./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f 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_cohencu-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 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 21:02:24,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 21:02:24,689 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 21:02:24,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 21:02:24,696 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 21:02:24,728 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 21:02:24,729 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 21:02:24,729 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 21:02:24,730 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 21:02:24,731 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 21:02:24,732 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 21:02:24,732 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 21:02:24,733 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 21:02:24,736 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 21:02:24,736 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 21:02:24,737 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 21:02:24,737 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 21:02:24,737 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 21:02:24,737 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 21:02:24,738 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 21:02:24,738 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 21:02:24,738 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 21:02:24,739 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 21:02:24,739 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 21:02:24,739 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 21:02:24,739 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 21:02:24,740 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 21:02:24,740 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 21:02:24,740 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 21:02:24,740 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 21:02:24,741 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 21:02:24,741 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 21:02:24,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 21:02:24,741 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 21:02:24,742 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 21:02:24,742 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 21:02:24,742 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 21:02:24,742 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 21:02:24,743 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 21:02:24,744 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 21:02:24,744 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 21:02:24,744 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 21:02:24,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a [2024-11-11 21:02:25,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 21:02:25,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 21:02:25,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 21:02:25,047 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 21:02:25,047 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 21:02:25,048 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-11-11 21:02:26,528 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 21:02:26,717 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 21:02:26,718 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-11-11 21:02:26,729 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c454e8bf8/e17ecc7e976b4f8bbc726e5fb315d604/FLAG61768e821 [2024-11-11 21:02:26,745 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c454e8bf8/e17ecc7e976b4f8bbc726e5fb315d604 [2024-11-11 21:02:26,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 21:02:26,750 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 21:02:26,753 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 21:02:26,754 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 21:02:26,760 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 21:02:26,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:02:26" (1/1) ... [2024-11-11 21:02:26,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f27fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:26, skipping insertion in model container [2024-11-11 21:02:26,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:02:26" (1/1) ... [2024-11-11 21:02:26,789 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 21:02:26,968 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_cohencu-ll.c[1124,1137] [2024-11-11 21:02:27,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 21:02:27,016 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 21:02:27,030 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_cohencu-ll.c[1124,1137] [2024-11-11 21:02:27,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 21:02:27,082 INFO L204 MainTranslator]: Completed translation [2024-11-11 21:02:27,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27 WrapperNode [2024-11-11 21:02:27,084 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 21:02:27,085 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 21:02:27,085 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 21:02:27,085 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 21:02:27,093 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,106 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,136 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 106 [2024-11-11 21:02:27,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 21:02:27,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 21:02:27,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 21:02:27,140 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 21:02:27,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,159 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,178 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 12, 5, 21, 15, 11]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 2, 1, 2, 2, 2]. [2024-11-11 21:02:27,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,185 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,187 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 21:02:27,199 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 21:02:27,199 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 21:02:27,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 21:02:27,204 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (1/1) ... [2024-11-11 21:02:27,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 21:02:27,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:27,232 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) [2024-11-11 21:02:27,234 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 [2024-11-11 21:02:27,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 21:02:27,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 21:02:27,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 21:02:27,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 21:02:27,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-11 21:02:27,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-11 21:02:27,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-11 21:02:27,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-11 21:02:27,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 21:02:27,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 21:02:27,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 21:02:27,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-11 21:02:27,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-11 21:02:27,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-11 21:02:27,277 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2024-11-11 21:02:27,277 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2024-11-11 21:02:27,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 21:02:27,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 21:02:27,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 21:02:27,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 21:02:27,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 21:02:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-11 21:02:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-11 21:02:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-11 21:02:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 21:02:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 21:02:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-11 21:02:27,390 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 21:02:27,392 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 21:02:27,656 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-11 21:02:27,657 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 21:02:27,671 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 21:02:27,671 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-11 21:02:27,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:02:27 BoogieIcfgContainer [2024-11-11 21:02:27,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 21:02:27,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 21:02:27,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 21:02:27,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 21:02:27,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:02:26" (1/3) ... [2024-11-11 21:02:27,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7860f124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:02:27, skipping insertion in model container [2024-11-11 21:02:27,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:02:27" (2/3) ... [2024-11-11 21:02:27,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7860f124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:02:27, skipping insertion in model container [2024-11-11 21:02:27,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:02:27" (3/3) ... [2024-11-11 21:02:27,680 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2024-11-11 21:02:27,698 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 21:02:27,698 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 21:02:27,783 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 21:02:27,792 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;@bc521e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 21:02:27,793 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 21:02:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-11 21:02:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-11 21:02:27,804 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:27,804 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:27,805 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:02:27,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:27,812 INFO L85 PathProgramCache]: Analyzing trace with hash 252415097, now seen corresponding path program 1 times [2024-11-11 21:02:27,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:27,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584984188] [2024-11-11 21:02:27,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:27,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:28,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:28,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584984188] [2024-11-11 21:02:28,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584984188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:02:28,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:02:28,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-11 21:02:28,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295580838] [2024-11-11 21:02:28,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:02:28,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 21:02:28,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 21:02:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-11 21:02:28,760 INFO L87 Difference]: Start difference. First operand has 41 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2024-11-11 21:02:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:29,087 INFO L93 Difference]: Finished difference Result 99 states and 149 transitions. [2024-11-11 21:02:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 21:02:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 9 [2024-11-11 21:02:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:29,097 INFO L225 Difference]: With dead ends: 99 [2024-11-11 21:02:29,097 INFO L226 Difference]: Without dead ends: 57 [2024-11-11 21:02:29,102 INFO L434 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 [2024-11-11 21:02:29,106 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:29,107 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 222 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 21:02:29,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-11 21:02:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-11 21:02:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-11-11 21:02:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2024-11-11 21:02:29,151 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 9 [2024-11-11 21:02:29,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:29,152 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2024-11-11 21:02:29,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2024-11-11 21:02:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2024-11-11 21:02:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-11 21:02:29,153 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:29,153 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:29,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 21:02:29,154 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:02:29,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:29,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1306217988, now seen corresponding path program 1 times [2024-11-11 21:02:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:29,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526671617] [2024-11-11 21:02:29,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:02:29,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345783492] [2024-11-11 21:02:29,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:29,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:29,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:29,193 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) [2024-11-11 21:02:29,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 21:02:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:29,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-11 21:02:29,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:02:29,345 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 [2024-11-11 21:02:29,353 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 [2024-11-11 21:02:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:29,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:02:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 21:02:29,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:29,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526671617] [2024-11-11 21:02:29,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:02:29,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345783492] [2024-11-11 21:02:29,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345783492] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-11 21:02:29,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-11 21:02:29,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 10 [2024-11-11 21:02:29,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769247252] [2024-11-11 21:02:29,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:02:29,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 21:02:29,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 21:02:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-11 21:02:29,713 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (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) [2024-11-11 21:02:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:29,930 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-11-11 21:02:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 21:02:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (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 15 [2024-11-11 21:02:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:29,932 INFO L225 Difference]: With dead ends: 63 [2024-11-11 21:02:29,933 INFO L226 Difference]: Without dead ends: 61 [2024-11-11 21:02:29,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-11 21:02:29,934 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:29,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 215 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 21:02:29,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-11 21:02:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-11-11 21:02:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 38 states have internal predecessors, (39), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-11-11 21:02:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-11-11 21:02:29,946 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 15 [2024-11-11 21:02:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:29,946 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-11-11 21:02:29,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (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) [2024-11-11 21:02:29,947 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-11-11 21:02:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-11 21:02:29,947 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:29,947 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:29,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-11 21:02:30,151 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 [2024-11-11 21:02:30,152 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:02:30,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:30,153 INFO L85 PathProgramCache]: Analyzing trace with hash 979710525, now seen corresponding path program 1 times [2024-11-11 21:02:30,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:30,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622292065] [2024-11-11 21:02:30,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:30,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:02:30,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456950493] [2024-11-11 21:02:30,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:30,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:30,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:30,183 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) [2024-11-11 21:02:30,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 21:02:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:30,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-11 21:02:30,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:02:30,296 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 [2024-11-11 21:02:30,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-11 21:02:30,308 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 [2024-11-11 21:02:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 21:02:30,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:02:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 21:02:31,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:31,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622292065] [2024-11-11 21:02:31,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:02:31,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456950493] [2024-11-11 21:02:31,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456950493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:02:31,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:02:31,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-11-11 21:02:31,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510545504] [2024-11-11 21:02:31,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:02:31,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-11 21:02:31,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-11 21:02:31,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-11 21:02:31,022 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 21:02:35,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-11 21:02:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:35,896 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2024-11-11 21:02:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-11 21:02:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (8), 5 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 21 [2024-11-11 21:02:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:35,897 INFO L225 Difference]: With dead ends: 84 [2024-11-11 21:02:35,897 INFO L226 Difference]: Without dead ends: 82 [2024-11-11 21:02:35,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2024-11-11 21:02:35,899 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:35,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 170 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 507 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-11-11 21:02:35,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-11 21:02:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-11-11 21:02:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2024-11-11 21:02:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2024-11-11 21:02:35,926 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 21 [2024-11-11 21:02:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:35,926 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2024-11-11 21:02:35,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 18 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 21:02:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2024-11-11 21:02:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-11 21:02:35,928 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:35,928 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:35,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 21:02:36,132 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 [2024-11-11 21:02:36,133 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:02:36,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash 574719676, now seen corresponding path program 1 times [2024-11-11 21:02:36,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:36,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824256269] [2024-11-11 21:02:36,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:36,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:02:36,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133689218] [2024-11-11 21:02:36,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:36,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:36,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:36,159 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) [2024-11-11 21:02:36,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 21:02:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:36,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-11 21:02:36,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:02:36,273 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 [2024-11-11 21:02:36,279 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 [2024-11-11 21:02:36,287 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 [2024-11-11 21:02:36,295 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 [2024-11-11 21:02:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 21:02:36,845 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:02:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 21:02:37,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824256269] [2024-11-11 21:02:37,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:02:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133689218] [2024-11-11 21:02:37,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133689218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:02:37,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:02:37,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-11-11 21:02:37,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990411748] [2024-11-11 21:02:37,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:02:37,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-11 21:02:37,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:37,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-11 21:02:37,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-11 21:02:37,578 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 21 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-11 21:02:43,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-11 21:02:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:44,283 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2024-11-11 21:02:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-11 21:02:44,284 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2024-11-11 21:02:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:44,287 INFO L225 Difference]: With dead ends: 110 [2024-11-11 21:02:44,287 INFO L226 Difference]: Without dead ends: 108 [2024-11-11 21:02:44,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2024-11-11 21:02:44,288 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:44,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 129 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 457 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2024-11-11 21:02:44,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-11 21:02:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2024-11-11 21:02:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.078125) internal successors, (69), 67 states have internal predecessors, (69), 30 states have call successors, (30), 10 states have call predecessors, (30), 11 states have return successors, (31), 29 states have call predecessors, (31), 28 states have call successors, (31) [2024-11-11 21:02:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2024-11-11 21:02:44,322 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 27 [2024-11-11 21:02:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:44,322 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2024-11-11 21:02:44,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-11 21:02:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2024-11-11 21:02:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-11 21:02:44,323 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:44,323 INFO L218 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] [2024-11-11 21:02:44,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-11 21:02:44,527 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 [2024-11-11 21:02:44,528 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:02:44,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:44,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2108880647, now seen corresponding path program 1 times [2024-11-11 21:02:44,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:44,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801501077] [2024-11-11 21:02:44,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:44,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:02:44,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791016330] [2024-11-11 21:02:44,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:44,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:44,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:44,550 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) [2024-11-11 21:02:44,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 21:02:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:44,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-11 21:02:44,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:02:44,661 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 [2024-11-11 21:02:44,676 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 [2024-11-11 21:02:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 21:02:46,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:02:46,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2024-11-11 21:02:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 21:02:47,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:47,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801501077] [2024-11-11 21:02:47,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:02:47,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791016330] [2024-11-11 21:02:47,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791016330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:02:47,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:02:47,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-11-11 21:02:47,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393768221] [2024-11-11 21:02:47,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:02:47,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-11 21:02:47,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:02:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-11 21:02:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-11-11 21:02:47,146 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 21:02:56,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-11 21:02:56,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:02:56,590 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2024-11-11 21:02:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-11 21:02:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 33 [2024-11-11 21:02:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:02:56,592 INFO L225 Difference]: With dead ends: 119 [2024-11-11 21:02:56,592 INFO L226 Difference]: Without dead ends: 117 [2024-11-11 21:02:56,593 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-11-11 21:02:56,596 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-11-11 21:02:56,597 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 151 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 587 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2024-11-11 21:02:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-11 21:02:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2024-11-11 21:02:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 73 states have internal predecessors, (75), 30 states have call successors, (30), 12 states have call predecessors, (30), 13 states have return successors, (31), 29 states have call predecessors, (31), 28 states have call successors, (31) [2024-11-11 21:02:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2024-11-11 21:02:56,628 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 33 [2024-11-11 21:02:56,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:02:56,631 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2024-11-11 21:02:56,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 21:02:56,631 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2024-11-11 21:02:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-11 21:02:56,634 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:02:56,634 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:02:56,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 21:02:56,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:56,839 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:02:56,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:02:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1839768368, now seen corresponding path program 1 times [2024-11-11 21:02:56,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:02:56,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017123745] [2024-11-11 21:02:56,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:56,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:02:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:57,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-11 21:02:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:57,949 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-11 21:02:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:57,955 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-11 21:02:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:57,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-11 21:02:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:57,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-11 21:02:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-11 21:02:57,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:02:57,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017123745] [2024-11-11 21:02:57,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017123745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:02:57,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402075985] [2024-11-11 21:02:57,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:02:57,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:02:57,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:02:57,983 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) [2024-11-11 21:02:57,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 21:02:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:02:58,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-11 21:02:58,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:02:59,040 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 33 treesize of output 21 [2024-11-11 21:02:59,047 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 31 treesize of output 19 [2024-11-11 21:02:59,134 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 23 treesize of output 15 [2024-11-11 21:02:59,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-11 21:02:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 21:02:59,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-11 21:03:04,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402075985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:03:04,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 21:03:04,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-11-11 21:03:04,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729897743] [2024-11-11 21:03:04,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:04,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-11 21:03:04,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-11 21:03:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-11-11 21:03:04,127 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (15), 2 states have call predecessors, (15), 4 states have call successors, (15) [2024-11-11 21:03:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:07,439 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2024-11-11 21:03:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-11 21:03:07,440 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (15), 2 states have call predecessors, (15), 4 states have call successors, (15) Word has length 43 [2024-11-11 21:03:07,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:07,441 INFO L225 Difference]: With dead ends: 124 [2024-11-11 21:03:07,441 INFO L226 Difference]: Without dead ends: 122 [2024-11-11 21:03:07,442 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-11-11 21:03:07,442 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:07,443 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 177 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-11 21:03:07,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-11 21:03:07,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-11 21:03:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 78 states have internal predecessors, (80), 30 states have call successors, (30), 13 states have call predecessors, (30), 16 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2024-11-11 21:03:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2024-11-11 21:03:07,470 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 43 [2024-11-11 21:03:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:07,470 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2024-11-11 21:03:07,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (15), 2 states have call predecessors, (15), 4 states have call successors, (15) [2024-11-11 21:03:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2024-11-11 21:03:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-11 21:03:07,472 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:07,472 INFO L218 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] [2024-11-11 21:03:07,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 21:03:07,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:07,673 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:07,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:07,674 INFO L85 PathProgramCache]: Analyzing trace with hash -262292946, now seen corresponding path program 1 times [2024-11-11 21:03:07,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:07,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040895885] [2024-11-11 21:03:07,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:07,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:08,157 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:03:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:08,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:03:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:08,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 21:03:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:08,296 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 21:03:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:08,301 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-11 21:03:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:08,305 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-11 21:03:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-11 21:03:08,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:08,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040895885] [2024-11-11 21:03:08,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040895885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:03:08,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:03:08,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-11 21:03:08,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605046218] [2024-11-11 21:03:08,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:03:08,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 21:03:08,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 21:03:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-11 21:03:08,313 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-11 21:03:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:09,143 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2024-11-11 21:03:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 21:03:09,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-11 21:03:09,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:09,144 INFO L225 Difference]: With dead ends: 128 [2024-11-11 21:03:09,144 INFO L226 Difference]: Without dead ends: 126 [2024-11-11 21:03:09,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-11 21:03:09,145 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:09,145 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 100 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 21:03:09,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-11 21:03:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-11 21:03:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 78 states have (on average 1.064102564102564) internal successors, (83), 81 states have internal predecessors, (83), 30 states have call successors, (30), 14 states have call predecessors, (30), 17 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2024-11-11 21:03:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 147 transitions. [2024-11-11 21:03:09,187 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 147 transitions. Word has length 43 [2024-11-11 21:03:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:09,187 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 147 transitions. [2024-11-11 21:03:09,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-11 21:03:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 147 transitions. [2024-11-11 21:03:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-11 21:03:09,188 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:09,189 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:09,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-11 21:03:09,189 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:09,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:09,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1536337171, now seen corresponding path program 2 times [2024-11-11 21:03:09,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:09,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591668230] [2024-11-11 21:03:09,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:09,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:09,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809612632] [2024-11-11 21:03:09,224 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 21:03:09,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:09,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:09,226 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) [2024-11-11 21:03:09,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 21:03:09,350 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 21:03:09,350 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:03:09,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-11 21:03:09,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:09,375 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 [2024-11-11 21:03:09,392 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 [2024-11-11 21:03:09,407 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 [2024-11-11 21:03:11,076 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 [2024-11-11 21:03:11,095 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 [2024-11-11 21:03:11,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-11 21:03:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-11 21:03:11,788 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-11 21:03:13,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:13,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591668230] [2024-11-11 21:03:13,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:13,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809612632] [2024-11-11 21:03:13,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809612632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:03:13,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:03:13,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2024-11-11 21:03:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735093373] [2024-11-11 21:03:13,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:13,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-11 21:03:13,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:13,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-11 21:03:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-11-11 21:03:13,365 INFO L87 Difference]: Start difference. First operand 126 states and 147 transitions. Second operand has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 10 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-11 21:03:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:20,279 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2024-11-11 21:03:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-11 21:03:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 10 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 49 [2024-11-11 21:03:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:20,281 INFO L225 Difference]: With dead ends: 160 [2024-11-11 21:03:20,281 INFO L226 Difference]: Without dead ends: 158 [2024-11-11 21:03:20,283 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2024-11-11 21:03:20,283 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 139 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:20,284 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 302 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-11 21:03:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-11 21:03:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2024-11-11 21:03:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 96 states have (on average 1.0625) internal successors, (102), 99 states have internal predecessors, (102), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-11-11 21:03:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2024-11-11 21:03:20,327 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 49 [2024-11-11 21:03:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:20,327 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2024-11-11 21:03:20,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 10 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-11 21:03:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2024-11-11 21:03:20,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-11 21:03:20,330 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:20,330 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:20,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-11 21:03:20,531 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 [2024-11-11 21:03:20,531 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:20,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:20,532 INFO L85 PathProgramCache]: Analyzing trace with hash -966431251, now seen corresponding path program 1 times [2024-11-11 21:03:20,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:20,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082553910] [2024-11-11 21:03:20,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:20,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:20,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423058506] [2024-11-11 21:03:20,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:20,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:20,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:20,555 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) [2024-11-11 21:03:20,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-11 21:03:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:20,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-11 21:03:20,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:20,690 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 [2024-11-11 21:03:20,702 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 [2024-11-11 21:03:20,724 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 [2024-11-11 21:03:22,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:03:22,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-11 21:03:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 21:03:22,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:23,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082553910] [2024-11-11 21:03:23,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423058506] [2024-11-11 21:03:23,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423058506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:23,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 21:03:23,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-11 21:03:23,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320337148] [2024-11-11 21:03:23,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:23,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 21:03:23,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:23,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 21:03:23,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-11 21:03:23,251 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-11 21:03:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:27,021 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2024-11-11 21:03:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-11 21:03:27,021 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2024-11-11 21:03:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:27,023 INFO L225 Difference]: With dead ends: 162 [2024-11-11 21:03:27,023 INFO L226 Difference]: Without dead ends: 160 [2024-11-11 21:03:27,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2024-11-11 21:03:27,024 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 94 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:27,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 78 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 399 Invalid, 2 Unknown, 0 Unchecked, 1.7s Time] [2024-11-11 21:03:27,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-11 21:03:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2024-11-11 21:03:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 102 states have internal predecessors, (105), 36 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-11-11 21:03:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2024-11-11 21:03:27,069 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 49 [2024-11-11 21:03:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:27,069 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2024-11-11 21:03:27,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-11 21:03:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2024-11-11 21:03:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-11 21:03:27,071 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:27,071 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:27,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-11 21:03:27,275 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 [2024-11-11 21:03:27,276 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:27,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1459603436, now seen corresponding path program 3 times [2024-11-11 21:03:27,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:27,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162002217] [2024-11-11 21:03:27,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:27,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:27,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535450187] [2024-11-11 21:03:27,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 21:03:27,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:27,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:27,309 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) [2024-11-11 21:03:27,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-11 21:03:27,418 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-11 21:03:27,418 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 21:03:27,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-11 21:03:27,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:27,433 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 [2024-11-11 21:03:27,448 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 [2024-11-11 21:03:27,465 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 [2024-11-11 21:03:28,829 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 [2024-11-11 21:03:28,846 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 [2024-11-11 21:03:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-11 21:03:29,548 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-11 21:03:30,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:30,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162002217] [2024-11-11 21:03:30,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:30,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535450187] [2024-11-11 21:03:30,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535450187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:03:30,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:03:30,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-11-11 21:03:30,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803389397] [2024-11-11 21:03:30,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:30,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-11 21:03:30,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:30,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-11 21:03:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-11 21:03:30,440 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-11 21:03:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:34,094 INFO L93 Difference]: Finished difference Result 168 states and 187 transitions. [2024-11-11 21:03:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-11 21:03:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 55 [2024-11-11 21:03:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:34,096 INFO L225 Difference]: With dead ends: 168 [2024-11-11 21:03:34,096 INFO L226 Difference]: Without dead ends: 166 [2024-11-11 21:03:34,096 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2024-11-11 21:03:34,097 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 73 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:34,097 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 369 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-11 21:03:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-11 21:03:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2024-11-11 21:03:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 105 states have internal predecessors, (108), 36 states have call successors, (36), 20 states have call predecessors, (36), 23 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-11-11 21:03:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2024-11-11 21:03:34,133 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 55 [2024-11-11 21:03:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:34,133 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2024-11-11 21:03:34,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 8 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-11 21:03:34,134 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2024-11-11 21:03:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-11 21:03:34,135 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:34,135 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:34,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-11 21:03:34,335 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 [2024-11-11 21:03:34,336 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:34,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:34,336 INFO L85 PathProgramCache]: Analyzing trace with hash 837279594, now seen corresponding path program 1 times [2024-11-11 21:03:34,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:34,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697774058] [2024-11-11 21:03:34,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:34,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:34,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674652735] [2024-11-11 21:03:34,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:34,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:34,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:34,377 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) [2024-11-11 21:03:34,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-11 21:03:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:34,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-11 21:03:34,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:34,509 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 [2024-11-11 21:03:34,523 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 [2024-11-11 21:03:35,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-11 21:03:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-11 21:03:35,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:35,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2024-11-11 21:03:36,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:36,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697774058] [2024-11-11 21:03:36,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:36,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674652735] [2024-11-11 21:03:36,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674652735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:36,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 21:03:36,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-11 21:03:36,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415614077] [2024-11-11 21:03:36,166 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:36,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 21:03:36,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:36,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 21:03:36,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-11 21:03:36,167 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-11 21:03:37,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:37,128 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2024-11-11 21:03:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-11 21:03:37,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2024-11-11 21:03:37,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:37,130 INFO L225 Difference]: With dead ends: 170 [2024-11-11 21:03:37,130 INFO L226 Difference]: Without dead ends: 168 [2024-11-11 21:03:37,130 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-11 21:03:37,131 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 39 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:37,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 95 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 215 Invalid, 3 Unknown, 0 Unchecked, 0.7s Time] [2024-11-11 21:03:37,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-11 21:03:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2024-11-11 21:03:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 105 states have (on average 1.0571428571428572) internal successors, (111), 108 states have internal predecessors, (111), 36 states have call successors, (36), 21 states have call predecessors, (36), 24 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-11-11 21:03:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 186 transitions. [2024-11-11 21:03:37,177 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 186 transitions. Word has length 55 [2024-11-11 21:03:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:37,177 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 186 transitions. [2024-11-11 21:03:37,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-11 21:03:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 186 transitions. [2024-11-11 21:03:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-11 21:03:37,179 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:37,179 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:37,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-11 21:03:37,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:37,380 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:37,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash -335329243, now seen corresponding path program 1 times [2024-11-11 21:03:37,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:37,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096633485] [2024-11-11 21:03:37,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:37,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:37,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109556287] [2024-11-11 21:03:37,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:37,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:37,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:37,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:03:37,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-11 21:03:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:37,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-11 21:03:37,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:37,558 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 [2024-11-11 21:03:37,579 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 [2024-11-11 21:03:37,600 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 [2024-11-11 21:03:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 70 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-11 21:03:38,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:39,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:39,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096633485] [2024-11-11 21:03:39,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:39,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109556287] [2024-11-11 21:03:39,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109556287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:39,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 21:03:39,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-11 21:03:39,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041428528] [2024-11-11 21:03:39,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:39,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 21:03:39,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 21:03:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-11 21:03:39,376 INFO L87 Difference]: Start difference. First operand 166 states and 186 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-11 21:03:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:40,757 INFO L93 Difference]: Finished difference Result 174 states and 192 transitions. [2024-11-11 21:03:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-11 21:03:40,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 61 [2024-11-11 21:03:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:40,759 INFO L225 Difference]: With dead ends: 174 [2024-11-11 21:03:40,759 INFO L226 Difference]: Without dead ends: 172 [2024-11-11 21:03:40,760 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-11 21:03:40,760 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:40,761 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 221 Invalid, 3 Unknown, 0 Unchecked, 1.0s Time] [2024-11-11 21:03:40,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-11 21:03:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-11-11 21:03:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 111 states have internal predecessors, (114), 36 states have call successors, (36), 22 states have call predecessors, (36), 25 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-11-11 21:03:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 189 transitions. [2024-11-11 21:03:40,809 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 189 transitions. Word has length 61 [2024-11-11 21:03:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:40,809 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 189 transitions. [2024-11-11 21:03:40,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-11 21:03:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 189 transitions. [2024-11-11 21:03:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-11 21:03:40,810 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:40,810 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:40,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-11 21:03:41,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-11 21:03:41,011 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:41,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:41,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1784364642, now seen corresponding path program 1 times [2024-11-11 21:03:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:41,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847752164] [2024-11-11 21:03:41,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:41,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:41,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962475744] [2024-11-11 21:03:41,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:41,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:41,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:41,049 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:03:41,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-11 21:03:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:41,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-11 21:03:41,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:41,183 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 [2024-11-11 21:03:41,197 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 [2024-11-11 21:03:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-11 21:03:42,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:43,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847752164] [2024-11-11 21:03:43,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962475744] [2024-11-11 21:03:43,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962475744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:43,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 21:03:43,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-11 21:03:43,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649083445] [2024-11-11 21:03:43,062 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:43,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 21:03:43,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:43,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 21:03:43,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-11 21:03:43,063 INFO L87 Difference]: Start difference. First operand 170 states and 189 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-11 21:03:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:44,306 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2024-11-11 21:03:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-11 21:03:44,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 67 [2024-11-11 21:03:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:44,308 INFO L225 Difference]: With dead ends: 178 [2024-11-11 21:03:44,308 INFO L226 Difference]: Without dead ends: 174 [2024-11-11 21:03:44,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-11 21:03:44,309 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:44,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 93 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 202 Invalid, 3 Unknown, 0 Unchecked, 0.9s Time] [2024-11-11 21:03:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-11 21:03:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2024-11-11 21:03:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 112 states have internal predecessors, (115), 36 states have call successors, (36), 23 states have call predecessors, (36), 25 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-11-11 21:03:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 190 transitions. [2024-11-11 21:03:44,348 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 190 transitions. Word has length 67 [2024-11-11 21:03:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:44,348 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 190 transitions. [2024-11-11 21:03:44,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-11 21:03:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 190 transitions. [2024-11-11 21:03:44,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-11 21:03:44,349 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:44,349 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:44,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-11 21:03:44,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-11 21:03:44,550 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:44,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:44,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1730132651, now seen corresponding path program 1 times [2024-11-11 21:03:44,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:44,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385611059] [2024-11-11 21:03:44,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:44,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:03:44,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95609963] [2024-11-11 21:03:44,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:44,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:44,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:44,598 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:03:44,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-11 21:03:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:44,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-11 21:03:44,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:03:44,746 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 [2024-11-11 21:03:44,764 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 [2024-11-11 21:03:44,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-11 21:03:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-11 21:03:46,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:03:46,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:46,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385611059] [2024-11-11 21:03:46,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:03:46,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95609963] [2024-11-11 21:03:46,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95609963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:46,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 21:03:46,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-11 21:03:46,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509132912] [2024-11-11 21:03:46,730 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 21:03:46,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 21:03:46,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:03:46,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 21:03:46,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-11 21:03:46,731 INFO L87 Difference]: Start difference. First operand 172 states and 190 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-11 21:03:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:03:47,850 INFO L93 Difference]: Finished difference Result 174 states and 191 transitions. [2024-11-11 21:03:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 21:03:47,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 73 [2024-11-11 21:03:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:03:47,851 INFO L225 Difference]: With dead ends: 174 [2024-11-11 21:03:47,852 INFO L226 Difference]: Without dead ends: 136 [2024-11-11 21:03:47,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-11 21:03:47,852 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-11 21:03:47,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 89 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2024-11-11 21:03:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-11 21:03:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-11 21:03:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 88 states have internal predecessors, (90), 30 states have call successors, (30), 17 states have call predecessors, (30), 19 states have return successors, (33), 30 states have call predecessors, (33), 28 states have call successors, (33) [2024-11-11 21:03:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2024-11-11 21:03:47,880 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 73 [2024-11-11 21:03:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:03:47,880 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2024-11-11 21:03:47,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-11 21:03:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2024-11-11 21:03:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-11 21:03:47,881 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:03:47,881 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:03:47,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-11 21:03:48,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-11 21:03:48,086 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:03:48,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:03:48,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2025240570, now seen corresponding path program 1 times [2024-11-11 21:03:48,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:03:48,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226886865] [2024-11-11 21:03:48,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:03:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:48,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:03:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,249 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:03:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 21:03:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,297 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 21:03:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-11 21:03:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,325 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-11 21:03:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,339 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-11 21:03:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,560 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:03:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,564 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 21:03:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 21:03:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-11 21:03:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,577 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-11 21:03:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-11 21:03:50,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:03:50,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226886865] [2024-11-11 21:03:50,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226886865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:03:50,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955647733] [2024-11-11 21:03:50,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:03:50,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:03:50,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:03:50,585 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 21:03:50,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-11 21:03:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:03:50,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-11 21:03:50,741 INFO L279 TraceCheckSpWp]: Computing forward predicates...