./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 08:05:37,192 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 08:05:37,257 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 08:05:37,265 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 08:05:37,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 08:05:37,296 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 08:05:37,299 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 08:05:37,299 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 08:05:37,300 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 08:05:37,301 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 08:05:37,302 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 08:05:37,302 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 08:05:37,303 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 08:05:37,305 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 08:05:37,306 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 08:05:37,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 08:05:37,307 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 08:05:37,307 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 08:05:37,307 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 08:05:37,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 08:05:37,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 08:05:37,312 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 08:05:37,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 08:05:37,313 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 08:05:37,313 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 08:05:37,313 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 08:05:37,314 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 08:05:37,314 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 08:05:37,314 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 08:05:37,314 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 08:05:37,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 08:05:37,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 08:05:37,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:05:37,315 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 08:05:37,316 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 08:05:37,316 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 08:05:37,319 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 08:05:37,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 08:05:37,319 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 08:05:37,319 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 08:05:37,319 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 08:05:37,320 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 08:05:37,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af [2024-11-16 08:05:37,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 08:05:37,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 08:05:37,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 08:05:37,609 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 08:05:37,609 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 08:05:37,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-11-16 08:05:39,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 08:05:39,296 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 08:05:39,296 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2024-11-16 08:05:39,303 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3b6d85b6/b7adac4e9d854bcb9de9b0c54ca01ee3/FLAG5179af92e [2024-11-16 08:05:39,316 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3b6d85b6/b7adac4e9d854bcb9de9b0c54ca01ee3 [2024-11-16 08:05:39,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 08:05:39,319 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 08:05:39,321 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 08:05:39,322 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 08:05:39,327 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 08:05:39,328 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,329 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d1b2c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39, skipping insertion in model container [2024-11-16 08:05:39,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,349 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 08:05:39,510 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2024-11-16 08:05:39,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:05:39,534 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 08:05:39,562 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2024-11-16 08:05:39,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 08:05:39,591 INFO L204 MainTranslator]: Completed translation [2024-11-16 08:05:39,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39 WrapperNode [2024-11-16 08:05:39,601 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 08:05:39,603 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 08:05:39,603 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 08:05:39,603 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 08:05:39,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,622 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,641 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2024-11-16 08:05:39,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 08:05:39,643 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 08:05:39,643 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 08:05:39,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 08:05:39,653 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,660 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,678 INFO L175 MemorySlicer]: Split 33 memory accesses to 5 slices as follows [2, 8, 12, 9, 2]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 2, 2, 1]. [2024-11-16 08:05:39,678 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,678 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,684 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,684 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,686 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,687 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,689 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 08:05:39,691 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 08:05:39,691 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 08:05:39,691 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 08:05:39,692 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (1/1) ... [2024-11-16 08:05:39,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 08:05:39,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:05:39,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 08:05:39,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 08:05:39,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 08:05:39,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 08:05:39,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 08:05:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 08:05:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 08:05:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-16 08:05:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 08:05:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 08:05:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 08:05:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 08:05:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 08:05:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-16 08:05:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2024-11-16 08:05:39,764 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2024-11-16 08:05:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 08:05:39,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 08:05:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 08:05:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 08:05:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 08:05:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 08:05:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-16 08:05:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-16 08:05:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-16 08:05:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 08:05:39,872 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 08:05:39,876 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 08:05:40,092 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L76: call ULTIMATE.dealloc(main_~#n~0#1.base, main_~#n~0#1.offset);havoc main_~#n~0#1.base, main_~#n~0#1.offset;call ULTIMATE.dealloc(main_~#a~0#1.base, main_~#a~0#1.offset);havoc main_~#a~0#1.base, main_~#a~0#1.offset;call ULTIMATE.dealloc(main_~#s~0#1.base, main_~#s~0#1.offset);havoc main_~#s~0#1.base, main_~#s~0#1.offset;call ULTIMATE.dealloc(main_~#t~0#1.base, main_~#t~0#1.offset);havoc main_~#t~0#1.base, main_~#t~0#1.offset; [2024-11-16 08:05:40,131 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-16 08:05:40,131 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 08:05:40,145 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 08:05:40,147 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 08:05:40,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:05:40 BoogieIcfgContainer [2024-11-16 08:05:40,148 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 08:05:40,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 08:05:40,151 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 08:05:40,154 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 08:05:40,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:05:39" (1/3) ... [2024-11-16 08:05:40,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287df10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:05:40, skipping insertion in model container [2024-11-16 08:05:40,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:05:39" (2/3) ... [2024-11-16 08:05:40,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287df10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:05:40, skipping insertion in model container [2024-11-16 08:05:40,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 08:05:40" (3/3) ... [2024-11-16 08:05:40,158 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2024-11-16 08:05:40,178 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 08:05:40,180 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 08:05:40,247 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 08:05:40,255 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;@474e6668, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 08:05:40,255 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 08:05:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-16 08:05:40,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-16 08:05:40,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:05:40,268 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:05:40,268 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:05:40,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:05:40,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1986512791, now seen corresponding path program 1 times [2024-11-16 08:05:40,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:05:40,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495476780] [2024-11-16 08:05:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:05:40,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:05:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:05:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:05:41,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:05:41,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495476780] [2024-11-16 08:05:41,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495476780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 08:05:41,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 08:05:41,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-16 08:05:41,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573755823] [2024-11-16 08:05:41,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:05:41,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 08:05:41,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:05:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 08:05:41,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-16 08:05:41,143 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 08:05:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:05:41,421 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2024-11-16 08:05:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 08:05:41,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-16 08:05:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:05:41,455 INFO L225 Difference]: With dead ends: 79 [2024-11-16 08:05:41,455 INFO L226 Difference]: Without dead ends: 46 [2024-11-16 08:05:41,469 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-16 08:05:41,498 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 08:05:41,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 08:05:41,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-16 08:05:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2024-11-16 08:05:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-16 08:05:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-11-16 08:05:41,548 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 10 [2024-11-16 08:05:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:05:41,550 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-11-16 08:05:41,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 08:05:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-11-16 08:05:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-16 08:05:41,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:05:41,553 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:05:41,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 08:05:41,553 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:05:41,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:05:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash -300099203, now seen corresponding path program 1 times [2024-11-16 08:05:41,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:05:41,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514467122] [2024-11-16 08:05:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:05:41,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:05:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:05:41,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824209754] [2024-11-16 08:05:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:05:41,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:05:41,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:05:41,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:05:41,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 08:05:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:05:41,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-16 08:05:41,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:05:41,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:05:41,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:05:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:05:41,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:05:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:05:42,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:05:42,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514467122] [2024-11-16 08:05:42,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:05:42,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824209754] [2024-11-16 08:05:42,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824209754] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-16 08:05:42,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 08:05:42,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-11-16 08:05:42,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799738259] [2024-11-16 08:05:42,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:05:42,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 08:05:42,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:05:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 08:05:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-16 08:05:42,187 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:05:43,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-16 08:05:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:05:43,729 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-11-16 08:05:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 08:05:43,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-16 08:05:43,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:05:43,731 INFO L225 Difference]: With dead ends: 53 [2024-11-16 08:05:43,731 INFO L226 Difference]: Without dead ends: 50 [2024-11-16 08:05:43,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-16 08:05:43,732 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-16 08:05:43,732 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 141 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-16 08:05:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-16 08:05:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2024-11-16 08:05:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.1) internal successors, (33), 32 states have internal predecessors, (33), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-16 08:05:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-11-16 08:05:43,757 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 16 [2024-11-16 08:05:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:05:43,757 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-11-16 08:05:43,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-16 08:05:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-11-16 08:05:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-16 08:05:43,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:05:43,758 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:05:43,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 08:05:43,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:05:43,960 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:05:43,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:05:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1837633569, now seen corresponding path program 1 times [2024-11-16 08:05:43,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:05:43,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001129664] [2024-11-16 08:05:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:05:43,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:05:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:05:44,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720930577] [2024-11-16 08:05:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:05:44,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:05:44,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:05:44,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:05:44,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 08:05:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:05:44,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-16 08:05:44,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:05:44,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:05:44,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:05:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 08:05:44,508 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:05:44,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-11-16 08:05:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 08:05:44,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:05:44,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001129664] [2024-11-16 08:05:44,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:05:44,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720930577] [2024-11-16 08:05:44,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720930577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:05:44,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:05:44,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-11-16 08:05:44,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987672825] [2024-11-16 08:05:44,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:05:44,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 08:05:44,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:05:44,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 08:05:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-11-16 08:05:44,859 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 22 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-16 08:05:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:05:46,206 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2024-11-16 08:05:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-16 08:05:46,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-11-16 08:05:46,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:05:46,213 INFO L225 Difference]: With dead ends: 86 [2024-11-16 08:05:46,214 INFO L226 Difference]: Without dead ends: 83 [2024-11-16 08:05:46,215 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-11-16 08:05:46,217 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-16 08:05:46,217 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 135 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-16 08:05:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-16 08:05:46,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2024-11-16 08:05:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.1) internal successors, (55), 53 states have internal predecessors, (55), 18 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2024-11-16 08:05:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2024-11-16 08:05:46,253 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 22 [2024-11-16 08:05:46,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:05:46,253 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2024-11-16 08:05:46,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-16 08:05:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2024-11-16 08:05:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 08:05:46,255 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:05:46,255 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:05:46,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 08:05:46,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-16 08:05:46,456 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:05:46,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:05:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1619287435, now seen corresponding path program 1 times [2024-11-16 08:05:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:05:46,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254895062] [2024-11-16 08:05:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:05:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:05:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:05:47,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-16 08:05:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:05:47,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-16 08:05:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:05:47,256 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-16 08:05:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:05:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 08:05:47,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:05:47,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254895062] [2024-11-16 08:05:47,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254895062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:05:47,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129949428] [2024-11-16 08:05:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:05:47,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:05:47,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:05:47,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:05:47,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 08:05:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:05:47,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-16 08:05:47,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:05:47,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 08:05:47,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:05:47,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:05:47,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:05:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 08:05:47,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:05:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 08:05:52,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129949428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:05:52,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 08:05:52,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 10] total 26 [2024-11-16 08:05:52,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267961923] [2024-11-16 08:05:52,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 08:05:52,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 08:05:52,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:05:52,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 08:05:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=563, Unknown=1, NotChecked=0, Total=650 [2024-11-16 08:05:52,384 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 26 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 10 states have call successors, (17), 9 states have call predecessors, (17), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-16 08:05:58,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-16 08:06:03,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-16 08:06:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:06:04,131 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2024-11-16 08:06:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-16 08:06:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 10 states have call successors, (17), 9 states have call predecessors, (17), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) Word has length 32 [2024-11-16 08:06:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:06:04,133 INFO L225 Difference]: With dead ends: 93 [2024-11-16 08:06:04,133 INFO L226 Difference]: Without dead ends: 90 [2024-11-16 08:06:04,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=194, Invalid=1137, Unknown=1, NotChecked=0, Total=1332 [2024-11-16 08:06:04,135 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 65 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2024-11-16 08:06:04,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 200 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 505 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2024-11-16 08:06:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-16 08:06:04,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2024-11-16 08:06:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 58 states have internal predecessors, (60), 18 states have call successors, (18), 10 states have call predecessors, (18), 13 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-16 08:06:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2024-11-16 08:06:04,156 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 32 [2024-11-16 08:06:04,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:06:04,157 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2024-11-16 08:06:04,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 10 states have call successors, (17), 9 states have call predecessors, (17), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-16 08:06:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2024-11-16 08:06:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-16 08:06:04,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:06:04,158 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:06:04,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 08:06:04,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:04,362 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:06:04,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:06:04,362 INFO L85 PathProgramCache]: Analyzing trace with hash 995228958, now seen corresponding path program 1 times [2024-11-16 08:06:04,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:06:04,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609447175] [2024-11-16 08:06:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:04,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:06:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:04,800 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:06:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:04,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:06:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:04,989 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 08:06:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:04,993 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 08:06:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 08:06:04,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:06:04,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609447175] [2024-11-16 08:06:04,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609447175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 08:06:04,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 08:06:04,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-16 08:06:04,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652987453] [2024-11-16 08:06:04,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 08:06:04,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 08:06:04,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:06:04,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 08:06:04,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-16 08:06:04,998 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 08:06:05,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:06:05,823 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2024-11-16 08:06:05,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 08:06:05,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-11-16 08:06:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:06:05,825 INFO L225 Difference]: With dead ends: 94 [2024-11-16 08:06:05,825 INFO L226 Difference]: Without dead ends: 91 [2024-11-16 08:06:05,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-16 08:06:05,826 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-16 08:06:05,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 63 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-16 08:06:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-16 08:06:05,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-16 08:06:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 61 states have internal predecessors, (63), 18 states have call successors, (18), 11 states have call predecessors, (18), 14 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22) [2024-11-16 08:06:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2024-11-16 08:06:05,844 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 32 [2024-11-16 08:06:05,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:06:05,844 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2024-11-16 08:06:05,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-16 08:06:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2024-11-16 08:06:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-16 08:06:05,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:06:05,846 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:06:05,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 08:06:05,846 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:06:05,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:06:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1059465329, now seen corresponding path program 2 times [2024-11-16 08:06:05,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:06:05,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744291679] [2024-11-16 08:06:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:05,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:06:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:06:05,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887710881] [2024-11-16 08:06:05,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 08:06:05,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:05,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:06:05,870 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:06:05,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 08:06:05,964 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 08:06:05,964 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:06:05,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-16 08:06:05,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:06:05,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:06,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:08,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:06:08,369 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-16 08:06:08,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-11-16 08:06:08,512 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-11-16 08:06:08,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-11-16 08:06:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-16 08:06:09,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:06:11,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2024-11-16 08:06:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-16 08:06:11,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:06:11,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744291679] [2024-11-16 08:06:11,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:06:11,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887710881] [2024-11-16 08:06:11,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887710881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:06:11,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:06:11,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 28 [2024-11-16 08:06:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810429109] [2024-11-16 08:06:11,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:06:11,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-16 08:06:11,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:06:11,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-16 08:06:11,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-11-16 08:06:11,574 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 28 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 23 states have internal predecessors, (42), 11 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-16 08:06:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:06:18,481 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2024-11-16 08:06:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-16 08:06:18,481 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 23 states have internal predecessors, (42), 11 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 38 [2024-11-16 08:06:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:06:18,483 INFO L225 Difference]: With dead ends: 122 [2024-11-16 08:06:18,483 INFO L226 Difference]: Without dead ends: 119 [2024-11-16 08:06:18,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=318, Invalid=2034, Unknown=0, NotChecked=0, Total=2352 [2024-11-16 08:06:18,484 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 80 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-16 08:06:18,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 295 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-16 08:06:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-16 08:06:18,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2024-11-16 08:06:18,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.082191780821918) internal successors, (79), 76 states have internal predecessors, (79), 21 states have call successors, (21), 15 states have call predecessors, (21), 18 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2024-11-16 08:06:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2024-11-16 08:06:18,525 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 38 [2024-11-16 08:06:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:06:18,526 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2024-11-16 08:06:18,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 23 states have internal predecessors, (42), 11 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-16 08:06:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2024-11-16 08:06:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-16 08:06:18,527 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:06:18,527 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 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, 1] [2024-11-16 08:06:18,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 08:06:18,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:18,728 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:06:18,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:06:18,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1088586141, now seen corresponding path program 1 times [2024-11-16 08:06:18,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:06:18,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994312709] [2024-11-16 08:06:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:18,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:06:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:06:18,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865538487] [2024-11-16 08:06:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:18,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:06:18,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:06:18,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 08:06:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:18,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-16 08:06:18,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:06:18,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:18,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 08:06:19,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:06:20,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:06:20,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994312709] [2024-11-16 08:06:20,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:06:20,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865538487] [2024-11-16 08:06:20,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865538487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:06:20,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 08:06:20,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-16 08:06:20,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810301419] [2024-11-16 08:06:20,281 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 08:06:20,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 08:06:20,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:06:20,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 08:06:20,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-16 08:06:20,282 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 08:06:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:06:21,510 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2024-11-16 08:06:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 08:06:21,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-16 08:06:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:06:21,512 INFO L225 Difference]: With dead ends: 123 [2024-11-16 08:06:21,512 INFO L226 Difference]: Without dead ends: 118 [2024-11-16 08:06:21,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-16 08:06:21,513 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-16 08:06:21,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 156 Invalid, 2 Unknown, 0 Unchecked, 0.9s Time] [2024-11-16 08:06:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-16 08:06:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2024-11-16 08:06:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 77 states have internal predecessors, (80), 21 states have call successors, (21), 16 states have call predecessors, (21), 18 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2024-11-16 08:06:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2024-11-16 08:06:21,552 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 38 [2024-11-16 08:06:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:06:21,552 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2024-11-16 08:06:21,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-16 08:06:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2024-11-16 08:06:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-16 08:06:21,555 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:06:21,555 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2024-11-16 08:06:21,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 08:06:21,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:21,756 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:06:21,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:06:21,756 INFO L85 PathProgramCache]: Analyzing trace with hash -683679450, now seen corresponding path program 1 times [2024-11-16 08:06:21,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:06:21,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476236012] [2024-11-16 08:06:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:21,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:06:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:06:21,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665296323] [2024-11-16 08:06:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:21,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:21,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:06:21,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:06:21,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 08:06:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:21,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-16 08:06:21,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:06:21,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:21,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-16 08:06:22,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:06:23,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:06:23,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476236012] [2024-11-16 08:06:23,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:06:23,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665296323] [2024-11-16 08:06:23,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665296323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:06:23,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 08:06:23,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-16 08:06:23,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532029101] [2024-11-16 08:06:23,620 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 08:06:23,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-16 08:06:23,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:06:23,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-16 08:06:23,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-16 08:06:23,621 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 08:06:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:06:24,686 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2024-11-16 08:06:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 08:06:24,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2024-11-16 08:06:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:06:24,687 INFO L225 Difference]: With dead ends: 118 [2024-11-16 08:06:24,688 INFO L226 Difference]: Without dead ends: 97 [2024-11-16 08:06:24,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-16 08:06:24,689 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-16 08:06:24,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 63 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-16 08:06:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-16 08:06:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-11-16 08:06:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 65 states have internal predecessors, (67), 18 states have call successors, (18), 13 states have call predecessors, (18), 15 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2024-11-16 08:06:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2024-11-16 08:06:24,716 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 44 [2024-11-16 08:06:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:06:24,716 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2024-11-16 08:06:24,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-16 08:06:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2024-11-16 08:06:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-16 08:06:24,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:06:24,718 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:06:24,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 08:06:24,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:24,919 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:06:24,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:06:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2084998935, now seen corresponding path program 1 times [2024-11-16 08:06:24,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:06:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259550781] [2024-11-16 08:06:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:24,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:06:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:25,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:06:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:27,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:06:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:27,661 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 08:06:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:27,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 08:06:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:27,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-16 08:06:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:27,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-16 08:06:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:27,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-16 08:06:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:27,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-16 08:06:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-16 08:06:27,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:06:27,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259550781] [2024-11-16 08:06:27,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259550781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:06:27,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582448742] [2024-11-16 08:06:27,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:27,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:27,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:06:27,981 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:06:27,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 08:06:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:28,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-16 08:06:28,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:06:28,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:28,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:29,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:06:29,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:06:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-16 08:06:29,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:06:31,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-16 08:06:31,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582448742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:06:31,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:06:31,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2024-11-16 08:06:31,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294799774] [2024-11-16 08:06:31,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:06:31,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-16 08:06:31,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:06:31,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-16 08:06:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-16 08:06:31,801 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 19 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-16 08:06:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:06:34,199 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2024-11-16 08:06:34,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 08:06:34,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) Word has length 56 [2024-11-16 08:06:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:06:34,201 INFO L225 Difference]: With dead ends: 104 [2024-11-16 08:06:34,201 INFO L226 Difference]: Without dead ends: 101 [2024-11-16 08:06:34,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2024-11-16 08:06:34,202 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-16 08:06:34,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 96 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-16 08:06:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-16 08:06:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-16 08:06:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 68 states have internal predecessors, (70), 18 states have call successors, (18), 14 states have call predecessors, (18), 16 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2024-11-16 08:06:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2024-11-16 08:06:34,226 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 56 [2024-11-16 08:06:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:06:34,227 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2024-11-16 08:06:34,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-16 08:06:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2024-11-16 08:06:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-16 08:06:34,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:06:34,228 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 08:06:34,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-16 08:06:34,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:34,429 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:06:34,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:06:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1030991342, now seen corresponding path program 1 times [2024-11-16 08:06:34,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:06:34,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893584207] [2024-11-16 08:06:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:34,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:06:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:06:34,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039245637] [2024-11-16 08:06:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:34,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:34,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:06:34,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:06:34,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 08:06:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 08:06:34,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-16 08:06:34,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:06:34,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:34,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:34,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:37,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:06:37,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:06:37,584 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-11-16 08:06:37,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2024-11-16 08:06:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 58 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 08:06:39,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:06:46,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:06:46,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893584207] [2024-11-16 08:06:46,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:06:46,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039245637] [2024-11-16 08:06:46,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039245637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 08:06:46,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-16 08:06:46,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-16 08:06:46,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896357085] [2024-11-16 08:06:46,802 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-16 08:06:46,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-16 08:06:46,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:06:46,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-16 08:06:46,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=716, Unknown=1, NotChecked=0, Total=812 [2024-11-16 08:06:46,804 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 22 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-16 08:06:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 08:06:53,093 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2024-11-16 08:06:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-16 08:06:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 62 [2024-11-16 08:06:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 08:06:53,095 INFO L225 Difference]: With dead ends: 111 [2024-11-16 08:06:53,095 INFO L226 Difference]: Without dead ends: 106 [2024-11-16 08:06:53,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=266, Invalid=1895, Unknown=1, NotChecked=0, Total=2162 [2024-11-16 08:06:53,097 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 27 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-16 08:06:53,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 82 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 576 Invalid, 14 Unknown, 0 Unchecked, 3.1s Time] [2024-11-16 08:06:53,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-16 08:06:53,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2024-11-16 08:06:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 69 states have internal predecessors, (71), 18 states have call successors, (18), 15 states have call predecessors, (18), 16 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2024-11-16 08:06:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2024-11-16 08:06:53,121 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 62 [2024-11-16 08:06:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 08:06:53,121 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2024-11-16 08:06:53,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 7 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-16 08:06:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2024-11-16 08:06:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-16 08:06:53,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 08:06:53,122 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-16 08:06:53,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 08:06:53,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-16 08:06:53,327 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 08:06:53,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 08:06:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash 916287753, now seen corresponding path program 3 times [2024-11-16 08:06:53,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 08:06:53,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936316369] [2024-11-16 08:06:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 08:06:53,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 08:06:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-16 08:06:53,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531314533] [2024-11-16 08:06:53,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 08:06:53,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 08:06:53,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 08:06:53,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 08:06:53,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 08:06:53,502 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 08:06:53,502 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 08:06:53,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-16 08:06:53,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 08:06:53,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:53,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:53,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-16 08:06:55,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:06:55,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-16 08:06:55,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:06:56,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:06:56,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-16 08:06:56,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-16 08:06:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-16 08:06:58,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 08:07:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-16 08:07:06,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 08:07:06,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936316369] [2024-11-16 08:07:06,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-16 08:07:06,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531314533] [2024-11-16 08:07:06,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531314533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 08:07:06,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-16 08:07:06,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2024-11-16 08:07:06,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693362636] [2024-11-16 08:07:06,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-16 08:07:06,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-16 08:07:06,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 08:07:06,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-16 08:07:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=710, Unknown=1, NotChecked=0, Total=812 [2024-11-16 08:07:06,503 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 29 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 12 states have call successors, (20), 10 states have call predecessors, (20), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13)