./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-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_cohendiv-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 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --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 15:18:56,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:18:56,477 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:18:56,484 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:18:56,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:18:56,504 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:18:56,505 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:18:56,505 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:18:56,506 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:18:56,506 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:18:56,506 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:18:56,506 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:18:56,507 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:18:56,507 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:18:56,508 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:18:56,508 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:18:56,509 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:18:56,509 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:18:56,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:18:56,509 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:18:56,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:18:56,510 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:18:56,510 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:18:56,511 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:18:56,511 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:18:56,511 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:18:56,511 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:18:56,511 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:18:56,512 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:18:56,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:18:56,512 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:18:56,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:18:56,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:18:56,513 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:18:56,516 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:18:56,516 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:18:56,517 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:18:56,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:18:56,517 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:18:56,517 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:18:56,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:18:56,518 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:18:56,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:18:56,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:18:56,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:18:56,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:18:56,783 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:18:56,784 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:18:56,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-10-15 15:18:58,284 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:18:58,472 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:18:58,473 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-10-15 15:18:58,480 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/745fc4b2b/d30eb7ae76c243099fa9156b323f7a95/FLAG99abc2b08 [2024-10-15 15:18:58,492 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/745fc4b2b/d30eb7ae76c243099fa9156b323f7a95 [2024-10-15 15:18:58,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:18:58,496 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:18:58,497 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:18:58,497 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:18:58,502 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:18:58,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@545ff928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58, skipping insertion in model container [2024-10-15 15:18:58,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,527 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:18:58,719 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_cohendiv-ll.c[1136,1149] [2024-10-15 15:18:58,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:18:58,748 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:18:58,757 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_cohendiv-ll.c[1136,1149] [2024-10-15 15:18:58,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:18:58,790 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:18:58,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58 WrapperNode [2024-10-15 15:18:58,791 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:18:58,791 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:18:58,792 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:18:58,792 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:18:58,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,815 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:18:58,815 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:18:58,816 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:18:58,816 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:18:58,816 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:18:58,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,833 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,851 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 5, 10, 8, 6, 8, 10]. 20 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, 1, 2, 3, 2, 3, 1]. [2024-10-15 15:18:58,852 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,852 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,860 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,862 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,864 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,869 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:18:58,870 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:18:58,870 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:18:58,870 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:18:58,871 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (1/1) ... [2024-10-15 15:18:58,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:18:58,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:58,908 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 15:18:58,910 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 15:18:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:18:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 15:18:58,956 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 15:18:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:18:58,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:18:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:18:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:18:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-15 15:18:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-15 15:18:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-15 15:18:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-15 15:18:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-15 15:18:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 15:18:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2024-10-15 15:18:58,959 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2024-10-15 15:18:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2024-10-15 15:18:58,959 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2024-10-15 15:18:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 15:18:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 15:18:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-15 15:18:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-15 15:18:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-15 15:18:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-15 15:18:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-15 15:18:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:18:58,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:18:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:18:58,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:18:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 15:18:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 15:18:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-15 15:18:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-15 15:18:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-15 15:18:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-15 15:18:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-15 15:18:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 15:18:58,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 15:18:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 15:18:59,092 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:18:59,094 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:18:59,404 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-10-15 15:18:59,404 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:18:59,425 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:18:59,428 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-15 15:18:59,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:18:59 BoogieIcfgContainer [2024-10-15 15:18:59,429 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:18:59,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:18:59,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:18:59,435 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:18:59,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:18:58" (1/3) ... [2024-10-15 15:18:59,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3783e05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:18:59, skipping insertion in model container [2024-10-15 15:18:59,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:18:58" (2/3) ... [2024-10-15 15:18:59,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3783e05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:18:59, skipping insertion in model container [2024-10-15 15:18:59,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:18:59" (3/3) ... [2024-10-15 15:18:59,439 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2024-10-15 15:18:59,454 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:18:59,454 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:18:59,517 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:18:59,525 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;@419688f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:18:59,526 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:18:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 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 15:18:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-15 15:18:59,537 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:18:59,538 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 15:18:59,538 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:18:59,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:18:59,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1731301129, now seen corresponding path program 1 times [2024-10-15 15:18:59,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:18:59,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986956599] [2024-10-15 15:18:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:18:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:18:59,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43528038] [2024-10-15 15:18:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:18:59,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:18:59,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:18:59,763 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 15:18:59,764 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 15:18:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:18:59,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-15 15:18:59,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:00,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:00,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:19:00,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:19:00,160 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 7 treesize of output 3 [2024-10-15 15:19:00,222 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 15:19:00,224 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:19:00,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:00,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986956599] [2024-10-15 15:19:00,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:00,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43528038] [2024-10-15 15:19:00,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43528038] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:19:00,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:19:00,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:19:00,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549898553] [2024-10-15 15:19:00,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:00,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:19:00,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:00,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:19:00,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:19:00,267 INFO L87 Difference]: Start difference. First operand has 50 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 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 15:19:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:00,522 INFO L93 Difference]: Finished difference Result 108 states and 152 transitions. [2024-10-15 15:19:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:19:00,527 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 15:19:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:00,539 INFO L225 Difference]: With dead ends: 108 [2024-10-15 15:19:00,539 INFO L226 Difference]: Without dead ends: 61 [2024-10-15 15:19:00,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 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 15:19:00,549 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 15 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:00,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 310 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:19:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-15 15:19:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-10-15 15:19:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2024-10-15 15:19:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-10-15 15:19:00,615 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 18 [2024-10-15 15:19:00,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:00,617 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-10-15 15:19:00,618 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 15:19:00,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:00,620 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-10-15 15:19:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-15 15:19:00,621 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:00,621 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 15:19:00,639 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 15:19:00,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-15 15:19:00,823 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:00,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:00,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1578239580, now seen corresponding path program 1 times [2024-10-15 15:19:00,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:00,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670357671] [2024-10-15 15:19:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:00,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132295968] [2024-10-15 15:19:00,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:00,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:00,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:00,910 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 15:19:00,911 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 15:19:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:01,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-15 15:19:01,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:01,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:01,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:19:01,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:01,196 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 15:19:01,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:19:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:19:01,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:01,384 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 15:19:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:01,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670357671] [2024-10-15 15:19:01,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:01,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132295968] [2024-10-15 15:19:01,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132295968] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:01,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:19:01,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-10-15 15:19:01,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945864872] [2024-10-15 15:19:01,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:01,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:19:01,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:01,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:19:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-15 15:19:01,391 INFO L87 Difference]: Start difference. First operand 59 states and 70 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 15:19:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:01,598 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-10-15 15:19:01,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:19:01,601 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 15:19:01,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:01,603 INFO L225 Difference]: With dead ends: 68 [2024-10-15 15:19:01,603 INFO L226 Difference]: Without dead ends: 66 [2024-10-15 15:19:01,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-15 15:19:01,606 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:01,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 294 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:19:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-15 15:19:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-10-15 15:19:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2024-10-15 15:19:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-10-15 15:19:01,630 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 24 [2024-10-15 15:19:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:01,632 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-10-15 15:19:01,632 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 15:19:01,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-10-15 15:19:01,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-15 15:19:01,634 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:01,634 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, 1, 1, 1, 1] [2024-10-15 15:19:01,651 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 15:19:01,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:01,835 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:01,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1582649267, now seen corresponding path program 1 times [2024-10-15 15:19:01,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:01,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739913755] [2024-10-15 15:19:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:01,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:01,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738538315] [2024-10-15 15:19:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:01,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:01,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:01,915 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 15:19:01,917 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 15:19:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:02,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-15 15:19:02,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:02,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:02,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:02,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:02,111 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 15:19:02,115 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 15:19:02,146 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 15:19:02,147 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:19:02,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:02,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739913755] [2024-10-15 15:19:02,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:02,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738538315] [2024-10-15 15:19:02,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738538315] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:19:02,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:19:02,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:19:02,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489617993] [2024-10-15 15:19:02,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:02,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:19:02,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:02,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:19:02,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:19:02,150 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-15 15:19:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:02,354 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2024-10-15 15:19:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:19:02,354 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-10-15 15:19:02,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:02,357 INFO L225 Difference]: With dead ends: 84 [2024-10-15 15:19:02,360 INFO L226 Difference]: Without dead ends: 82 [2024-10-15 15:19:02,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 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 15:19:02,361 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:02,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 266 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:19:02,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-15 15:19:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2024-10-15 15:19:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 51 states have internal predecessors, (53), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-10-15 15:19:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2024-10-15 15:19:02,385 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 34 [2024-10-15 15:19:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:02,388 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2024-10-15 15:19:02,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-15 15:19:02,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2024-10-15 15:19:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-15 15:19:02,389 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:02,389 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, 1, 1, 1, 1] [2024-10-15 15:19:02,408 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-15 15:19:02,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-15 15:19:02,591 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:02,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash -372589770, now seen corresponding path program 1 times [2024-10-15 15:19:02,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:02,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63991781] [2024-10-15 15:19:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:02,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:02,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726665495] [2024-10-15 15:19:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:02,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:02,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:02,652 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 15:19:02,655 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 15:19:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:02,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-15 15:19:02,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:02,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:02,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:02,803 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 15:19:02,881 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 15:19:02,885 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 15:19:02,914 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 15:19:02,915 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:19:02,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:02,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63991781] [2024-10-15 15:19:02,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:02,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726665495] [2024-10-15 15:19:02,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726665495] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:19:02,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:19:02,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-15 15:19:02,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491191017] [2024-10-15 15:19:02,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:02,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 15:19:02,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 15:19:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-15 15:19:02,918 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-15 15:19:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:03,128 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2024-10-15 15:19:03,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-15 15:19:03,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-10-15 15:19:03,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:03,130 INFO L225 Difference]: With dead ends: 88 [2024-10-15 15:19:03,130 INFO L226 Difference]: Without dead ends: 78 [2024-10-15 15:19:03,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-15 15:19:03,132 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:03,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:19:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-15 15:19:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-10-15 15:19:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-10-15 15:19:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2024-10-15 15:19:03,152 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 34 [2024-10-15 15:19:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:03,152 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2024-10-15 15:19:03,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-15 15:19:03,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:03,153 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2024-10-15 15:19:03,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-15 15:19:03,154 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:03,154 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] [2024-10-15 15:19:03,171 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 15:19:03,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:03,355 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:03,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash 316523269, now seen corresponding path program 1 times [2024-10-15 15:19:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:03,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110697046] [2024-10-15 15:19:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:03,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077591502] [2024-10-15 15:19:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:03,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:03,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:03,415 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 15:19:03,416 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 15:19:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:03,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-10-15 15:19:03,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:03,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:03,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:03,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:03,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:03,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-15 15:19:03,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:19:03,882 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 15:19:03,916 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 15:19:03,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:04,153 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 15:19:04,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:04,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110697046] [2024-10-15 15:19:04,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:04,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077591502] [2024-10-15 15:19:04,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077591502] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:04,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:19:04,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2024-10-15 15:19:04,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668790004] [2024-10-15 15:19:04,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:04,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-15 15:19:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-15 15:19:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-10-15 15:19:04,155 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-15 15:19:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:04,553 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2024-10-15 15:19:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-15 15:19:04,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2024-10-15 15:19:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:04,555 INFO L225 Difference]: With dead ends: 111 [2024-10-15 15:19:04,556 INFO L226 Difference]: Without dead ends: 109 [2024-10-15 15:19:04,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-10-15 15:19:04,558 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:04,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 271 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:19:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-15 15:19:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2024-10-15 15:19:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2024-10-15 15:19:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2024-10-15 15:19:04,596 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 40 [2024-10-15 15:19:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:04,597 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2024-10-15 15:19:04,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-15 15:19:04,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2024-10-15 15:19:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-15 15:19:04,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:04,599 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] [2024-10-15 15:19:04,616 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 15:19:04,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:04,800 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:04,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash -889408325, now seen corresponding path program 1 times [2024-10-15 15:19:04,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:04,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901733176] [2024-10-15 15:19:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:04,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:05,799 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:19:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:05,804 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:19:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:05,851 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:19:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:05,856 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 15:19:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:05,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-15 15:19:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:05,865 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-15 15:19:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 15:19:05,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:05,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901733176] [2024-10-15 15:19:05,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901733176] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:19:05,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:19:05,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-10-15 15:19:05,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398135240] [2024-10-15 15:19:05,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:05,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-15 15:19:05,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-15 15:19:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2024-10-15 15:19:05,877 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:19:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:06,234 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2024-10-15 15:19:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-15 15:19:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-10-15 15:19:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:06,236 INFO L225 Difference]: With dead ends: 114 [2024-10-15 15:19:06,236 INFO L226 Difference]: Without dead ends: 112 [2024-10-15 15:19:06,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-10-15 15:19:06,237 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:06,237 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 367 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:19:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-15 15:19:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-10-15 15:19:06,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2024-10-15 15:19:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2024-10-15 15:19:06,268 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 46 [2024-10-15 15:19:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:06,268 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2024-10-15 15:19:06,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:19:06,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2024-10-15 15:19:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-15 15:19:06,272 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:06,272 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] [2024-10-15 15:19:06,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-15 15:19:06,273 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:06,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1594102023, now seen corresponding path program 1 times [2024-10-15 15:19:06,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:06,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319709895] [2024-10-15 15:19:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:06,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:06,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234733846] [2024-10-15 15:19:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:06,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:06,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:06,330 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 15:19:06,332 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 15:19:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:06,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-10-15 15:19:06,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:06,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:06,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:06,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:07,020 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 15:19:07,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-10-15 15:19:07,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-10-15 15:19:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:19:07,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:07,222 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 31 treesize of output 23 [2024-10-15 15:19:11,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:11,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319709895] [2024-10-15 15:19:11,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:11,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234733846] [2024-10-15 15:19:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234733846] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:11,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:19:11,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-15 15:19:11,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064993729] [2024-10-15 15:19:11,297 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:19:11,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-15 15:19:11,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-15 15:19:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=327, Unknown=1, NotChecked=0, Total=380 [2024-10-15 15:19:11,299 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-15 15:19:15,316 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 15:19:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:16,142 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2024-10-15 15:19:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 15:19:16,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2024-10-15 15:19:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:16,145 INFO L225 Difference]: With dead ends: 151 [2024-10-15 15:19:16,145 INFO L226 Difference]: Without dead ends: 149 [2024-10-15 15:19:16,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=129, Invalid=800, Unknown=1, NotChecked=0, Total=930 [2024-10-15 15:19:16,146 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 72 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:16,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 306 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 568 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-10-15 15:19:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-10-15 15:19:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2024-10-15 15:19:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 96 states have internal predecessors, (98), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (38), 30 states have call predecessors, (38), 31 states have call successors, (38) [2024-10-15 15:19:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2024-10-15 15:19:16,192 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 53 [2024-10-15 15:19:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:16,192 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2024-10-15 15:19:16,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 7 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-15 15:19:16,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2024-10-15 15:19:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-15 15:19:16,194 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:16,194 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 15:19:16,213 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 15:19:16,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:16,395 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:16,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:16,395 INFO L85 PathProgramCache]: Analyzing trace with hash -161335246, now seen corresponding path program 1 times [2024-10-15 15:19:16,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:16,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745459075] [2024-10-15 15:19:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:16,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:16,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80062282] [2024-10-15 15:19:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:16,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:16,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:16,440 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 15:19:16,442 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 15:19:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:16,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-15 15:19:16,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:16,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:16,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:16,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:16,623 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 15:19:16,704 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 15:19:16,707 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 15:19:16,734 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 15:19:16,734 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:19:16,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:16,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745459075] [2024-10-15 15:19:16,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:16,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80062282] [2024-10-15 15:19:16,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80062282] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:19:16,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:19:16,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:19:16,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401741960] [2024-10-15 15:19:16,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:19:16,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:19:16,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:16,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:19:16,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:19:16,736 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-15 15:19:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:17,094 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2024-10-15 15:19:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-15 15:19:17,095 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), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 59 [2024-10-15 15:19:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:17,099 INFO L225 Difference]: With dead ends: 162 [2024-10-15 15:19:17,099 INFO L226 Difference]: Without dead ends: 160 [2024-10-15 15:19:17,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-10-15 15:19:17,102 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:17,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 141 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:19:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-15 15:19:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2024-10-15 15:19:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 104 states have internal predecessors, (105), 36 states have call successors, (36), 21 states have call predecessors, (36), 24 states have return successors, (47), 33 states have call predecessors, (47), 33 states have call successors, (47) [2024-10-15 15:19:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2024-10-15 15:19:17,146 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 59 [2024-10-15 15:19:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:17,146 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2024-10-15 15:19:17,146 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), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-15 15:19:17,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2024-10-15 15:19:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-15 15:19:17,149 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:17,150 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 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 15:19:17,168 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 15:19:17,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:17,351 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:17,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:17,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1396822734, now seen corresponding path program 1 times [2024-10-15 15:19:17,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:17,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023261560] [2024-10-15 15:19:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:17,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:17,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256845826] [2024-10-15 15:19:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:17,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:17,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:17,387 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 15:19:17,388 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 15:19:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:17,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-10-15 15:19:17,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:17,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:17,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:17,746 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 23 treesize of output 15 [2024-10-15 15:19:17,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:18,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-10-15 15:19:18,217 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 15:19:18,291 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 15:19:18,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-10-15 15:19:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 15:19:18,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-10-15 15:19:18,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:18,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023261560] [2024-10-15 15:19:18,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:18,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256845826] [2024-10-15 15:19:18,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256845826] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:19:18,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:19:18,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 23 [2024-10-15 15:19:18,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649131308] [2024-10-15 15:19:18,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:19:18,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 15:19:18,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:18,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 15:19:18,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2024-10-15 15:19:18,570 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand has 23 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-15 15:19:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:19,764 INFO L93 Difference]: Finished difference Result 222 states and 261 transitions. [2024-10-15 15:19:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-15 15:19:19,769 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 62 [2024-10-15 15:19:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:19,771 INFO L225 Difference]: With dead ends: 222 [2024-10-15 15:19:19,771 INFO L226 Difference]: Without dead ends: 220 [2024-10-15 15:19:19,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 15:19:19,772 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 70 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:19,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 516 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-15 15:19:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-10-15 15:19:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 214. [2024-10-15 15:19:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 134 states have (on average 1.0820895522388059) internal successors, (145), 141 states have internal predecessors, (145), 44 states have call successors, (44), 29 states have call predecessors, (44), 35 states have return successors, (62), 44 states have call predecessors, (62), 40 states have call successors, (62) [2024-10-15 15:19:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 251 transitions. [2024-10-15 15:19:19,840 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 251 transitions. Word has length 62 [2024-10-15 15:19:19,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:19,840 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 251 transitions. [2024-10-15 15:19:19,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 11 states have call successors, (24), 8 states have call predecessors, (24), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-10-15 15:19:19,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 251 transitions. [2024-10-15 15:19:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-15 15:19:19,843 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:19,844 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:19,860 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-15 15:19:20,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:20,048 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:20,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:20,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1851795615, now seen corresponding path program 2 times [2024-10-15 15:19:20,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:20,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331799258] [2024-10-15 15:19:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:20,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:20,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370843222] [2024-10-15 15:19:20,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:19:20,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:20,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:20,091 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 15:19:20,093 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 15:19:20,240 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:19:20,240 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:19:20,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-10-15 15:19:20,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:20,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:20,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:20,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:20,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:20,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:20,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:20,543 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 15:19:21,377 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-10-15 15:19:21,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 80 [2024-10-15 15:19:21,452 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 44 treesize of output 32 [2024-10-15 15:19:21,480 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-10-15 15:19:21,481 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 15:19:23,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:23,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 155 [2024-10-15 15:19:23,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:23,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 206 [2024-10-15 15:19:23,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:23,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 169 [2024-10-15 15:19:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:19:23,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:28,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:28,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331799258] [2024-10-15 15:19:28,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:28,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370843222] [2024-10-15 15:19:28,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370843222] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:28,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:19:28,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-10-15 15:19:28,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881190373] [2024-10-15 15:19:28,794 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:19:28,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 15:19:28,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:28,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 15:19:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 15:19:28,795 INFO L87 Difference]: Start difference. First operand 214 states and 251 transitions. Second operand has 24 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-15 15:19:35,928 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 15:19:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:19:36,453 INFO L93 Difference]: Finished difference Result 296 states and 334 transitions. [2024-10-15 15:19:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-15 15:19:36,453 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 65 [2024-10-15 15:19:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:19:36,456 INFO L225 Difference]: With dead ends: 296 [2024-10-15 15:19:36,456 INFO L226 Difference]: Without dead ends: 292 [2024-10-15 15:19:36,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2024-10-15 15:19:36,458 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 65 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-10-15 15:19:36,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 410 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 940 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2024-10-15 15:19:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-10-15 15:19:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2024-10-15 15:19:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 182 states have (on average 1.0824175824175823) internal successors, (197), 191 states have internal predecessors, (197), 54 states have call successors, (54), 42 states have call predecessors, (54), 48 states have return successors, (74), 52 states have call predecessors, (74), 50 states have call successors, (74) [2024-10-15 15:19:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 325 transitions. [2024-10-15 15:19:36,574 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 325 transitions. Word has length 65 [2024-10-15 15:19:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:19:36,575 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 325 transitions. [2024-10-15 15:19:36,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-15 15:19:36,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 325 transitions. [2024-10-15 15:19:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-15 15:19:36,580 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:19:36,580 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:19:36,600 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 15:19:36,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-15 15:19:36,781 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:19:36,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:19:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1323270614, now seen corresponding path program 1 times [2024-10-15 15:19:36,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:19:36,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133864789] [2024-10-15 15:19:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:36,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:19:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:19:36,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312241012] [2024-10-15 15:19:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:19:36,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:19:36,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:19:36,831 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 15:19:36,832 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 15:19:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:19:37,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-10-15 15:19:37,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:19:37,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:37,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:37,028 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 15:19:37,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 15:19:37,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:19:37,060 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 15:19:37,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:19:37,880 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 15:19:37,979 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 15:19:50,490 INFO L349 Elim1Store]: treesize reduction 20, result has 58.3 percent of original size [2024-10-15 15:19:50,490 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 73 treesize of output 65 [2024-10-15 15:19:50,558 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 36 treesize of output 13 [2024-10-15 15:19:50,683 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 15:19:50,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:50,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2024-10-15 15:19:50,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:19:50,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 124 [2024-10-15 15:19:50,737 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 92 treesize of output 64 [2024-10-15 15:19:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-15 15:19:50,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:19:52,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:19:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133864789] [2024-10-15 15:19:52,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:19:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312241012] [2024-10-15 15:19:52,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312241012] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:19:52,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:19:52,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-10-15 15:19:52,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564212966] [2024-10-15 15:19:52,340 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:19:52,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-15 15:19:52,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:19:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-15 15:19:52,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=836, Unknown=3, NotChecked=0, Total=930 [2024-10-15 15:19:52,341 INFO L87 Difference]: Start difference. First operand 285 states and 325 transitions. Second operand has 28 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-15 15:19:56,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:00,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:04,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:08,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:12,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:16,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:20,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:24,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:29,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:33,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:38,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:42,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:46,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:47,250 INFO L93 Difference]: Finished difference Result 368 states and 423 transitions. [2024-10-15 15:20:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-15 15:20:47,251 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 77 [2024-10-15 15:20:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:47,255 INFO L225 Difference]: With dead ends: 368 [2024-10-15 15:20:47,255 INFO L226 Difference]: Without dead ends: 358 [2024-10-15 15:20:47,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=402, Invalid=3253, Unknown=5, NotChecked=0, Total=3660 [2024-10-15 15:20:47,257 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 81 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 66 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:47,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 191 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1692 Invalid, 31 Unknown, 0 Unchecked, 53.5s Time] [2024-10-15 15:20:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-10-15 15:20:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 353. [2024-10-15 15:20:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 225 states have (on average 1.0844444444444445) internal successors, (244), 237 states have internal predecessors, (244), 67 states have call successors, (67), 51 states have call predecessors, (67), 60 states have return successors, (96), 64 states have call predecessors, (96), 63 states have call successors, (96) [2024-10-15 15:20:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 407 transitions. [2024-10-15 15:20:47,408 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 407 transitions. Word has length 77 [2024-10-15 15:20:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:47,409 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 407 transitions. [2024-10-15 15:20:47,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 10 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-10-15 15:20:47,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 407 transitions. [2024-10-15 15:20:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-15 15:20:47,410 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:47,410 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 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] [2024-10-15 15:20:47,429 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 15:20:47,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-15 15:20:47,615 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:47,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1223510810, now seen corresponding path program 2 times [2024-10-15 15:20:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010028812] [2024-10-15 15:20:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:47,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610401416] [2024-10-15 15:20:47,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:20:47,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:47,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:47,668 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 15:20:47,669 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 15:20:47,827 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:20:47,827 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:20:47,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-10-15 15:20:47,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:47,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:47,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:20:47,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:47,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:20:47,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:20:48,337 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 15:20:48,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2024-10-15 15:20:48,753 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 15:20:48,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-10-15 15:20:48,796 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 15:20:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 56 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-15 15:20:48,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:20:49,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:49,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010028812] [2024-10-15 15:20:49,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:20:49,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610401416] [2024-10-15 15:20:49,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610401416] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:20:49,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:20:49,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-15 15:20:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031665117] [2024-10-15 15:20:49,044 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:20:49,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-15 15:20:49,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:49,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-15 15:20:49,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2024-10-15 15:20:49,045 INFO L87 Difference]: Start difference. First operand 353 states and 407 transitions. Second operand has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (16), 8 states have call predecessors, (16), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-15 15:20:53,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:20:54,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:54,350 INFO L93 Difference]: Finished difference Result 506 states and 592 transitions. [2024-10-15 15:20:54,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-15 15:20:54,350 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (16), 8 states have call predecessors, (16), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 81 [2024-10-15 15:20:54,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:54,354 INFO L225 Difference]: With dead ends: 506 [2024-10-15 15:20:54,354 INFO L226 Difference]: Without dead ends: 504 [2024-10-15 15:20:54,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 15 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 15:20:54,355 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 105 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:54,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 495 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1046 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-10-15 15:20:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2024-10-15 15:20:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 496. [2024-10-15 15:20:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 318 states have (on average 1.0849056603773586) internal successors, (345), 334 states have internal predecessors, (345), 91 states have call successors, (91), 72 states have call predecessors, (91), 86 states have return successors, (145), 89 states have call predecessors, (145), 85 states have call successors, (145) [2024-10-15 15:20:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 581 transitions. [2024-10-15 15:20:54,525 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 581 transitions. Word has length 81 [2024-10-15 15:20:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:54,526 INFO L471 AbstractCegarLoop]: Abstraction has 496 states and 581 transitions. [2024-10-15 15:20:54,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 8 states have call successors, (16), 8 states have call predecessors, (16), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-10-15 15:20:54,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 581 transitions. [2024-10-15 15:20:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-15 15:20:54,530 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:54,531 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2024-10-15 15:20:54,546 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-15 15:20:54,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:54,735 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:54,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:54,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1472240640, now seen corresponding path program 3 times [2024-10-15 15:20:54,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:54,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106856892] [2024-10-15 15:20:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:54,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:20:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,044 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:20:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:20:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-15 15:20:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-15 15:20:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,255 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:20:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,262 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-15 15:20:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-15 15:20:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-10-15 15:20:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-15 15:20:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-15 15:20:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-10-15 15:20:56,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:20:56,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106856892] [2024-10-15 15:20:56,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106856892] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:20:56,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:20:56,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-10-15 15:20:56,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565954678] [2024-10-15 15:20:56,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:20:56,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-15 15:20:56,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:20:56,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-15 15:20:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-10-15 15:20:56,287 INFO L87 Difference]: Start difference. First operand 496 states and 581 transitions. Second operand has 14 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-10-15 15:20:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:20:57,014 INFO L93 Difference]: Finished difference Result 523 states and 614 transitions. [2024-10-15 15:20:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 15:20:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 81 [2024-10-15 15:20:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:20:57,017 INFO L225 Difference]: With dead ends: 523 [2024-10-15 15:20:57,017 INFO L226 Difference]: Without dead ends: 266 [2024-10-15 15:20:57,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-10-15 15:20:57,022 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 15:20:57,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 165 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 15:20:57,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-10-15 15:20:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2024-10-15 15:20:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 171 states have (on average 1.0701754385964912) internal successors, (183), 178 states have internal predecessors, (183), 48 states have call successors, (48), 40 states have call predecessors, (48), 46 states have return successors, (63), 47 states have call predecessors, (63), 44 states have call successors, (63) [2024-10-15 15:20:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 294 transitions. [2024-10-15 15:20:57,107 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 294 transitions. Word has length 81 [2024-10-15 15:20:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:20:57,109 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 294 transitions. [2024-10-15 15:20:57,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 8 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-10-15 15:20:57,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 294 transitions. [2024-10-15 15:20:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-10-15 15:20:57,111 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:20:57,111 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:20:57,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-15 15:20:57,111 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:20:57,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:20:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash -987042471, now seen corresponding path program 1 times [2024-10-15 15:20:57,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:20:57,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626855521] [2024-10-15 15:20:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:57,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:20:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:20:57,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70315202] [2024-10-15 15:20:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:20:57,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:20:57,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:20:57,166 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 15:20:57,168 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 15:20:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:20:57,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-10-15 15:20:57,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:20:57,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:57,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:20:57,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:20:57,512 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 15:22:26,999 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 15:22:27,007 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 15:22:27,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:22:27,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 58 [2024-10-15 15:22:27,166 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 15:22:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-15 15:22:27,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:22:28,033 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 13 [2024-10-15 15:22:28,038 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 15:22:44,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:22:44,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626855521] [2024-10-15 15:22:44,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:22:44,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70315202] [2024-10-15 15:22:44,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70315202] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:22:44,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:22:44,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-10-15 15:22:44,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674512572] [2024-10-15 15:22:44,964 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:22:44,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-15 15:22:44,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:22:44,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-15 15:22:44,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=816, Unknown=14, NotChecked=0, Total=930 [2024-10-15 15:22:44,965 INFO L87 Difference]: Start difference. First operand 266 states and 294 transitions. Second operand has 24 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2024-10-15 15:22:48,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:22:53,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:22:57,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-15 15:23:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:07,238 INFO L93 Difference]: Finished difference Result 276 states and 306 transitions. [2024-10-15 15:23:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-15 15:23:07,240 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) Word has length 89 [2024-10-15 15:23:07,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:07,242 INFO L225 Difference]: With dead ends: 276 [2024-10-15 15:23:07,242 INFO L226 Difference]: Without dead ends: 274 [2024-10-15 15:23:07,243 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 59 SyntacticMatches, 17 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 115.1s TimeCoverageRelationStatistics Valid=296, Invalid=2238, Unknown=16, NotChecked=0, Total=2550 [2024-10-15 15:23:07,244 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 80 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 70 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:23:07,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 288 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1018 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2024-10-15 15:23:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-10-15 15:23:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 272. [2024-10-15 15:23:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 175 states have (on average 1.0685714285714285) internal successors, (187), 182 states have internal predecessors, (187), 48 states have call successors, (48), 41 states have call predecessors, (48), 48 states have return successors, (65), 48 states have call predecessors, (65), 44 states have call successors, (65) [2024-10-15 15:23:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 300 transitions. [2024-10-15 15:23:07,372 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 300 transitions. Word has length 89 [2024-10-15 15:23:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:07,372 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 300 transitions. [2024-10-15 15:23:07,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2024-10-15 15:23:07,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 300 transitions. [2024-10-15 15:23:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-15 15:23:07,376 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:07,376 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:07,394 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-15 15:23:07,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-15 15:23:07,580 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:07,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:07,580 INFO L85 PathProgramCache]: Analyzing trace with hash -568318842, now seen corresponding path program 2 times [2024-10-15 15:23:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:07,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552461612] [2024-10-15 15:23:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:07,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:23:07,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969929208] [2024-10-15 15:23:07,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:23:07,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:07,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:07,627 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-15 15:23:07,628 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-15 15:23:07,848 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:23:07,848 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:23:07,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-10-15 15:23:07,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:07,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:07,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:07,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:07,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:07,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:08,122 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 23 treesize of output 15 [2024-10-15 15:23:08,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:08,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:08,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:23:08,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-10-15 15:23:08,834 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 15:23:08,868 INFO L349 Elim1Store]: treesize reduction 24, result has 53.8 percent of original size [2024-10-15 15:23:08,868 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 46 treesize of output 57 [2024-10-15 15:23:08,917 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-10-15 15:23:08,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-10-15 15:23:09,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:23:09,718 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 41 treesize of output 37 [2024-10-15 15:23:09,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:23:09,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 142 [2024-10-15 15:23:09,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:23:09,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 158 [2024-10-15 15:23:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2024-10-15 15:23:09,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:23:18,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:18,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552461612] [2024-10-15 15:23:18,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:23:18,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969929208] [2024-10-15 15:23:18,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969929208] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:23:18,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:23:18,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-10-15 15:23:18,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919822937] [2024-10-15 15:23:18,671 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:23:18,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 15:23:18,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:18,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 15:23:18,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=836, Unknown=2, NotChecked=0, Total=930 [2024-10-15 15:23:18,672 INFO L87 Difference]: Start difference. First operand 272 states and 300 transitions. Second operand has 23 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 10 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-10-15 15:23:23,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]