./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-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 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:35:12,270 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:35:12,320 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:35:12,322 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:35:12,323 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:35:12,350 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:35:12,350 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:35:12,350 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:35:12,351 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:35:12,351 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:35:12,351 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:35:12,352 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:35:12,352 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:35:12,352 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:35:12,353 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:35:12,353 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:35:12,355 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:35:12,357 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:35:12,357 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:35:12,357 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:35:12,357 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:35:12,358 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:35:12,358 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:35:12,358 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:35:12,358 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:35:12,358 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:35:12,359 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:35:12,359 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:35:12,359 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:35:12,359 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:35:12,359 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:35:12,359 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:35:12,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:35:12,360 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:35:12,360 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:35:12,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:35:12,360 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:35:12,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:35:12,361 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:35:12,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:35:12,361 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:35:12,363 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:35:12,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 020f2d3a270ed8dfae4a7c8fa8db16a8ad645d088f685c7c500cf3124112cf45 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:35:12,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:35:12,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:35:12,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:35:12,563 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:35:12,564 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:35:12,565 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2024-09-11 20:35:13,788 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:35:13,919 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:35:13,920 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd2-ll.c [2024-09-11 20:35:13,926 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/d2f2ec338/6c0adda15f0d401facee2a5dc9580409/FLAGc03287f1d [2024-09-11 20:35:14,342 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/d2f2ec338/6c0adda15f0d401facee2a5dc9580409 [2024-09-11 20:35:14,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:35:14,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:35:14,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:35:14,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:35:14,351 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:35:14,352 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eac8c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14, skipping insertion in model container [2024-09-11 20:35:14,353 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,370 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:35:14,486 WARN L247 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_egcd2-ll.c[1037,1050] [2024-09-11 20:35:14,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:35:14,516 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:35:14,524 WARN L247 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_egcd2-ll.c[1037,1050] [2024-09-11 20:35:14,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:35:14,549 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:35:14,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14 WrapperNode [2024-09-11 20:35:14,549 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:35:14,550 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:35:14,550 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:35:14,550 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:35:14,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,562 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,580 INFO L138 Inliner]: procedures = 17, calls = 141, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 137 [2024-09-11 20:35:14,581 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:35:14,581 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:35:14,581 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:35:14,581 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:35:14,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,594 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,613 INFO L175 MemorySlicer]: Split 86 memory accesses to 13 slices as follows [2, 8, 5, 7, 12, 9, 8, 5, 7, 3, 7, 3, 10]. 14 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, 3, 1, 1, 2, 2, 2, 1, 3, 1, 2]. [2024-09-11 20:35:14,613 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,613 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,624 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,627 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,637 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:35:14,638 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:35:14,639 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:35:14,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:35:14,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:35:14,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:14,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-11 20:35:14,674 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-11 20:35:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:35:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 20:35:14,712 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 20:35:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:35:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:35:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-11 20:35:14,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-11 20:35:14,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-11 20:35:14,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-11 20:35:14,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-11 20:35:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-11 20:35:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-09-11 20:35:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-09-11 20:35:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-09-11 20:35:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-09-11 20:35:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-09-11 20:35:14,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-11 20:35:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 20:35:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 20:35:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-11 20:35:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-11 20:35:14,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-11 20:35:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-11 20:35:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-11 20:35:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-11 20:35:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-09-11 20:35:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2024-09-11 20:35:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2024-09-11 20:35:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2024-09-11 20:35:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2024-09-11 20:35:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_45_to_53_0 [2024-09-11 20:35:14,717 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_45_to_53_0 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_65_0 [2024-09-11 20:35:14,718 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_65_0 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:35:14,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2024-09-11 20:35:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2024-09-11 20:35:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2024-09-11 20:35:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2024-09-11 20:35:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:35:14,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:35:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:35:14,891 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:35:14,893 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:35:15,125 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-11 20:35:15,126 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:35:15,157 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:35:15,157 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 20:35:15,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:35:15 BoogieIcfgContainer [2024-09-11 20:35:15,157 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:35:15,159 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:35:15,159 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:35:15,161 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:35:15,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:35:14" (1/3) ... [2024-09-11 20:35:15,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4051ef09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:35:15, skipping insertion in model container [2024-09-11 20:35:15,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14" (2/3) ... [2024-09-11 20:35:15,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4051ef09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:35:15, skipping insertion in model container [2024-09-11 20:35:15,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:35:15" (3/3) ... [2024-09-11 20:35:15,164 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd2-ll.c [2024-09-11 20:35:15,179 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:35:15,179 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:35:15,225 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:35:15,231 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7e3f5f1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:35:15,232 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:35:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-11 20:35:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-11 20:35:15,241 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:15,242 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:15,242 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:15,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1748206812, now seen corresponding path program 1 times [2024-09-11 20:35:15,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:15,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283354213] [2024-09-11 20:35:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:15,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:15,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:35:15,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:15,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:35:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:15,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 20:35:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:15,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:35:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 20:35:15,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:15,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283354213] [2024-09-11 20:35:15,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283354213] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:35:15,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:35:15,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 20:35:15,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495987041] [2024-09-11 20:35:15,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:35:15,540 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 20:35:15,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 20:35:15,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 20:35:15,568 INFO L87 Difference]: Start difference. First operand has 48 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 20:35:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:15,649 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2024-09-11 20:35:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 20:35:15,652 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-09-11 20:35:15,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:15,662 INFO L225 Difference]: With dead ends: 94 [2024-09-11 20:35:15,666 INFO L226 Difference]: Without dead ends: 46 [2024-09-11 20:35:15,669 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 20:35:15,673 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:15,674 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:35:15,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-11 20:35:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-09-11 20:35:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 30 states have internal predecessors, (30), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-11 20:35:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2024-09-11 20:35:15,712 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 36 [2024-09-11 20:35:15,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:15,713 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2024-09-11 20:35:15,713 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 20:35:15,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:15,714 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2024-09-11 20:35:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-11 20:35:15,715 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:15,716 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:15,716 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:35:15,716 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:15,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash -754527188, now seen corresponding path program 1 times [2024-09-11 20:35:15,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:15,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225022674] [2024-09-11 20:35:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:15,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:15,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193879333] [2024-09-11 20:35:15,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:15,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:15,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:15,842 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 20:35:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:16,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-11 20:35:16,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:16,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:16,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:35:16,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:16,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:35:16,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:16,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:16,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:35:16,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:35:16,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-11 20:35:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 20:35:16,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:35:16,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:16,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225022674] [2024-09-11 20:35:16,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:16,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193879333] [2024-09-11 20:35:16,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193879333] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:35:16,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:35:16,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-11 20:35:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266579681] [2024-09-11 20:35:16,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:35:16,257 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:35:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:35:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:35:16,259 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-11 20:35:16,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:16,466 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-09-11 20:35:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:35:16,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2024-09-11 20:35:16,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:16,468 INFO L225 Difference]: With dead ends: 66 [2024-09-11 20:35:16,468 INFO L226 Difference]: Without dead ends: 64 [2024-09-11 20:35:16,468 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:35:16,469 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:16,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 306 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:35:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-11 20:35:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-09-11 20:35:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-09-11 20:35:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2024-09-11 20:35:16,507 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 36 [2024-09-11 20:35:16,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:16,508 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2024-09-11 20:35:16,508 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-11 20:35:16,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2024-09-11 20:35:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-11 20:35:16,509 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:16,509 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:16,543 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 20:35:16,709 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:16,710 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:16,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1375000559, now seen corresponding path program 1 times [2024-09-11 20:35:16,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:16,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382422187] [2024-09-11 20:35:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:16,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:17,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:35:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:17,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:35:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:17,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 20:35:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:17,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:35:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:17,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-11 20:35:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:35:17,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:17,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382422187] [2024-09-11 20:35:17,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382422187] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:17,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458526589] [2024-09-11 20:35:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:17,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:17,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:17,169 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:17,170 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 20:35:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:17,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-11 20:35:17,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:17,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:35:17,357 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 1 [2024-09-11 20:35:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 20:35:17,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:35:17,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458526589] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:35:17,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:35:17,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2024-09-11 20:35:17,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566480915] [2024-09-11 20:35:17,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:17,812 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 20:35:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 20:35:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2024-09-11 20:35:17,813 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 20 states have internal predecessors, (38), 7 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-11 20:35:21,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:35:26,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:35:30,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:35:34,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:35:38,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:35:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:38,807 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2024-09-11 20:35:38,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 20:35:38,807 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 20 states have internal predecessors, (38), 7 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 36 [2024-09-11 20:35:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:38,809 INFO L225 Difference]: With dead ends: 127 [2024-09-11 20:35:38,809 INFO L226 Difference]: Without dead ends: 115 [2024-09-11 20:35:38,810 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2024-09-11 20:35:38,811 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 64 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:38,811 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 93 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 504 Invalid, 9 Unknown, 0 Unchecked, 20.6s Time] [2024-09-11 20:35:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-11 20:35:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2024-09-11 20:35:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 73 states have internal predecessors, (76), 28 states have call successors, (28), 12 states have call predecessors, (28), 14 states have return successors, (32), 26 states have call predecessors, (32), 27 states have call successors, (32) [2024-09-11 20:35:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2024-09-11 20:35:38,840 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 36 [2024-09-11 20:35:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:38,840 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2024-09-11 20:35:38,840 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 20 states have internal predecessors, (38), 7 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-11 20:35:38,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2024-09-11 20:35:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-11 20:35:38,841 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:38,841 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:38,854 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 20:35:39,042 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:39,042 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:39,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:39,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1363352137, now seen corresponding path program 1 times [2024-09-11 20:35:39,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:39,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947709561] [2024-09-11 20:35:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:39,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:39,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524362780] [2024-09-11 20:35:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:39,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:39,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:39,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:39,086 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 20:35:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:39,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-11 20:35:39,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:39,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:35:39,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:39,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:39,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:39,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:35:39,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:35:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 20:35:39,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:39,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:39,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947709561] [2024-09-11 20:35:39,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:39,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524362780] [2024-09-11 20:35:39,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524362780] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:39,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:39,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-11 20:35:39,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788151465] [2024-09-11 20:35:39,656 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:39,657 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 20:35:39,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:39,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 20:35:39,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-11 20:35:39,657 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-11 20:35:40,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:40,046 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2024-09-11 20:35:40,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 20:35:40,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2024-09-11 20:35:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:40,047 INFO L225 Difference]: With dead ends: 121 [2024-09-11 20:35:40,048 INFO L226 Difference]: Without dead ends: 119 [2024-09-11 20:35:40,048 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-09-11 20:35:40,052 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 24 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:40,053 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 309 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:35:40,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-11 20:35:40,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2024-09-11 20:35:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 76 states have internal predecessors, (79), 28 states have call successors, (28), 13 states have call predecessors, (28), 15 states have return successors, (32), 26 states have call predecessors, (32), 27 states have call successors, (32) [2024-09-11 20:35:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2024-09-11 20:35:40,077 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 42 [2024-09-11 20:35:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:40,078 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2024-09-11 20:35:40,078 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-11 20:35:40,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2024-09-11 20:35:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-11 20:35:40,079 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:40,079 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:40,094 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 20:35:40,279 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:40,280 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:40,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash 676224932, now seen corresponding path program 1 times [2024-09-11 20:35:40,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:40,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671827738] [2024-09-11 20:35:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:40,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:40,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154584100] [2024-09-11 20:35:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:40,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:40,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:40,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:40,315 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 20:35:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:40,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-09-11 20:35:40,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:40,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:35:40,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:35:40,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:40,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:40,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:40,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:41,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:41,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:35:41,493 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 22 treesize of output 22 [2024-09-11 20:35:41,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-11 20:35:41,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:35:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 20:35:41,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:41,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:41,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671827738] [2024-09-11 20:35:41,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:41,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154584100] [2024-09-11 20:35:41,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154584100] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:41,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:41,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:35:41,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903325057] [2024-09-11 20:35:41,739 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:41,739 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:35:41,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:41,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:35:41,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-09-11 20:35:41,740 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. Second operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 6 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-11 20:35:45,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:35:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:47,000 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2024-09-11 20:35:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 20:35:47,000 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 6 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2024-09-11 20:35:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:47,002 INFO L225 Difference]: With dead ends: 129 [2024-09-11 20:35:47,002 INFO L226 Difference]: Without dead ends: 127 [2024-09-11 20:35:47,002 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2024-09-11 20:35:47,003 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 79 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:47,003 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 342 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 643 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-09-11 20:35:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-11 20:35:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2024-09-11 20:35:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 78 states have (on average 1.0897435897435896) internal successors, (85), 82 states have internal predecessors, (85), 28 states have call successors, (28), 15 states have call predecessors, (28), 17 states have return successors, (32), 26 states have call predecessors, (32), 27 states have call successors, (32) [2024-09-11 20:35:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2024-09-11 20:35:47,062 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 48 [2024-09-11 20:35:47,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:47,063 INFO L474 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2024-09-11 20:35:47,063 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 6 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-11 20:35:47,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2024-09-11 20:35:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-11 20:35:47,064 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:47,064 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:47,083 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 20:35:47,264 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:47,265 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:47,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:47,265 INFO L85 PathProgramCache]: Analyzing trace with hash 711966141, now seen corresponding path program 1 times [2024-09-11 20:35:47,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:47,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351843197] [2024-09-11 20:35:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:47,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:47,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427035373] [2024-09-11 20:35:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:47,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:47,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:47,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:47,313 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 20:35:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:47,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 186 conjuncts are in the unsatisfiable core [2024-09-11 20:35:47,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:47,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:35:47,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:35:47,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2024-09-11 20:35:47,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:35:47,633 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 21 treesize of output 17 [2024-09-11 20:35:47,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:47,645 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 21 treesize of output 17 [2024-09-11 20:35:47,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:47,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:48,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-11 20:36:22,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:22,449 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 111 treesize of output 75 [2024-09-11 20:36:22,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:22,464 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 123 treesize of output 79 [2024-09-11 20:36:22,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:22,488 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 26 treesize of output 26 [2024-09-11 20:36:22,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:22,541 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 26 treesize of output 26 [2024-09-11 20:36:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 20:36:22,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:36:23,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:36:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351843197] [2024-09-11 20:36:23,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:36:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427035373] [2024-09-11 20:36:23,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427035373] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:36:23,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:36:23,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-11 20:36:23,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212287681] [2024-09-11 20:36:23,187 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:36:23,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 20:36:23,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:36:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 20:36:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=527, Unknown=2, NotChecked=0, Total=600 [2024-09-11 20:36:23,188 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-11 20:36:27,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:36:33,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:36:37,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:36:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:36:38,850 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2024-09-11 20:36:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 20:36:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2024-09-11 20:36:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:36:38,851 INFO L225 Difference]: With dead ends: 133 [2024-09-11 20:36:38,851 INFO L226 Difference]: Without dead ends: 131 [2024-09-11 20:36:38,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=177, Invalid=1227, Unknown=2, NotChecked=0, Total=1406 [2024-09-11 20:36:38,853 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 112 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 53 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:36:38,854 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 334 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 537 Invalid, 3 Unknown, 0 Unchecked, 14.8s Time] [2024-09-11 20:36:38,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-11 20:36:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2024-09-11 20:36:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 85 states have internal predecessors, (88), 28 states have call successors, (28), 16 states have call predecessors, (28), 18 states have return successors, (32), 26 states have call predecessors, (32), 27 states have call successors, (32) [2024-09-11 20:36:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2024-09-11 20:36:38,902 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 54 [2024-09-11 20:36:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:36:38,902 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2024-09-11 20:36:38,902 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-11 20:36:38,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2024-09-11 20:36:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-11 20:36:38,903 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:36:38,903 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2024-09-11 20:36:38,920 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 20:36:39,103 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-11 20:36:39,104 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:36:39,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1336898608, now seen corresponding path program 1 times [2024-09-11 20:36:39,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:36:39,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227731314] [2024-09-11 20:36:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:36:39,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:36:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:36:39,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347535372] [2024-09-11 20:36:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:36:39,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:36:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:36:39,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:36:39,188 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 20:36:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:36:39,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-09-11 20:36:39,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:36:39,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:36:39,418 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 15 treesize of output 11 [2024-09-11 20:36:39,426 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 15 treesize of output 11 [2024-09-11 20:36:39,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:36:43,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:36:43,643 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 [2024-09-11 20:36:44,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:36:44,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:36:44,157 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 [2024-09-11 20:36:48,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-11 20:36:48,255 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 28 treesize of output 16 [2024-09-11 20:36:48,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-11 20:36:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-11 20:36:48,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:36:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-11 20:36:48,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:36:48,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227731314] [2024-09-11 20:36:48,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:36:48,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347535372] [2024-09-11 20:36:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347535372] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:36:48,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:36:48,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 25 [2024-09-11 20:36:48,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320015216] [2024-09-11 20:36:48,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:36:48,504 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 20:36:48,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:36:48,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 20:36:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=526, Unknown=2, NotChecked=0, Total=600 [2024-09-11 20:36:48,505 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand has 25 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (23), 9 states have call predecessors, (23), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-11 20:36:53,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:36:59,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:37:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:00,150 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2024-09-11 20:37:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-11 20:37:00,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (23), 9 states have call predecessors, (23), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 64 [2024-09-11 20:37:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:00,153 INFO L225 Difference]: With dead ends: 169 [2024-09-11 20:37:00,153 INFO L226 Difference]: Without dead ends: 167 [2024-09-11 20:37:00,154 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 93 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=246, Invalid=1914, Unknown=2, NotChecked=0, Total=2162 [2024-09-11 20:37:00,154 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 118 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 64 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:00,157 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 388 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 698 Invalid, 2 Unknown, 0 Unchecked, 10.8s Time] [2024-09-11 20:37:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-11 20:37:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2024-09-11 20:37:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 107 states have internal predecessors, (109), 33 states have call successors, (33), 21 states have call predecessors, (33), 24 states have return successors, (40), 32 states have call predecessors, (40), 32 states have call successors, (40) [2024-09-11 20:37:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2024-09-11 20:37:00,236 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 64 [2024-09-11 20:37:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:00,237 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2024-09-11 20:37:00,237 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (23), 9 states have call predecessors, (23), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-11 20:37:00,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2024-09-11 20:37:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-11 20:37:00,238 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:00,238 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2024-09-11 20:37:00,252 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 20:37:00,438 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:00,439 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:00,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:00,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1343293503, now seen corresponding path program 1 times [2024-09-11 20:37:00,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:00,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715510995] [2024-09-11 20:37:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:00,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:37:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:37:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 20:37:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:37:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-11 20:37:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:37:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:37:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:37:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:37:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:37:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-11 20:37:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 20:37:01,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:01,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715510995] [2024-09-11 20:37:01,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715510995] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:01,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098092854] [2024-09-11 20:37:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:01,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:01,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:01,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:37:01,459 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 20:37:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-11 20:37:01,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:01,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:37:01,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:01,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:02,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:02,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:37:02,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:37:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 20:37:02,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:02,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098092854] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:02,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:37:02,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 31 [2024-09-11 20:37:02,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987806747] [2024-09-11 20:37:02,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:02,750 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-11 20:37:02,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:02,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-11 20:37:02,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 20:37:02,751 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand has 31 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 12 states have call successors, (19), 9 states have call predecessors, (19), 10 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-11 20:37:06,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:37:10,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:37:16,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:37:20,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:37:24,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:37:28,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:37:32,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:37:36,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-11 20:37:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:36,926 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2024-09-11 20:37:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-11 20:37:36,941 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 12 states have call successors, (19), 9 states have call predecessors, (19), 10 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) Word has length 73 [2024-09-11 20:37:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:36,942 INFO L225 Difference]: With dead ends: 178 [2024-09-11 20:37:36,942 INFO L226 Difference]: Without dead ends: 168 [2024-09-11 20:37:36,943 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=501, Invalid=3789, Unknown=0, NotChecked=0, Total=4290 [2024-09-11 20:37:36,944 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 148 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 128 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:36,944 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 142 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1265 Invalid, 8 Unknown, 0 Unchecked, 33.1s Time] [2024-09-11 20:37:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-09-11 20:37:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2024-09-11 20:37:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 105 states have (on average 1.0666666666666667) internal successors, (112), 110 states have internal predecessors, (112), 34 states have call successors, (34), 21 states have call predecessors, (34), 26 states have return successors, (45), 34 states have call predecessors, (45), 33 states have call successors, (45) [2024-09-11 20:37:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2024-09-11 20:37:37,038 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 73 [2024-09-11 20:37:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:37,038 INFO L474 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2024-09-11 20:37:37,039 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 12 states have call successors, (19), 9 states have call predecessors, (19), 10 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-11 20:37:37,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:37,039 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2024-09-11 20:37:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-11 20:37:37,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:37,040 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 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] [2024-09-11 20:37:37,053 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-11 20:37:37,240 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:37,240 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:37,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:37,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1742802459, now seen corresponding path program 1 times [2024-09-11 20:37:37,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:37,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372282075] [2024-09-11 20:37:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:37,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:37,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678875507] [2024-09-11 20:37:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:37,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:37,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:37:37,292 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 20:37:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:37,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 216 conjuncts are in the unsatisfiable core [2024-09-11 20:37:37,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:37,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:37,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:37,610 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 11 treesize of output 7 [2024-09-11 20:37:37,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:37,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:37:37,625 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 15 treesize of output 1 [2024-09-11 20:37:37,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:37,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:38,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:38,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:38,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:38,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2024-09-11 20:37:38,849 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-11 20:37:38,850 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 41 treesize of output 52 [2024-09-11 20:37:38,856 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 37 treesize of output 25 [2024-09-11 20:37:39,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:37:39,200 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 [2024-09-11 20:37:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 20:37:39,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:39,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:39,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372282075] [2024-09-11 20:37:39,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:39,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678875507] [2024-09-11 20:37:39,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678875507] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:39,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:39,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-11 20:37:39,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691633065] [2024-09-11 20:37:39,435 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:39,435 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 20:37:39,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 20:37:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2024-09-11 20:37:39,436 INFO L87 Difference]: Start difference. First operand 166 states and 191 transitions. Second operand has 26 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-11 20:37:43,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:37:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:45,733 INFO L93 Difference]: Finished difference Result 228 states and 262 transitions. [2024-09-11 20:37:45,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-11 20:37:45,734 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 77 [2024-09-11 20:37:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:45,735 INFO L225 Difference]: With dead ends: 228 [2024-09-11 20:37:45,735 INFO L226 Difference]: Without dead ends: 222 [2024-09-11 20:37:45,736 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=269, Invalid=2487, Unknown=0, NotChecked=0, Total=2756 [2024-09-11 20:37:45,736 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 129 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:45,736 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 389 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 987 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2024-09-11 20:37:45,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-11 20:37:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2024-09-11 20:37:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 138 states have (on average 1.0724637681159421) internal successors, (148), 144 states have internal predecessors, (148), 45 states have call successors, (45), 28 states have call predecessors, (45), 33 states have return successors, (59), 44 states have call predecessors, (59), 44 states have call successors, (59) [2024-09-11 20:37:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 252 transitions. [2024-09-11 20:37:45,836 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 252 transitions. Word has length 77 [2024-09-11 20:37:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:45,837 INFO L474 AbstractCegarLoop]: Abstraction has 217 states and 252 transitions. [2024-09-11 20:37:45,837 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-11 20:37:45,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 252 transitions. [2024-09-11 20:37:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-11 20:37:45,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:45,838 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2024-09-11 20:37:45,853 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 20:37:46,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:46,039 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:46,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:46,039 INFO L85 PathProgramCache]: Analyzing trace with hash 71740918, now seen corresponding path program 2 times [2024-09-11 20:37:46,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:46,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454266967] [2024-09-11 20:37:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:46,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:46,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911402007] [2024-09-11 20:37:46,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:37:46,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:46,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:46,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:37:46,100 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 20:37:46,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:37:46,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:37:46,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 244 conjuncts are in the unsatisfiable core [2024-09-11 20:37:46,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:46,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:46,397 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 15 treesize of output 1 [2024-09-11 20:37:46,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:46,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:46,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:46,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:46,438 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 [2024-09-11 20:37:46,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:46,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-11 20:37:46,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:46,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:46,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:59,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:37:59,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-11 20:37:59,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:37:59,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-11 20:37:59,536 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 27 treesize of output 19 [2024-09-11 20:37:59,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:37:59,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:37:59,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:38:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-11 20:38:00,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:00,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:00,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454266967] [2024-09-11 20:38:00,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:00,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911402007] [2024-09-11 20:38:00,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911402007] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:00,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:00,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:38:00,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511945670] [2024-09-11 20:38:00,245 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:00,245 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:38:00,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:00,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:38:00,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=486, Unknown=2, NotChecked=0, Total=552 [2024-09-11 20:38:00,246 INFO L87 Difference]: Start difference. First operand 217 states and 252 transitions. Second operand has 22 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (15), 9 states have call predecessors, (15), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-11 20:38:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:06,614 INFO L93 Difference]: Finished difference Result 228 states and 261 transitions. [2024-09-11 20:38:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-11 20:38:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (15), 9 states have call predecessors, (15), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 83 [2024-09-11 20:38:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:06,616 INFO L225 Difference]: With dead ends: 228 [2024-09-11 20:38:06,617 INFO L226 Difference]: Without dead ends: 226 [2024-09-11 20:38:06,617 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 57 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=160, Invalid=1243, Unknown=3, NotChecked=0, Total=1406 [2024-09-11 20:38:06,617 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 51 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:06,618 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 481 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-11 20:38:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-09-11 20:38:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 221. [2024-09-11 20:38:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 141 states have (on average 1.070921985815603) internal successors, (151), 147 states have internal predecessors, (151), 45 states have call successors, (45), 29 states have call predecessors, (45), 34 states have return successors, (59), 44 states have call predecessors, (59), 44 states have call successors, (59) [2024-09-11 20:38:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 255 transitions. [2024-09-11 20:38:06,748 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 255 transitions. Word has length 83 [2024-09-11 20:38:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:06,748 INFO L474 AbstractCegarLoop]: Abstraction has 221 states and 255 transitions. [2024-09-11 20:38:06,748 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (15), 9 states have call predecessors, (15), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-11 20:38:06,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 255 transitions. [2024-09-11 20:38:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-11 20:38:06,749 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:06,749 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2024-09-11 20:38:06,765 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 20:38:06,950 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-11 20:38:06,950 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:06,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:06,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1144293007, now seen corresponding path program 3 times [2024-09-11 20:38:06,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:06,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610464512] [2024-09-11 20:38:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:06,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:06,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411110420] [2024-09-11 20:38:06,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:38:06,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:06,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:06,997 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:38:06,997 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 20:38:07,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 20:38:07,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:38:07,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 304 conjuncts are in the unsatisfiable core [2024-09-11 20:38:07,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:07,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:38:07,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:38:07,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:07,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:07,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:07,631 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 21 treesize of output 17 [2024-09-11 20:38:07,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:07,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:08,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:08,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:38:08,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:08,426 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 11 treesize of output 7 [2024-09-11 20:38:09,687 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 27 treesize of output 19 [2024-09-11 20:38:09,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:09,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:09,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:10,812 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 [2024-09-11 20:38:10,816 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 39 treesize of output 23 [2024-09-11 20:38:10,821 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 28 treesize of output 16 [2024-09-11 20:38:10,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-11 20:38:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 75 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-11 20:38:10,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:11,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:11,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610464512] [2024-09-11 20:38:11,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:11,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411110420] [2024-09-11 20:38:11,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411110420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:11,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:11,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:38:11,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555186781] [2024-09-11 20:38:11,283 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:11,283 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:38:11,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:11,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:38:11,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-09-11 20:38:11,284 INFO L87 Difference]: Start difference. First operand 221 states and 255 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 9 states have call successors, (16), 9 states have call predecessors, (16), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-11 20:38:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:14,235 INFO L93 Difference]: Finished difference Result 226 states and 259 transitions. [2024-09-11 20:38:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 20:38:14,236 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 9 states have call successors, (16), 9 states have call predecessors, (16), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 89 [2024-09-11 20:38:14,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:14,237 INFO L225 Difference]: With dead ends: 226 [2024-09-11 20:38:14,237 INFO L226 Difference]: Without dead ends: 224 [2024-09-11 20:38:14,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2024-09-11 20:38:14,238 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 57 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:14,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 434 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-11 20:38:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-11 20:38:14,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 221. [2024-09-11 20:38:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 141 states have (on average 1.0638297872340425) internal successors, (150), 147 states have internal predecessors, (150), 45 states have call successors, (45), 29 states have call predecessors, (45), 34 states have return successors, (59), 44 states have call predecessors, (59), 44 states have call successors, (59) [2024-09-11 20:38:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 254 transitions. [2024-09-11 20:38:14,396 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 254 transitions. Word has length 89 [2024-09-11 20:38:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:14,396 INFO L474 AbstractCegarLoop]: Abstraction has 221 states and 254 transitions. [2024-09-11 20:38:14,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 9 states have call successors, (16), 9 states have call predecessors, (16), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-11 20:38:14,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 254 transitions. [2024-09-11 20:38:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-11 20:38:14,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:14,397 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2024-09-11 20:38:14,407 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-11 20:38:14,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 20:38:14,598 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:14,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:14,599 INFO L85 PathProgramCache]: Analyzing trace with hash -914886710, now seen corresponding path program 1 times [2024-09-11 20:38:14,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:14,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024336787] [2024-09-11 20:38:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:14,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:14,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729309294] [2024-09-11 20:38:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:14,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:14,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:14,653 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:38:14,654 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 20:38:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:15,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 209 conjuncts are in the unsatisfiable core [2024-09-11 20:38:15,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:15,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:38:15,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:15,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:15,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:15,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:15,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:15,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:15,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:15,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:15,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:15,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:16,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:16,936 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 46 treesize of output 28 [2024-09-11 20:38:16,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:17,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-09-11 20:38:17,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-09-11 20:38:17,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:17,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:38:17,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:38:17,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:38:17,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 53 [2024-09-11 20:38:17,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:38:17,695 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 29 treesize of output 25 [2024-09-11 20:38:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 23 proven. 51 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-09-11 20:38:17,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:21,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:21,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024336787] [2024-09-11 20:38:21,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:21,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729309294] [2024-09-11 20:38:21,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729309294] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:21,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:21,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2024-09-11 20:38:21,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950587311] [2024-09-11 20:38:21,198 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:21,198 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-11 20:38:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-11 20:38:21,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2024-09-11 20:38:21,199 INFO L87 Difference]: Start difference. First operand 221 states and 254 transitions. Second operand has 36 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 27 states have internal predecessors, (49), 9 states have call successors, (17), 8 states have call predecessors, (17), 9 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-09-11 20:38:25,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:38:29,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:38:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:36,581 INFO L93 Difference]: Finished difference Result 240 states and 282 transitions. [2024-09-11 20:38:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-11 20:38:36,581 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 27 states have internal predecessors, (49), 9 states have call successors, (17), 8 states have call predecessors, (17), 9 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) Word has length 103 [2024-09-11 20:38:36,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:36,583 INFO L225 Difference]: With dead ends: 240 [2024-09-11 20:38:36,583 INFO L226 Difference]: Without dead ends: 238 [2024-09-11 20:38:36,584 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=503, Invalid=4609, Unknown=0, NotChecked=0, Total=5112 [2024-09-11 20:38:36,584 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 113 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:36,584 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 221 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1678 Invalid, 3 Unknown, 0 Unchecked, 11.2s Time] [2024-09-11 20:38:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-09-11 20:38:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2024-09-11 20:38:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 149 states have (on average 1.0604026845637584) internal successors, (158), 155 states have internal predecessors, (158), 47 states have call successors, (47), 30 states have call predecessors, (47), 38 states have return successors, (72), 49 states have call predecessors, (72), 46 states have call successors, (72) [2024-09-11 20:38:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 277 transitions. [2024-09-11 20:38:36,777 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 277 transitions. Word has length 103 [2024-09-11 20:38:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:36,777 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 277 transitions. [2024-09-11 20:38:36,777 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 27 states have internal predecessors, (49), 9 states have call successors, (17), 8 states have call predecessors, (17), 9 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2024-09-11 20:38:36,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 277 transitions. [2024-09-11 20:38:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-11 20:38:36,778 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:36,778 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:38:36,795 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 20:38:36,979 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:36,979 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:36,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:36,979 INFO L85 PathProgramCache]: Analyzing trace with hash 615307684, now seen corresponding path program 1 times [2024-09-11 20:38:36,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:36,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924089242] [2024-09-11 20:38:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:36,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:37,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433928941] [2024-09-11 20:38:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:37,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:37,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:37,027 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) [2024-09-11 20:38:37,031 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 20:38:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:37,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 254 conjuncts are in the unsatisfiable core [2024-09-11 20:38:37,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:37,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:38:37,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:37,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:38:37,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:37,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:37,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:37,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:37,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:37,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:38,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:38,716 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 46 treesize of output 28 [2024-09-11 20:38:38,814 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-11 20:38:38,814 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 83 treesize of output 86 [2024-09-11 20:38:38,818 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 49 treesize of output 33 [2024-09-11 20:38:38,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2024-09-11 20:38:38,862 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-11 20:38:38,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-11 20:38:38,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:39,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:38:39,107 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 95 treesize of output 143 [2024-09-11 20:38:47,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:47,497 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 [2024-09-11 20:38:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 16 proven. 67 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-11 20:38:47,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:47,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:47,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924089242] [2024-09-11 20:38:47,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:47,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433928941] [2024-09-11 20:38:47,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433928941] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:47,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:47,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-11 20:38:47,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189154482] [2024-09-11 20:38:47,770 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:47,770 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 20:38:47,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:47,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 20:38:47,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=625, Unknown=2, NotChecked=0, Total=702 [2024-09-11 20:38:47,771 INFO L87 Difference]: Start difference. First operand 235 states and 277 transitions. Second operand has 25 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (15), 8 states have call predecessors, (15), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-11 20:38:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:55,208 INFO L93 Difference]: Finished difference Result 300 states and 353 transitions. [2024-09-11 20:38:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-11 20:38:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (15), 8 states have call predecessors, (15), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 107 [2024-09-11 20:38:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:55,210 INFO L225 Difference]: With dead ends: 300 [2024-09-11 20:38:55,211 INFO L226 Difference]: Without dead ends: 298 [2024-09-11 20:38:55,211 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 65 SyntacticMatches, 22 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=167, Invalid=1552, Unknown=3, NotChecked=0, Total=1722 [2024-09-11 20:38:55,211 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 47 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:55,212 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 570 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-11 20:38:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-09-11 20:38:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 288. [2024-09-11 20:38:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 183 states have (on average 1.0710382513661203) internal successors, (196), 191 states have internal predecessors, (196), 57 states have call successors, (57), 37 states have call predecessors, (57), 47 states have return successors, (82), 59 states have call predecessors, (82), 56 states have call successors, (82) [2024-09-11 20:38:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2024-09-11 20:38:55,425 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 107 [2024-09-11 20:38:55,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:55,425 INFO L474 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2024-09-11 20:38:55,425 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 19 states have internal predecessors, (41), 9 states have call successors, (15), 8 states have call predecessors, (15), 5 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-11 20:38:55,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:55,425 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2024-09-11 20:38:55,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-11 20:38:55,426 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:55,426 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:38:55,444 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-11 20:38:55,627 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-11 20:38:55,627 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:55,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash 18697309, now seen corresponding path program 1 times [2024-09-11 20:38:55,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:55,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566870528] [2024-09-11 20:38:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:55,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211121460] [2024-09-11 20:38:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:55,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:55,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:55,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:38:55,679 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 20:38:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:55,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-09-11 20:38:55,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:55,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:38:55,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:55,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:55,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:55,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:56,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:56,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:56,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:56,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:56,503 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 [2024-09-11 20:38:56,568 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 [2024-09-11 20:38:56,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:56,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:56,793 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 [2024-09-11 20:38:56,795 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 [2024-09-11 20:38:56,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:56,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:56,953 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 [2024-09-11 20:38:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 64 proven. 19 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-09-11 20:38:57,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:58,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566870528] [2024-09-11 20:38:58,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211121460] [2024-09-11 20:38:58,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211121460] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:58,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:58,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:38:58,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444651530] [2024-09-11 20:38:58,577 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:58,577 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:38:58,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:58,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:38:58,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2024-09-11 20:38:58,578 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand has 22 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 9 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-11 20:39:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:01,882 INFO L93 Difference]: Finished difference Result 301 states and 354 transitions. [2024-09-11 20:39:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-11 20:39:01,882 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 9 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 109 [2024-09-11 20:39:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:01,884 INFO L225 Difference]: With dead ends: 301 [2024-09-11 20:39:01,884 INFO L226 Difference]: Without dead ends: 283 [2024-09-11 20:39:01,885 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=298, Invalid=2252, Unknown=0, NotChecked=0, Total=2550 [2024-09-11 20:39:01,885 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 119 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:01,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 129 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-11 20:39:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-11 20:39:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 278. [2024-09-11 20:39:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 177 states have (on average 1.0677966101694916) internal successors, (189), 184 states have internal predecessors, (189), 56 states have call successors, (56), 36 states have call predecessors, (56), 44 states have return successors, (79), 57 states have call predecessors, (79), 55 states have call successors, (79) [2024-09-11 20:39:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 324 transitions. [2024-09-11 20:39:02,111 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 324 transitions. Word has length 109 [2024-09-11 20:39:02,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:02,111 INFO L474 AbstractCegarLoop]: Abstraction has 278 states and 324 transitions. [2024-09-11 20:39:02,111 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 9 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-11 20:39:02,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 324 transitions. [2024-09-11 20:39:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-11 20:39:02,112 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:02,113 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 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] [2024-09-11 20:39:02,128 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-11 20:39:02,313 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 20:39:02,314 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:02,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash -556331857, now seen corresponding path program 2 times [2024-09-11 20:39:02,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:02,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799313103] [2024-09-11 20:39:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:02,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:02,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:39:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:02,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:39:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:02,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 20:39:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:02,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:39:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:02,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-11 20:39:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:39:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:39:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:39:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:39:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:39:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-11 20:39:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:39:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:39:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:39:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:39:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:39:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-11 20:39:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-11 20:39:03,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:03,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799313103] [2024-09-11 20:39:03,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799313103] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:39:03,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017796741] [2024-09-11 20:39:03,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:39:03,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:03,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:03,407 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:39:03,409 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-11 20:39:03,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:39:03,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:39:03,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-11 20:39:03,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:03,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:03,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:03,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-11 20:39:03,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:04,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:04,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-11 20:39:04,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-11 20:39:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-09-11 20:39:04,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:39:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-09-11 20:39:05,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017796741] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:39:05,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:39:05,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 37 [2024-09-11 20:39:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249229460] [2024-09-11 20:39:05,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:39:05,430 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-11 20:39:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-11 20:39:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2024-09-11 20:39:05,431 INFO L87 Difference]: Start difference. First operand 278 states and 324 transitions. Second operand has 37 states, 31 states have (on average 2.806451612903226) internal successors, (87), 29 states have internal predecessors, (87), 16 states have call successors, (39), 9 states have call predecessors, (39), 9 states have return successors, (36), 12 states have call predecessors, (36), 15 states have call successors, (36) [2024-09-11 20:39:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:07,251 INFO L93 Difference]: Finished difference Result 302 states and 380 transitions. [2024-09-11 20:39:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 20:39:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 31 states have (on average 2.806451612903226) internal successors, (87), 29 states have internal predecessors, (87), 16 states have call successors, (39), 9 states have call predecessors, (39), 9 states have return successors, (36), 12 states have call predecessors, (36), 15 states have call successors, (36) Word has length 110 [2024-09-11 20:39:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:07,253 INFO L225 Difference]: With dead ends: 302 [2024-09-11 20:39:07,253 INFO L226 Difference]: Without dead ends: 288 [2024-09-11 20:39:07,254 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=338, Invalid=2524, Unknown=0, NotChecked=0, Total=2862 [2024-09-11 20:39:07,254 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 67 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:07,255 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 208 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 20:39:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-09-11 20:39:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 282. [2024-09-11 20:39:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 179 states have (on average 1.0670391061452513) internal successors, (191), 186 states have internal predecessors, (191), 57 states have call successors, (57), 36 states have call predecessors, (57), 45 states have return successors, (83), 59 states have call predecessors, (83), 56 states have call successors, (83) [2024-09-11 20:39:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 331 transitions. [2024-09-11 20:39:07,489 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 331 transitions. Word has length 110 [2024-09-11 20:39:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:07,489 INFO L474 AbstractCegarLoop]: Abstraction has 282 states and 331 transitions. [2024-09-11 20:39:07,489 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 31 states have (on average 2.806451612903226) internal successors, (87), 29 states have internal predecessors, (87), 16 states have call successors, (39), 9 states have call predecessors, (39), 9 states have return successors, (36), 12 states have call predecessors, (36), 15 states have call successors, (36) [2024-09-11 20:39:07,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 331 transitions. [2024-09-11 20:39:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-11 20:39:07,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:07,490 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:39:07,506 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-11 20:39:07,691 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 20:39:07,691 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:07,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2105378551, now seen corresponding path program 4 times [2024-09-11 20:39:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:07,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381017684] [2024-09-11 20:39:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:07,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:39:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:39:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 20:39:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:39:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-11 20:39:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:39:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:39:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:39:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:39:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-11 20:39:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:39:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:39:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:39:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:39:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-11 20:39:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 51 proven. 3 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-09-11 20:39:09,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381017684] [2024-09-11 20:39:09,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381017684] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:39:09,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753925413] [2024-09-11 20:39:09,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:39:09,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:09,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:09,589 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:39:09,590 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 20:39:09,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:39:09,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:39:09,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-09-11 20:39:09,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:09,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:10,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-09-11 20:39:10,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:10,135 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-09-11 20:39:10,135 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 1 case distinctions, treesize of input 40 treesize of output 28 [2024-09-11 20:39:10,138 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 21 treesize of output 13 [2024-09-11 20:39:10,149 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 [2024-09-11 20:39:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-09-11 20:39:10,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:39:10,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753925413] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:39:10,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:39:10,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 22 [2024-09-11 20:39:10,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318083801] [2024-09-11 20:39:10,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:39:10,238 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 20:39:10,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:10,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 20:39:10,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-09-11 20:39:10,239 INFO L87 Difference]: Start difference. First operand 282 states and 331 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-11 20:39:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:11,081 INFO L93 Difference]: Finished difference Result 351 states and 418 transitions. [2024-09-11 20:39:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 20:39:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 112 [2024-09-11 20:39:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:11,083 INFO L225 Difference]: With dead ends: 351 [2024-09-11 20:39:11,083 INFO L226 Difference]: Without dead ends: 284 [2024-09-11 20:39:11,083 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-09-11 20:39:11,084 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:11,084 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 137 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 20:39:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-09-11 20:39:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2024-09-11 20:39:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 181 states have (on average 1.0607734806629834) internal successors, (192), 187 states have internal predecessors, (192), 58 states have call successors, (58), 37 states have call predecessors, (58), 44 states have return successors, (84), 59 states have call predecessors, (84), 57 states have call successors, (84) [2024-09-11 20:39:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 334 transitions. [2024-09-11 20:39:11,305 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 334 transitions. Word has length 112 [2024-09-11 20:39:11,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:11,305 INFO L474 AbstractCegarLoop]: Abstraction has 284 states and 334 transitions. [2024-09-11 20:39:11,305 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-11 20:39:11,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:11,305 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 334 transitions. [2024-09-11 20:39:11,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-11 20:39:11,306 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:11,306 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 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, 1] [2024-09-11 20:39:11,319 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-11 20:39:11,509 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 20:39:11,510 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:11,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:11,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1660686657, now seen corresponding path program 2 times [2024-09-11 20:39:11,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:11,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546151106] [2024-09-11 20:39:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:11,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:39:11,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969721655] [2024-09-11 20:39:11,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:39:11,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:11,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:11,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:39:11,575 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-11 20:39:11,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:39:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:39:11,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 300 conjuncts are in the unsatisfiable core [2024-09-11 20:39:11,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:11,994 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 [2024-09-11 20:39:11,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:12,017 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 15 treesize of output 11 [2024-09-11 20:39:12,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:12,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:12,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:12,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:12,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:39:12,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-11 20:39:12,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:39:12,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:12,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:29,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:42,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:42,035 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 46 treesize of output 28 [2024-09-11 20:39:42,147 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-09-11 20:39:42,147 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 68 treesize of output 75 [2024-09-11 20:39:42,154 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 77 treesize of output 57 [2024-09-11 20:39:42,201 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-09-11 20:39:42,202 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 [2024-09-11 20:39:42,214 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-09-11 20:39:42,214 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 [2024-09-11 20:39:42,233 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-11 20:39:42,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-11 20:39:44,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:39:44,249 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 118 treesize of output 194 [2024-09-11 20:39:44,293 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:39:44,294 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 190 treesize of output 210 [2024-09-11 20:39:44,311 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 [2024-09-11 20:39:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 10 proven. 123 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-09-11 20:39:44,528 INFO L327 TraceCheckSpWp]: Computing backward predicates...