./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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_nla-digbench/recursified_egcd3-ll.c -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 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:13:18,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:13:18,859 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:13:18,864 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:13:18,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:13:18,891 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:13:18,892 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:13:18,892 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:13:18,893 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:13:18,895 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:13:18,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:13:18,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:13:18,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:13:18,899 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:13:18,899 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:13:18,900 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:13:18,900 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:13:18,900 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:13:18,900 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:13:18,901 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:13:18,901 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:13:18,901 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:13:18,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:13:18,902 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:13:18,902 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:13:18,902 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:13:18,902 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:13:18,902 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:13:18,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:13:18,903 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:13:18,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:13:18,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:13:18,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:13:18,904 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:13:18,905 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:13:18,905 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:13:18,905 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:13:18,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:13:18,906 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:13:18,906 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:13:18,906 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:13:18,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:13:18,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:13:19,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:13:19,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:13:19,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:13:19,200 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:13:19,200 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:13:19,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-09-20 13:13:20,625 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:13:20,819 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:13:20,821 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-09-20 13:13:20,839 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/106d32149/4f72d42f53a34241a89f0c1d8275d8d8/FLAG0ef2d0479 [2024-09-20 13:13:20,886 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/106d32149/4f72d42f53a34241a89f0c1d8275d8d8 [2024-09-20 13:13:20,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:13:20,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:13:20,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:13:20,896 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:13:20,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:13:20,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:13:20" (1/1) ... [2024-09-20 13:13:20,910 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66afff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:20, skipping insertion in model container [2024-09-20 13:13:20,910 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:13:20" (1/1) ... [2024-09-20 13:13:20,939 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:13:21,089 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_nla-digbench/recursified_egcd3-ll.c[1052,1065] [2024-09-20 13:13:21,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:13:21,151 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:13:21,163 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_nla-digbench/recursified_egcd3-ll.c[1052,1065] [2024-09-20 13:13:21,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:13:21,207 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:13:21,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21 WrapperNode [2024-09-20 13:13:21,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:13:21,209 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:13:21,211 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:13:21,211 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:13:21,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,226 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,234 INFO L138 Inliner]: procedures = 18, calls = 127, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:13:21,234 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:13:21,235 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:13:21,235 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:13:21,235 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:13:21,245 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,251 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,271 INFO L175 MemorySlicer]: Split 77 memory accesses to 13 slices as follows [5, 6, 2, 6, 5, 6, 7, 7, 6, 9, 6, 5, 7]. 12 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. The 22 writes are split as follows [2, 2, 0, 2, 2, 2, 1, 1, 2, 2, 2, 2, 2]. [2024-09-20 13:13:21,272 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,272 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,290 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,299 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,301 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,305 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:13:21,309 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:13:21,309 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:13:21,309 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:13:21,310 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (1/1) ... [2024-09-20 13:13:21,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:13:21,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:21,338 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) [2024-09-20 13:13:21,340 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 [2024-09-20 13:13:21,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:13:21,389 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 13:13:21,389 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 13:13:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:13:21,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:13:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:13:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 13:13:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 13:13:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 13:13:21,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 13:13:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 13:13:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 13:13:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-20 13:13:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-09-20 13:13:21,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-09-20 13:13:21,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-09-20 13:13:21,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-09-20 13:13:21,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-09-20 13:13:21,393 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_47_to_56_0 [2024-09-20 13:13:21,393 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_47_to_56_0 [2024-09-20 13:13:21,393 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_70_0 [2024-09-20 13:13:21,393 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_70_0 [2024-09-20 13:13:21,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_59_0 [2024-09-20 13:13:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_59_0 [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-09-20 13:13:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-09-20 13:13:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-09-20 13:13:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-09-20 13:13:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-09-20 13:13:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:13:21,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:13:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:13:21,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:13:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 13:13:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 13:13:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 13:13:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 13:13:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 13:13:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 13:13:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 13:13:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-20 13:13:21,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-09-20 13:13:21,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-09-20 13:13:21,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-09-20 13:13:21,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-09-20 13:13:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-09-20 13:13:21,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 13:13:21,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 13:13:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 13:13:21,583 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:13:21,586 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:13:21,942 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-20 13:13:21,942 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:13:21,961 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:13:21,962 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-20 13:13:21,962 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:13:21 BoogieIcfgContainer [2024-09-20 13:13:21,962 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:13:21,965 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:13:21,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:13:21,968 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:13:21,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:13:20" (1/3) ... [2024-09-20 13:13:21,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65183747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:13:21, skipping insertion in model container [2024-09-20 13:13:21,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:13:21" (2/3) ... [2024-09-20 13:13:21,971 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65183747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:13:21, skipping insertion in model container [2024-09-20 13:13:21,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:13:21" (3/3) ... [2024-09-20 13:13:21,973 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd3-ll.c [2024-09-20 13:13:21,989 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:13:21,990 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:13:22,055 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:13:22,061 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;@18a03252, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:13:22,065 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:13:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-20 13:13:22,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 13:13:22,078 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:22,078 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:22,079 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:22,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:22,085 INFO L85 PathProgramCache]: Analyzing trace with hash -107886040, now seen corresponding path program 1 times [2024-09-20 13:13:22,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:22,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059275543] [2024-09-20 13:13:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:22,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:22,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:13:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:22,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:13:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:22,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:13:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:22,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:13:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:13:22,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059275543] [2024-09-20 13:13:22,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059275543] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:13:22,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:13:22,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 13:13:22,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680556516] [2024-09-20 13:13:22,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:13:22,447 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 13:13:22,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:22,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 13:13:22,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 13:13:22,474 INFO L87 Difference]: Start difference. First operand has 56 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 13:13:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:22,741 INFO L93 Difference]: Finished difference Result 112 states and 157 transitions. [2024-09-20 13:13:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 13:13:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-20 13:13:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:22,752 INFO L225 Difference]: With dead ends: 112 [2024-09-20 13:13:22,752 INFO L226 Difference]: Without dead ends: 58 [2024-09-20 13:13:22,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 13:13:22,758 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:22,758 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 35 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:13:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-20 13:13:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-09-20 13:13:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 34 states have internal predecessors, (34), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 13:13:22,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-09-20 13:13:22,810 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 27 [2024-09-20 13:13:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:22,810 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-09-20 13:13:22,810 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 13:13:22,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-09-20 13:13:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 13:13:22,813 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:22,813 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:22,813 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:13:22,814 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:22,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:22,814 INFO L85 PathProgramCache]: Analyzing trace with hash -832294486, now seen corresponding path program 1 times [2024-09-20 13:13:22,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:22,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740765609] [2024-09-20 13:13:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:22,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:23,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:13:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:23,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:13:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:23,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:13:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:23,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:13:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:13:23,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:23,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740765609] [2024-09-20 13:13:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740765609] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:13:23,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:13:23,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-20 13:13:23,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130354728] [2024-09-20 13:13:23,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:13:23,556 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 13:13:23,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:23,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 13:13:23,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:13:23,560 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 13:13:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:24,296 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2024-09-20 13:13:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 13:13:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-09-20 13:13:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:24,299 INFO L225 Difference]: With dead ends: 66 [2024-09-20 13:13:24,299 INFO L226 Difference]: Without dead ends: 58 [2024-09-20 13:13:24,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-09-20 13:13:24,301 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:24,301 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 99 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 13:13:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-20 13:13:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2024-09-20 13:13:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 35 states have internal predecessors, (35), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-20 13:13:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-09-20 13:13:24,324 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 28 [2024-09-20 13:13:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:24,325 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-09-20 13:13:24,325 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 13:13:24,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-09-20 13:13:24,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 13:13:24,326 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:24,326 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:24,327 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 13:13:24,327 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:24,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:24,327 INFO L85 PathProgramCache]: Analyzing trace with hash 701795806, now seen corresponding path program 1 times [2024-09-20 13:13:24,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:24,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596704642] [2024-09-20 13:13:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:24,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:24,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659729399] [2024-09-20 13:13:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:24,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:24,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:24,394 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) [2024-09-20 13:13:24,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:13:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:24,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 189 conjuncts are in the unsatisfiable core [2024-09-20 13:13:24,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:24,688 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 [2024-09-20 13:13:24,691 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 [2024-09-20 13:13:24,708 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 [2024-09-20 13:13:24,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:24,721 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 [2024-09-20 13:13:24,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:24,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:25,030 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 11 treesize of output 7 [2024-09-20 13:13:25,039 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 11 treesize of output 7 [2024-09-20 13:13:25,156 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 [2024-09-20 13:13:25,160 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 [2024-09-20 13:13:25,168 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 [2024-09-20 13:13:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:13:25,232 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:13:25,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:25,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596704642] [2024-09-20 13:13:25,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:25,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659729399] [2024-09-20 13:13:25,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659729399] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:13:25,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:13:25,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-20 13:13:25,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468871619] [2024-09-20 13:13:25,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:13:25,234 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 13:13:25,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:25,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 13:13:25,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:13:25,237 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 13:13:25,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:25,919 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2024-09-20 13:13:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 13:13:25,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2024-09-20 13:13:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:25,921 INFO L225 Difference]: With dead ends: 92 [2024-09-20 13:13:25,921 INFO L226 Difference]: Without dead ends: 88 [2024-09-20 13:13:25,922 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:13:25,922 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 38 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:25,923 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 405 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 13:13:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-20 13:13:25,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2024-09-20 13:13:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.12) internal successors, (56), 56 states have internal predecessors, (56), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2024-09-20 13:13:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-09-20 13:13:25,946 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 32 [2024-09-20 13:13:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:25,946 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-09-20 13:13:25,947 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 5 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 13:13:25,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-09-20 13:13:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 13:13:25,948 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:25,948 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:25,970 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 13:13:26,155 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:26,156 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:26,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash -630586112, now seen corresponding path program 1 times [2024-09-20 13:13:26,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:26,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223778623] [2024-09-20 13:13:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:26,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:26,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143722882] [2024-09-20 13:13:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:26,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:26,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:26,218 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) [2024-09-20 13:13:26,219 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:13:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:26,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-20 13:13:26,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:26,422 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 [2024-09-20 13:13:26,431 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 [2024-09-20 13:13:26,435 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 [2024-09-20 13:13:26,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:26,798 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 [2024-09-20 13:13:26,802 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 [2024-09-20 13:13:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:13:26,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:26,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:26,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223778623] [2024-09-20 13:13:26,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:26,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143722882] [2024-09-20 13:13:26,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143722882] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:26,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:13:26,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-20 13:13:26,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038953304] [2024-09-20 13:13:26,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:26,990 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 13:13:26,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:26,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 13:13:26,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:13:26,991 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 13:13:27,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:27,481 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2024-09-20 13:13:27,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 13:13:27,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-09-20 13:13:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:27,483 INFO L225 Difference]: With dead ends: 119 [2024-09-20 13:13:27,484 INFO L226 Difference]: Without dead ends: 117 [2024-09-20 13:13:27,484 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-20 13:13:27,485 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 45 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:27,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 293 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:13:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-20 13:13:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2024-09-20 13:13:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 77 states have internal predecessors, (78), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2024-09-20 13:13:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2024-09-20 13:13:27,526 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 38 [2024-09-20 13:13:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:27,526 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2024-09-20 13:13:27,526 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 13:13:27,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2024-09-20 13:13:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 13:13:27,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:27,528 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:27,546 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 13:13:27,728 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:27,729 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:27,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1663143179, now seen corresponding path program 1 times [2024-09-20 13:13:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:27,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474894304] [2024-09-20 13:13:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:27,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:28,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:13:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:28,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:13:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:28,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:13:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:28,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:13:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:28,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:13:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:28,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:13:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 13:13:28,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:28,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474894304] [2024-09-20 13:13:28,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474894304] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:28,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999172916] [2024-09-20 13:13:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:28,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:28,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:28,930 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) [2024-09-20 13:13:28,932 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:13:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:29,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 13:13:29,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:29,217 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 [2024-09-20 13:13:29,222 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 [2024-09-20 13:13:29,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:29,305 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 27 treesize of output 19 [2024-09-20 13:13:29,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:29,416 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 [2024-09-20 13:13:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:13:29,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:13:30,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999172916] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:13:30,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:13:30,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 40 [2024-09-20 13:13:30,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995971290] [2024-09-20 13:13:30,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:30,197 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-20 13:13:30,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:30,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-20 13:13:30,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 13:13:30,199 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 40 states, 32 states have (on average 1.8125) internal successors, (58), 34 states have internal predecessors, (58), 15 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (15), 9 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-20 13:13:34,271 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 [0] [2024-09-20 13:13:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:35,732 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2024-09-20 13:13:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 13:13:35,733 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 32 states have (on average 1.8125) internal successors, (58), 34 states have internal predecessors, (58), 15 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (15), 9 states have call predecessors, (15), 14 states have call successors, (15) Word has length 41 [2024-09-20 13:13:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:35,735 INFO L225 Difference]: With dead ends: 142 [2024-09-20 13:13:35,735 INFO L226 Difference]: Without dead ends: 134 [2024-09-20 13:13:35,739 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=401, Invalid=2905, Unknown=0, NotChecked=0, Total=3306 [2024-09-20 13:13:35,740 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 146 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 122 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:35,740 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 72 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1052 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-09-20 13:13:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-20 13:13:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2024-09-20 13:13:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 76 states have (on average 1.118421052631579) internal successors, (85), 84 states have internal predecessors, (85), 31 states have call successors, (31), 16 states have call predecessors, (31), 18 states have return successors, (36), 29 states have call predecessors, (36), 29 states have call successors, (36) [2024-09-20 13:13:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2024-09-20 13:13:35,814 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 41 [2024-09-20 13:13:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:35,815 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2024-09-20 13:13:35,815 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 32 states have (on average 1.8125) internal successors, (58), 34 states have internal predecessors, (58), 15 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (15), 9 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-20 13:13:35,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2024-09-20 13:13:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 13:13:35,819 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:35,819 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:13:35,838 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 13:13:36,019 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:36,020 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:36,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash 467800380, now seen corresponding path program 1 times [2024-09-20 13:13:36,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:36,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178679437] [2024-09-20 13:13:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:36,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:36,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924331248] [2024-09-20 13:13:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:36,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:36,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:36,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:13:36,085 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:13:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:36,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 262 conjuncts are in the unsatisfiable core [2024-09-20 13:13:36,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:36,387 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 [2024-09-20 13:13:36,390 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 [2024-09-20 13:13:36,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:36,465 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 15 treesize of output 11 [2024-09-20 13:13:36,472 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 [2024-09-20 13:13:36,478 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 [2024-09-20 13:13:36,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:36,653 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 11 treesize of output 7 [2024-09-20 13:13:36,966 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 25 treesize of output 17 [2024-09-20 13:13:37,038 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 [2024-09-20 13:13:37,048 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 [2024-09-20 13:13:37,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:37,069 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 51 treesize of output 47 [2024-09-20 13:13:37,126 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-20 13:13:37,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 62 [2024-09-20 13:13:38,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:38,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 97 [2024-09-20 13:13:38,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:38,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 114 [2024-09-20 13:13:38,391 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 24 treesize of output 12 [2024-09-20 13:13:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:13:38,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:13:40,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:40,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178679437] [2024-09-20 13:13:40,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:40,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924331248] [2024-09-20 13:13:40,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924331248] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:13:40,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:13:40,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 41 [2024-09-20 13:13:40,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8328065] [2024-09-20 13:13:40,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:40,435 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-20 13:13:40,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:40,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-20 13:13:40,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 13:13:40,437 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 41 states, 34 states have (on average 1.5) internal successors, (51), 28 states have internal predecessors, (51), 13 states have call successors, (18), 13 states have call predecessors, (18), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-20 13:13:44,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-20 13:13:48,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-20 13:14:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:12,736 INFO L93 Difference]: Finished difference Result 219 states and 268 transitions. [2024-09-20 13:14:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-09-20 13:14:12,736 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 1.5) internal successors, (51), 28 states have internal predecessors, (51), 13 states have call successors, (18), 13 states have call predecessors, (18), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2024-09-20 13:14:12,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:12,740 INFO L225 Difference]: With dead ends: 219 [2024-09-20 13:14:12,740 INFO L226 Difference]: Without dead ends: 213 [2024-09-20 13:14:12,741 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=583, Invalid=6557, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 13:14:12,742 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 258 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 146 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:12,742 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 256 Invalid, 2734 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [146 Valid, 2586 Invalid, 2 Unknown, 0 Unchecked, 21.2s Time] [2024-09-20 13:14:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-09-20 13:14:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 206. [2024-09-20 13:14:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 125 states have (on average 1.12) internal successors, (140), 138 states have internal predecessors, (140), 50 states have call successors, (50), 25 states have call predecessors, (50), 30 states have return successors, (65), 48 states have call predecessors, (65), 48 states have call successors, (65) [2024-09-20 13:14:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 255 transitions. [2024-09-20 13:14:12,862 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 255 transitions. Word has length 43 [2024-09-20 13:14:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:12,862 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 255 transitions. [2024-09-20 13:14:12,863 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 1.5) internal successors, (51), 28 states have internal predecessors, (51), 13 states have call successors, (18), 13 states have call predecessors, (18), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-20 13:14:12,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 255 transitions. [2024-09-20 13:14:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 13:14:12,864 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:12,864 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:14:12,884 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:14:13,068 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:13,069 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:13,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash 384099232, now seen corresponding path program 1 times [2024-09-20 13:14:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:13,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301156969] [2024-09-20 13:14:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:13,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:14:13,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729799075] [2024-09-20 13:14:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:13,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:13,109 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:14:13,113 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:14:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:13,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-20 13:14:13,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:13,317 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 [2024-09-20 13:14:13,323 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 [2024-09-20 13:14:13,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:13,345 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 [2024-09-20 13:14:13,993 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 [2024-09-20 13:14:14,002 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 [2024-09-20 13:14:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 13:14:14,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 13:14:14,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:14,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301156969] [2024-09-20 13:14:14,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:14:14,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729799075] [2024-09-20 13:14:14,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729799075] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:14,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:14:14,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2024-09-20 13:14:14,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108101696] [2024-09-20 13:14:14,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:14:14,720 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 13:14:14,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 13:14:14,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:14:14,721 INFO L87 Difference]: Start difference. First operand 206 states and 255 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 13:14:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:15,689 INFO L93 Difference]: Finished difference Result 279 states and 345 transitions. [2024-09-20 13:14:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 13:14:15,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-09-20 13:14:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:15,692 INFO L225 Difference]: With dead ends: 279 [2024-09-20 13:14:15,692 INFO L226 Difference]: Without dead ends: 277 [2024-09-20 13:14:15,693 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:14:15,693 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 25 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:15,694 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 382 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 13:14:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-09-20 13:14:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2024-09-20 13:14:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 167 states have (on average 1.125748502994012) internal successors, (188), 186 states have internal predecessors, (188), 68 states have call successors, (68), 33 states have call predecessors, (68), 38 states have return successors, (83), 63 states have call predecessors, (83), 66 states have call successors, (83) [2024-09-20 13:14:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 339 transitions. [2024-09-20 13:14:15,838 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 339 transitions. Word has length 44 [2024-09-20 13:14:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:15,838 INFO L474 AbstractCegarLoop]: Abstraction has 274 states and 339 transitions. [2024-09-20 13:14:15,839 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 13:14:15,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 339 transitions. [2024-09-20 13:14:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 13:14:15,841 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:15,842 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:14:15,861 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 13:14:16,042 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 13:14:16,042 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:16,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:16,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1953297954, now seen corresponding path program 1 times [2024-09-20 13:14:16,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:16,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175283050] [2024-09-20 13:14:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:16,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:14:16,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531879290] [2024-09-20 13:14:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:16,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:16,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:14:16,089 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:14:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:16,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-09-20 13:14:16,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:16,343 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 [2024-09-20 13:14:16,352 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 [2024-09-20 13:14:16,363 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 [2024-09-20 13:14:16,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:16,512 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 [2024-09-20 13:14:16,529 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 27 treesize of output 19 [2024-09-20 13:14:16,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:16,604 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 11 treesize of output 7 [2024-09-20 13:14:16,789 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 27 treesize of output 19 [2024-09-20 13:14:16,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:16,812 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 [2024-09-20 13:14:16,828 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 [2024-09-20 13:14:17,792 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 [2024-09-20 13:14:17,806 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 [2024-09-20 13:14:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:14:18,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:18,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:18,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175283050] [2024-09-20 13:14:18,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:14:18,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531879290] [2024-09-20 13:14:18,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531879290] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:18,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:14:18,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-20 13:14:18,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832068251] [2024-09-20 13:14:18,463 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:18,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 13:14:18,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:18,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 13:14:18,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2024-09-20 13:14:18,464 INFO L87 Difference]: Start difference. First operand 274 states and 339 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 13:14:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:22,264 INFO L93 Difference]: Finished difference Result 429 states and 531 transitions. [2024-09-20 13:14:22,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 13:14:22,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2024-09-20 13:14:22,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:22,268 INFO L225 Difference]: With dead ends: 429 [2024-09-20 13:14:22,269 INFO L226 Difference]: Without dead ends: 427 [2024-09-20 13:14:22,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-09-20 13:14:22,270 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 77 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:22,270 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 528 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-20 13:14:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2024-09-20 13:14:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 420. [2024-09-20 13:14:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 258 states have (on average 1.1317829457364341) internal successors, (292), 288 states have internal predecessors, (292), 100 states have call successors, (100), 51 states have call predecessors, (100), 61 states have return successors, (132), 93 states have call predecessors, (132), 97 states have call successors, (132) [2024-09-20 13:14:22,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 524 transitions. [2024-09-20 13:14:22,438 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 524 transitions. Word has length 49 [2024-09-20 13:14:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:22,438 INFO L474 AbstractCegarLoop]: Abstraction has 420 states and 524 transitions. [2024-09-20 13:14:22,438 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 13:14:22,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 524 transitions. [2024-09-20 13:14:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 13:14:22,439 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:22,440 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:14:22,454 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 13:14:22,640 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:22,640 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:22,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:22,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1252856638, now seen corresponding path program 1 times [2024-09-20 13:14:22,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:22,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655764040] [2024-09-20 13:14:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:22,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:14:22,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752487258] [2024-09-20 13:14:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:22,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:22,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:22,679 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:14:22,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:14:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:22,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-20 13:14:22,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:22,893 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 [2024-09-20 13:14:22,900 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 [2024-09-20 13:14:22,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:22,929 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 [2024-09-20 13:14:23,385 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 [2024-09-20 13:14:23,392 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 [2024-09-20 13:14:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 13:14:23,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 13:14:23,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:23,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655764040] [2024-09-20 13:14:23,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:14:23,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752487258] [2024-09-20 13:14:23,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752487258] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:23,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:14:23,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-20 13:14:23,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353906440] [2024-09-20 13:14:23,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:14:23,919 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 13:14:23,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:23,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 13:14:23,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:14:23,920 INFO L87 Difference]: Start difference. First operand 420 states and 524 transitions. Second operand has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 13:14:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:24,653 INFO L93 Difference]: Finished difference Result 492 states and 619 transitions. [2024-09-20 13:14:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 13:14:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2024-09-20 13:14:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:24,660 INFO L225 Difference]: With dead ends: 492 [2024-09-20 13:14:24,661 INFO L226 Difference]: Without dead ends: 490 [2024-09-20 13:14:24,662 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:14:24,663 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 16 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:24,664 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 307 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 13:14:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2024-09-20 13:14:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 436. [2024-09-20 13:14:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 270 states have (on average 1.1222222222222222) internal successors, (303), 300 states have internal predecessors, (303), 100 states have call successors, (100), 55 states have call predecessors, (100), 65 states have return successors, (132), 93 states have call predecessors, (132), 97 states have call successors, (132) [2024-09-20 13:14:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 535 transitions. [2024-09-20 13:14:24,926 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 535 transitions. Word has length 50 [2024-09-20 13:14:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:24,926 INFO L474 AbstractCegarLoop]: Abstraction has 436 states and 535 transitions. [2024-09-20 13:14:24,926 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 13:14:24,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 535 transitions. [2024-09-20 13:14:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 13:14:24,928 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:24,928 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:14:24,946 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 13:14:25,128 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:25,129 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:25,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1729091792, now seen corresponding path program 2 times [2024-09-20 13:14:25,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:25,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490319711] [2024-09-20 13:14:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:25,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:25,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:14:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:25,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:14:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:25,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:14:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:25,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:14:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:26,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:14:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:26,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:14:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:26,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:14:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:26,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:14:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 13:14:27,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:27,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490319711] [2024-09-20 13:14:27,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490319711] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:27,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003616044] [2024-09-20 13:14:27,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:14:27,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:27,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:27,219 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:14:27,221 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:14:27,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:14:27,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:14:27,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-20 13:14:27,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:27,495 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 [2024-09-20 13:14:27,503 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 [2024-09-20 13:14:27,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:27,939 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 11 treesize of output 7 [2024-09-20 13:14:28,428 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 40 treesize of output 28 [2024-09-20 13:14:28,436 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 44 treesize of output 21 [2024-09-20 13:14:29,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:29,283 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 25 treesize of output 17 [2024-09-20 13:14:29,486 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 25 treesize of output 17 [2024-09-20 13:14:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 13:14:29,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 13:14:32,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003616044] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:14:32,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:14:32,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2024-09-20 13:14:32,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912879845] [2024-09-20 13:14:32,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:32,985 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 13:14:32,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 13:14:32,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 13:14:32,986 INFO L87 Difference]: Start difference. First operand 436 states and 535 transitions. Second operand has 39 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 12 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (15), 8 states have call predecessors, (15), 11 states have call successors, (15) [2024-09-20 13:14:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:38,962 INFO L93 Difference]: Finished difference Result 508 states and 697 transitions. [2024-09-20 13:14:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 13:14:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 12 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (15), 8 states have call predecessors, (15), 11 states have call successors, (15) Word has length 54 [2024-09-20 13:14:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:38,967 INFO L225 Difference]: With dead ends: 508 [2024-09-20 13:14:38,967 INFO L226 Difference]: Without dead ends: 478 [2024-09-20 13:14:38,968 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=376, Invalid=2816, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 13:14:38,969 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 110 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:38,969 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 136 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-09-20 13:14:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2024-09-20 13:14:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 442. [2024-09-20 13:14:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 273 states have (on average 1.1135531135531136) internal successors, (304), 301 states have internal predecessors, (304), 102 states have call successors, (102), 55 states have call predecessors, (102), 66 states have return successors, (142), 97 states have call predecessors, (142), 98 states have call successors, (142) [2024-09-20 13:14:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 548 transitions. [2024-09-20 13:14:39,178 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 548 transitions. Word has length 54 [2024-09-20 13:14:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:39,178 INFO L474 AbstractCegarLoop]: Abstraction has 442 states and 548 transitions. [2024-09-20 13:14:39,179 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 12 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (15), 8 states have call predecessors, (15), 11 states have call successors, (15) [2024-09-20 13:14:39,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 548 transitions. [2024-09-20 13:14:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 13:14:39,180 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:39,180 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:14:39,199 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 13:14:39,380 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:39,381 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:39,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash 695004736, now seen corresponding path program 2 times [2024-09-20 13:14:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:39,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544903597] [2024-09-20 13:14:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:39,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:40,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:14:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:40,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:14:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:40,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:14:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:41,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-20 13:14:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:41,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 13:14:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:41,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 13:14:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 13:14:41,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:14:41,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544903597] [2024-09-20 13:14:41,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544903597] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:14:41,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784508647] [2024-09-20 13:14:41,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:14:41,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:41,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:41,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:14:41,825 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:14:42,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:14:42,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:14:42,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-09-20 13:14:42,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:42,319 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 [2024-09-20 13:14:42,328 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 [2024-09-20 13:14:42,335 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 [2024-09-20 13:14:42,342 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 [2024-09-20 13:14:42,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:42,597 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 11 treesize of output 7 [2024-09-20 13:14:43,059 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 40 treesize of output 28 [2024-09-20 13:14:43,066 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 40 treesize of output 28 [2024-09-20 13:14:43,076 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 40 treesize of output 17 [2024-09-20 13:14:43,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:43,587 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 11 treesize of output 7 [2024-09-20 13:14:43,942 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 27 treesize of output 19 [2024-09-20 13:14:43,949 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 44 treesize of output 32 [2024-09-20 13:14:43,956 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 40 treesize of output 17 [2024-09-20 13:14:44,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:44,225 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 25 treesize of output 17 [2024-09-20 13:14:44,352 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 21 treesize of output 13 [2024-09-20 13:14:44,358 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 17 treesize of output 9 [2024-09-20 13:14:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 13:14:44,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:14:46,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784508647] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:14:46,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:14:46,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 14] total 35 [2024-09-20 13:14:46,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901840763] [2024-09-20 13:14:46,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:14:46,060 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 13:14:46,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:14:46,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 13:14:46,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 13:14:46,061 INFO L87 Difference]: Start difference. First operand 442 states and 548 transitions. Second operand has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 27 states have internal predecessors, (77), 12 states have call successors, (26), 12 states have call predecessors, (26), 7 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-20 13:14:50,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:54,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:59,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:07,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:09,405 INFO L93 Difference]: Finished difference Result 657 states and 808 transitions. [2024-09-20 13:15:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 13:15:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 27 states have internal predecessors, (77), 12 states have call successors, (26), 12 states have call predecessors, (26), 7 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 60 [2024-09-20 13:15:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:09,409 INFO L225 Difference]: With dead ends: 657 [2024-09-20 13:15:09,409 INFO L226 Difference]: Without dead ends: 395 [2024-09-20 13:15:09,411 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 106 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=332, Invalid=2860, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 13:15:09,411 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 75 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:15:09,412 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 254 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1765 Invalid, 4 Unknown, 0 Unchecked, 21.1s Time] [2024-09-20 13:15:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-09-20 13:15:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 354. [2024-09-20 13:15:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 226 states have (on average 1.0973451327433628) internal successors, (248), 244 states have internal predecessors, (248), 74 states have call successors, (74), 52 states have call predecessors, (74), 53 states have return successors, (84), 67 states have call predecessors, (84), 72 states have call successors, (84) [2024-09-20 13:15:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 406 transitions. [2024-09-20 13:15:09,600 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 406 transitions. Word has length 60 [2024-09-20 13:15:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:09,600 INFO L474 AbstractCegarLoop]: Abstraction has 354 states and 406 transitions. [2024-09-20 13:15:09,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 27 states have internal predecessors, (77), 12 states have call successors, (26), 12 states have call predecessors, (26), 7 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-20 13:15:09,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 406 transitions. [2024-09-20 13:15:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 13:15:09,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:09,602 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:15:09,622 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 13:15:09,803 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 13:15:09,804 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:09,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash 57984886, now seen corresponding path program 1 times [2024-09-20 13:15:09,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:09,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159566010] [2024-09-20 13:15:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:09,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:11,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:15:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:11,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:15:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:11,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:15:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:11,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 13:15:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:11,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:15:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:11,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 13:15:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:11,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:15:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:11,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 13:15:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 13:15:11,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:15:11,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159566010] [2024-09-20 13:15:11,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159566010] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:15:11,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282060347] [2024-09-20 13:15:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:11,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:11,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:11,802 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:15:11,803 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 13:15:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:12,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-20 13:15:12,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:15:12,084 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 [2024-09-20 13:15:12,090 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 [2024-09-20 13:15:12,097 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 [2024-09-20 13:15:12,102 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 [2024-09-20 13:15:12,117 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 [2024-09-20 13:15:12,136 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 11 treesize of output 7 [2024-09-20 13:15:12,679 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 39 treesize of output 25 [2024-09-20 13:15:12,684 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 25 treesize of output 17 [2024-09-20 13:15:12,718 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 21 treesize of output 13 [2024-09-20 13:15:12,724 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 17 treesize of output 9 [2024-09-20 13:15:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 13:15:12,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:15:12,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282060347] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:15:12,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:15:12,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 17 [2024-09-20 13:15:12,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589927008] [2024-09-20 13:15:12,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:15:12,733 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 13:15:12,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:15:12,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 13:15:12,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-09-20 13:15:12,734 INFO L87 Difference]: Start difference. First operand 354 states and 406 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-20 13:15:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:14,274 INFO L93 Difference]: Finished difference Result 668 states and 805 transitions. [2024-09-20 13:15:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 13:15:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 67 [2024-09-20 13:15:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:14,278 INFO L225 Difference]: With dead ends: 668 [2024-09-20 13:15:14,278 INFO L226 Difference]: Without dead ends: 414 [2024-09-20 13:15:14,279 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-09-20 13:15:14,280 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:15:14,280 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 213 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 13:15:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2024-09-20 13:15:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 402. [2024-09-20 13:15:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 256 states have (on average 1.0859375) internal successors, (278), 274 states have internal predecessors, (278), 79 states have call successors, (79), 56 states have call predecessors, (79), 66 states have return successors, (107), 72 states have call predecessors, (107), 77 states have call successors, (107) [2024-09-20 13:15:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 464 transitions. [2024-09-20 13:15:14,519 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 464 transitions. Word has length 67 [2024-09-20 13:15:14,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:14,519 INFO L474 AbstractCegarLoop]: Abstraction has 402 states and 464 transitions. [2024-09-20 13:15:14,519 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-20 13:15:14,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 464 transitions. [2024-09-20 13:15:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-20 13:15:14,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:14,520 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:15:14,540 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 13:15:14,724 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 13:15:14,725 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:14,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1050777586, now seen corresponding path program 1 times [2024-09-20 13:15:14,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:14,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929967070] [2024-09-20 13:15:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:14,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:15:14,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496544991] [2024-09-20 13:15:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:14,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:14,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:14,804 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:15:14,806 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 13:15:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:15:15,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 257 conjuncts are in the unsatisfiable core [2024-09-20 13:15:15,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:15:15,123 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 [2024-09-20 13:15:15,274 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 [2024-09-20 13:15:15,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:15:15,301 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 [2024-09-20 13:15:15,316 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 [2024-09-20 13:15:15,330 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 [2024-09-20 13:15:15,345 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 15 treesize of output 11 [2024-09-20 13:15:15,468 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 11 treesize of output 7 [2024-09-20 13:15:15,483 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 11 treesize of output 7 [2024-09-20 13:15:16,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:15:16,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:15:16,432 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 11 treesize of output 7 [2024-09-20 13:15:17,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:15:17,053 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 [2024-09-20 13:15:17,220 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 11 treesize of output 7 [2024-09-20 13:15:39,832 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 50 treesize of output 38 [2024-09-20 13:15:44,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:15:44,258 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 38 treesize of output 38 [2024-09-20 13:15:49,137 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-20 13:15:49,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 73 [2024-09-20 13:15:49,339 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 [2024-09-20 13:15:54,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:15:54,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 111 [2024-09-20 13:16:12,567 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 [2024-09-20 13:16:12,585 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 [2024-09-20 13:16:12,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:12,621 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 60 treesize of output 52 [2024-09-20 13:16:12,634 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 61 treesize of output 37 [2024-09-20 13:16:12,664 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 [2024-09-20 13:16:12,679 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 13 [2024-09-20 13:16:16,997 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 26 treesize of output 14 [2024-09-20 13:16:17,010 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 [2024-09-20 13:16:17,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:17,044 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 36 treesize of output 28 [2024-09-20 13:16:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 13:16:17,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:25,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:25,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929967070] [2024-09-20 13:16:25,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:25,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496544991] [2024-09-20 13:16:25,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496544991] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:25,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:25,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2024-09-20 13:16:25,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079826587] [2024-09-20 13:16:25,738 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:25,738 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 13:16:25,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 13:16:25,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1404, Unknown=12, NotChecked=0, Total=1560 [2024-09-20 13:16:25,741 INFO L87 Difference]: Start difference. First operand 402 states and 464 transitions. Second operand has 35 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 10 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-20 13:16:29,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:33,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:38,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:46,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:51,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:55,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:17:00,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:17:05,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:17:10,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:17:14,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:17:20,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:17:24,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:17:30,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:17:34,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]