./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:20:08,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:20:08,609 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:20:08,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:20:08,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:20:08,640 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:20:08,641 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:20:08,642 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:20:08,642 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:20:08,643 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:20:08,643 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:20:08,644 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:20:08,644 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:20:08,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:20:08,645 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:20:08,645 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:20:08,647 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:20:08,647 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:20:08,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:20:08,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:20:08,648 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:20:08,651 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:20:08,651 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:20:08,651 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:20:08,652 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:20:08,652 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:20:08,652 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:20:08,653 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:20:08,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:20:08,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:20:08,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:20:08,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:20:08,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:20:08,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:20:08,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:20:08,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:20:08,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:20:08,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:20:08,655 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:20:08,655 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:20:08,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:20:08,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:20:08,657 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31cf2fabf53e081c3004f39943d7e98ce7bd9dc5e02db94d5bcffe73b0927449 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:20:08,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:20:08,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:20:08,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:20:08,957 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:20:08,958 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:20:08,959 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-10-15 15:20:10,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:20:10,533 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:20:10,534 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd3-ll.c [2024-10-15 15:20:10,543 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/69a468fd1/0fef64a4cf844d8aba4bc9e77d0d2281/FLAG052e82316 [2024-10-15 15:20:10,932 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/69a468fd1/0fef64a4cf844d8aba4bc9e77d0d2281 [2024-10-15 15:20:10,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:20:10,936 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:20:10,937 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:20:10,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:20:10,944 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:20:10,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:20:10" (1/1) ... [2024-10-15 15:20:10,945 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a7c3a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:10, skipping insertion in model container [2024-10-15 15:20:10,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:20:10" (1/1) ... [2024-10-15 15:20:10,966 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:20:11,127 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] [2024-10-15 15:20:11,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:20:11,168 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:20:11,177 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] [2024-10-15 15:20:11,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:20:11,211 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:20:11,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11 WrapperNode [2024-10-15 15:20:11,212 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:20:11,213 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:20:11,213 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:20:11,213 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:20:11,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,229 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,240 INFO L138 Inliner]: procedures = 18, calls = 127, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:20:11,240 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:20:11,241 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:20:11,241 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:20:11,241 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:20:11,251 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,260 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,289 INFO L175 MemorySlicer]: Split 77 memory accesses to 13 slices as follows [2, 5, 6, 6, 5, 6, 7, 7, 6, 5, 6, 9, 7]. 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, 2, 2, 2, 2, 1, 1, 2, 2, 2, 2, 2]. [2024-10-15 15:20:11,290 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,290 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,310 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,315 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,322 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,324 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,331 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:20:11,332 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:20:11,332 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:20:11,332 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:20:11,338 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (1/1) ... [2024-10-15 15:20:11,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:20:11,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:11,373 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) [2024-10-15 15:20:11,379 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 [2024-10-15 15:20:11,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:20:11,428 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 15:20:11,429 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 15:20:11,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:20:11,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:20:11,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:20:11,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:20:11,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-15 15:20:11,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-15 15:20:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-15 15:20:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-15 15:20:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-15 15:20:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-15 15:20:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-10-15 15:20:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-10-15 15:20:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-10-15 15:20:11,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-10-15 15:20:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-10-15 15:20:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_47_to_56_0 [2024-10-15 15:20:11,431 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_47_to_56_0 [2024-10-15 15:20:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_70_0 [2024-10-15 15:20:11,431 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_70_0 [2024-10-15 15:20:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 15:20:11,431 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_59_0 [2024-10-15 15:20:11,431 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_59_0 [2024-10-15 15:20:11,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 15:20:11,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 15:20:11,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-15 15:20:11,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-15 15:20:11,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-15 15:20:11,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-15 15:20:11,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-15 15:20:11,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-15 15:20:11,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-10-15 15:20:11,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-10-15 15:20:11,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-10-15 15:20:11,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-10-15 15:20:11,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-10-15 15:20:11,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:20:11,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:20:11,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:20:11,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:20:11,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 15:20:11,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 15:20:11,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-15 15:20:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-15 15:20:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-15 15:20:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-15 15:20:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-15 15:20:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-15 15:20:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-10-15 15:20:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-10-15 15:20:11,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-10-15 15:20:11,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-10-15 15:20:11,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-10-15 15:20:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 15:20:11,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 15:20:11,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 15:20:11,601 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:20:11,603 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:20:11,907 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-15 15:20:11,907 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:20:11,948 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:20:11,948 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-15 15:20:11,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:20:11 BoogieIcfgContainer [2024-10-15 15:20:11,949 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:20:11,950 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:20:11,950 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:20:11,956 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:20:11,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:20:10" (1/3) ... [2024-10-15 15:20:11,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2302525b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:20:11, skipping insertion in model container [2024-10-15 15:20:11,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:20:11" (2/3) ... [2024-10-15 15:20:11,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2302525b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:20:11, skipping insertion in model container [2024-10-15 15:20:11,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:20:11" (3/3) ... [2024-10-15 15:20:11,959 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd3-ll.c [2024-10-15 15:20:11,986 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:20:11,986 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:20:12,039 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:20:12,044 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@6b63ab18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:20:12,045 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:20:12,048 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) [2024-10-15 15:20:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-15 15:20:12,055 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:12,055 INFO L215 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] [2024-10-15 15:20:12,056 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:12,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash -107886040, now seen corresponding path program 1 times [2024-10-15 15:20:12,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:12,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623271937] [2024-10-15 15:20:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:12,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:12,340 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:20:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:12,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:20:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:12,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:20:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:12,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 15:20:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:20:12,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:12,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623271937] [2024-10-15 15:20:12,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623271937] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:20:12,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:20:12,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-15 15:20:12,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509626152] [2024-10-15 15:20:12,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:20:12,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-15 15:20:12,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-15 15:20:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 15:20:12,467 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) [2024-10-15 15:20:12,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:12,734 INFO L93 Difference]: Finished difference Result 112 states and 157 transitions. [2024-10-15 15:20:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-15 15:20:12,737 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 [2024-10-15 15:20:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:12,746 INFO L225 Difference]: With dead ends: 112 [2024-10-15 15:20:12,746 INFO L226 Difference]: Without dead ends: 58 [2024-10-15 15:20:12,751 INFO L431 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 [2024-10-15 15:20:12,757 INFO L432 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 [2024-10-15 15:20:12,758 INFO L433 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] [2024-10-15 15:20:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-15 15:20:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-10-15 15:20:12,813 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) [2024-10-15 15:20:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-10-15 15:20:12,819 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 27 [2024-10-15 15:20:12,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:12,821 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-10-15 15:20:12,821 INFO L472 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) [2024-10-15 15:20:12,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-10-15 15:20:12,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-15 15:20:12,825 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:12,825 INFO L215 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] [2024-10-15 15:20:12,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 15:20:12,826 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:12,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:12,826 INFO L85 PathProgramCache]: Analyzing trace with hash -832294486, now seen corresponding path program 1 times [2024-10-15 15:20:12,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:12,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927241423] [2024-10-15 15:20:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:12,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:13,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:20:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:13,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:20:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:13,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:20:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:13,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 15:20:13,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:20:13,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:13,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927241423] [2024-10-15 15:20:13,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927241423] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:20:13,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:20:13,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-15 15:20:13,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212035903] [2024-10-15 15:20:13,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:20:13,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 15:20:13,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:13,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 15:20:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:20:13,485 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) [2024-10-15 15:20:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:14,237 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2024-10-15 15:20:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-15 15:20:14,238 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 [2024-10-15 15:20:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:14,240 INFO L225 Difference]: With dead ends: 66 [2024-10-15 15:20:14,240 INFO L226 Difference]: Without dead ends: 58 [2024-10-15 15:20:14,240 INFO L431 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 [2024-10-15 15:20:14,243 INFO L432 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, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:14,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 99 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 15:20:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-15 15:20:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2024-10-15 15:20:14,262 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) [2024-10-15 15:20:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-10-15 15:20:14,263 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 28 [2024-10-15 15:20:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:14,264 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-10-15 15:20:14,264 INFO L472 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) [2024-10-15 15:20:14,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-10-15 15:20:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-15 15:20:14,266 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:14,266 INFO L215 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] [2024-10-15 15:20:14,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 15:20:14,266 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:14,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:14,267 INFO L85 PathProgramCache]: Analyzing trace with hash 701795806, now seen corresponding path program 1 times [2024-10-15 15:20:14,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:14,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962461035] [2024-10-15 15:20:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:14,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:14,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909916018] [2024-10-15 15:20:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:14,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:14,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:14,326 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) [2024-10-15 15:20:14,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:20:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:14,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-10-15 15:20:14,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:14,610 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 [2024-10-15 15:20:14,615 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 [2024-10-15 15:20:14,686 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 [2024-10-15 15:20:14,692 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 [2024-10-15 15:20:14,705 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 [2024-10-15 15:20:14,716 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 [2024-10-15 15:20:14,905 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 [2024-10-15 15:20:15,128 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 [2024-10-15 15:20:15,138 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 [2024-10-15 15:20:15,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-15 15:20:15,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-15 15:20:15,377 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 22 treesize of output 10 [2024-10-15 15:20:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:20:15,468 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:20:15,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:15,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962461035] [2024-10-15 15:20:15,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:15,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909916018] [2024-10-15 15:20:15,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909916018] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:20:15,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:20:15,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2024-10-15 15:20:15,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427431915] [2024-10-15 15:20:15,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:20:15,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 15:20:15,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:15,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 15:20:15,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2024-10-15 15:20:15,474 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 15:20:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:16,547 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2024-10-15 15:20:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 15:20:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-10-15 15:20:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:16,550 INFO L225 Difference]: With dead ends: 92 [2024-10-15 15:20:16,550 INFO L226 Difference]: Without dead ends: 88 [2024-10-15 15:20:16,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2024-10-15 15:20:16,554 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 38 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:16,557 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 456 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 15:20:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-15 15:20:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2024-10-15 15:20:16,581 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) [2024-10-15 15:20:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-10-15 15:20:16,583 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 32 [2024-10-15 15:20:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:16,583 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-10-15 15:20:16,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 15:20:16,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-10-15 15:20:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-15 15:20:16,587 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:16,587 INFO L215 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] [2024-10-15 15:20:16,608 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-15 15:20:16,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:16,788 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:16,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash -630586112, now seen corresponding path program 1 times [2024-10-15 15:20:16,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:16,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223327422] [2024-10-15 15:20:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:16,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534270738] [2024-10-15 15:20:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:16,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:16,840 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) [2024-10-15 15:20:16,845 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:20:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:17,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 185 conjuncts are in the unsatisfiable core [2024-10-15 15:20:17,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:17,041 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 [2024-10-15 15:20:17,044 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 [2024-10-15 15:20:17,050 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 [2024-10-15 15:20:17,054 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 [2024-10-15 15:20:17,061 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 [2024-10-15 15:20:17,067 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 [2024-10-15 15:20:17,169 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 [2024-10-15 15:20:17,176 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 11 [2024-10-15 15:20:17,285 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 [2024-10-15 15:20:17,487 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 [2024-10-15 15:20:17,490 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 [2024-10-15 15:20:17,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-15 15:20:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:20:17,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:20:18,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:18,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223327422] [2024-10-15 15:20:18,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:18,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534270738] [2024-10-15 15:20:18,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534270738] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:18,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:18,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 23 [2024-10-15 15:20:18,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510860772] [2024-10-15 15:20:18,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:20:18,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-15 15:20:18,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-15 15:20:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-10-15 15:20:18,033 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 15:20:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:19,170 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2024-10-15 15:20:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:20:19,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-10-15 15:20:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:19,174 INFO L225 Difference]: With dead ends: 113 [2024-10-15 15:20:19,174 INFO L226 Difference]: Without dead ends: 111 [2024-10-15 15:20:19,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2024-10-15 15:20:19,176 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 31 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:19,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 387 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 15:20:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-10-15 15:20:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2024-10-15 15:20:19,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.121212121212121) internal successors, (74), 74 states have internal predecessors, (74), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2024-10-15 15:20:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2024-10-15 15:20:19,212 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 38 [2024-10-15 15:20:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:19,213 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2024-10-15 15:20:19,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 15:20:19,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2024-10-15 15:20:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-15 15:20:19,214 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:19,214 INFO L215 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] [2024-10-15 15:20:19,228 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 15:20:19,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:19,415 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:19,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:19,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1663143179, now seen corresponding path program 1 times [2024-10-15 15:20:19,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:19,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072724740] [2024-10-15 15:20:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:19,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:20,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:20:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:20,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:20:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:20,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:20:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:20,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-15 15:20:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:20,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-15 15:20:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:20,631 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-15 15:20:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 15:20:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072724740] [2024-10-15 15:20:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072724740] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449926106] [2024-10-15 15:20:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:20,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:20,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:20,724 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) [2024-10-15 15:20:20,725 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 15:20:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:20,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-15 15:20:20,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:21,049 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 [2024-10-15 15:20:21,054 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 [2024-10-15 15:20:21,108 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 [2024-10-15 15:20:21,149 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 [2024-10-15 15:20:21,152 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 [2024-10-15 15:20:21,277 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 [2024-10-15 15:20:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:20:21,308 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:20:22,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449926106] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:20:22,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:20:22,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 40 [2024-10-15 15:20:22,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747203788] [2024-10-15 15:20:22,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:22,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-15 15:20:22,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:22,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-15 15:20:22,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 15:20:22,030 INFO L87 Difference]: Start difference. First operand 110 states and 133 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) [2024-10-15 15:20:26,104 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] [2024-10-15 15:20:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:27,490 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2024-10-15 15:20:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-15 15:20:27,491 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 [2024-10-15 15:20:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:27,493 INFO L225 Difference]: With dead ends: 138 [2024-10-15 15:20:27,493 INFO L226 Difference]: Without dead ends: 130 [2024-10-15 15:20:27,494 INFO L431 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 [2024-10-15 15:20:27,495 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 198 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 162 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:27,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 95 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1184 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-10-15 15:20:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-15 15:20:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-10-15 15:20:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 81 states have internal predecessors, (81), 31 states have call successors, (31), 15 states have call predecessors, (31), 17 states have return successors, (36), 29 states have call predecessors, (36), 29 states have call successors, (36) [2024-10-15 15:20:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 148 transitions. [2024-10-15 15:20:27,554 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 148 transitions. Word has length 41 [2024-10-15 15:20:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:27,557 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 148 transitions. [2024-10-15 15:20:27,557 INFO L472 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) [2024-10-15 15:20:27,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 148 transitions. [2024-10-15 15:20:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 15:20:27,559 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:27,559 INFO L215 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] [2024-10-15 15:20:27,580 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-15 15:20:27,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:27,760 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:27,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:27,760 INFO L85 PathProgramCache]: Analyzing trace with hash 467800380, now seen corresponding path program 1 times [2024-10-15 15:20:27,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:27,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887511416] [2024-10-15 15:20:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:27,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:27,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491158199] [2024-10-15 15:20:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:27,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:27,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:27,805 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) [2024-10-15 15:20:27,807 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 15:20:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:28,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 184 conjuncts are in the unsatisfiable core [2024-10-15 15:20:28,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:28,128 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 [2024-10-15 15:20:28,163 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 [2024-10-15 15:20:28,168 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 15 treesize of output 11 [2024-10-15 15:20:28,176 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 11 treesize of output 7 [2024-10-15 15:20:28,418 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 [2024-10-15 15:20:28,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:20:28,426 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 [2024-10-15 15:20:28,429 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 [2024-10-15 15:20:28,650 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 [2024-10-15 15:20:28,654 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 22 treesize of output 10 [2024-10-15 15:20:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-15 15:20:28,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:29,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:29,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887511416] [2024-10-15 15:20:29,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:29,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491158199] [2024-10-15 15:20:29,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491158199] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:29,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:29,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-15 15:20:29,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675918054] [2024-10-15 15:20:29,507 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:29,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 15:20:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 15:20:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2024-10-15 15:20:29,508 INFO L87 Difference]: Start difference. First operand 122 states and 148 transitions. Second operand has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-15 15:20:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:30,841 INFO L93 Difference]: Finished difference Result 174 states and 212 transitions. [2024-10-15 15:20:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-15 15:20:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2024-10-15 15:20:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:30,844 INFO L225 Difference]: With dead ends: 174 [2024-10-15 15:20:30,844 INFO L226 Difference]: Without dead ends: 170 [2024-10-15 15:20:30,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 15:20:30,848 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 70 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:30,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 690 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 15:20:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-15 15:20:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2024-10-15 15:20:30,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 100 states have (on average 1.12) internal successors, (112), 111 states have internal predecessors, (112), 41 states have call successors, (41), 20 states have call predecessors, (41), 24 states have return successors, (52), 39 states have call predecessors, (52), 39 states have call successors, (52) [2024-10-15 15:20:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 205 transitions. [2024-10-15 15:20:30,914 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 205 transitions. Word has length 43 [2024-10-15 15:20:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:30,915 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 205 transitions. [2024-10-15 15:20:30,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-15 15:20:30,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 205 transitions. [2024-10-15 15:20:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-15 15:20:30,920 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:30,920 INFO L215 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] [2024-10-15 15:20:30,940 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 15:20:31,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:31,125 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:31,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash 384099232, now seen corresponding path program 1 times [2024-10-15 15:20:31,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:31,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468572938] [2024-10-15 15:20:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:31,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:31,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128101944] [2024-10-15 15:20:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:31,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:31,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:31,177 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) [2024-10-15 15:20:31,180 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 15:20:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:31,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-15 15:20:31,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:31,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:31,393 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 [2024-10-15 15:20:31,397 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 [2024-10-15 15:20:31,613 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 [2024-10-15 15:20:31,617 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 [2024-10-15 15:20:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 15:20:31,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-15 15:20:31,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:31,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468572938] [2024-10-15 15:20:31,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:31,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128101944] [2024-10-15 15:20:31,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128101944] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:31,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:31,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2024-10-15 15:20:31,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692140106] [2024-10-15 15:20:31,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:20:31,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 15:20:31,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:31,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 15:20:31,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:20:31,761 INFO L87 Difference]: Start difference. First operand 166 states and 205 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) [2024-10-15 15:20:32,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:32,075 INFO L93 Difference]: Finished difference Result 218 states and 268 transitions. [2024-10-15 15:20:32,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 15:20:32,076 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 [2024-10-15 15:20:32,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:32,079 INFO L225 Difference]: With dead ends: 218 [2024-10-15 15:20:32,079 INFO L226 Difference]: Without dead ends: 216 [2024-10-15 15:20:32,079 INFO L431 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 [2024-10-15 15:20:32,080 INFO L432 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 [2024-10-15 15:20:32,081 INFO L433 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] [2024-10-15 15:20:32,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-10-15 15:20:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2024-10-15 15:20:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 130 states have (on average 1.123076923076923) internal successors, (146), 145 states have internal predecessors, (146), 53 states have call successors, (53), 26 states have call predecessors, (53), 30 states have return successors, (64), 49 states have call predecessors, (64), 51 states have call successors, (64) [2024-10-15 15:20:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 263 transitions. [2024-10-15 15:20:32,163 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 263 transitions. Word has length 44 [2024-10-15 15:20:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:32,164 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 263 transitions. [2024-10-15 15:20:32,164 INFO L472 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) [2024-10-15 15:20:32,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 263 transitions. [2024-10-15 15:20:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-15 15:20:32,166 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:32,166 INFO L215 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] [2024-10-15 15:20:32,184 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 15:20:32,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-15 15:20:32,368 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:32,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:32,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1953297954, now seen corresponding path program 1 times [2024-10-15 15:20:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:32,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272696405] [2024-10-15 15:20:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:32,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616379705] [2024-10-15 15:20:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:32,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:32,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:32,443 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) [2024-10-15 15:20:32,445 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 15:20:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:32,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 334 conjuncts are in the unsatisfiable core [2024-10-15 15:20:32,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:32,754 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 [2024-10-15 15:20:32,759 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 [2024-10-15 15:20:32,804 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 1 [2024-10-15 15:20:32,807 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 [2024-10-15 15:20:32,811 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 [2024-10-15 15:20:32,819 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 [2024-10-15 15:20:32,825 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 [2024-10-15 15:20:32,831 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 [2024-10-15 15:20:32,993 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 [2024-10-15 15:20:33,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-10-15 15:20:33,008 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 [2024-10-15 15:20:33,066 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 [2024-10-15 15:20:33,537 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 [2024-10-15 15:20:33,574 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-10-15 15:20:33,574 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 [2024-10-15 15:20:33,666 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-10-15 15:20:33,666 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 [2024-10-15 15:20:33,676 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-15 15:20:33,676 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 15 treesize of output 7 [2024-10-15 15:20:33,688 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-15 15:20:33,688 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 15 treesize of output 7 [2024-10-15 15:20:33,710 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-10-15 15:20:33,710 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 [2024-10-15 15:20:35,661 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:20:35,662 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 119 treesize of output 99 [2024-10-15 15:20:35,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:20:35,685 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 124 treesize of output 120 [2024-10-15 15:20:35,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:20:35,719 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 70 treesize of output 114 [2024-10-15 15:20:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:20:35,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:43,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:43,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272696405] [2024-10-15 15:20:43,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:43,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616379705] [2024-10-15 15:20:43,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616379705] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:43,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:43,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-10-15 15:20:43,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650793986] [2024-10-15 15:20:43,862 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:43,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-15 15:20:43,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-15 15:20:43,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=721, Unknown=3, NotChecked=0, Total=812 [2024-10-15 15:20:43,863 INFO L87 Difference]: Start difference. First operand 214 states and 263 transitions. Second operand has 27 states, 23 states have (on average 1.434782608695652) internal successors, (33), 20 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) [2024-10-15 15:20:47,930 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] [2024-10-15 15:20:51,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:51,272 INFO L93 Difference]: Finished difference Result 296 states and 354 transitions. [2024-10-15 15:20:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-15 15:20:51,273 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.434782608695652) internal successors, (33), 20 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 [2024-10-15 15:20:51,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:51,275 INFO L225 Difference]: With dead ends: 296 [2024-10-15 15:20:51,275 INFO L226 Difference]: Without dead ends: 292 [2024-10-15 15:20:51,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=196, Invalid=1871, Unknown=3, NotChecked=0, Total=2070 [2024-10-15 15:20:51,277 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 122 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:51,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 490 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1423 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2024-10-15 15:20:51,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-10-15 15:20:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 286. [2024-10-15 15:20:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 177 states have (on average 1.1242937853107344) internal successors, (199), 196 states have internal predecessors, (199), 67 states have call successors, (67), 37 states have call predecessors, (67), 41 states have return successors, (80), 61 states have call predecessors, (80), 65 states have call successors, (80) [2024-10-15 15:20:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 346 transitions. [2024-10-15 15:20:51,381 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 346 transitions. Word has length 49 [2024-10-15 15:20:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:51,382 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 346 transitions. [2024-10-15 15:20:51,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.434782608695652) internal successors, (33), 20 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) [2024-10-15 15:20:51,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:51,382 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 346 transitions. [2024-10-15 15:20:51,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-15 15:20:51,383 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:51,383 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:51,400 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-15 15:20:51,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:51,588 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:51,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1252856638, now seen corresponding path program 1 times [2024-10-15 15:20:51,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:51,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418974748] [2024-10-15 15:20:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:51,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:51,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025533818] [2024-10-15 15:20:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:51,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:51,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:51,623 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) [2024-10-15 15:20:51,625 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 15:20:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:51,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-15 15:20:51,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:51,825 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 [2024-10-15 15:20:51,827 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 [2024-10-15 15:20:51,829 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 [2024-10-15 15:20:51,831 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 [2024-10-15 15:20:51,835 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 [2024-10-15 15:20:52,019 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 [2024-10-15 15:20:52,022 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 [2024-10-15 15:20:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:20:52,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:20:52,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418974748] [2024-10-15 15:20:52,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025533818] [2024-10-15 15:20:52,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025533818] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:52,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:52,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-10-15 15:20:52,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605202534] [2024-10-15 15:20:52,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:20:52,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:20:52,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:52,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:20:52,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-10-15 15:20:52,183 INFO L87 Difference]: Start difference. First operand 286 states and 346 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) [2024-10-15 15:20:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:52,523 INFO L93 Difference]: Finished difference Result 337 states and 412 transitions. [2024-10-15 15:20:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:20:52,524 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 [2024-10-15 15:20:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:52,528 INFO L225 Difference]: With dead ends: 337 [2024-10-15 15:20:52,530 INFO L226 Difference]: Without dead ends: 335 [2024-10-15 15:20:52,530 INFO L431 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 [2024-10-15 15:20:52,531 INFO L432 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 [2024-10-15 15:20:52,531 INFO L433 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] [2024-10-15 15:20:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-10-15 15:20:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 298. [2024-10-15 15:20:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 186 states have (on average 1.1129032258064515) internal successors, (207), 205 states have internal predecessors, (207), 67 states have call successors, (67), 40 states have call predecessors, (67), 44 states have return successors, (80), 61 states have call predecessors, (80), 65 states have call successors, (80) [2024-10-15 15:20:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 354 transitions. [2024-10-15 15:20:52,689 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 354 transitions. Word has length 50 [2024-10-15 15:20:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:52,689 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 354 transitions. [2024-10-15 15:20:52,689 INFO L472 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) [2024-10-15 15:20:52,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 354 transitions. [2024-10-15 15:20:52,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-15 15:20:52,691 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:52,691 INFO L215 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] [2024-10-15 15:20:52,709 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 15:20:52,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:52,892 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:52,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash 177170206, now seen corresponding path program 2 times [2024-10-15 15:20:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:52,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558786463] [2024-10-15 15:20:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:52,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:54,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:20:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:54,572 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:20:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:54,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:20:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:54,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 15:20:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:54,707 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-15 15:20:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-15 15:20:54,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:54,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558786463] [2024-10-15 15:20:54,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558786463] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:54,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688593972] [2024-10-15 15:20:54,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:20:54,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:54,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:54,826 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) [2024-10-15 15:20:54,828 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 15:20:55,143 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:20:55,144 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:20:55,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-10-15 15:20:55,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:55,160 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 15 treesize of output 1 [2024-10-15 15:20:55,163 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 [2024-10-15 15:20:55,187 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 [2024-10-15 15:20:55,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2024-10-15 15:20:55,329 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 [2024-10-15 15:20:55,332 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 [2024-10-15 15:20:55,344 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 [2024-10-15 15:20:55,347 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 [2024-10-15 15:20:55,353 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 13 treesize of output 9 [2024-10-15 15:20:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-15 15:20:55,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:20:55,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688593972] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:20:55,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:20:55,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 13] total 29 [2024-10-15 15:20:55,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792077864] [2024-10-15 15:20:55,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:55,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-15 15:20:55,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:55,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-15 15:20:55,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2024-10-15 15:20:55,928 INFO L87 Difference]: Start difference. First operand 298 states and 354 transitions. Second operand has 29 states, 25 states have (on average 2.08) internal successors, (52), 21 states have internal predecessors, (52), 8 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-10-15 15:20:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:56,961 INFO L93 Difference]: Finished difference Result 388 states and 473 transitions. [2024-10-15 15:20:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 15:20:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.08) internal successors, (52), 21 states have internal predecessors, (52), 8 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2024-10-15 15:20:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:56,964 INFO L225 Difference]: With dead ends: 388 [2024-10-15 15:20:56,964 INFO L226 Difference]: Without dead ends: 308 [2024-10-15 15:20:56,966 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 15:20:56,966 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:56,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 156 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-15 15:20:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-10-15 15:20:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 290. [2024-10-15 15:20:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 182 states have (on average 1.098901098901099) internal successors, (200), 198 states have internal predecessors, (200), 66 states have call successors, (66), 40 states have call predecessors, (66), 41 states have return successors, (74), 60 states have call predecessors, (74), 64 states have call successors, (74) [2024-10-15 15:20:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 340 transitions. [2024-10-15 15:20:57,099 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 340 transitions. Word has length 54 [2024-10-15 15:20:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:57,101 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 340 transitions. [2024-10-15 15:20:57,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.08) internal successors, (52), 21 states have internal predecessors, (52), 8 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-10-15 15:20:57,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:57,102 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 340 transitions. [2024-10-15 15:20:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-15 15:20:57,103 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:57,103 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:57,123 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-15 15:20:57,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:57,304 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:57,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash 57984886, now seen corresponding path program 1 times [2024-10-15 15:20:57,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:57,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514254990] [2024-10-15 15:20:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:57,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:58,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:20:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:58,592 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:20:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:58,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:20:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:58,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-15 15:20:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:58,853 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:20:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:58,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:20:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:58,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:20:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:58,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 15:20:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 15:20:58,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:58,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514254990] [2024-10-15 15:20:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514254990] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:20:58,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:20:58,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-10-15 15:20:58,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527217328] [2024-10-15 15:20:58,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:20:58,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-15 15:20:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-15 15:20:58,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2024-10-15 15:20:58,878 INFO L87 Difference]: Start difference. First operand 290 states and 340 transitions. Second operand has 13 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-15 15:20:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:59,561 INFO L93 Difference]: Finished difference Result 550 states and 675 transitions. [2024-10-15 15:20:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:20:59,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 67 [2024-10-15 15:20:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:59,565 INFO L225 Difference]: With dead ends: 550 [2024-10-15 15:20:59,565 INFO L226 Difference]: Without dead ends: 348 [2024-10-15 15:20:59,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-10-15 15:20:59,567 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 41 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:59,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 256 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 15:20:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-10-15 15:20:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 336. [2024-10-15 15:20:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 211 states have (on average 1.085308056872038) internal successors, (229), 227 states have internal predecessors, (229), 71 states have call successors, (71), 44 states have call predecessors, (71), 53 states have return successors, (95), 65 states have call predecessors, (95), 69 states have call successors, (95) [2024-10-15 15:20:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 395 transitions. [2024-10-15 15:20:59,717 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 395 transitions. Word has length 67 [2024-10-15 15:20:59,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:59,718 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 395 transitions. [2024-10-15 15:20:59,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-15 15:20:59,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:59,718 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 395 transitions. [2024-10-15 15:20:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-15 15:20:59,719 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:59,720 INFO L215 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] [2024-10-15 15:20:59,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-15 15:20:59,720 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:59,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:59,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1050777586, now seen corresponding path program 1 times [2024-10-15 15:20:59,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:59,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572256015] [2024-10-15 15:20:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:59,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:59,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607385948] [2024-10-15 15:20:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:59,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:59,805 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) [2024-10-15 15:20:59,807 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 15:21:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:00,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 218 conjuncts are in the unsatisfiable core [2024-10-15 15:21:00,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:00,213 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 [2024-10-15 15:21:00,329 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 [2024-10-15 15:21:00,338 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 [2024-10-15 15:21:00,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:21:00,357 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 15 treesize of output 11 [2024-10-15 15:21:00,365 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 11 treesize of output 7 [2024-10-15 15:21:00,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:21:00,436 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 [2024-10-15 15:21:00,445 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 [2024-10-15 15:21:00,749 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 [2024-10-15 15:21:00,774 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 [2024-10-15 15:21:00,894 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 [2024-10-15 15:21:01,051 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 [2024-10-15 15:21:01,061 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 [2024-10-15 15:21:01,129 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 [2024-10-15 15:21:01,443 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 [2024-10-15 15:21:01,670 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 [2024-10-15 15:21:01,722 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 35 treesize of output 21 [2024-10-15 15:21:01,901 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 33 treesize of output 25 [2024-10-15 15:21:02,560 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 [2024-10-15 15:21:02,568 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 [2024-10-15 15:21:02,579 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 38 treesize of output 26 [2024-10-15 15:21:02,582 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 38 treesize of output 26 [2024-10-15 15:21:02,594 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 [2024-10-15 15:21:02,603 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 [2024-10-15 15:21:02,687 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 [2024-10-15 15:21:02,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:02,699 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 40 treesize of output 32 [2024-10-15 15:21:02,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:21:02,717 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 36 treesize of output 52 [2024-10-15 15:21:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-15 15:21:02,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:07,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:07,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572256015] [2024-10-15 15:21:07,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:07,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607385948] [2024-10-15 15:21:07,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607385948] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:07,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:07,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-10-15 15:21:07,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493712547] [2024-10-15 15:21:07,030 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:07,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-15 15:21:07,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:07,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-15 15:21:07,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 15:21:07,031 INFO L87 Difference]: Start difference. First operand 336 states and 395 transitions. Second operand has 32 states, 25 states have (on average 1.72) internal successors, (43), 25 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) [2024-10-15 15:21:11,042 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] [2024-10-15 15:21:15,053 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] [2024-10-15 15:21:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:19,700 INFO L93 Difference]: Finished difference Result 364 states and 437 transitions. [2024-10-15 15:21:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-15 15:21:19,701 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.72) internal successors, (43), 25 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) Word has length 78 [2024-10-15 15:21:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:19,703 INFO L225 Difference]: With dead ends: 364 [2024-10-15 15:21:19,703 INFO L226 Difference]: Without dead ends: 354 [2024-10-15 15:21:19,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2024-10-15 15:21:19,705 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 98 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:19,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 162 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1344 Invalid, 2 Unknown, 0 Unchecked, 11.1s Time] [2024-10-15 15:21:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2024-10-15 15:21:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 340. [2024-10-15 15:21:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 213 states have (on average 1.0845070422535212) internal successors, (231), 229 states have internal predecessors, (231), 72 states have call successors, (72), 44 states have call predecessors, (72), 54 states have return successors, (98), 67 states have call predecessors, (98), 70 states have call successors, (98) [2024-10-15 15:21:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 401 transitions. [2024-10-15 15:21:19,890 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 401 transitions. Word has length 78 [2024-10-15 15:21:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:19,890 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 401 transitions. [2024-10-15 15:21:19,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.72) internal successors, (43), 25 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) [2024-10-15 15:21:19,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 401 transitions. [2024-10-15 15:21:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-10-15 15:21:19,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:19,892 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:19,914 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 15:21:20,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-15 15:21:20,097 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:20,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash -134253589, now seen corresponding path program 1 times [2024-10-15 15:21:20,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:20,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377768313] [2024-10-15 15:21:20,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:20,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:21:20,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743937551] [2024-10-15 15:21:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:20,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:20,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:20,181 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:21:20,182 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 15:21:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:20,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 322 conjuncts are in the unsatisfiable core [2024-10-15 15:21:20,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:20,567 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 [2024-10-15 15:21:20,571 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 [2024-10-15 15:21:20,625 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 [2024-10-15 15:21:20,632 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 [2024-10-15 15:21:20,638 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 [2024-10-15 15:21:20,643 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 [2024-10-15 15:21:20,734 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 [2024-10-15 15:21:20,837 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 [2024-10-15 15:21:20,879 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 [2024-10-15 15:21:26,292 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 29 treesize of output 17 [2024-10-15 15:21:26,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2024-10-15 15:21:26,412 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-10-15 15:21:26,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 68 [2024-10-15 15:21:28,287 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 42 treesize of output 30 [2024-10-15 15:21:28,315 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 30 treesize of output 22 [2024-10-15 15:21:36,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-15 15:21:36,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2024-10-15 15:21:36,680 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 16 [2024-10-15 15:21:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-10-15 15:21:36,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:38,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:38,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377768313] [2024-10-15 15:21:38,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:38,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743937551] [2024-10-15 15:21:38,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743937551] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:38,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:38,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-10-15 15:21:38,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768570075] [2024-10-15 15:21:38,464 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:38,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-15 15:21:38,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:38,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-15 15:21:38,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1633, Unknown=3, NotChecked=0, Total=1806 [2024-10-15 15:21:38,466 INFO L87 Difference]: Start difference. First operand 340 states and 401 transitions. Second operand has 32 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 11 states have call successors, (15), 9 states have call predecessors, (15), 6 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-15 15:21:42,492 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] [2024-10-15 15:21:47,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:22:00,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:22:09,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:22:13,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:22:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:14,011 INFO L93 Difference]: Finished difference Result 380 states and 451 transitions. [2024-10-15 15:22:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-15 15:22:14,012 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 11 states have call successors, (15), 9 states have call predecessors, (15), 6 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 97 [2024-10-15 15:22:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:14,017 INFO L225 Difference]: With dead ends: 380 [2024-10-15 15:22:14,017 INFO L226 Difference]: Without dead ends: 378 [2024-10-15 15:22:14,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=346, Invalid=3554, Unknown=6, NotChecked=0, Total=3906 [2024-10-15 15:22:14,018 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 115 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 39 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:14,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 610 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1822 Invalid, 4 Unknown, 0 Unchecked, 21.2s Time] [2024-10-15 15:22:14,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2024-10-15 15:22:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 374. [2024-10-15 15:22:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 233 states have (on average 1.0858369098712446) internal successors, (253), 251 states have internal predecessors, (253), 81 states have call successors, (81), 47 states have call predecessors, (81), 59 states have return successors, (111), 77 states have call predecessors, (111), 79 states have call successors, (111) [2024-10-15 15:22:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 445 transitions. [2024-10-15 15:22:14,283 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 445 transitions. Word has length 97 [2024-10-15 15:22:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:14,284 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 445 transitions. [2024-10-15 15:22:14,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 11 states have call successors, (15), 9 states have call predecessors, (15), 6 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-15 15:22:14,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 445 transitions. [2024-10-15 15:22:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-10-15 15:22:14,285 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:14,286 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-10-15 15:22:14,309 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-15 15:22:14,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 15:22:14,487 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:14,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash 604449376, now seen corresponding path program 2 times [2024-10-15 15:22:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:14,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402015845] [2024-10-15 15:22:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:14,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133675138] [2024-10-15 15:22:14,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:22:14,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:14,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:14,592 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:14,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 15:22:15,084 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:22:15,084 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:22:15,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 361 conjuncts are in the unsatisfiable core [2024-10-15 15:22:15,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:15,108 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 [2024-10-15 15:22:15,111 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 [2024-10-15 15:22:15,142 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 [2024-10-15 15:22:15,148 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 [2024-10-15 15:22:15,156 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 [2024-10-15 15:22:15,163 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 [2024-10-15 15:22:15,292 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 [2024-10-15 15:22:15,430 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 [2024-10-15 15:22:15,476 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 [2024-10-15 15:22:29,882 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 29 treesize of output 17 [2024-10-15 15:22:30,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2024-10-15 15:22:30,053 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-10-15 15:22:30,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 68 [2024-10-15 15:22:38,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:38,898 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 105 treesize of output 125 [2024-10-15 15:22:38,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:38,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 52 [2024-10-15 15:22:39,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:39,464 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 43 treesize of output 39 [2024-10-15 15:22:39,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:39,497 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 85 treesize of output 121 [2024-10-15 15:22:39,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:39,532 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 113 treesize of output 141 [2024-10-15 15:22:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 36 proven. 65 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-10-15 15:22:39,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:42,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:42,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402015845] [2024-10-15 15:22:42,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:42,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133675138] [2024-10-15 15:22:42,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133675138] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:42,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:42,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2024-10-15 15:22:42,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262242485] [2024-10-15 15:22:42,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:42,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 15:22:42,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:42,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 15:22:42,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2180, Unknown=5, NotChecked=0, Total=2352 [2024-10-15 15:22:42,156 INFO L87 Difference]: Start difference. First operand 374 states and 445 transitions. Second operand has 36 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 12 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2024-10-15 15:22:56,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:23:02,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:23:19,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:23:24,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:23:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:27,066 INFO L93 Difference]: Finished difference Result 414 states and 495 transitions. [2024-10-15 15:23:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-15 15:23:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 12 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 127 [2024-10-15 15:23:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:27,069 INFO L225 Difference]: With dead ends: 414 [2024-10-15 15:23:27,069 INFO L226 Difference]: Without dead ends: 412 [2024-10-15 15:23:27,071 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 46.3s TimeCoverageRelationStatistics Valid=332, Invalid=4350, Unknown=10, NotChecked=0, Total=4692 [2024-10-15 15:23:27,071 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 54 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2502 mSolverCounterSat, 35 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2502 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2024-10-15 15:23:27,071 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 948 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2502 Invalid, 4 Unknown, 0 Unchecked, 21.9s Time] [2024-10-15 15:23:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2024-10-15 15:23:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 376. [2024-10-15 15:23:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 234 states have (on average 1.0854700854700854) internal successors, (254), 252 states have internal predecessors, (254), 81 states have call successors, (81), 47 states have call predecessors, (81), 60 states have return successors, (113), 78 states have call predecessors, (113), 79 states have call successors, (113) [2024-10-15 15:23:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 448 transitions. [2024-10-15 15:23:27,302 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 448 transitions. Word has length 127 [2024-10-15 15:23:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:27,302 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 448 transitions. [2024-10-15 15:23:27,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 12 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2024-10-15 15:23:27,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 448 transitions. [2024-10-15 15:23:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-10-15 15:23:27,304 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:27,304 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 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, 1, 1, 1, 1] [2024-10-15 15:23:27,317 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-15 15:23:27,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 15:23:27,505 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:27,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:27,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1562983877, now seen corresponding path program 1 times [2024-10-15 15:23:27,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:27,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030026003] [2024-10-15 15:23:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:27,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:23:27,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482884348] [2024-10-15 15:23:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:27,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:27,593 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:23:27,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 15:23:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:27,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 356 conjuncts are in the unsatisfiable core [2024-10-15 15:23:27,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:27,994 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 [2024-10-15 15:23:27,996 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 [2024-10-15 15:23:28,000 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 [2024-10-15 15:23:28,004 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 [2024-10-15 15:23:28,008 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 [2024-10-15 15:23:28,017 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 [2024-10-15 15:23:28,025 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 [2024-10-15 15:23:28,033 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 [2024-10-15 15:23:28,137 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 [2024-10-15 15:23:28,146 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 [2024-10-15 15:23:28,150 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 15 treesize of output 11 [2024-10-15 15:23:28,179 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 [2024-10-15 15:23:28,399 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 [2024-10-15 15:23:28,438 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 [2024-10-15 15:23:28,518 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 [2024-10-15 15:23:41,654 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 [2024-10-15 15:23:45,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:23:45,823 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 [2024-10-15 15:23:50,296 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 [2024-10-15 15:23:50,340 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-10-15 15:23:50,341 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 [2024-10-15 15:23:54,725 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-10-15 15:23:54,726 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 31 [2024-10-15 15:23:54,733 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-15 15:23:54,733 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 15 treesize of output 7 [2024-10-15 15:23:54,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:23:54,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 111 [2024-10-15 15:23:54,980 INFO L349 Elim1Store]: treesize reduction 160, result has 40.5 percent of original size [2024-10-15 15:23:54,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 154 treesize of output 216 [2024-10-15 15:23:55,210 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-10-15 15:23:55,211 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 [2024-10-15 15:23:57,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:23:57,508 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 100 treesize of output 148 [2024-10-15 15:23:57,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:23:57,569 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 102 treesize of output 178 [2024-10-15 15:23:57,586 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 139 treesize of output 103 [2024-10-15 15:23:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-15 15:23:57,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:24:06,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:06,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030026003] [2024-10-15 15:24:06,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:24:06,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482884348] [2024-10-15 15:24:06,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482884348] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:24:06,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:24:06,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2024-10-15 15:24:06,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874131449] [2024-10-15 15:24:06,564 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:24:06,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-15 15:24:06,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-15 15:24:06,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1740, Unknown=6, NotChecked=0, Total=1892 [2024-10-15 15:24:06,566 INFO L87 Difference]: Start difference. First operand 376 states and 448 transitions. Second operand has 31 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 11 states have call successors, (17), 10 states have call predecessors, (17), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-15 15:24:10,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:15,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:19,637 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]