./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --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 affe6b2992f7714f4bd95d6011e70945dc7608cfcd3847461bdcd80eeea00f05 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:48:33,990 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:48:34,070 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:48:34,078 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:48:34,079 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:48:34,111 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:48:34,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:48:34,113 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:48:34,114 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:48:34,117 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:48:34,118 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:48:34,118 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:48:34,119 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:48:34,119 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:48:34,120 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:48:34,120 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:48:34,120 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:48:34,121 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:48:34,121 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:48:34,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:48:34,122 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:48:34,126 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:48:34,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:48:34,127 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:48:34,127 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:48:34,127 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:48:34,127 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:48:34,128 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:48:34,128 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:48:34,128 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:48:34,128 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:48:34,129 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:48:34,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:48:34,130 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:48:34,131 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:48:34,131 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:48:34,131 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:48:34,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:48:34,132 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:48:34,133 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:48:34,134 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:48:34,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:48:34,134 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> affe6b2992f7714f4bd95d6011e70945dc7608cfcd3847461bdcd80eeea00f05 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:48:34,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:48:34,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:48:34,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:48:34,520 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:48:34,521 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:48:34,522 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i [2024-09-15 19:48:36,123 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:48:36,325 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:48:36,325 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i [2024-09-15 19:48:36,332 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4d4c68e3d/f7851efc7a55435d969f19e518574468/FLAGa08083dd5 [2024-09-15 19:48:36,345 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4d4c68e3d/f7851efc7a55435d969f19e518574468 [2024-09-15 19:48:36,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:48:36,348 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:48:36,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:48:36,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:48:36,356 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:48:36,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7445fdfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36, skipping insertion in model container [2024-09-15 19:48:36,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,378 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:48:36,539 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i[1692,1705] [2024-09-15 19:48:36,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:48:36,583 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:48:36,597 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-crafted/recursified_simple_array_index_value_1-1.i[1692,1705] [2024-09-15 19:48:36,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:48:36,631 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:48:36,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36 WrapperNode [2024-09-15 19:48:36,632 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:48:36,633 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:48:36,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:48:36,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:48:36,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,647 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,655 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:48:36,656 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:48:36,657 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:48:36,657 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:48:36,657 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:48:36,679 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,679 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,685 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,709 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 13, 3]. 72 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 5 writes are split as follows [0, 4, 1]. [2024-09-15 19:48:36,710 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,710 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,720 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,725 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,729 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,731 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:48:36,734 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:48:36,734 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:48:36,734 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:48:36,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (1/1) ... [2024-09-15 19:48:36,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:48:36,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:48:36,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-15 19:48:36,777 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-15 19:48:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:48:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_33_0 [2024-09-15 19:48:36,825 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_33_0 [2024-09-15 19:48:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:48:36,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 19:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-15 19:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 19:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 19:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 19:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-15 19:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:48:36,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:48:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:48:36,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:48:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 19:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 19:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-15 19:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:48:36,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 19:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_36_to_40_0 [2024-09-15 19:48:36,831 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_36_to_40_0 [2024-09-15 19:48:36,936 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:48:36,938 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:48:37,174 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:48:37,178 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:48:37,208 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:48:37,210 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-15 19:48:37,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:48:37 BoogieIcfgContainer [2024-09-15 19:48:37,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:48:37,214 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:48:37,215 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:48:37,218 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:48:37,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:48:36" (1/3) ... [2024-09-15 19:48:37,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f8b8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:48:37, skipping insertion in model container [2024-09-15 19:48:37,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:48:36" (2/3) ... [2024-09-15 19:48:37,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f8b8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:48:37, skipping insertion in model container [2024-09-15 19:48:37,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:48:37" (3/3) ... [2024-09-15 19:48:37,222 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_simple_array_index_value_1-1.i [2024-09-15 19:48:37,241 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:48:37,241 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:48:37,312 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:48:37,319 INFO L336 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=All, 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;@209cdb53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:48:37,320 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:48:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.263157894736842) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-15 19:48:37,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-15 19:48:37,332 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:48:37,333 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:48:37,334 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:48:37,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:48:37,342 INFO L85 PathProgramCache]: Analyzing trace with hash -919097502, now seen corresponding path program 1 times [2024-09-15 19:48:37,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:48:37,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794442168] [2024-09-15 19:48:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:48:37,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:48:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:37,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:48:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:37,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:48:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:48:38,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:48:38,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794442168] [2024-09-15 19:48:38,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794442168] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:48:38,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:48:38,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 19:48:38,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490521711] [2024-09-15 19:48:38,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:48:38,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 19:48:38,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:48:38,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 19:48:38,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:48:38,080 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.263157894736842) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 19:48:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:48:38,315 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-09-15 19:48:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:48:38,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-15 19:48:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:48:38,328 INFO L225 Difference]: With dead ends: 62 [2024-09-15 19:48:38,328 INFO L226 Difference]: Without dead ends: 30 [2024-09-15 19:48:38,333 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:48:38,338 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:48:38,340 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:48:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-15 19:48:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-15 19:48:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:48:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-09-15 19:48:38,404 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2024-09-15 19:48:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:48:38,406 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-09-15 19:48:38,407 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 19:48:38,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:48:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-09-15 19:48:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 19:48:38,410 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:48:38,410 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:48:38,411 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:48:38,411 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:48:38,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:48:38,415 INFO L85 PathProgramCache]: Analyzing trace with hash 614925112, now seen corresponding path program 1 times [2024-09-15 19:48:38,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:48:38,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548344399] [2024-09-15 19:48:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:48:38,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:48:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:38,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:48:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:38,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:48:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:39,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:48:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 19:48:39,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:48:39,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548344399] [2024-09-15 19:48:39,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548344399] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:48:39,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076527360] [2024-09-15 19:48:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:48:39,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:48:39,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:48:39,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:48:39,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:48:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:39,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-15 19:48:39,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:48:39,350 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 [2024-09-15 19:48:39,466 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 83 treesize of output 70 [2024-09-15 19:48:39,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 23 [2024-09-15 19:48:39,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 24 [2024-09-15 19:48:39,694 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 [2024-09-15 19:48:39,724 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 [2024-09-15 19:48:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:48:39,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:48:40,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:48:40,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 88 [2024-09-15 19:48:40,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 46 [2024-09-15 19:48:40,704 INFO L349 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2024-09-15 19:48:40,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2024-09-15 19:48:41,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:48:41,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 100 [2024-09-15 19:48:41,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-09-15 19:48:41,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 48 [2024-09-15 19:48:41,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2024-09-15 19:48:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:48:41,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076527360] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:48:41,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:48:41,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 32 [2024-09-15 19:48:41,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915389261] [2024-09-15 19:48:41,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:48:41,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-15 19:48:41,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:48:41,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-15 19:48:41,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2024-09-15 19:48:41,275 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 32 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 11 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-15 19:48:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:48:42,272 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-09-15 19:48:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 19:48:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 11 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 24 [2024-09-15 19:48:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:48:42,274 INFO L225 Difference]: With dead ends: 56 [2024-09-15 19:48:42,275 INFO L226 Difference]: Without dead ends: 37 [2024-09-15 19:48:42,276 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2024-09-15 19:48:42,277 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 19:48:42,277 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 87 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 19:48:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-15 19:48:42,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-09-15 19:48:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-15 19:48:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-09-15 19:48:42,294 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2024-09-15 19:48:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:48:42,295 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-09-15 19:48:42,295 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 11 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-15 19:48:42,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:48:42,296 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-09-15 19:48:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 19:48:42,297 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:48:42,298 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:48:42,314 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:48:42,499 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:48:42,499 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:48:42,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:48:42,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1894741686, now seen corresponding path program 2 times [2024-09-15 19:48:42,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:48:42,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435599348] [2024-09-15 19:48:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:48:42,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:48:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:42,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:48:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:42,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:48:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:43,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:48:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:43,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:48:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:48:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 19:48:43,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:48:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435599348] [2024-09-15 19:48:43,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435599348] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:48:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878637575] [2024-09-15 19:48:43,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:48:43,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:48:43,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:48:43,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:48:43,442 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:48:43,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:48:43,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:48:43,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-15 19:48:43,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:48:43,570 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 [2024-09-15 19:48:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-15 19:48:43,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:48:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:48:48,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878637575] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:48:48,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:48:48,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14] total 31 [2024-09-15 19:48:48,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122133988] [2024-09-15 19:48:48,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:48:48,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-15 19:48:48,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:48:48,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-15 19:48:48,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=799, Unknown=1, NotChecked=0, Total=930 [2024-09-15 19:48:48,674 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 31 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 9 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-15 19:49:00,790 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:49:05,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:49:09,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:49:21,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:49:25,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:49:29,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:49:33,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:49:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:49:33,654 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2024-09-15 19:49:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 19:49:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 9 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 29 [2024-09-15 19:49:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:49:33,656 INFO L225 Difference]: With dead ends: 73 [2024-09-15 19:49:33,656 INFO L226 Difference]: Without dead ends: 52 [2024-09-15 19:49:33,657 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=326, Invalid=1832, Unknown=4, NotChecked=0, Total=2162 [2024-09-15 19:49:33,658 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 46 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2024-09-15 19:49:33,659 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 469 Invalid, 6 Unknown, 0 Unchecked, 24.4s Time] [2024-09-15 19:49:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-15 19:49:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2024-09-15 19:49:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-15 19:49:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-09-15 19:49:33,679 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 29 [2024-09-15 19:49:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:49:33,679 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-09-15 19:49:33,679 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 9 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-15 19:49:33,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:49:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-09-15 19:49:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 19:49:33,681 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:49:33,681 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:49:33,699 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:49:33,881 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:49:33,882 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:49:33,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:49:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash -735784678, now seen corresponding path program 3 times [2024-09-15 19:49:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:49:33,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955262841] [2024-09-15 19:49:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:49:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:49:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:49:35,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:49:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:49:35,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:49:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:49:35,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:49:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:49:36,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:49:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:49:37,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:49:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:49:37,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:49:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:49:37,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:49:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:49:37,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:49:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:49:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 19:49:38,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:49:38,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955262841] [2024-09-15 19:49:38,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955262841] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:49:38,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469473839] [2024-09-15 19:49:38,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:49:38,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:49:38,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:49:38,004 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:49:38,007 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:49:38,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-15 19:49:38,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:49:38,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-15 19:49:38,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:49:38,752 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 [2024-09-15 19:49:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-15 19:49:39,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:50:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:50:43,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469473839] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:50:43,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:50:43,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 30] total 64 [2024-09-15 19:50:43,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791797932] [2024-09-15 19:50:43,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:50:43,308 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-15 19:50:43,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:50:43,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-15 19:50:43,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=3643, Unknown=15, NotChecked=0, Total=4032 [2024-09-15 19:50:43,311 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 64 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 55 states have internal predecessors, (64), 18 states have call successors, (20), 11 states have call predecessors, (20), 22 states have return successors, (22), 20 states have call predecessors, (22), 17 states have call successors, (22) [2024-09-15 19:52:15,785 WARN L293 SmtUtils]: Spent 1.20m on a formula simplification that was a NOOP. DAG size: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-15 19:52:20,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:52:24,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:52:28,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:52:32,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:52:37,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:52:41,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:52:45,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:52:49,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:52:53,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-09-15 19:52:57,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []