./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-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 dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:21:49,373 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:21:49,432 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:21:49,437 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:21:49,438 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:21:49,454 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:21:49,454 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:21:49,455 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:21:49,455 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:21:49,455 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:21:49,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:21:49,456 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:21:49,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:21:49,456 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:21:49,457 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:21:49,457 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:21:49,457 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:21:49,458 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:21:49,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:21:49,458 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:21:49,458 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:21:49,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:21:49,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:21:49,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:21:49,459 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:21:49,460 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:21:49,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:21:49,460 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:21:49,460 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:21:49,461 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:21:49,461 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:21:49,461 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:21:49,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:21:49,461 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:21:49,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:21:49,462 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:21:49,462 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:21:49,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:21:49,462 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:21:49,463 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:21:49,463 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:21:49,463 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:21:49,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:21:49,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:21:49,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:21:49,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:21:49,670 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:21:49,670 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:21:49,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-10-15 15:21:50,859 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:21:50,984 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:21:50,985 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-10-15 15:21:50,990 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2b06fdf9c/2215c3d765554f3e868604c346787199/FLAG28dc662e7 [2024-10-15 15:21:51,409 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2b06fdf9c/2215c3d765554f3e868604c346787199 [2024-10-15 15:21:51,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:21:51,412 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:21:51,413 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:21:51,414 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:21:51,418 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:21:51,419 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,419 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb1691c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51, skipping insertion in model container [2024-10-15 15:21:51,419 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,437 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:21:51,549 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c[1083,1096] [2024-10-15 15:21:51,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:21:51,574 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:21:51,582 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c[1083,1096] [2024-10-15 15:21:51,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:21:51,606 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:21:51,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51 WrapperNode [2024-10-15 15:21:51,607 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:21:51,608 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:21:51,608 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:21:51,608 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:21:51,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,623 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:21:51,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:21:51,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:21:51,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:21:51,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:21:51,635 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,638 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,652 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 6, 5, 9, 8, 7, 12]. 24 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 2, 1, 3, 2, 1, 3]. [2024-10-15 15:21:51,652 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,652 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,658 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:21:51,664 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:21:51,664 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:21:51,664 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:21:51,665 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (1/1) ... [2024-10-15 15:21:51,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:21:51,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:51,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-15 15:21:51,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-15 15:21:51,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:21:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 15:21:51,779 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 15:21:51,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:21:51,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:21:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:21:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:21:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-15 15:21:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-15 15:21:51,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-15 15:21:51,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-15 15:21:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-15 15:21:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_51_0 [2024-10-15 15:21:51,782 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_51_0 [2024-10-15 15:21:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 15:21:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_38_0 [2024-10-15 15:21:51,782 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_38_0 [2024-10-15 15:21:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 15:21:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 15:21:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-15 15:21:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-15 15:21:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-15 15:21:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-15 15:21:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-15 15:21:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:21:51,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:21:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:21:51,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:21:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 15:21:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 15:21:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-15 15:21:51,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-15 15:21:51,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-15 15:21:51,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-15 15:21:51,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-15 15:21:51,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 15:21:51,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 15:21:51,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 15:21:51,895 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:21:51,896 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:21:52,145 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-10-15 15:21:52,146 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:21:52,158 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:21:52,159 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-15 15:21:52,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:21:52 BoogieIcfgContainer [2024-10-15 15:21:52,159 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:21:52,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:21:52,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:21:52,165 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:21:52,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:21:51" (1/3) ... [2024-10-15 15:21:52,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ceba1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:21:52, skipping insertion in model container [2024-10-15 15:21:52,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:21:51" (2/3) ... [2024-10-15 15:21:52,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ceba1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:21:52, skipping insertion in model container [2024-10-15 15:21:52,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:21:52" (3/3) ... [2024-10-15 15:21:52,167 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard-ll.c [2024-10-15 15:21:52,183 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:21:52,183 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:21:52,221 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:21:52,227 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e2511c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:21:52,227 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:21:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-15 15:21:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-15 15:21:52,235 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:52,235 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:52,236 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:52,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:52,240 INFO L85 PathProgramCache]: Analyzing trace with hash -261209268, now seen corresponding path program 1 times [2024-10-15 15:21:52,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:52,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051126392] [2024-10-15 15:21:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:52,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:52,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:21:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:52,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:21:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:21:52,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:52,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051126392] [2024-10-15 15:21:52,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051126392] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:21:52,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:21:52,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:21:52,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324599282] [2024-10-15 15:21:52,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:21:52,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:21:52,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:52,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:21:52,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:21:52,760 INFO L87 Difference]: Start difference. First operand has 50 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-15 15:21:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:52,916 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2024-10-15 15:21:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:21:52,919 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-10-15 15:21:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:52,924 INFO L225 Difference]: With dead ends: 96 [2024-10-15 15:21:52,924 INFO L226 Difference]: Without dead ends: 50 [2024-10-15 15:21:52,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:21:52,929 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:52,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 296 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:21:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-15 15:21:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-15 15:21:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-15 15:21:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-10-15 15:21:52,963 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 18 [2024-10-15 15:21:52,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:52,964 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-10-15 15:21:52,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-15 15:21:52,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:52,966 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-10-15 15:21:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-15 15:21:52,966 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:52,967 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:52,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 15:21:52,967 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:52,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash 249081250, now seen corresponding path program 1 times [2024-10-15 15:21:52,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:52,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412506691] [2024-10-15 15:21:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:53,378 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:21:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:53,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:21:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:53,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:21:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:21:53,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:53,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412506691] [2024-10-15 15:21:53,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412506691] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:21:53,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:21:53,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:21:53,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407082418] [2024-10-15 15:21:53,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:21:53,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:21:53,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:53,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:21:53,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:21:53,396 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 15:21:53,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:53,583 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2024-10-15 15:21:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:21:53,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-15 15:21:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:53,585 INFO L225 Difference]: With dead ends: 56 [2024-10-15 15:21:53,587 INFO L226 Difference]: Without dead ends: 54 [2024-10-15 15:21:53,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:21:53,588 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 17 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:53,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 279 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:21:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-15 15:21:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-15 15:21:53,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-15 15:21:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-10-15 15:21:53,608 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 24 [2024-10-15 15:21:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:53,608 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-10-15 15:21:53,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-15 15:21:53,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-10-15 15:21:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-15 15:21:53,612 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:53,612 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-15 15:21:53,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 15:21:53,613 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:53,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:53,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1395279990, now seen corresponding path program 1 times [2024-10-15 15:21:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:53,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538171797] [2024-10-15 15:21:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:53,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:21:53,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069535093] [2024-10-15 15:21:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:53,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:53,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:53,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:21:53,660 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:21:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:53,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-15 15:21:53,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:53,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:21:53,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:21:53,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:21:54,251 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 21 treesize of output 13 [2024-10-15 15:21:54,254 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 [2024-10-15 15:21:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:21:54,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:21:54,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:54,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538171797] [2024-10-15 15:21:54,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:54,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069535093] [2024-10-15 15:21:54,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069535093] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:54,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:54,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-10-15 15:21:54,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791997383] [2024-10-15 15:21:54,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:21:54,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:21:54,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:54,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:21:54,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-10-15 15:21:54,420 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 15:21:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:54,641 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2024-10-15 15:21:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:21:54,642 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), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-10-15 15:21:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:54,644 INFO L225 Difference]: With dead ends: 65 [2024-10-15 15:21:54,644 INFO L226 Difference]: Without dead ends: 63 [2024-10-15 15:21:54,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-10-15 15:21:54,645 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 15 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:54,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 271 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:21:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-15 15:21:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2024-10-15 15:21:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-15 15:21:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2024-10-15 15:21:54,659 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 30 [2024-10-15 15:21:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:54,659 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2024-10-15 15:21:54,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-15 15:21:54,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:54,660 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2024-10-15 15:21:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 15:21:54,661 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:54,661 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-10-15 15:21:54,669 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-15 15:21:54,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:54,866 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:54,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash -127824258, now seen corresponding path program 1 times [2024-10-15 15:21:54,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:54,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433078197] [2024-10-15 15:21:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:54,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:21:54,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571051505] [2024-10-15 15:21:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:54,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:54,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:54,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:21:54,898 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:21:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:55,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-15 15:21:55,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:55,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:21:55,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:21:55,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:21:55,268 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 [2024-10-15 15:21:55,272 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 [2024-10-15 15:21:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:21:55,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:21:55,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433078197] [2024-10-15 15:21:55,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571051505] [2024-10-15 15:21:55,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571051505] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:55,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:55,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-10-15 15:21:55,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499140460] [2024-10-15 15:21:55,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:21:55,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:21:55,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:21:55,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-15 15:21:55,445 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 8 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 15:21:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:21:55,624 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2024-10-15 15:21:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:21:55,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2024-10-15 15:21:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:21:55,626 INFO L225 Difference]: With dead ends: 78 [2024-10-15 15:21:55,626 INFO L226 Difference]: Without dead ends: 76 [2024-10-15 15:21:55,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-15 15:21:55,627 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 19 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:21:55,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 303 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:21:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-15 15:21:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-10-15 15:21:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 50 states have internal predecessors, (52), 17 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2024-10-15 15:21:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2024-10-15 15:21:55,648 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 42 [2024-10-15 15:21:55,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:21:55,649 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2024-10-15 15:21:55,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-15 15:21:55,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2024-10-15 15:21:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-15 15:21:55,650 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:21:55,650 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:21:55,664 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-15 15:21:55,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:55,852 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:21:55,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:21:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash -782540599, now seen corresponding path program 1 times [2024-10-15 15:21:55,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:21:55,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731721369] [2024-10-15 15:21:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:55,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:21:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:21:55,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716261681] [2024-10-15 15:21:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:21:55,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:21:55,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:21:55,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:21:55,883 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 15:21:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:21:56,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-10-15 15:21:56,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:21:56,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:21:56,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:21:56,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:21:56,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:21:56,418 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 [2024-10-15 15:21:56,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-15 15:21:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:21:56,465 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:21:56,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:21:56,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731721369] [2024-10-15 15:21:56,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:21:56,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716261681] [2024-10-15 15:21:56,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716261681] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:21:56,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:21:56,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-15 15:21:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115334528] [2024-10-15 15:21:56,886 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:21:56,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 15:21:56,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:21:56,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 15:21:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2024-10-15 15:21:56,887 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-15 15:22:00,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:22:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:01,723 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2024-10-15 15:22:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-15 15:22:01,724 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 48 [2024-10-15 15:22:01,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:01,726 INFO L225 Difference]: With dead ends: 132 [2024-10-15 15:22:01,726 INFO L226 Difference]: Without dead ends: 130 [2024-10-15 15:22:01,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2024-10-15 15:22:01,727 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:01,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 241 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 513 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2024-10-15 15:22:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-15 15:22:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2024-10-15 15:22:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 25 states have call successors, (25), 19 states have call predecessors, (25), 21 states have return successors, (31), 23 states have call predecessors, (31), 22 states have call successors, (31) [2024-10-15 15:22:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2024-10-15 15:22:01,774 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 48 [2024-10-15 15:22:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:01,775 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2024-10-15 15:22:01,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-15 15:22:01,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2024-10-15 15:22:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-15 15:22:01,779 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:01,779 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:22:01,793 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 15:22:01,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:01,980 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:01,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1885035655, now seen corresponding path program 1 times [2024-10-15 15:22:01,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:01,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168872630] [2024-10-15 15:22:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:01,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:02,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755219197] [2024-10-15 15:22:02,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:02,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:02,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:02,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:02,018 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 15:22:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:02,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-15 15:22:02,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:02,140 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 15 treesize of output 1 [2024-10-15 15:22:02,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:02,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:22:02,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:22:02,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-15 15:22:02,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-15 15:22:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:22:02,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:04,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:04,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168872630] [2024-10-15 15:22:04,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:04,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755219197] [2024-10-15 15:22:04,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755219197] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:04,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:04,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-10-15 15:22:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253296143] [2024-10-15 15:22:04,215 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:04,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:22:04,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:04,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:22:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-15 15:22:04,216 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-15 15:22:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:04,560 INFO L93 Difference]: Finished difference Result 153 states and 175 transitions. [2024-10-15 15:22:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:22:04,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2024-10-15 15:22:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:04,562 INFO L225 Difference]: With dead ends: 153 [2024-10-15 15:22:04,562 INFO L226 Difference]: Without dead ends: 149 [2024-10-15 15:22:04,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-15 15:22:04,563 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:04,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 93 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:22:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-10-15 15:22:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2024-10-15 15:22:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.098901098901099) internal successors, (100), 95 states have internal predecessors, (100), 28 states have call successors, (28), 22 states have call predecessors, (28), 23 states have return successors, (34), 26 states have call predecessors, (34), 24 states have call successors, (34) [2024-10-15 15:22:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2024-10-15 15:22:04,605 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 58 [2024-10-15 15:22:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:04,605 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2024-10-15 15:22:04,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-10-15 15:22:04,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2024-10-15 15:22:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-15 15:22:04,607 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:04,607 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2024-10-15 15:22:04,634 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-15 15:22:04,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:04,807 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:04,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:04,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1428903809, now seen corresponding path program 1 times [2024-10-15 15:22:04,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:04,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772415091] [2024-10-15 15:22:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:04,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:04,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:22:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:04,996 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:22:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:22:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:22:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,045 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:22:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:22:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,049 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-10-15 15:22:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-15 15:22:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-15 15:22:05,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:05,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772415091] [2024-10-15 15:22:05,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772415091] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:22:05,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:22:05,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:22:05,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72957380] [2024-10-15 15:22:05,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:22:05,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:22:05,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:05,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:22:05,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:22:05,057 INFO L87 Difference]: Start difference. First operand 143 states and 162 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-15 15:22:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:05,295 INFO L93 Difference]: Finished difference Result 198 states and 228 transitions. [2024-10-15 15:22:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 15:22:05,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 59 [2024-10-15 15:22:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:05,300 INFO L225 Difference]: With dead ends: 198 [2024-10-15 15:22:05,300 INFO L226 Difference]: Without dead ends: 145 [2024-10-15 15:22:05,301 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:22:05,301 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:05,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 110 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:22:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-10-15 15:22:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2024-10-15 15:22:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 94 states have internal predecessors, (98), 28 states have call successors, (28), 22 states have call predecessors, (28), 22 states have return successors, (30), 26 states have call predecessors, (30), 24 states have call successors, (30) [2024-10-15 15:22:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2024-10-15 15:22:05,344 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 59 [2024-10-15 15:22:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:05,344 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2024-10-15 15:22:05,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-10-15 15:22:05,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2024-10-15 15:22:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-15 15:22:05,346 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:05,346 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:22:05,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-15 15:22:05,346 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:05,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:05,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2096548347, now seen corresponding path program 1 times [2024-10-15 15:22:05,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:05,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099239466] [2024-10-15 15:22:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:05,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,822 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:22:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:22:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,835 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:22:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:22:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:22:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:22:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:05,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-15 15:22:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:06,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:22:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:06,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:22:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:06,018 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-15 15:22:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-15 15:22:06,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:06,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099239466] [2024-10-15 15:22:06,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099239466] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:22:06,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:22:06,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-10-15 15:22:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082814634] [2024-10-15 15:22:06,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:22:06,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 15:22:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 15:22:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-10-15 15:22:06,024 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-15 15:22:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:06,488 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2024-10-15 15:22:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-15 15:22:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 64 [2024-10-15 15:22:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:06,489 INFO L225 Difference]: With dead ends: 147 [2024-10-15 15:22:06,490 INFO L226 Difference]: Without dead ends: 115 [2024-10-15 15:22:06,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-10-15 15:22:06,490 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:06,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 123 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:22:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-15 15:22:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2024-10-15 15:22:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 23 states have call successors, (23), 17 states have call predecessors, (23), 17 states have return successors, (25), 21 states have call predecessors, (25), 20 states have call successors, (25) [2024-10-15 15:22:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2024-10-15 15:22:06,513 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 64 [2024-10-15 15:22:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:06,513 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2024-10-15 15:22:06,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-10-15 15:22:06,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2024-10-15 15:22:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-10-15 15:22:06,514 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:06,515 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 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] [2024-10-15 15:22:06,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-15 15:22:06,515 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:06,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:06,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1617999346, now seen corresponding path program 1 times [2024-10-15 15:22:06,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:06,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282265883] [2024-10-15 15:22:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:06,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:06,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898289721] [2024-10-15 15:22:06,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:06,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:06,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:06,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:06,554 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 15:22:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:06,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-10-15 15:22:06,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:06,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:22:06,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:06,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:22:06,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:22:06,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:22:06,959 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 31 treesize of output 19 [2024-10-15 15:22:07,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:22:07,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:22:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-15 15:22:07,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:07,531 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 20 treesize of output 16 [2024-10-15 15:22:07,535 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 16 treesize of output 12 [2024-10-15 15:22:19,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:19,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282265883] [2024-10-15 15:22:19,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:19,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898289721] [2024-10-15 15:22:19,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898289721] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:19,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:19,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-15 15:22:19,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819873982] [2024-10-15 15:22:19,627 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:19,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 15:22:19,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:19,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 15:22:19,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=358, Unknown=2, NotChecked=0, Total=420 [2024-10-15 15:22:19,628 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 15 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-15 15:22:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:20,258 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2024-10-15 15:22:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:22:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-10-15 15:22:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:20,259 INFO L225 Difference]: With dead ends: 151 [2024-10-15 15:22:20,260 INFO L226 Difference]: Without dead ends: 147 [2024-10-15 15:22:20,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=120, Invalid=580, Unknown=2, NotChecked=0, Total=702 [2024-10-15 15:22:20,260 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:20,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 172 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 530 Invalid, 1 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 15:22:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-10-15 15:22:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2024-10-15 15:22:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 94 states have internal predecessors, (99), 28 states have call successors, (28), 22 states have call predecessors, (28), 23 states have return successors, (35), 27 states have call predecessors, (35), 24 states have call successors, (35) [2024-10-15 15:22:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2024-10-15 15:22:20,291 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 72 [2024-10-15 15:22:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:20,291 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2024-10-15 15:22:20,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-15 15:22:20,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2024-10-15 15:22:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-15 15:22:20,292 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:20,292 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:22:20,306 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-15 15:22:20,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:20,497 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:20,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash -851672613, now seen corresponding path program 2 times [2024-10-15 15:22:20,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:20,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515519802] [2024-10-15 15:22:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:20,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870345284] [2024-10-15 15:22:20,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:22:20,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:20,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:20,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:20,574 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 15:22:20,700 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:22:20,700 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:22:20,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-10-15 15:22:20,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:20,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:22:20,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:20,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:22:20,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:22:21,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:22:21,109 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 31 treesize of output 19 [2024-10-15 15:22:21,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:22:21,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:22:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 54 proven. 28 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-10-15 15:22:21,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:22,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-15 15:22:22,043 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 16 treesize of output 12 [2024-10-15 15:22:30,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:30,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515519802] [2024-10-15 15:22:30,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:30,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870345284] [2024-10-15 15:22:30,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870345284] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:30,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:30,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-10-15 15:22:30,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348472383] [2024-10-15 15:22:30,636 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:30,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 15:22:30,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:30,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 15:22:30,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=438, Unknown=1, NotChecked=0, Total=506 [2024-10-15 15:22:30,637 INFO L87 Difference]: Start difference. First operand 143 states and 162 transitions. Second operand has 16 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2024-10-15 15:22:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:31,399 INFO L93 Difference]: Finished difference Result 181 states and 204 transitions. [2024-10-15 15:22:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 15:22:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 96 [2024-10-15 15:22:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:31,400 INFO L225 Difference]: With dead ends: 181 [2024-10-15 15:22:31,400 INFO L226 Difference]: Without dead ends: 177 [2024-10-15 15:22:31,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=121, Invalid=690, Unknown=1, NotChecked=0, Total=812 [2024-10-15 15:22:31,401 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 38 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:31,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 245 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 688 Invalid, 2 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 15:22:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-15 15:22:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2024-10-15 15:22:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 95 states have internal predecessors, (100), 28 states have call successors, (28), 22 states have call predecessors, (28), 24 states have return successors, (37), 28 states have call predecessors, (37), 24 states have call successors, (37) [2024-10-15 15:22:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2024-10-15 15:22:31,432 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 96 [2024-10-15 15:22:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:31,433 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2024-10-15 15:22:31,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2024-10-15 15:22:31,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2024-10-15 15:22:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-10-15 15:22:31,434 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:31,434 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2024-10-15 15:22:31,448 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-15 15:22:31,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-15 15:22:31,634 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:31,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:31,635 INFO L85 PathProgramCache]: Analyzing trace with hash 129307780, now seen corresponding path program 3 times [2024-10-15 15:22:31,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:31,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148718615] [2024-10-15 15:22:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:31,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:31,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588482239] [2024-10-15 15:22:31,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:22:31,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:31,690 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:31,691 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 15:22:31,975 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 15:22:31,975 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:22:31,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-10-15 15:22:31,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:31,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:22:32,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:32,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:22:32,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:22:32,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:22:32,408 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 31 treesize of output 19 [2024-10-15 15:22:32,568 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 23 treesize of output 15 [2024-10-15 15:22:32,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:22:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 72 proven. 40 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-10-15 15:22:32,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:33,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:33,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148718615] [2024-10-15 15:22:33,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:33,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588482239] [2024-10-15 15:22:33,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588482239] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:33,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:33,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-15 15:22:33,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426340409] [2024-10-15 15:22:33,514 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:33,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 15:22:33,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:33,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 15:22:33,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2024-10-15 15:22:33,515 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-10-15 15:22:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:34,528 INFO L93 Difference]: Finished difference Result 183 states and 207 transitions. [2024-10-15 15:22:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-15 15:22:34,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) Word has length 120 [2024-10-15 15:22:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:34,531 INFO L225 Difference]: With dead ends: 183 [2024-10-15 15:22:34,531 INFO L226 Difference]: Without dead ends: 179 [2024-10-15 15:22:34,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 15:22:34,532 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:34,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 369 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 943 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 15:22:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-10-15 15:22:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 147. [2024-10-15 15:22:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 93 states have (on average 1.086021505376344) internal successors, (101), 96 states have internal predecessors, (101), 28 states have call successors, (28), 22 states have call predecessors, (28), 25 states have return successors, (39), 29 states have call predecessors, (39), 24 states have call successors, (39) [2024-10-15 15:22:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 168 transitions. [2024-10-15 15:22:34,574 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 168 transitions. Word has length 120 [2024-10-15 15:22:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:34,575 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 168 transitions. [2024-10-15 15:22:34,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-10-15 15:22:34,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 168 transitions. [2024-10-15 15:22:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-10-15 15:22:34,576 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:34,578 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-10-15 15:22:34,587 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 15:22:34,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:34,783 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:34,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:34,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2139308563, now seen corresponding path program 4 times [2024-10-15 15:22:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:34,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954801481] [2024-10-15 15:22:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:34,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:34,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233321200] [2024-10-15 15:22:34,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 15:22:34,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:34,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:34,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:34,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 15:22:35,066 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 15:22:35,067 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:22:35,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 227 conjuncts are in the unsatisfiable core [2024-10-15 15:22:35,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:35,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:22:35,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:22:35,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:35,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:22:35,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:22:35,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:36,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:22:36,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2024-10-15 15:22:36,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-10-15 15:22:36,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-10-15 15:22:36,415 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 [2024-10-15 15:22:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 89 proven. 103 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-10-15 15:22:36,487 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:39,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:39,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954801481] [2024-10-15 15:22:39,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:39,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233321200] [2024-10-15 15:22:39,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233321200] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:39,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:39,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-10-15 15:22:39,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452121574] [2024-10-15 15:22:39,230 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:39,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 15:22:39,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:39,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 15:22:39,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 15:22:39,231 INFO L87 Difference]: Start difference. First operand 147 states and 168 transitions. Second operand has 25 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 8 states have call successors, (15) [2024-10-15 15:22:41,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:41,151 INFO L93 Difference]: Finished difference Result 185 states and 210 transitions. [2024-10-15 15:22:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 15:22:41,152 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 8 states have call successors, (15) Word has length 144 [2024-10-15 15:22:41,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:41,153 INFO L225 Difference]: With dead ends: 185 [2024-10-15 15:22:41,153 INFO L226 Difference]: Without dead ends: 181 [2024-10-15 15:22:41,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2024-10-15 15:22:41,154 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:41,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 378 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-15 15:22:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-10-15 15:22:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 149. [2024-10-15 15:22:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 97 states have internal predecessors, (102), 28 states have call successors, (28), 22 states have call predecessors, (28), 26 states have return successors, (41), 30 states have call predecessors, (41), 24 states have call successors, (41) [2024-10-15 15:22:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 171 transitions. [2024-10-15 15:22:41,192 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 171 transitions. Word has length 144 [2024-10-15 15:22:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:41,192 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 171 transitions. [2024-10-15 15:22:41,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 8 states have call successors, (15) [2024-10-15 15:22:41,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 171 transitions. [2024-10-15 15:22:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-10-15 15:22:41,195 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:41,195 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:22:41,209 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-15 15:22:41,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:41,395 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:41,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1377710570, now seen corresponding path program 5 times [2024-10-15 15:22:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:41,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601574898] [2024-10-15 15:22:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:41,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:41,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739075592] [2024-10-15 15:22:41,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 15:22:41,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:41,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:41,482 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:41,483 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 15:22:42,096 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-10-15 15:22:42,096 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:22:42,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 259 conjuncts are in the unsatisfiable core [2024-10-15 15:22:42,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:42,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:22:42,133 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 1 [2024-10-15 15:22:42,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:42,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:22:42,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:22:42,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:43,184 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 25 treesize of output 17 [2024-10-15 15:22:43,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2024-10-15 15:22:43,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:22:43,433 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 38 treesize of output 26 [2024-10-15 15:22:43,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-10-15 15:22:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 108 proven. 83 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2024-10-15 15:22:43,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:46,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:46,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601574898] [2024-10-15 15:22:46,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:46,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739075592] [2024-10-15 15:22:46,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739075592] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:46,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:46,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-10-15 15:22:46,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861856728] [2024-10-15 15:22:46,233 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:46,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 15:22:46,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:46,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 15:22:46,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2024-10-15 15:22:46,234 INFO L87 Difference]: Start difference. First operand 149 states and 171 transitions. Second operand has 25 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 21 states have internal predecessors, (39), 11 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) [2024-10-15 15:22:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:22:47,913 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2024-10-15 15:22:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 15:22:47,914 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 21 states have internal predecessors, (39), 11 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) Word has length 168 [2024-10-15 15:22:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:22:47,915 INFO L225 Difference]: With dead ends: 187 [2024-10-15 15:22:47,915 INFO L226 Difference]: Without dead ends: 183 [2024-10-15 15:22:47,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-10-15 15:22:47,916 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 42 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:22:47,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 387 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-15 15:22:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-10-15 15:22:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 151. [2024-10-15 15:22:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 98 states have internal predecessors, (103), 28 states have call successors, (28), 22 states have call predecessors, (28), 27 states have return successors, (43), 31 states have call predecessors, (43), 24 states have call successors, (43) [2024-10-15 15:22:47,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 174 transitions. [2024-10-15 15:22:47,961 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 174 transitions. Word has length 168 [2024-10-15 15:22:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:22:47,961 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 174 transitions. [2024-10-15 15:22:47,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 21 states have internal predecessors, (39), 11 states have call successors, (16), 5 states have call predecessors, (16), 8 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) [2024-10-15 15:22:47,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:47,962 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 174 transitions. [2024-10-15 15:22:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-15 15:22:47,962 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:22:47,963 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:22:47,972 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-15 15:22:48,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-15 15:22:48,163 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:22:48,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:22:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2080657482, now seen corresponding path program 1 times [2024-10-15 15:22:48,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:22:48,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806675897] [2024-10-15 15:22:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:22:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:22:48,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274626162] [2024-10-15 15:22:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:22:48,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:22:48,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:22:48,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:22:48,217 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 15:22:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:22:48,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 226 conjuncts are in the unsatisfiable core [2024-10-15 15:22:48,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:22:48,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:22:48,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:22:48,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:22:48,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:48,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:22:48,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:22:48,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:23:01,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:24:04,940 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 42 treesize of output 26 [2024-10-15 15:24:04,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:24:06,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:24:06,360 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 113 treesize of output 66 [2024-10-15 15:24:06,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2024-10-15 15:24:06,726 INFO L349 Elim1Store]: treesize reduction 108, result has 43.2 percent of original size [2024-10-15 15:24:06,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 108 treesize of output 155 [2024-10-15 15:24:06,887 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-10-15 15:24:06,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-10-15 15:24:07,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:24:07,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 191 treesize of output 411 [2024-10-15 15:24:08,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:24:08,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 353 treesize of output 689 [2024-10-15 15:24:08,173 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 179 treesize of output 139 [2024-10-15 15:24:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 53 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-15 15:24:11,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:24:13,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:13,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806675897] [2024-10-15 15:24:13,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:24:13,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274626162] [2024-10-15 15:24:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274626162] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:24:13,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:24:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-10-15 15:24:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367556048] [2024-10-15 15:24:13,736 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:24:13,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-15 15:24:13,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-15 15:24:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1397, Unknown=4, NotChecked=0, Total=1560 [2024-10-15 15:24:13,737 INFO L87 Difference]: Start difference. First operand 151 states and 174 transitions. Second operand has 32 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 13 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) [2024-10-15 15:24:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:18,490 INFO L93 Difference]: Finished difference Result 207 states and 244 transitions. [2024-10-15 15:24:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-15 15:24:18,491 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 13 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) Word has length 83 [2024-10-15 15:24:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:18,493 INFO L225 Difference]: With dead ends: 207 [2024-10-15 15:24:18,493 INFO L226 Difference]: Without dead ends: 205 [2024-10-15 15:24:18,494 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=321, Invalid=2867, Unknown=4, NotChecked=0, Total=3192 [2024-10-15 15:24:18,494 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 125 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 84 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:24:18,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 274 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1079 Invalid, 3 Unknown, 0 Unchecked, 2.3s Time] [2024-10-15 15:24:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-10-15 15:24:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 190. [2024-10-15 15:24:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 120 states have (on average 1.1) internal successors, (132), 125 states have internal predecessors, (132), 35 states have call successors, (35), 27 states have call predecessors, (35), 34 states have return successors, (59), 38 states have call predecessors, (59), 31 states have call successors, (59) [2024-10-15 15:24:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2024-10-15 15:24:18,584 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 83 [2024-10-15 15:24:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:18,584 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2024-10-15 15:24:18,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 13 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) [2024-10-15 15:24:18,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:18,585 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2024-10-15 15:24:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-10-15 15:24:18,586 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:18,587 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:24:18,598 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-15 15:24:18,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 15:24:18,787 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:18,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:18,788 INFO L85 PathProgramCache]: Analyzing trace with hash -986625217, now seen corresponding path program 1 times [2024-10-15 15:24:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:18,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661393950] [2024-10-15 15:24:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:19,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:24:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:19,537 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:24:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:19,554 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:24:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:19,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:24:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:19,858 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:24:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:19,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:24:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:19,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-15 15:24:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:20,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:24:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:20,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:24:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:20,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:24:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:20,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-15 15:24:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:20,077 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-10-15 15:24:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:20,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-15 15:24:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-10-15 15:24:20,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661393950] [2024-10-15 15:24:20,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661393950] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:24:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175402136] [2024-10-15 15:24:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:20,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:20,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:24:20,086 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:24:20,087 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 15:24:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:20,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-15 15:24:20,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:24:20,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:24:20,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-10-15 15:24:20,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:24:20,843 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 111 treesize of output 64 [2024-10-15 15:24:20,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-10-15 15:24:20,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:24:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 109 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-15 15:24:20,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:24:21,418 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 [2024-10-15 15:24:23,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175402136] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:24:23,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:24:23,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2024-10-15 15:24:23,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181426951] [2024-10-15 15:24:23,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:24:23,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 15:24:23,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:23,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 15:24:23,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 15:24:23,626 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 25 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2024-10-15 15:24:27,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:32,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:36,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:40,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:44,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:48,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:24:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:49,032 INFO L93 Difference]: Finished difference Result 244 states and 291 transitions. [2024-10-15 15:24:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 15:24:49,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) Word has length 89 [2024-10-15 15:24:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:49,035 INFO L225 Difference]: With dead ends: 244 [2024-10-15 15:24:49,035 INFO L226 Difference]: Without dead ends: 191 [2024-10-15 15:24:49,036 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2024-10-15 15:24:49,036 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 50 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:24:49,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 219 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 796 Invalid, 6 Unknown, 0 Unchecked, 25.0s Time] [2024-10-15 15:24:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-10-15 15:24:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2024-10-15 15:24:49,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 120 states have (on average 1.0833333333333333) internal successors, (130), 124 states have internal predecessors, (130), 34 states have call successors, (34), 27 states have call predecessors, (34), 34 states have return successors, (55), 37 states have call predecessors, (55), 30 states have call successors, (55) [2024-10-15 15:24:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 219 transitions. [2024-10-15 15:24:49,132 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 219 transitions. Word has length 89 [2024-10-15 15:24:49,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:49,132 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 219 transitions. [2024-10-15 15:24:49,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2024-10-15 15:24:49,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 219 transitions. [2024-10-15 15:24:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-10-15 15:24:49,134 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:49,134 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:24:49,148 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-15 15:24:49,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-15 15:24:49,335 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:49,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1356764415, now seen corresponding path program 6 times [2024-10-15 15:24:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:49,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054317785] [2024-10-15 15:24:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:49,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:24:49,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98589535] [2024-10-15 15:24:49,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 15:24:49,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:49,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:24:49,426 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:24:49,427 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 15:24:50,168 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-10-15 15:24:50,168 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:24:50,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 235 conjuncts are in the unsatisfiable core [2024-10-15 15:24:50,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:24:50,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:24:50,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-10-15 15:24:50,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:24:50,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-15 15:24:52,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:24:52,132 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 31 treesize of output 19 [2024-10-15 15:24:52,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:24:52,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:24:52,540 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 37 treesize of output 29 [2024-10-15 15:24:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 84 proven. 183 refuted. 0 times theorem prover too weak. 947 trivial. 0 not checked. [2024-10-15 15:24:52,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:24:58,991 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 20 treesize of output 16 [2024-10-15 15:24:58,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-15 15:26:16,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:26:16,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054317785] [2024-10-15 15:26:16,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:26:16,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98589535] [2024-10-15 15:26:16,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98589535] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:26:16,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:26:16,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-10-15 15:26:16,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501584651] [2024-10-15 15:26:16,732 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:26:16,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 15:26:16,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:26:16,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 15:26:16,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1118, Unknown=19, NotChecked=0, Total=1260 [2024-10-15 15:26:16,733 INFO L87 Difference]: Start difference. First operand 189 states and 219 transitions. Second operand has 26 states, 20 states have (on average 2.2) internal successors, (44), 22 states have internal predecessors, (44), 12 states have call successors, (19), 6 states have call predecessors, (19), 11 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2024-10-15 15:26:20,829 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]