./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9e86f2555d2c0682f4edf4cb7d0ea92e4bc79b6db041eb754ceacfe5541e219 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 21:56:25,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 21:56:25,587 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 21:56:25,591 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 21:56:25,593 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 21:56:25,608 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 21:56:25,608 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 21:56:25,608 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 21:56:25,609 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 21:56:25,609 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 21:56:25,609 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 21:56:25,610 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 21:56:25,610 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 21:56:25,610 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 21:56:25,611 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 21:56:25,611 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 21:56:25,611 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 21:56:25,612 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 21:56:25,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 21:56:25,612 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 21:56:25,612 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 21:56:25,613 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 21:56:25,613 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 21:56:25,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 21:56:25,614 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 21:56:25,614 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 21:56:25,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 21:56:25,614 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 21:56:25,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 21:56:25,615 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 21:56:25,615 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 21:56:25,615 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 21:56:25,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 21:56:25,616 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 21:56:25,616 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 21:56:25,616 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 21:56:25,617 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 21:56:25,617 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 21:56:25,617 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 21:56:25,617 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 21:56:25,617 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 21:56:25,618 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 21:56:25,618 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9e86f2555d2c0682f4edf4cb7d0ea92e4bc79b6db041eb754ceacfe5541e219 [2024-10-13 21:56:25,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 21:56:25,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 21:56:25,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 21:56:25,828 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 21:56:25,828 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 21:56:25,829 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2024-10-13 21:56:27,066 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 21:56:27,263 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 21:56:27,263 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2024-10-13 21:56:27,269 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27382af2/d4fc14f86b34441994db872c6e179c06/FLAGe80f7c771 [2024-10-13 21:56:27,281 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b27382af2/d4fc14f86b34441994db872c6e179c06 [2024-10-13 21:56:27,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 21:56:27,284 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 21:56:27,285 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 21:56:27,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 21:56:27,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 21:56:27,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f724d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27, skipping insertion in model container [2024-10-13 21:56:27,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,306 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 21:56:27,411 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/array-examples/standard_copy6_ground-2.i[816,829] [2024-10-13 21:56:27,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 21:56:27,432 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 21:56:27,441 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/array-examples/standard_copy6_ground-2.i[816,829] [2024-10-13 21:56:27,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 21:56:27,461 INFO L204 MainTranslator]: Completed translation [2024-10-13 21:56:27,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27 WrapperNode [2024-10-13 21:56:27,462 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 21:56:27,463 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 21:56:27,463 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 21:56:27,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 21:56:27,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,475 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,495 INFO L138 Inliner]: procedures = 16, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 144 [2024-10-13 21:56:27,498 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 21:56:27,498 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 21:56:27,499 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 21:56:27,499 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 21:56:27,507 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,514 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,526 INFO L175 MemorySlicer]: Split 17 memory accesses to 8 slices as follows [2, 3, 2, 2, 2, 2, 2, 2]. 18 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 1, 1, 1, 1, 1, 1]. [2024-10-13 21:56:27,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,527 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,531 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,534 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,535 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 21:56:27,539 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 21:56:27,539 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 21:56:27,539 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 21:56:27,540 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (1/1) ... [2024-10-13 21:56:27,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 21:56:27,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:27,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 21:56:27,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 21:56:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 21:56:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 21:56:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 21:56:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 21:56:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 21:56:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-13 21:56:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-13 21:56:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-13 21:56:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-13 21:56:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 21:56:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 21:56:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 21:56:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 21:56:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 21:56:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-13 21:56:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-13 21:56:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-13 21:56:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-13 21:56:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 21:56:27,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 21:56:27,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 21:56:27,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 21:56:27,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 21:56:27,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 21:56:27,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-13 21:56:27,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-13 21:56:27,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-13 21:56:27,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-13 21:56:27,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 21:56:27,687 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 21:56:27,688 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 21:56:27,859 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-10-13 21:56:27,860 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 21:56:27,911 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 21:56:27,911 INFO L314 CfgBuilder]: Removed 8 assume(true) statements. [2024-10-13 21:56:27,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:56:27 BoogieIcfgContainer [2024-10-13 21:56:27,912 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 21:56:27,913 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 21:56:27,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 21:56:27,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 21:56:27,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:56:27" (1/3) ... [2024-10-13 21:56:27,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9e8d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:56:27, skipping insertion in model container [2024-10-13 21:56:27,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:56:27" (2/3) ... [2024-10-13 21:56:27,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9e8d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:56:27, skipping insertion in model container [2024-10-13 21:56:27,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:56:27" (3/3) ... [2024-10-13 21:56:27,919 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2024-10-13 21:56:27,933 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 21:56:27,933 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 21:56:27,981 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 21:56:27,986 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;@3cabdf26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 21:56:27,987 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 21:56:27,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 21:56:27,999 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:28,000 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:28,000 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:28,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:28,009 INFO L85 PathProgramCache]: Analyzing trace with hash -864895236, now seen corresponding path program 1 times [2024-10-13 21:56:28,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:28,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053123104] [2024-10-13 21:56:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:28,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 21:56:28,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:28,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053123104] [2024-10-13 21:56:28,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053123104] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 21:56:28,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 21:56:28,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 21:56:28,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907961826] [2024-10-13 21:56:28,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 21:56:28,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 21:56:28,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 21:56:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 21:56:28,326 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:28,377 INFO L93 Difference]: Finished difference Result 43 states and 75 transitions. [2024-10-13 21:56:28,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 21:56:28,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 21:56:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:28,385 INFO L225 Difference]: With dead ends: 43 [2024-10-13 21:56:28,386 INFO L226 Difference]: Without dead ends: 21 [2024-10-13 21:56:28,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 21:56:28,392 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:28,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:56:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-13 21:56:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-13 21:56:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2024-10-13 21:56:28,420 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 18 [2024-10-13 21:56:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:28,420 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2024-10-13 21:56:28,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2024-10-13 21:56:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 21:56:28,422 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:28,422 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:28,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 21:56:28,423 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:28,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash -501501452, now seen corresponding path program 1 times [2024-10-13 21:56:28,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:28,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051336288] [2024-10-13 21:56:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 21:56:28,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:28,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051336288] [2024-10-13 21:56:28,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051336288] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:28,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135767038] [2024-10-13 21:56:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:28,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:28,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:28,526 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:28,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 21:56:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:28,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 21:56:28,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:56:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 21:56:28,641 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 21:56:28,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135767038] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 21:56:28,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 21:56:28,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-10-13 21:56:28,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457182239] [2024-10-13 21:56:28,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 21:56:28,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 21:56:28,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 21:56:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 21:56:28,644 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:28,683 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2024-10-13 21:56:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 21:56:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-13 21:56:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:28,684 INFO L225 Difference]: With dead ends: 43 [2024-10-13 21:56:28,684 INFO L226 Difference]: Without dead ends: 27 [2024-10-13 21:56:28,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 21:56:28,685 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:28,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:56:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-13 21:56:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-13 21:56:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-10-13 21:56:28,689 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 19 [2024-10-13 21:56:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:28,690 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-10-13 21:56:28,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-10-13 21:56:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 21:56:28,691 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:28,691 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-13 21:56:28,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 21:56:28,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:28,895 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:28,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash 168132707, now seen corresponding path program 1 times [2024-10-13 21:56:28,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:28,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141993101] [2024-10-13 21:56:28,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 21:56:28,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:28,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141993101] [2024-10-13 21:56:28,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141993101] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:28,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713806282] [2024-10-13 21:56:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:28,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:28,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:28,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:28,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 21:56:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:29,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 21:56:29,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:56:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 21:56:29,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:56:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 21:56:29,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713806282] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:56:29,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:56:29,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 21:56:29,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533502410] [2024-10-13 21:56:29,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:56:29,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 21:56:29,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:29,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 21:56:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 21:56:29,097 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:29,131 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2024-10-13 21:56:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 21:56:29,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-13 21:56:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:29,132 INFO L225 Difference]: With dead ends: 54 [2024-10-13 21:56:29,133 INFO L226 Difference]: Without dead ends: 30 [2024-10-13 21:56:29,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 21:56:29,135 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:29,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:56:29,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-13 21:56:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-13 21:56:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-10-13 21:56:29,141 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 25 [2024-10-13 21:56:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:29,141 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-10-13 21:56:29,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-10-13 21:56:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-13 21:56:29,144 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:29,144 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:29,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 21:56:29,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-13 21:56:29,345 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:29,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash 577523935, now seen corresponding path program 2 times [2024-10-13 21:56:29,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:29,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481141231] [2024-10-13 21:56:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:29,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 21:56:29,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:29,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481141231] [2024-10-13 21:56:29,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481141231] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:29,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239342855] [2024-10-13 21:56:29,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 21:56:29,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:29,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:29,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:29,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 21:56:29,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 21:56:29,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:56:29,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 21:56:29,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:56:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 21:56:29,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:56:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 21:56:29,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239342855] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:56:29,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:56:29,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-13 21:56:29,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805459548] [2024-10-13 21:56:29,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:56:29,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 21:56:29,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 21:56:29,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 21:56:29,652 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:29,737 INFO L93 Difference]: Finished difference Result 69 states and 99 transitions. [2024-10-13 21:56:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 21:56:29,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-10-13 21:56:29,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:29,739 INFO L225 Difference]: With dead ends: 69 [2024-10-13 21:56:29,739 INFO L226 Difference]: Without dead ends: 48 [2024-10-13 21:56:29,739 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 21:56:29,740 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:29,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 21:56:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-13 21:56:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-10-13 21:56:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-10-13 21:56:29,745 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 28 [2024-10-13 21:56:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:29,745 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-10-13 21:56:29,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-10-13 21:56:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-13 21:56:29,746 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:29,746 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:29,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 21:56:29,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:29,951 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:29,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:29,952 INFO L85 PathProgramCache]: Analyzing trace with hash 750832816, now seen corresponding path program 3 times [2024-10-13 21:56:29,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:29,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562614642] [2024-10-13 21:56:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:29,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-13 21:56:30,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:30,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562614642] [2024-10-13 21:56:30,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562614642] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:30,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922412425] [2024-10-13 21:56:30,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 21:56:30,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:30,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:30,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:30,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 21:56:30,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 21:56:30,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:56:30,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 21:56:30,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:56:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-13 21:56:30,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:56:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-13 21:56:30,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922412425] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:56:30,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:56:30,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-10-13 21:56:30,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544340800] [2024-10-13 21:56:30,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:56:30,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 21:56:30,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:30,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 21:56:30,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2024-10-13 21:56:30,388 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:30,648 INFO L93 Difference]: Finished difference Result 127 states and 177 transitions. [2024-10-13 21:56:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 21:56:30,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-13 21:56:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:30,650 INFO L225 Difference]: With dead ends: 127 [2024-10-13 21:56:30,651 INFO L226 Difference]: Without dead ends: 85 [2024-10-13 21:56:30,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2024-10-13 21:56:30,653 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:30,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 21:56:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-13 21:56:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-10-13 21:56:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2024-10-13 21:56:30,664 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 46 [2024-10-13 21:56:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:30,664 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2024-10-13 21:56:30,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2024-10-13 21:56:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-13 21:56:30,666 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:30,666 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:30,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 21:56:30,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:30,867 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:30,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash 553269268, now seen corresponding path program 4 times [2024-10-13 21:56:30,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:30,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123179384] [2024-10-13 21:56:30,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:30,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-10-13 21:56:31,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:31,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123179384] [2024-10-13 21:56:31,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123179384] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:31,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392866826] [2024-10-13 21:56:31,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 21:56:31,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:31,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:31,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 21:56:31,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 21:56:31,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 21:56:31,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 21:56:31,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 21:56:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-10-13 21:56:31,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 21:56:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-10-13 21:56:31,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392866826] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 21:56:31,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 21:56:31,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-10-13 21:56:31,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968778281] [2024-10-13 21:56:31,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 21:56:31,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 21:56:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 21:56:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 21:56:31,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-10-13 21:56:31,359 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 21:56:31,392 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2024-10-13 21:56:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 21:56:31,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2024-10-13 21:56:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 21:56:31,393 INFO L225 Difference]: With dead ends: 170 [2024-10-13 21:56:31,393 INFO L226 Difference]: Without dead ends: 92 [2024-10-13 21:56:31,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-10-13 21:56:31,394 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 21:56:31,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 21:56:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-13 21:56:31,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-10-13 21:56:31,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 91 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:31,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2024-10-13 21:56:31,401 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 83 [2024-10-13 21:56:31,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 21:56:31,401 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2024-10-13 21:56:31,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 21:56:31,402 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2024-10-13 21:56:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-10-13 21:56:31,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 21:56:31,402 INFO L215 NwaCegarLoop]: trace histogram [12, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 21:56:31,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 21:56:31,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:31,607 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 21:56:31,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 21:56:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2111469200, now seen corresponding path program 5 times [2024-10-13 21:56:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 21:56:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586373678] [2024-10-13 21:56:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 21:56:31,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 21:56:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 21:56:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-10-13 21:56:32,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 21:56:32,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586373678] [2024-10-13 21:56:32,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586373678] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 21:56:32,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778766888] [2024-10-13 21:56:32,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 21:56:32,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 21:56:32,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 21:56:32,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 21:56:32,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process