./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_fermat1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 03:08:36,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 03:08:36,232 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 03:08:36,237 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 03:08:36,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 03:08:36,265 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 03:08:36,265 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 03:08:36,266 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 03:08:36,268 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 03:08:36,270 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 03:08:36,270 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 03:08:36,271 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 03:08:36,271 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 03:08:36,272 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 03:08:36,272 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 03:08:36,272 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 03:08:36,272 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 03:08:36,273 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 03:08:36,273 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 03:08:36,277 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 03:08:36,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 03:08:36,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 03:08:36,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 03:08:36,279 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 03:08:36,279 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 03:08:36,279 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 03:08:36,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 03:08:36,279 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 03:08:36,280 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 03:08:36,280 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 03:08:36,280 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 03:08:36,280 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 03:08:36,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 03:08:36,281 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 03:08:36,281 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 03:08:36,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 03:08:36,284 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 03:08:36,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 03:08:36,284 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 03:08:36,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 03:08:36,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 03:08:36,285 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 03:08:36,285 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 [2024-10-11 03:08:36,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 03:08:36,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 03:08:36,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 03:08:36,597 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 03:08:36,597 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 03:08:36,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2024-10-11 03:08:38,019 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 03:08:38,219 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 03:08:38,220 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2024-10-11 03:08:38,229 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/042af79de/78b0e174cc5541018b6a6b7153b7f411/FLAG0228561b3 [2024-10-11 03:08:38,244 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/042af79de/78b0e174cc5541018b6a6b7153b7f411 [2024-10-11 03:08:38,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 03:08:38,249 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 03:08:38,250 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 03:08:38,250 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 03:08:38,255 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 03:08:38,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,256 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d775be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38, skipping insertion in model container [2024-10-11 03:08:38,256 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,277 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 03:08:38,455 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_fermat1-ll.c[1101,1114] [2024-10-11 03:08:38,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 03:08:38,489 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 03:08:38,501 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_fermat1-ll.c[1101,1114] [2024-10-11 03:08:38,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 03:08:38,532 INFO L204 MainTranslator]: Completed translation [2024-10-11 03:08:38,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38 WrapperNode [2024-10-11 03:08:38,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 03:08:38,534 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 03:08:38,535 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 03:08:38,535 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 03:08:38,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,549 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,570 INFO L138 Inliner]: procedures = 18, calls = 82, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-10-11 03:08:38,571 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 03:08:38,572 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 03:08:38,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 03:08:38,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 03:08:38,581 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,587 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,611 INFO L175 MemorySlicer]: Split 53 memory accesses to 5 slices as follows [2, 8, 11, 16, 16]. 30 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 1, 3, 2, 2]. [2024-10-11 03:08:38,611 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,612 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,619 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,621 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,623 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,624 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,631 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 03:08:38,632 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 03:08:38,632 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 03:08:38,632 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 03:08:38,633 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (1/1) ... [2024-10-11 03:08:38,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 03:08:38,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:38,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 03:08:38,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 03:08:38,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 03:08:38,727 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_36_0 [2024-10-11 03:08:38,728 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_36_0 [2024-10-11 03:08:38,728 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 03:08:38,728 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 03:08:38,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 03:08:38,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 03:08:38,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 03:08:38,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 03:08:38,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-11 03:08:38,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 03:08:38,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 03:08:38,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 03:08:38,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 03:08:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 03:08:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-11 03:08:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_43_0 [2024-10-11 03:08:38,732 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_43_0 [2024-10-11 03:08:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_46_to_51_0 [2024-10-11 03:08:38,732 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_46_to_51_0 [2024-10-11 03:08:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 03:08:38,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 03:08:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 03:08:38,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 03:08:38,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 03:08:38,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 03:08:38,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-11 03:08:38,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 03:08:38,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 03:08:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 03:08:38,850 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 03:08:38,852 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 03:08:39,155 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-10-11 03:08:39,156 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 03:08:39,194 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 03:08:39,195 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 03:08:39,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:08:39 BoogieIcfgContainer [2024-10-11 03:08:39,196 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 03:08:39,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 03:08:39,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 03:08:39,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 03:08:39,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 03:08:38" (1/3) ... [2024-10-11 03:08:39,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c63265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:08:39, skipping insertion in model container [2024-10-11 03:08:39,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:38" (2/3) ... [2024-10-11 03:08:39,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c63265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:08:39, skipping insertion in model container [2024-10-11 03:08:39,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:08:39" (3/3) ... [2024-10-11 03:08:39,206 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat1-ll.c [2024-10-11 03:08:39,224 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 03:08:39,224 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 03:08:39,281 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 03:08:39,289 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;@4ec129e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 03:08:39,289 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 03:08:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 states have internal predecessors, (36), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-11 03:08:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-11 03:08:39,300 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:39,300 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:39,301 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:39,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:39,307 INFO L85 PathProgramCache]: Analyzing trace with hash -63826277, now seen corresponding path program 1 times [2024-10-11 03:08:39,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:39,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466417677] [2024-10-11 03:08:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:39,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:08:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:39,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 03:08:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:08:39,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:39,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466417677] [2024-10-11 03:08:39,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466417677] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:08:39,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:08:39,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 03:08:39,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874977628] [2024-10-11 03:08:39,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:08:39,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 03:08:39,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 03:08:39,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 03:08:39,658 INFO L87 Difference]: Start difference. First operand has 46 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 states have internal predecessors, (36), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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) [2024-10-11 03:08:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:39,687 INFO L93 Difference]: Finished difference Result 90 states and 129 transitions. [2024-10-11 03:08:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 03:08:39,691 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 [2024-10-11 03:08:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:39,697 INFO L225 Difference]: With dead ends: 90 [2024-10-11 03:08:39,697 INFO L226 Difference]: Without dead ends: 44 [2024-10-11 03:08:39,700 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 [2024-10-11 03:08:39,703 INFO L432 NwaCegarLoop]: 53 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, 53 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 [2024-10-11 03:08:39,704 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 03:08:39,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-11 03:08:39,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-11 03:08:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 30 states have internal predecessors, (30), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-11 03:08:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-10-11 03:08:39,735 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 20 [2024-10-11 03:08:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:39,735 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-10-11 03:08:39,735 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) [2024-10-11 03:08:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-10-11 03:08:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-11 03:08:39,737 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:39,737 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:39,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 03:08:39,737 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:39,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:39,738 INFO L85 PathProgramCache]: Analyzing trace with hash -951109601, now seen corresponding path program 1 times [2024-10-11 03:08:39,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:39,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263439642] [2024-10-11 03:08:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:39,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:39,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056194488] [2024-10-11 03:08:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:39,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:39,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:39,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:08:39,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 03:08:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:40,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-11 03:08:40,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:40,056 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 [2024-10-11 03:08:40,084 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 21 treesize of output 15 [2024-10-11 03:08:40,093 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 [2024-10-11 03:08:40,119 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 [2024-10-11 03:08:40,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2024-10-11 03:08:40,400 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 39 treesize of output 31 [2024-10-11 03:08:40,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 36 [2024-10-11 03:08:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:08:40,621 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 03:08:40,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:40,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263439642] [2024-10-11 03:08:40,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:40,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056194488] [2024-10-11 03:08:40,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056194488] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:08:40,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:08:40,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 03:08:40,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935007929] [2024-10-11 03:08:40,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:08:40,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 03:08:40,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 03:08:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 03:08:40,627 INFO L87 Difference]: Start difference. First operand 44 states and 53 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) [2024-10-11 03:08:41,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:41,358 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2024-10-11 03:08:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 03:08:41,359 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 [2024-10-11 03:08:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:41,361 INFO L225 Difference]: With dead ends: 59 [2024-10-11 03:08:41,361 INFO L226 Difference]: Without dead ends: 57 [2024-10-11 03:08:41,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-11 03:08:41,364 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:41,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 270 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 03:08:41,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-11 03:08:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-10-11 03:08:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 38 states have internal predecessors, (39), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-10-11 03:08:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-10-11 03:08:41,384 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 20 [2024-10-11 03:08:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:41,384 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-10-11 03:08:41,384 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) [2024-10-11 03:08:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-10-11 03:08:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-11 03:08:41,385 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:41,386 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] [2024-10-11 03:08:41,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 03:08:41,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:41,590 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:41,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:41,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1139007694, now seen corresponding path program 1 times [2024-10-11 03:08:41,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:41,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375097962] [2024-10-11 03:08:41,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:41,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:41,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378512318] [2024-10-11 03:08:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:41,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:41,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:41,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:08:41,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 03:08:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:41,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-10-11 03:08:41,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:41,831 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 [2024-10-11 03:08:41,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-10-11 03:08:41,846 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 [2024-10-11 03:08:41,860 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 [2024-10-11 03:08:42,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2024-10-11 03:08:42,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-10-11 03:08:42,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 36 [2024-10-11 03:08:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:08:42,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:08:44,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375097962] [2024-10-11 03:08:44,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:44,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378512318] [2024-10-11 03:08:44,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378512318] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 03:08:44,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:08:44,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2024-10-11 03:08:44,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810320556] [2024-10-11 03:08:44,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:08:44,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 03:08:44,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:44,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 03:08:44,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-10-11 03:08:44,665 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 03:08:45,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:45,422 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2024-10-11 03:08:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 03:08:45,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-10-11 03:08:45,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:45,425 INFO L225 Difference]: With dead ends: 74 [2024-10-11 03:08:45,425 INFO L226 Difference]: Without dead ends: 72 [2024-10-11 03:08:45,425 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-10-11 03:08:45,426 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:45,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 299 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 03:08:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-11 03:08:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-10-11 03:08:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 49 states have internal predecessors, (49), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (20), 14 states have call predecessors, (20), 15 states have call successors, (20) [2024-10-11 03:08:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-10-11 03:08:45,451 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 30 [2024-10-11 03:08:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:45,451 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-10-11 03:08:45,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 03:08:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-10-11 03:08:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-11 03:08:45,452 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:45,452 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] [2024-10-11 03:08:45,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 03:08:45,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:45,654 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:45,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1135914954, now seen corresponding path program 1 times [2024-10-11 03:08:45,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:45,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547881589] [2024-10-11 03:08:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:45,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:45,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123141624] [2024-10-11 03:08:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:45,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:45,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:08:45,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 03:08:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:45,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-11 03:08:45,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:45,848 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 [2024-10-11 03:08:46,058 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 [2024-10-11 03:08:46,072 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 21 treesize of output 15 [2024-10-11 03:08:46,079 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 [2024-10-11 03:08:46,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-11 03:08:46,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 40 [2024-10-11 03:08:47,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:08:47,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 137 [2024-10-11 03:08:47,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 62 [2024-10-11 03:08:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 03:08:47,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:52,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:52,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547881589] [2024-10-11 03:08:52,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:52,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123141624] [2024-10-11 03:08:52,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123141624] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:08:52,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:08:52,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-11 03:08:52,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852592536] [2024-10-11 03:08:52,585 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:08:52,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 03:08:52,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:52,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 03:08:52,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-10-11 03:08:52,586 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-11 03:08:56,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-11 03:09:00,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-11 03:09:05,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-11 03:09:08,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-11 03:09:12,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-11 03:09:12,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:12,986 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2024-10-11 03:09:12,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 03:09:12,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2024-10-11 03:09:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:12,988 INFO L225 Difference]: With dead ends: 90 [2024-10-11 03:09:12,988 INFO L226 Difference]: Without dead ends: 80 [2024-10-11 03:09:12,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2024-10-11 03:09:12,990 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 29 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:12,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 112 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 656 Invalid, 4 Unknown, 0 Unchecked, 19.7s Time] [2024-10-11 03:09:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-10-11 03:09:13,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-10-11 03:09:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 53 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 13 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) [2024-10-11 03:09:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2024-10-11 03:09:13,042 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 30 [2024-10-11 03:09:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:13,043 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2024-10-11 03:09:13,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-11 03:09:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2024-10-11 03:09:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-11 03:09:13,044 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:13,044 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:13,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 03:09:13,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:13,245 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:13,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:13,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1338850680, now seen corresponding path program 1 times [2024-10-11 03:09:13,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:13,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613780252] [2024-10-11 03:09:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:13,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:13,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842123290] [2024-10-11 03:09:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:13,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:13,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:09:13,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 03:09:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:13,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-10-11 03:09:13,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:13,468 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 [2024-10-11 03:09:13,476 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 [2024-10-11 03:09:13,484 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 21 treesize of output 15 [2024-10-11 03:09:13,489 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 [2024-10-11 03:09:13,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-11 03:09:13,976 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 43 treesize of output 35 [2024-10-11 03:09:13,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-10-11 03:09:13,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 36 [2024-10-11 03:09:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:09:14,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:17,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:17,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613780252] [2024-10-11 03:09:17,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:17,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842123290] [2024-10-11 03:09:17,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842123290] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:17,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:17,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-10-11 03:09:17,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598654440] [2024-10-11 03:09:17,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:17,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 03:09:17,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 03:09:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-10-11 03:09:17,762 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-11 03:09:21,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 03:09:25,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-11 03:09:28,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-11 03:09:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:29,536 INFO L93 Difference]: Finished difference Result 156 states and 196 transitions. [2024-10-11 03:09:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 03:09:29,537 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2024-10-11 03:09:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:29,540 INFO L225 Difference]: With dead ends: 156 [2024-10-11 03:09:29,540 INFO L226 Difference]: Without dead ends: 150 [2024-10-11 03:09:29,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2024-10-11 03:09:29,542 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 61 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:29,542 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 200 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 493 Invalid, 5 Unknown, 0 Unchecked, 11.2s Time] [2024-10-11 03:09:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-11 03:09:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2024-10-11 03:09:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 96 states have internal predecessors, (100), 33 states have call successors, (33), 19 states have call predecessors, (33), 23 states have return successors, (51), 32 states have call predecessors, (51), 31 states have call successors, (51) [2024-10-11 03:09:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2024-10-11 03:09:29,586 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 42 [2024-10-11 03:09:29,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:29,586 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2024-10-11 03:09:29,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-11 03:09:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2024-10-11 03:09:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-11 03:09:29,588 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:29,588 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:29,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 03:09:29,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:29,789 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:29,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:29,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1459348665, now seen corresponding path program 1 times [2024-10-11 03:09:29,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:29,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438744214] [2024-10-11 03:09:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:29,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:30,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:09:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:30,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 03:09:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:30,378 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-11 03:09:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:30,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-11 03:09:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:30,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:09:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:30,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-11 03:09:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:30,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:09:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 03:09:30,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:30,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438744214] [2024-10-11 03:09:30,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438744214] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:09:30,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:09:30,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-10-11 03:09:30,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015621118] [2024-10-11 03:09:30,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:09:30,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 03:09:30,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 03:09:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2024-10-11 03:09:30,725 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 16 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-11 03:09:31,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:31,220 INFO L93 Difference]: Finished difference Result 234 states and 300 transitions. [2024-10-11 03:09:31,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 03:09:31,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 54 [2024-10-11 03:09:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:31,223 INFO L225 Difference]: With dead ends: 234 [2024-10-11 03:09:31,223 INFO L226 Difference]: Without dead ends: 135 [2024-10-11 03:09:31,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2024-10-11 03:09:31,225 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:31,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 99 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:09:31,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-11 03:09:31,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-10-11 03:09:31,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 84 states have (on average 1.119047619047619) internal successors, (94), 90 states have internal predecessors, (94), 28 states have call successors, (28), 18 states have call predecessors, (28), 22 states have return successors, (39), 26 states have call predecessors, (39), 26 states have call successors, (39) [2024-10-11 03:09:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 161 transitions. [2024-10-11 03:09:31,273 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 161 transitions. Word has length 54 [2024-10-11 03:09:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:31,274 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 161 transitions. [2024-10-11 03:09:31,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-11 03:09:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 161 transitions. [2024-10-11 03:09:31,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-11 03:09:31,275 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:31,276 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:31,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 03:09:31,276 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:31,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1228773123, now seen corresponding path program 1 times [2024-10-11 03:09:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:31,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993302046] [2024-10-11 03:09:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:31,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:31,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944462757] [2024-10-11 03:09:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:31,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:31,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:09:31,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 03:09:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:31,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-10-11 03:09:31,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:31,487 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 [2024-10-11 03:09:31,543 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 [2024-10-11 03:09:31,551 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 21 treesize of output 15 [2024-10-11 03:09:31,556 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 15 treesize of output 11 [2024-10-11 03:09:38,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-11 03:09:47,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2024-10-11 03:09:47,758 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 [2024-10-11 03:09:58,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2024-10-11 03:09:58,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:09:58,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 159 treesize of output 151