./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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:53:43,665 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:53:43,745 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:53:43,752 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:53:43,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:53:43,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:53:43,788 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:53:43,788 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:53:43,789 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:53:43,790 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:53:43,790 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:53:43,791 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:53:43,791 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:53:43,792 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:53:43,793 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:53:43,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:53:43,794 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:53:43,794 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:53:43,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:53:43,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:53:43,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:53:43,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:53:43,798 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:53:43,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:53:43,799 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:53:43,799 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:53:43,799 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:53:43,799 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:53:43,800 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:53:43,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:53:43,800 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:53:43,800 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:53:43,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:53:43,801 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:53:43,804 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:53:43,804 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:53:43,805 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:53:43,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:53:43,805 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:53:43,805 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:53:43,805 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:53:43,806 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:53:43,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:53:44,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:53:44,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:53:44,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:53:44,191 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:53:44,191 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:53:44,192 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-09-15 19:53:45,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:53:45,934 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:53:45,934 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-09-15 19:53:45,944 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/d4c38e336/3e06a186d4254cb3a3b4bc896e3a6d3f/FLAG3c040c590 [2024-09-15 19:53:45,957 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/d4c38e336/3e06a186d4254cb3a3b4bc896e3a6d3f [2024-09-15 19:53:45,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:53:45,960 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:53:45,961 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:53:45,962 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:53:45,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:53:45,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:53:45" (1/1) ... [2024-09-15 19:53:45,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17508b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:45, skipping insertion in model container [2024-09-15 19:53:45,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:53:45" (1/1) ... [2024-09-15 19:53:45,986 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:53:46,138 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] [2024-09-15 19:53:46,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:53:46,196 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:53:46,210 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] [2024-09-15 19:53:46,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:53:46,267 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:53:46,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46 WrapperNode [2024-09-15 19:53:46,268 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:53:46,269 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:53:46,269 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:53:46,271 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:53:46,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,286 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,293 INFO L138 Inliner]: procedures = 18, calls = 127, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:53:46,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:53:46,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:53:46,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:53:46,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:53:46,304 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,309 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,333 INFO L175 MemorySlicer]: Split 77 memory accesses to 13 slices as follows [2, 6, 7, 7, 5, 6, 6, 5, 6, 5, 9, 7, 6]. 12 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. The 22 writes are split as follows [0, 2, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2]. [2024-09-15 19:53:46,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,355 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,360 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,362 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:53:46,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:53:46,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:53:46,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:53:46,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (1/1) ... [2024-09-15 19:53:46,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:53:46,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:46,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-15 19:53:46,413 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-15 19:53:46,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:53:46,464 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:53:46,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:53:46,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:53:46,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:53:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:53:46,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 19:53:46,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-15 19:53:46,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-15 19:53:46,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-15 19:53:46,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-15 19:53:46,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-15 19:53:46,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-15 19:53:46,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-09-15 19:53:46,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-09-15 19:53:46,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-09-15 19:53:46,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-09-15 19:53:46,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-09-15 19:53:46,467 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_47_to_56_0 [2024-09-15 19:53:46,467 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_47_to_56_0 [2024-09-15 19:53:46,467 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_70_0 [2024-09-15 19:53:46,468 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_70_0 [2024-09-15 19:53:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 19:53:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_59_0 [2024-09-15 19:53:46,468 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_59_0 [2024-09-15 19:53:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 19:53:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 19:53:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-15 19:53:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-15 19:53:46,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-15 19:53:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-15 19:53:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-15 19:53:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-15 19:53:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-09-15 19:53:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-09-15 19:53:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-09-15 19:53:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-09-15 19:53:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-09-15 19:53:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:53:46,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:53:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:53:46,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:53:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 19:53:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 19:53:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-15 19:53:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-15 19:53:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-15 19:53:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-15 19:53:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-15 19:53:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-15 19:53:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-09-15 19:53:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-09-15 19:53:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-09-15 19:53:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-09-15 19:53:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-09-15 19:53:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:53:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:53:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 19:53:46,629 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:53:46,632 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:53:47,046 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-15 19:53:47,047 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:53:47,069 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:53:47,069 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-15 19:53:47,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:53:47 BoogieIcfgContainer [2024-09-15 19:53:47,070 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:53:47,074 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:53:47,074 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:53:47,077 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:53:47,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:53:45" (1/3) ... [2024-09-15 19:53:47,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ee252a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:53:47, skipping insertion in model container [2024-09-15 19:53:47,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:46" (2/3) ... [2024-09-15 19:53:47,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ee252a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:53:47, skipping insertion in model container [2024-09-15 19:53:47,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:53:47" (3/3) ... [2024-09-15 19:53:47,082 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd3-ll.c [2024-09-15 19:53:47,099 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:53:47,099 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:53:47,152 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:53:47,161 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;@5565ce3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:53:47,161 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:53:47,167 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) [2024-09-15 19:53:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:53:47,181 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:47,182 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] [2024-09-15 19:53:47,182 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:47,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash -107886040, now seen corresponding path program 1 times [2024-09-15 19:53:47,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:47,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747823652] [2024-09-15 19:53:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:47,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:47,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:53:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:47,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:53:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:47,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:53:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:47,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:53:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:53:47,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:47,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747823652] [2024-09-15 19:53:47,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747823652] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:47,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:47,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 19:53:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967659965] [2024-09-15 19:53:47,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:47,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 19:53:47,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 19:53:47,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:53:47,616 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) [2024-09-15 19:53:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:47,902 INFO L93 Difference]: Finished difference Result 112 states and 157 transitions. [2024-09-15 19:53:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 19:53:47,907 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 [2024-09-15 19:53:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:47,915 INFO L225 Difference]: With dead ends: 112 [2024-09-15 19:53:47,915 INFO L226 Difference]: Without dead ends: 58 [2024-09-15 19:53:47,921 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 [2024-09-15 19:53:47,924 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 [2024-09-15 19:53:47,927 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] [2024-09-15 19:53:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-15 19:53:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-09-15 19:53:47,978 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) [2024-09-15 19:53:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-09-15 19:53:47,985 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 27 [2024-09-15 19:53:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:47,985 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-09-15 19:53:47,986 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) [2024-09-15 19:53:47,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-09-15 19:53:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 19:53:47,990 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:47,990 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] [2024-09-15 19:53:47,990 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:53:47,991 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:47,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:47,992 INFO L85 PathProgramCache]: Analyzing trace with hash -832294486, now seen corresponding path program 1 times [2024-09-15 19:53:47,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:47,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466709087] [2024-09-15 19:53:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:47,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:48,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:53:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:48,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:53:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:48,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:53:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:48,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:53:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 19:53:48,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:48,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466709087] [2024-09-15 19:53:48,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466709087] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:48,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:48,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-15 19:53:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179721126] [2024-09-15 19:53:48,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:48,711 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:53:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:53:48,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:53:48,717 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) [2024-09-15 19:53:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:49,442 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2024-09-15 19:53:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:53:49,442 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 [2024-09-15 19:53:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:49,444 INFO L225 Difference]: With dead ends: 66 [2024-09-15 19:53:49,444 INFO L226 Difference]: Without dead ends: 58 [2024-09-15 19:53:49,445 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:53:49,446 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 [2024-09-15 19:53:49,447 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] [2024-09-15 19:53:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-15 19:53:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2024-09-15 19:53:49,458 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) [2024-09-15 19:53:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-09-15 19:53:49,460 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 28 [2024-09-15 19:53:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:49,461 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-09-15 19:53:49,461 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) [2024-09-15 19:53:49,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-09-15 19:53:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 19:53:49,462 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:49,462 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] [2024-09-15 19:53:49,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:53:49,463 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:49,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:49,463 INFO L85 PathProgramCache]: Analyzing trace with hash 701795806, now seen corresponding path program 1 times [2024-09-15 19:53:49,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:49,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926826899] [2024-09-15 19:53:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:49,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:49,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584194270] [2024-09-15 19:53:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:49,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:49,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:49,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:53:49,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:53:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:49,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-09-15 19:53:49,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:49,780 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 [2024-09-15 19:53:49,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:49,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:49,804 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 [2024-09-15 19:53:50,084 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 19 treesize of output 11 [2024-09-15 19:53:50,089 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 [2024-09-15 19:53:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:53:50,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:53:50,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:50,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926826899] [2024-09-15 19:53:50,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:50,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584194270] [2024-09-15 19:53:50,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584194270] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:50,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:50,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-09-15 19:53:50,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822638587] [2024-09-15 19:53:50,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:50,154 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 19:53:50,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:50,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 19:53:50,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-09-15 19:53:50,158 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 8 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) [2024-09-15 19:53:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:50,635 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2024-09-15 19:53:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:53:50,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 8 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 [2024-09-15 19:53:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:50,637 INFO L225 Difference]: With dead ends: 89 [2024-09-15 19:53:50,637 INFO L226 Difference]: Without dead ends: 85 [2024-09-15 19:53:50,638 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-09-15 19:53:50,639 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:50,641 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 399 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:53:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-15 19:53:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2024-09-15 19:53:50,664 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) [2024-09-15 19:53:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-09-15 19:53:50,666 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 32 [2024-09-15 19:53:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:50,667 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-09-15 19:53:50,667 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 8 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) [2024-09-15 19:53:50,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-09-15 19:53:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-15 19:53:50,669 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:50,669 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] [2024-09-15 19:53:50,689 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:53:50,873 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 [2024-09-15 19:53:50,874 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:50,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash -630586112, now seen corresponding path program 1 times [2024-09-15 19:53:50,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:50,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844770315] [2024-09-15 19:53:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:50,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781559509] [2024-09-15 19:53:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:50,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:50,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:50,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:53:50,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:53:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:51,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-09-15 19:53:51,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:51,153 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 [2024-09-15 19:53:51,159 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 [2024-09-15 19:53:51,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:51,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:51,502 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 [2024-09-15 19:53:51,505 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 [2024-09-15 19:53:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:53:51,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:51,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:51,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844770315] [2024-09-15 19:53:51,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:51,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781559509] [2024-09-15 19:53:51,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781559509] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:53:51,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:53:51,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-15 19:53:51,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009029213] [2024-09-15 19:53:51,729 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:53:51,729 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 19:53:51,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:51,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 19:53:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:53:51,734 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) [2024-09-15 19:53:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:52,345 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2024-09-15 19:53:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:53:52,345 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 [2024-09-15 19:53:52,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:52,347 INFO L225 Difference]: With dead ends: 97 [2024-09-15 19:53:52,347 INFO L226 Difference]: Without dead ends: 95 [2024-09-15 19:53:52,348 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-15 19:53:52,349 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:52,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 400 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 19:53:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-15 19:53:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2024-09-15 19:53:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.125) internal successors, (63), 62 states have internal predecessors, (63), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2024-09-15 19:53:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2024-09-15 19:53:52,387 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 38 [2024-09-15 19:53:52,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:52,388 INFO L474 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2024-09-15 19:53:52,388 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) [2024-09-15 19:53:52,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2024-09-15 19:53:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 19:53:52,390 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:52,390 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] [2024-09-15 19:53:52,409 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:53:52,591 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 [2024-09-15 19:53:52,591 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:52,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:52,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1663143179, now seen corresponding path program 1 times [2024-09-15 19:53:52,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:52,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183598098] [2024-09-15 19:53:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:52,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:53,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:53:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:53,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:53:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:53,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:53:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:53,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:53:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:53,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 19:53:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:53,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 19:53:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 19:53:53,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:53,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183598098] [2024-09-15 19:53:53,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183598098] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:53:53,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770352510] [2024-09-15 19:53:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:53,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:53,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:53,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:53:53,797 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:53:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:53,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-15 19:53:53,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:54,108 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 [2024-09-15 19:53:54,113 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 [2024-09-15 19:53:54,176 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 [2024-09-15 19:53:54,219 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 [2024-09-15 19:53:54,224 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 [2024-09-15 19:53:54,356 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 [2024-09-15 19:53:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:53:54,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 19:53:55,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770352510] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:53:55,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:53:55,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 40 [2024-09-15 19:53:55,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639202355] [2024-09-15 19:53:55,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:53:55,134 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-15 19:53:55,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-15 19:53:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 19:53:55,136 INFO L87 Difference]: Start difference. First operand 92 states and 108 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) [2024-09-15 19:53:59,194 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] [2024-09-15 19:54:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:00,644 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2024-09-15 19:54:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 19:54:00,645 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 [2024-09-15 19:54:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:00,646 INFO L225 Difference]: With dead ends: 116 [2024-09-15 19:54:00,646 INFO L226 Difference]: Without dead ends: 108 [2024-09-15 19:54:00,648 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 [2024-09-15 19:54:00,653 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 152 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 130 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:00,653 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 89 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1216 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-09-15 19:54:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-15 19:54:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2024-09-15 19:54:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 69 states have internal predecessors, (70), 24 states have call successors, (24), 14 states have call predecessors, (24), 16 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2024-09-15 19:54:00,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2024-09-15 19:54:00,700 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 41 [2024-09-15 19:54:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:00,700 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2024-09-15 19:54:00,701 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) [2024-09-15 19:54:00,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2024-09-15 19:54:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 19:54:00,703 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:00,703 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] [2024-09-15 19:54:00,717 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 19:54:00,904 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 [2024-09-15 19:54:00,904 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:00,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash 467800380, now seen corresponding path program 1 times [2024-09-15 19:54:00,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:00,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121125771] [2024-09-15 19:54:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:00,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:00,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045746072] [2024-09-15 19:54:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:00,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:00,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:00,955 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) [2024-09-15 19:54:00,957 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:54:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:01,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 260 conjuncts are in the unsatisfiable core [2024-09-15 19:54:01,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:01,270 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 [2024-09-15 19:54:01,274 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 15 treesize of output 1 [2024-09-15 19:54:01,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:01,339 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 [2024-09-15 19:54:01,346 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 [2024-09-15 19:54:01,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:01,517 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 [2024-09-15 19:54:01,559 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 [2024-09-15 19:54:02,001 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-15 19:54:02,001 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 66 treesize of output 73 [2024-09-15 19:54:02,039 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-15 19:54:02,039 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 49 treesize of output 60 [2024-09-15 19:54:02,051 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 56 treesize of output 40 [2024-09-15 19:54:02,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:02,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:02,771 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:02,772 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 86 treesize of output 138 [2024-09-15 19:54:03,815 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 32 treesize of output 20 [2024-09-15 19:54:03,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:03,859 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 82 treesize of output 118 [2024-09-15 19:54:03,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:03,892 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 49 treesize of output 69 [2024-09-15 19:54:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:54:04,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:06,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:06,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121125771] [2024-09-15 19:54:06,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:54:06,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045746072] [2024-09-15 19:54:06,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045746072] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:06,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:54:06,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-15 19:54:06,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575946163] [2024-09-15 19:54:06,239 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:54:06,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-15 19:54:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:06,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-15 19:54:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 19:54:06,241 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 9 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:54:10,300 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] [2024-09-15 19:54:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:14,502 INFO L93 Difference]: Finished difference Result 182 states and 215 transitions. [2024-09-15 19:54:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 19:54:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 9 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2024-09-15 19:54:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:14,505 INFO L225 Difference]: With dead ends: 182 [2024-09-15 19:54:14,505 INFO L226 Difference]: Without dead ends: 176 [2024-09-15 19:54:14,507 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=247, Invalid=2723, Unknown=0, NotChecked=0, Total=2970 [2024-09-15 19:54:14,507 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 115 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:14,508 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 482 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1657 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2024-09-15 19:54:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-09-15 19:54:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2024-09-15 19:54:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 96 states have internal predecessors, (98), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (42), 30 states have call predecessors, (42), 31 states have call successors, (42) [2024-09-15 19:54:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2024-09-15 19:54:14,599 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 43 [2024-09-15 19:54:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:14,599 INFO L474 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2024-09-15 19:54:14,600 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 20 states have internal predecessors, (29), 9 states have call successors, (10), 8 states have call predecessors, (10), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:54:14,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2024-09-15 19:54:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 19:54:14,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:14,603 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] [2024-09-15 19:54:14,624 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-15 19:54:14,803 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 [2024-09-15 19:54:14,804 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:14,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:14,804 INFO L85 PathProgramCache]: Analyzing trace with hash 384099232, now seen corresponding path program 1 times [2024-09-15 19:54:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:14,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358564592] [2024-09-15 19:54:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:14,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:14,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009511665] [2024-09-15 19:54:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:14,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:14,842 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) [2024-09-15 19:54:14,844 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:54:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:15,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-15 19:54:15,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:15,047 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 [2024-09-15 19:54:15,048 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 15 treesize of output 1 [2024-09-15 19:54:15,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:15,056 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 [2024-09-15 19:54:15,210 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 [2024-09-15 19:54:15,213 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 [2024-09-15 19:54:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:54:15,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:54:15,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:15,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358564592] [2024-09-15 19:54:15,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:54:15,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009511665] [2024-09-15 19:54:15,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009511665] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:15,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:54:15,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2024-09-15 19:54:15,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391100861] [2024-09-15 19:54:15,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:54:15,357 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 19:54:15,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:15,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 19:54:15,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:54:15,358 INFO L87 Difference]: Start difference. First operand 143 states and 173 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) [2024-09-15 19:54:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:15,719 INFO L93 Difference]: Finished difference Result 211 states and 258 transitions. [2024-09-15 19:54:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 19:54:15,720 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 [2024-09-15 19:54:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:15,727 INFO L225 Difference]: With dead ends: 211 [2024-09-15 19:54:15,728 INFO L226 Difference]: Without dead ends: 209 [2024-09-15 19:54:15,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:54:15,729 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 25 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:15,729 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 382 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:54:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-09-15 19:54:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2024-09-15 19:54:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 126 states have (on average 1.119047619047619) internal successors, (141), 140 states have internal predecessors, (141), 51 states have call successors, (51), 26 states have call predecessors, (51), 28 states have return successors, (60), 45 states have call predecessors, (60), 49 states have call successors, (60) [2024-09-15 19:54:15,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 252 transitions. [2024-09-15 19:54:15,843 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 252 transitions. Word has length 44 [2024-09-15 19:54:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:15,844 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 252 transitions. [2024-09-15 19:54:15,844 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) [2024-09-15 19:54:15,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 252 transitions. [2024-09-15 19:54:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 19:54:15,846 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:15,846 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] [2024-09-15 19:54:15,867 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-15 19:54:16,046 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 [2024-09-15 19:54:16,047 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:16,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1953297954, now seen corresponding path program 1 times [2024-09-15 19:54:16,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:16,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261230876] [2024-09-15 19:54:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:16,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:16,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067534683] [2024-09-15 19:54:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:16,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:16,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:16,098 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) [2024-09-15 19:54:16,099 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:54:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:16,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 285 conjuncts are in the unsatisfiable core [2024-09-15 19:54:16,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:16,363 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 15 treesize of output 1 [2024-09-15 19:54:16,365 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 [2024-09-15 19:54:16,406 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 [2024-09-15 19:54:16,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:16,414 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 11 treesize of output 7 [2024-09-15 19:54:16,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:16,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:16,429 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 [2024-09-15 19:54:16,577 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 [2024-09-15 19:54:16,583 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 [2024-09-15 19:54:16,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:16,677 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 [2024-09-15 19:54:17,110 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-15 19:54:17,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-15 19:54:17,133 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-15 19:54:17,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-15 19:54:17,145 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 [2024-09-15 19:54:17,178 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-15 19:54:17,179 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 [2024-09-15 19:54:19,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:19,227 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 46 treesize of output 38 [2024-09-15 19:54:19,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:19,268 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 82 treesize of output 134 [2024-09-15 19:54:19,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:19,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 156 [2024-09-15 19:54:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:54:19,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:19,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:19,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261230876] [2024-09-15 19:54:19,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:54:19,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067534683] [2024-09-15 19:54:19,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067534683] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:19,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:54:19,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-15 19:54:19,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506542471] [2024-09-15 19:54:19,672 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:54:19,673 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 19:54:19,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:19,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 19:54:19,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2024-09-15 19:54:19,674 INFO L87 Difference]: Start difference. First operand 206 states and 252 transitions. Second operand has 26 states, 22 states have (on average 1.5) internal successors, (33), 19 states have internal predecessors, (33), 9 states have call successors, (11), 9 states have call predecessors, (11), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 19:54:23,730 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] [2024-09-15 19:54:30,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:54:35,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:54:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:35,730 INFO L93 Difference]: Finished difference Result 240 states and 280 transitions. [2024-09-15 19:54:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 19:54:35,732 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.5) internal successors, (33), 19 states have internal predecessors, (33), 9 states have call successors, (11), 9 states have call predecessors, (11), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2024-09-15 19:54:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:35,736 INFO L225 Difference]: With dead ends: 240 [2024-09-15 19:54:35,736 INFO L226 Difference]: Without dead ends: 238 [2024-09-15 19:54:35,737 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2024-09-15 19:54:35,738 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 111 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:35,738 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 535 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1723 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2024-09-15 19:54:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-09-15 19:54:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2024-09-15 19:54:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 158 states have internal predecessors, (161), 51 states have call successors, (51), 32 states have call predecessors, (51), 34 states have return successors, (60), 45 states have call predecessors, (60), 49 states have call successors, (60) [2024-09-15 19:54:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 272 transitions. [2024-09-15 19:54:35,887 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 272 transitions. Word has length 49 [2024-09-15 19:54:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:35,888 INFO L474 AbstractCegarLoop]: Abstraction has 230 states and 272 transitions. [2024-09-15 19:54:35,888 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.5) internal successors, (33), 19 states have internal predecessors, (33), 9 states have call successors, (11), 9 states have call predecessors, (11), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 19:54:35,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 272 transitions. [2024-09-15 19:54:35,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-15 19:54:35,889 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:35,889 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] [2024-09-15 19:54:35,911 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 19:54:36,090 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 [2024-09-15 19:54:36,090 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:36,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:36,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1252856638, now seen corresponding path program 1 times [2024-09-15 19:54:36,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:36,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508223888] [2024-09-15 19:54:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:36,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:36,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978291965] [2024-09-15 19:54:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:36,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:36,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:36,166 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) [2024-09-15 19:54:36,174 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:54:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:36,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-15 19:54:36,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:36,384 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 [2024-09-15 19:54:36,390 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 11 treesize of output 7 [2024-09-15 19:54:36,394 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 [2024-09-15 19:54:36,571 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 [2024-09-15 19:54:36,575 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 [2024-09-15 19:54:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:54:36,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:54:36,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:36,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508223888] [2024-09-15 19:54:36,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:54:36,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978291965] [2024-09-15 19:54:36,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978291965] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:36,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:54:36,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-15 19:54:36,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822577318] [2024-09-15 19:54:36,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:54:36,741 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:54:36,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:54:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:54:36,742 INFO L87 Difference]: Start difference. First operand 230 states and 272 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) [2024-09-15 19:54:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:37,071 INFO L93 Difference]: Finished difference Result 271 states and 324 transitions. [2024-09-15 19:54:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:54:37,072 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 [2024-09-15 19:54:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:37,075 INFO L225 Difference]: With dead ends: 271 [2024-09-15 19:54:37,075 INFO L226 Difference]: Without dead ends: 269 [2024-09-15 19:54:37,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:54:37,076 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 16 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:37,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 307 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:54:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-09-15 19:54:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 242. [2024-09-15 19:54:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 153 states have (on average 1.1045751633986929) internal successors, (169), 167 states have internal predecessors, (169), 51 states have call successors, (51), 35 states have call predecessors, (51), 37 states have return successors, (60), 45 states have call predecessors, (60), 49 states have call successors, (60) [2024-09-15 19:54:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 280 transitions. [2024-09-15 19:54:37,223 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 280 transitions. Word has length 50 [2024-09-15 19:54:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:37,224 INFO L474 AbstractCegarLoop]: Abstraction has 242 states and 280 transitions. [2024-09-15 19:54:37,224 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) [2024-09-15 19:54:37,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 280 transitions. [2024-09-15 19:54:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 19:54:37,226 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:37,226 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2024-09-15 19:54:37,243 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-15 19:54:37,426 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 [2024-09-15 19:54:37,427 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:37,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:37,427 INFO L85 PathProgramCache]: Analyzing trace with hash 177170206, now seen corresponding path program 2 times [2024-09-15 19:54:37,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:37,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88611493] [2024-09-15 19:54:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:37,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:39,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:54:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:39,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:54:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:39,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:54:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:39,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:54:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:39,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:54:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-15 19:54:39,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:39,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88611493] [2024-09-15 19:54:39,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88611493] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:39,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982728667] [2024-09-15 19:54:39,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:54:39,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:39,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:39,253 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) [2024-09-15 19:54:39,257 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:54:39,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:54:39,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:54:39,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-09-15 19:54:39,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:39,635 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 [2024-09-15 19:54:39,675 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 [2024-09-15 19:54:39,808 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 29 treesize of output 21 [2024-09-15 19:54:39,813 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 [2024-09-15 19:54:39,816 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 [2024-09-15 19:54:39,891 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 [2024-09-15 19:54:39,935 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 [2024-09-15 19:54:40,049 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 [2024-09-15 19:54:40,052 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 29 treesize of output 21 [2024-09-15 19:54:40,057 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 [2024-09-15 19:54:40,136 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 [2024-09-15 19:54:40,141 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 [2024-09-15 19:54:40,258 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 [2024-09-15 19:54:40,261 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 [2024-09-15 19:54:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:54:40,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:54:40,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982728667] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:54:40,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:54:40,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 14] total 37 [2024-09-15 19:54:40,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366451104] [2024-09-15 19:54:40,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:54:40,718 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-15 19:54:40,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:40,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-15 19:54:40,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 19:54:40,719 INFO L87 Difference]: Start difference. First operand 242 states and 280 transitions. Second operand has 37 states, 35 states have (on average 2.085714285714286) internal successors, (73), 28 states have internal predecessors, (73), 13 states have call successors, (25), 13 states have call predecessors, (25), 6 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-15 19:54:44,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:49,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:51,176 INFO L93 Difference]: Finished difference Result 351 states and 409 transitions. [2024-09-15 19:54:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 19:54:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.085714285714286) internal successors, (73), 28 states have internal predecessors, (73), 13 states have call successors, (25), 13 states have call predecessors, (25), 6 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2024-09-15 19:54:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:51,180 INFO L225 Difference]: With dead ends: 351 [2024-09-15 19:54:51,180 INFO L226 Difference]: Without dead ends: 273 [2024-09-15 19:54:51,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=320, Invalid=2872, Unknown=0, NotChecked=0, Total=3192 [2024-09-15 19:54:51,183 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 134 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 96 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:51,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 314 Invalid, 2332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2234 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2024-09-15 19:54:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-09-15 19:54:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 254. [2024-09-15 19:54:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 164 states have (on average 1.0914634146341464) internal successors, (179), 176 states have internal predecessors, (179), 50 states have call successors, (50), 40 states have call predecessors, (50), 39 states have return successors, (53), 43 states have call predecessors, (53), 48 states have call successors, (53) [2024-09-15 19:54:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 282 transitions. [2024-09-15 19:54:51,357 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 282 transitions. Word has length 54 [2024-09-15 19:54:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:51,357 INFO L474 AbstractCegarLoop]: Abstraction has 254 states and 282 transitions. [2024-09-15 19:54:51,357 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.085714285714286) internal successors, (73), 28 states have internal predecessors, (73), 13 states have call successors, (25), 13 states have call predecessors, (25), 6 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-15 19:54:51,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 282 transitions. [2024-09-15 19:54:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-15 19:54:51,359 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:51,359 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:54:51,370 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-15 19:54:51,563 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 [2024-09-15 19:54:51,564 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:51,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:51,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1254324536, now seen corresponding path program 1 times [2024-09-15 19:54:51,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:51,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375020577] [2024-09-15 19:54:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:51,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:54:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:54:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:54:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 19:54:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:54:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:54:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:54:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 19:54:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-15 19:54:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-15 19:54:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-15 19:54:53,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375020577] [2024-09-15 19:54:53,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375020577] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:54:53,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:54:53,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-15 19:54:53,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747375778] [2024-09-15 19:54:53,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:54:53,416 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 19:54:53,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:53,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 19:54:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-15 19:54:53,418 INFO L87 Difference]: Start difference. First operand 254 states and 282 transitions. Second operand has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-15 19:54:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:54,264 INFO L93 Difference]: Finished difference Result 449 states and 520 transitions. [2024-09-15 19:54:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 19:54:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 79 [2024-09-15 19:54:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:54,268 INFO L225 Difference]: With dead ends: 449 [2024-09-15 19:54:54,268 INFO L226 Difference]: Without dead ends: 293 [2024-09-15 19:54:54,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2024-09-15 19:54:54,270 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:54,270 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 230 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 19:54:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-15 19:54:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 287. [2024-09-15 19:54:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 185 states have (on average 1.0810810810810811) internal successors, (200), 197 states have internal predecessors, (200), 53 states have call successors, (53), 43 states have call predecessors, (53), 48 states have return successors, (68), 46 states have call predecessors, (68), 51 states have call successors, (68) [2024-09-15 19:54:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 321 transitions. [2024-09-15 19:54:54,470 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 321 transitions. Word has length 79 [2024-09-15 19:54:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:54,470 INFO L474 AbstractCegarLoop]: Abstraction has 287 states and 321 transitions. [2024-09-15 19:54:54,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-15 19:54:54,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 321 transitions. [2024-09-15 19:54:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-15 19:54:54,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:54,472 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] [2024-09-15 19:54:54,472 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-15 19:54:54,472 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:54,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:54,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1050777586, now seen corresponding path program 1 times [2024-09-15 19:54:54,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:54,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143929155] [2024-09-15 19:54:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:54,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:54,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880521405] [2024-09-15 19:54:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:54,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:54,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:54,551 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) [2024-09-15 19:54:54,552 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:54:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:54,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 249 conjuncts are in the unsatisfiable core [2024-09-15 19:54:54,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:54,949 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 [2024-09-15 19:54:54,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:54,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:54,967 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 [2024-09-15 19:54:54,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:54,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:55,036 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 [2024-09-15 19:54:55,044 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 [2024-09-15 19:54:55,429 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 [2024-09-15 19:54:55,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:55,585 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 [2024-09-15 19:54:55,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:55,870 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 [2024-09-15 19:54:55,972 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 [2024-09-15 19:55:13,668 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 35 treesize of output 27 [2024-09-15 19:55:17,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:17,841 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 23 treesize of output 27 [2024-09-15 19:55:22,117 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 [2024-09-15 19:55:22,231 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-15 19:55:22,231 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 57 treesize of output 62 [2024-09-15 19:55:22,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:22,756 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 90 treesize of output 102 [2024-09-15 19:55:31,885 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 [2024-09-15 19:55:31,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:31,897 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 54 treesize of output 46 [2024-09-15 19:55:31,901 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 62 treesize of output 38 [2024-09-15 19:55:31,913 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 [2024-09-15 19:55:31,922 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 [2024-09-15 19:55:31,934 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 [2024-09-15 19:55:32,055 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 [2024-09-15 19:55:32,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:32,085 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 33 treesize of output 53 [2024-09-15 19:55:32,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:32,097 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 75 treesize of output 55 [2024-09-15 19:55:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-15 19:55:32,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:55:37,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:37,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143929155] [2024-09-15 19:55:37,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:55:37,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880521405] [2024-09-15 19:55:37,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880521405] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:55:37,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:55:37,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2024-09-15 19:55:37,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719411836] [2024-09-15 19:55:37,305 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:55:37,306 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 19:55:37,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:37,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 19:55:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1334, Unknown=8, NotChecked=0, Total=1482 [2024-09-15 19:55:37,308 INFO L87 Difference]: Start difference. First operand 287 states and 321 transitions. Second operand has 36 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 10 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-15 19:55:41,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:45,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:50,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:54,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:55:59,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:56:03,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:08,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:12,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:17,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:25,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:29,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:33,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:37,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:41,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:46,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:50,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:56:54,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:58,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:02,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:06,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:10,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:14,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:18,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:27,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:31,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:35,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:57:40,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:44,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:49,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:53,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:57,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:58:01,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:58:05,576 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]