19:56,240 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:19:56,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:19:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1384746412, now seen corresponding path program 1 times [2024-10-14 03:19:56,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:19:56,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913248954] [2024-10-14 03:19:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:56,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:19:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:56,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:19:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:56,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 03:19:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:56,625 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 03:19:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:57,054 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:19:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:57,060 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 03:19:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:57,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:19:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:57,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 03:19:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:57,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:19:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-14 03:19:57,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:19:57,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913248954] [2024-10-14 03:19:57,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913248954] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:19:57,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331045167] [2024-10-14 03:19:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:57,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:19:57,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:19:57,477 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:19:57,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 03:19:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:19:57,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-14 03:19:57,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:19:57,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:19:57,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:57,703 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 [2024-10-14 03:19:57,784 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 [2024-10-14 03:19:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 03:19:57,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:19:58,075 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 [2024-10-14 03:19:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 03:19:58,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331045167] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:19:58,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:19:58,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 12] total 34 [2024-10-14 03:19:58,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796476427] [2024-10-14 03:19:58,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:19:58,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-14 03:19:58,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:19:58,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-14 03:19:58,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 03:19:58,345 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 34 states, 25 states have (on average 2.2) internal successors, (55), 30 states have internal predecessors, (55), 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) [2024-10-14 03:19:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:19:59,304 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2024-10-14 03:19:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 03:19:59,304 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 25 states have (on average 2.2) internal successors, (55), 30 states have internal predecessors, (55), 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 56 [2024-10-14 03:19:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:19:59,305 INFO L225 Difference]: With dead ends: 73 [2024-10-14 03:19:59,305 INFO L226 Difference]: Without dead ends: 65 [2024-10-14 03:19:59,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2024-10-14 03:19:59,306 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 03:19:59,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 172 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 03:19:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-14 03:19:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2024-10-14 03:19:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 10 states have call successors, (10), 7 states have call predecessors, (10), 11 states have return successors, (24), 13 states have call predecessors, (24), 9 states have call successors, (24) [2024-10-14 03:19:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-10-14 03:19:59,324 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 56 [2024-10-14 03:19:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:19:59,324 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-10-14 03:19:59,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 25 states have (on average 2.2) internal successors, (55), 30 states have internal predecessors, (55), 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) [2024-10-14 03:19:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-10-14 03:19:59,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-14 03:19:59,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:19:59,325 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] [2024-10-14 03:19:59,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 03:19:59,525 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 [2024-10-14 03:19:59,526 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:19:59,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:19:59,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1628557930, now seen corresponding path program 3 times [2024-10-14 03:19:59,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:19:59,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170616174] [2024-10-14 03:19:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:19:59,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:19:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:19:59,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827490359] [2024-10-14 03:19:59,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 03:19:59,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:19:59,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:19:59,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:19:59,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 03:19:59,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 03:19:59,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:19:59,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-10-14 03:19:59,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:19:59,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:19:59,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:59,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:19:59,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:00,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:20:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-10-14 03:20:00,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:20:00,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:20:00,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170616174] [2024-10-14 03:20:00,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:20:00,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827490359] [2024-10-14 03:20:00,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827490359] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:20:00,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:20:00,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-14 03:20:00,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290044878] [2024-10-14 03:20:00,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:20:00,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 03:20:00,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:20:00,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 03:20:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2024-10-14 03:20:00,975 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 20 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 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) [2024-10-14 03:20:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:20:01,385 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2024-10-14 03:20:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 03:20:01,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 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 69 [2024-10-14 03:20:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:20:01,387 INFO L225 Difference]: With dead ends: 68 [2024-10-14 03:20:01,387 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 03:20:01,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2024-10-14 03:20:01,388 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 03:20:01,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 110 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 03:20:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 03:20:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-14 03:20:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 12 states have return successors, (26), 14 states have call predecessors, (26), 9 states have call successors, (26) [2024-10-14 03:20:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2024-10-14 03:20:01,400 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 69 [2024-10-14 03:20:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:20:01,400 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2024-10-14 03:20:01,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 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) [2024-10-14 03:20:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2024-10-14 03:20:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-14 03:20:01,401 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:20:01,401 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] [2024-10-14 03:20:01,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 03:20:01,601 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 [2024-10-14 03:20:01,602 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:20:01,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:20:01,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1986243052, now seen corresponding path program 4 times [2024-10-14 03:20:01,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:20:01,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716704587] [2024-10-14 03:20:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:20:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:20:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:20:01,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046704366] [2024-10-14 03:20:01,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 03:20:01,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:20:01,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:20:01,639 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:20:01,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 03:20:01,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 03:20:01,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:20:01,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-10-14 03:20:01,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:20:01,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:20:01,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:01,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:01,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:02,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:20:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-10-14 03:20:02,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:20:03,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:20:03,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716704587] [2024-10-14 03:20:03,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:20:03,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046704366] [2024-10-14 03:20:03,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046704366] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:20:03,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:20:03,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-10-14 03:20:03,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830208812] [2024-10-14 03:20:03,054 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:20:03,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 03:20:03,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:20:03,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 03:20:03,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-10-14 03:20:03,055 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-14 03:20:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:20:03,477 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-10-14 03:20:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 03:20:03,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 82 [2024-10-14 03:20:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:20:03,479 INFO L225 Difference]: With dead ends: 70 [2024-10-14 03:20:03,479 INFO L226 Difference]: Without dead ends: 64 [2024-10-14 03:20:03,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2024-10-14 03:20:03,480 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 03:20:03,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 130 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 03:20:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-14 03:20:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-14 03:20:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 10 states have call successors, (10), 7 states have call predecessors, (10), 13 states have return successors, (28), 15 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-14 03:20:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2024-10-14 03:20:03,502 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 82 [2024-10-14 03:20:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:20:03,503 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2024-10-14 03:20:03,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-14 03:20:03,503 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2024-10-14 03:20:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-14 03:20:03,504 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:20:03,504 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] [2024-10-14 03:20:03,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 03:20:03,705 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 [2024-10-14 03:20:03,705 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:20:03,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:20:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1675987688, now seen corresponding path program 2 times [2024-10-14 03:20:03,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:20:03,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397288025] [2024-10-14 03:20:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:20:03,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:20:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:20:03,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259007937] [2024-10-14 03:20:03,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 03:20:03,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:20:03,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:20:03,730 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:20:03,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 03:20:03,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 03:20:03,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:20:03,858 WARN L253 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-10-14 03:20:03,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:20:03,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:20:03,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:20:03,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2024-10-14 03:20:03,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:03,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:03,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:20:03,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:04,400 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 [2024-10-14 03:20:04,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:20:04,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:20:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-14 03:20:04,919 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:20:07,767 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 [2024-10-14 03:20:07,774 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 [2024-10-14 03:20:07,780 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 [2024-10-14 03:20:11,832 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|))) (let ((.cse2 (select .cse4 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) (.cse0 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_40| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_40| Int)) (= (+ (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_20|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_18|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_40|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_40|)) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_6|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_6|)))) (.cse5 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|)) (.cse1 (select (select |c_#memory_int#5| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|))) (and (or (= (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|) 1) .cse0) (or (< (+ .cse1 (* .cse2 .cse1)) (+ 1 (select (select |c_#memory_int#3| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|))) .cse0) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_40| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_40| Int)) (let ((.cse3 (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_20|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_18|)) (.cse6 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_6|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_6|))) (or (not (= (+ (* .cse3 (select (select (store |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base| (store .cse4 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset| (+ .cse2 1))) |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12|)) (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse5 |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_40|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_40|)) .cse6)) (= (+ (* .cse3 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_40|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_40|)) .cse6)))) (or .cse0 (< (select .cse5 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|) .cse1))))) is different from false [2024-10-14 03:20:12,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:20:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397288025] [2024-10-14 03:20:12,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:20:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259007937] [2024-10-14 03:20:12,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259007937] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:20:12,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:20:12,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-14 03:20:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138871745] [2024-10-14 03:20:12,264 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:20:12,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 03:20:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:20:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 03:20:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=684, Unknown=1, NotChecked=52, Total=812 [2024-10-14 03:20:12,265 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 21 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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) [2024-10-14 03:20:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:20:13,338 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2024-10-14 03:20:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 03:20:13,339 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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 56 [2024-10-14 03:20:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:20:13,340 INFO L225 Difference]: With dead ends: 72 [2024-10-14 03:20:13,340 INFO L226 Difference]: Without dead ends: 66 [2024-10-14 03:20:13,341 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=142, Invalid=1343, Unknown=1, NotChecked=74, Total=1560 [2024-10-14 03:20:13,341 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 03:20:13,341 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 99 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 03:20:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-14 03:20:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-10-14 03:20:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 10 states have call successors, (10), 7 states have call predecessors, (10), 13 states have return successors, (28), 15 states have call predecessors, (28), 9 states have call successors, (28) [2024-10-14 03:20:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2024-10-14 03:20:13,351 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 56 [2024-10-14 03:20:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:20:13,351 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2024-10-14 03:20:13,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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) [2024-10-14 03:20:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2024-10-14 03:20:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-14 03:20:13,352 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:20:13,352 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:20:13,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 03:20:13,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-14 03:20:13,553 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:20:13,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:20:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1723148096, now seen corresponding path program 5 times [2024-10-14 03:20:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:20:13,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937529427] [2024-10-14 03:20:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:20:13,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:20:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:20:13,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995676426] [2024-10-14 03:20:13,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 03:20:13,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:20:13,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:20:13,587 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:20:13,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 03:20:14,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-14 03:20:14,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:20:14,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 220 conjuncts are in the unsatisfiable core [2024-10-14 03:20:14,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:20:14,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:14,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:14,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:20:14,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:15,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:20:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 4 proven. 115 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-10-14 03:20:15,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:20:16,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:20:16,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937529427] [2024-10-14 03:20:16,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:20:16,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995676426] [2024-10-14 03:20:16,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995676426] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:20:16,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:20:16,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-10-14 03:20:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935594906] [2024-10-14 03:20:16,868 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:20:16,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-14 03:20:16,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:20:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-14 03:20:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2024-10-14 03:20:16,870 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 32 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 28 states have internal predecessors, (40), 10 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-14 03:20:20,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 03:20:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:20:22,129 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-10-14 03:20:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 03:20:22,130 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 28 states have internal predecessors, (40), 10 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 95 [2024-10-14 03:20:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:20:22,131 INFO L225 Difference]: With dead ends: 78 [2024-10-14 03:20:22,131 INFO L226 Difference]: Without dead ends: 72 [2024-10-14 03:20:22,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 13 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2024-10-14 03:20:22,132 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-10-14 03:20:22,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 194 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 866 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-10-14 03:20:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-14 03:20:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-10-14 03:20:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 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), 15 states have return successors, (30), 16 states have call predecessors, (30), 9 states have call successors, (30) [2024-10-14 03:20:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2024-10-14 03:20:22,143 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 95 [2024-10-14 03:20:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:20:22,144 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2024-10-14 03:20:22,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 28 states have internal predecessors, (40), 10 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-14 03:20:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2024-10-14 03:20:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-14 03:20:22,144 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:20:22,145 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] [2024-10-14 03:20:22,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 03:20:22,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-14 03:20:22,345 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:20:22,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:20:22,346 INFO L85 PathProgramCache]: Analyzing trace with hash 678304236, now seen corresponding path program 3 times [2024-10-14 03:20:22,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:20:22,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615740671] [2024-10-14 03:20:22,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:20:22,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:20:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:20:22,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996599760] [2024-10-14 03:20:22,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 03:20:22,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:20:22,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:20:22,369 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:20:22,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 03:20:22,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 03:20:22,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:20:22,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 189 conjuncts are in the unsatisfiable core [2024-10-14 03:20:22,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:20:22,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:20:22,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:22,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:20:22,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:22,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:22,890 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 [2024-10-14 03:20:23,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:23,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:20:23,450 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 7 treesize of output 3 [2024-10-14 03:20:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-14 03:20:23,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:20:25,444 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 [2024-10-14 03:20:25,461 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 [2024-10-14 03:20:25,478 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 [2024-10-14 03:20:25,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:20:25,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615740671] [2024-10-14 03:20:25,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:20:25,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996599760] [2024-10-14 03:20:25,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996599760] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:20:25,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:20:25,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-10-14 03:20:25,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840865963] [2024-10-14 03:20:25,660 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:20:25,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 03:20:25,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:20:25,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 03:20:25,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2024-10-14 03:20:25,661 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-10-14 03:20:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:20:26,403 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2024-10-14 03:20:26,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 03:20:26,404 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 69 [2024-10-14 03:20:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:20:26,404 INFO L225 Difference]: With dead ends: 78 [2024-10-14 03:20:26,404 INFO L226 Difference]: Without dead ends: 72 [2024-10-14 03:20:26,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2024-10-14 03:20:26,405 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 03:20:26,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 136 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 03:20:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-14 03:20:26,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-10-14 03:20:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 10 states have call successors, (10), 8 states have call predecessors, (10), 16 states have return successors, (32), 17 states have call predecessors, (32), 9 states have call successors, (32) [2024-10-14 03:20:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2024-10-14 03:20:26,416 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 69 [2024-10-14 03:20:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:20:26,417 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2024-10-14 03:20:26,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-10-14 03:20:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2024-10-14 03:20:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-14 03:20:26,417 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:20:26,418 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:20:26,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-14 03:20:26,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 03:20:26,618 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:20:26,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:20:26,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1688390358, now seen corresponding path program 3 times [2024-10-14 03:20:26,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:20:26,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458219512] [2024-10-14 03:20:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:20:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:20:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,090 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:20:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 03:20:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,100 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 03:20:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:20:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 03:20:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:20:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 03:20:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:20:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 03:20:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:20:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-14 03:20:27,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:20:27,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458219512] [2024-10-14 03:20:27,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458219512] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:20:27,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376864022] [2024-10-14 03:20:27,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 03:20:27,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:20:27,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:20:27,951 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:20:27,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 03:20:28,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 03:20:28,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:20:28,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-14 03:20:28,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:20:28,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:20:28,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:28,291 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 [2024-10-14 03:20:28,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:28,404 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 [2024-10-14 03:20:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-14 03:20:28,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:20:28,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376864022] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:20:28,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 03:20:28,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2024-10-14 03:20:28,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307454880] [2024-10-14 03:20:28,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 03:20:28,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-14 03:20:28,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:20:28,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-14 03:20:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 03:20:28,959 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 29 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 27 states have internal predecessors, (54), 16 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (18), 14 states have call predecessors, (18), 15 states have call successors, (18) [2024-10-14 03:20:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:20:30,383 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2024-10-14 03:20:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-14 03:20:30,383 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 27 states have internal predecessors, (54), 16 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (18), 14 states have call predecessors, (18), 15 states have call successors, (18) Word has length 69 [2024-10-14 03:20:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:20:30,384 INFO L225 Difference]: With dead ends: 150 [2024-10-14 03:20:30,384 INFO L226 Difference]: Without dead ends: 109 [2024-10-14 03:20:30,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=541, Invalid=3491, Unknown=0, NotChecked=0, Total=4032 [2024-10-14 03:20:30,386 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 03:20:30,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 220 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 03:20:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-14 03:20:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2024-10-14 03:20:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.105263157894737) internal successors, (63), 60 states have internal predecessors, (63), 14 states have call successors, (14), 10 states have call predecessors, (14), 18 states have return successors, (31), 19 states have call predecessors, (31), 13 states have call successors, (31) [2024-10-14 03:20:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2024-10-14 03:20:30,400 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 69 [2024-10-14 03:20:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:20:30,400 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2024-10-14 03:20:30,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 27 states have internal predecessors, (54), 16 states have call successors, (19), 4 states have call predecessors, (19), 7 states have return successors, (18), 14 states have call predecessors, (18), 15 states have call successors, (18) [2024-10-14 03:20:30,401 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2024-10-14 03:20:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-14 03:20:30,401 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:20:30,401 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:20:30,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 03:20:30,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:20:30,605 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:20:30,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:20:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash 47081006, now seen corresponding path program 4 times [2024-10-14 03:20:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:20:30,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925522851] [2024-10-14 03:20:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:20:30,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:20:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:31,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 03:20:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:31,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-14 03:20:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:31,101 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 03:20:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:31,463 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:20:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:31,467 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 03:20:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:31,826 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:20:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:31,831 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 03:20:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:32,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:20:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:32,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 03:20:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:32,637 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:20:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:32,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-14 03:20:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:32,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-14 03:20:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:20:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 54 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-10-14 03:20:32,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:20:32,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925522851] [2024-10-14 03:20:32,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925522851] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:20:32,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104939135] [2024-10-14 03:20:32,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 03:20:32,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:20:32,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:20:32,753 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:20:32,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 03:20:32,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 03:20:32,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:20:32,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-10-14 03:20:32,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:20:32,929 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 11 treesize of output 7 [2024-10-14 03:20:33,163 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 [2024-10-14 03:20:33,290 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 [2024-10-14 03:20:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-14 03:20:33,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:20:33,709 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 14 [2024-10-14 03:20:33,919 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 14 [2024-10-14 03:20:34,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-14 03:20:34,470 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 14 [2024-10-14 03:20:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 74 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-14 03:20:34,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104939135] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 03:20:34,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 03:20:34,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 20] total 50 [2024-10-14 03:20:34,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430145422] [2024-10-14 03:20:34,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 03:20:34,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-14 03:20:34,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:20:34,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-14 03:20:34,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2183, Unknown=0, NotChecked=0, Total=2450 [2024-10-14 03:20:34,632 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 50 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 44 states have internal predecessors, (80), 24 states have call successors, (28), 8 states have call predecessors, (28), 10 states have return successors, (27), 20 states have call predecessors, (27), 23 states have call successors, (27) [2024-10-14 03:20:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:20:37,092 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2024-10-14 03:20:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-14 03:20:37,093 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 44 states have internal predecessors, (80), 24 states have call successors, (28), 8 states have call predecessors, (28), 10 states have return successors, (27), 20 states have call predecessors, (27), 23 states have call successors, (27) Word has length 82 [2024-10-14 03:20:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:20:37,094 INFO L225 Difference]: With dead ends: 127 [2024-10-14 03:20:37,094 INFO L226 Difference]: Without dead ends: 115 [2024-10-14 03:20:37,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1116, Invalid=6540, Unknown=0, NotChecked=0, Total=7656 [2024-10-14 03:20:37,096 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 129 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-14 03:20:37,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 295 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-14 03:20:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-14 03:20:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2024-10-14 03:20:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.096774193548387) internal successors, (68), 65 states have internal predecessors, (68), 14 states have call successors, (14), 10 states have call predecessors, (14), 23 states have return successors, (39), 24 states have call predecessors, (39), 13 states have call successors, (39) [2024-10-14 03:20:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2024-10-14 03:20:37,117 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 82 [2024-10-14 03:20:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:20:37,117 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2024-10-14 03:20:37,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 44 states have internal predecessors, (80), 24 states have call successors, (28), 8 states have call predecessors, (28), 10 states have return successors, (27), 20 states have call predecessors, (27), 23 states have call successors, (27) [2024-10-14 03:20:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2024-10-14 03:20:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-14 03:20:37,118 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:20:37,118 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:20:37,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 03:20:37,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 03:20:37,319 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:20:37,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:20:37,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1762571436, now seen corresponding path program 5 times [2024-10-14 03:20:37,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:20:37,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997384290] [2024-10-14 03:20:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:20:37,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:20:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:20:37,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845972575] [2024-10-14 03:20:37,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 03:20:37,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:20:37,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:20:37,346 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:20:37,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 03:20:37,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-14 03:20:37,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:20:37,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 220 conjuncts are in the unsatisfiable core [2024-10-14 03:20:37,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:20:37,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:20:37,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:37,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:20:37,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:37,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:38,589 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 [2024-10-14 03:20:39,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:20:39,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:20:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-14 03:20:39,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:20:41,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:20:41,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997384290] [2024-10-14 03:20:41,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:20:41,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845972575] [2024-10-14 03:20:41,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845972575] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:20:41,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:20:41,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-10-14 03:20:41,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723437659] [2024-10-14 03:20:41,481 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:20:41,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-14 03:20:41,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:20:41,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-14 03:20:41,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 03:20:41,482 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 27 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-14 03:20:45,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 03:20:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:20:47,033 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2024-10-14 03:20:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-14 03:20:47,033 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2024-10-14 03:20:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:20:47,034 INFO L225 Difference]: With dead ends: 114 [2024-10-14 03:20:47,034 INFO L226 Difference]: Without dead ends: 108 [2024-10-14 03:20:47,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=186, Invalid=1884, Unknown=0, NotChecked=0, Total=2070 [2024-10-14 03:20:47,035 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-10-14 03:20:47,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 153 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 843 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2024-10-14 03:20:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-14 03:20:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2024-10-14 03:20:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.096774193548387) internal successors, (68), 65 states have internal predecessors, (68), 14 states have call successors, (14), 10 states have call predecessors, (14), 23 states have return successors, (39), 24 states have call predecessors, (39), 13 states have call successors, (39) [2024-10-14 03:20:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2024-10-14 03:20:47,060 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 69 [2024-10-14 03:20:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:20:47,060 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2024-10-14 03:20:47,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-10-14 03:20:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2024-10-14 03:20:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-14 03:20:47,061 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:20:47,061 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:20:47,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 03:20:47,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 03:20:47,262 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:20:47,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:20:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1822403864, now seen corresponding path program 6 times [2024-10-14 03:20:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:20:47,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138745118] [2024-10-14 03:20:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:20:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:20:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:20:47,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666890570] [2024-10-14 03:20:47,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 03:20:47,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:20:47,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:20:47,291 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:20:47,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 03:20:47,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-14 03:20:47,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 03:20:47,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-10-14 03:20:47,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:20:47,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:20:47,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:47,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:47,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:20:47,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:20:47,976 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 [2024-10-14 03:20:48,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:20:48,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:20:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-14 03:20:48,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:20:58,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 03:20:58,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138745118] [2024-10-14 03:20:58,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 03:20:58,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666890570] [2024-10-14 03:20:58,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666890570] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 03:20:58,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-14 03:20:58,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-10-14 03:20:58,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224138997] [2024-10-14 03:20:58,657 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-14 03:20:58,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 03:20:58,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 03:20:58,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 03:20:58,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=735, Unknown=1, NotChecked=0, Total=812 [2024-10-14 03:20:58,658 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 23 states, 18 states have (on average 2.0) internal successors, (36), 20 states have internal predecessors, (36), 9 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-14 03:20:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 03:20:59,517 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2024-10-14 03:20:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-14 03:20:59,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 20 states have internal predecessors, (36), 9 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2024-10-14 03:20:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 03:20:59,518 INFO L225 Difference]: With dead ends: 114 [2024-10-14 03:20:59,518 INFO L226 Difference]: Without dead ends: 108 [2024-10-14 03:20:59,519 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=135, Invalid=1270, Unknown=1, NotChecked=0, Total=1406 [2024-10-14 03:20:59,519 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 03:20:59,519 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 03:20:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-14 03:20:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2024-10-14 03:20:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 64 states have (on average 1.09375) internal successors, (70), 67 states have internal predecessors, (70), 14 states have call successors, (14), 10 states have call predecessors, (14), 25 states have return successors, (42), 26 states have call predecessors, (42), 13 states have call successors, (42) [2024-10-14 03:20:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2024-10-14 03:20:59,542 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 69 [2024-10-14 03:20:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 03:20:59,542 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2024-10-14 03:20:59,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 20 states have internal predecessors, (36), 9 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-14 03:20:59,542 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2024-10-14 03:20:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-14 03:20:59,544 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 03:20:59,544 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 03:20:59,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-14 03:20:59,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 03:20:59,745 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 03:20:59,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 03:20:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2090738942, now seen corresponding path program 7 times [2024-10-14 03:20:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 03:20:59,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675628548] [2024-10-14 03:20:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 03:20:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 03:20:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 03:20:59,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072311039] [2024-10-14 03:20:59,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 03:20:59,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 03:20:59,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 03:20:59,777 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 03:20:59,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 03:21:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 03:21:00,014 WARN L253 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 326 conjuncts are in the unsatisfiable core [2024-10-14 03:21:00,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 03:21:00,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:21:00,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 03:21:00,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:21:00,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 03:21:00,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:21:00,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 03:21:00,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 03:21:01,149 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 24 [2024-10-14 03:21:01,152 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 20 [2024-10-14 03:21:01,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:21:01,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:21:01,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-14 03:21:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-10-14 03:21:02,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 03:21:07,569 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 70 treesize of output 62 [2024-10-14 03:21:07,578 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 62 treesize of output 58 [2024-10-14 03:21:07,602 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 58 treesize of output 54