./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-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 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:33:54,112 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:33:54,183 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:33:54,190 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:33:54,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:33:54,220 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:33:54,221 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:33:54,222 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:33:54,222 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:33:54,223 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:33:54,224 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:33:54,224 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:33:54,225 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:33:54,225 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:33:54,225 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:33:54,226 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:33:54,226 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:33:54,229 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:33:54,229 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:33:54,229 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:33:54,229 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:33:54,233 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:33:54,233 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:33:54,234 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:33:54,234 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:33:54,234 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:33:54,234 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:33:54,234 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:33:54,235 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:33:54,235 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:33:54,235 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:33:54,236 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:33:54,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:33:54,236 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:33:54,237 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:33:54,238 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:33:54,238 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:33:54,238 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:33:54,239 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:33:54,239 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:33:54,239 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:33:54,241 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:33:54,241 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:33:54,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:33:54,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:33:54,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:33:54,526 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:33:54,527 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:33:54,528 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-11 20:33:55,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:33:56,101 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:33:56,102 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-11 20:33:56,109 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/573f6014f/4e40129bfb1749ecaea31f2f67c0c500/FLAG34cb1f86b [2024-09-11 20:33:56,496 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/573f6014f/4e40129bfb1749ecaea31f2f67c0c500 [2024-09-11 20:33:56,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:33:56,500 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:33:56,501 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:33:56,501 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:33:56,508 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:33:56,509 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,510 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347ff57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56, skipping insertion in model container [2024-09-11 20:33:56,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,533 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:33:56,691 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-09-11 20:33:56,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:33:56,730 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:33:56,741 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-09-11 20:33:56,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:33:56,779 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:33:56,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56 WrapperNode [2024-09-11 20:33:56,779 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:33:56,780 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:33:56,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:33:56,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:33:56,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,794 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,817 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 106 [2024-09-11 20:33:56,819 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:33:56,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:33:56,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:33:56,820 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:33:56,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,832 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,865 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 21, 12, 5, 11, 15]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 2, 2, 1, 2, 2]. [2024-09-11 20:33:56,865 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,866 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,877 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,880 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,887 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:33:56,896 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:33:56,896 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:33:56,896 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:33:56,897 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (1/1) ... [2024-09-11 20:33:56,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:33:56,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:33:56,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-11 20:33:56,937 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-11 20:33:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:33:56,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:33:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:33:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-11 20:33:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-11 20:33:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-11 20:33:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-11 20:33:56,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-11 20:33:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 20:33:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 20:33:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-11 20:33:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-11 20:33:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-11 20:33:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-11 20:33:56,978 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2024-09-11 20:33:56,978 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2024-09-11 20:33:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:33:56,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:33:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:33:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:33:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-11 20:33:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-11 20:33:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-11 20:33:56,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-11 20:33:56,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:33:56,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:33:56,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:33:57,070 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:33:57,072 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:33:57,306 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-11 20:33:57,307 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:33:57,347 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:33:57,347 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-11 20:33:57,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:33:57 BoogieIcfgContainer [2024-09-11 20:33:57,348 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:33:57,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:33:57,351 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:33:57,354 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:33:57,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:33:56" (1/3) ... [2024-09-11 20:33:57,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c1fd03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:33:57, skipping insertion in model container [2024-09-11 20:33:57,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:33:56" (2/3) ... [2024-09-11 20:33:57,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c1fd03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:33:57, skipping insertion in model container [2024-09-11 20:33:57,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:33:57" (3/3) ... [2024-09-11 20:33:57,356 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2024-09-11 20:33:57,368 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:33:57,369 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:33:57,416 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:33:57,421 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@76843f18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:33:57,422 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:33:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-11 20:33:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 20:33:57,431 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:33:57,431 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:33:57,432 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:33:57,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:57,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1371458259, now seen corresponding path program 1 times [2024-09-11 20:33:57,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:33:57,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985893071] [2024-09-11 20:33:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:57,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:33:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:33:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:33:58,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:33:58,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985893071] [2024-09-11 20:33:58,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985893071] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:33:58,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:33:58,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-11 20:33:58,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011896953] [2024-09-11 20:33:58,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:33:58,381 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:33:58,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:33:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:33:58,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:33:58,407 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 20:33:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:33:58,709 INFO L93 Difference]: Finished difference Result 94 states and 144 transitions. [2024-09-11 20:33:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:33:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 20:33:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:33:58,719 INFO L225 Difference]: With dead ends: 94 [2024-09-11 20:33:58,719 INFO L226 Difference]: Without dead ends: 56 [2024-09-11 20:33:58,722 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:33:58,725 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:33:58,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 192 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:33:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-11 20:33:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-09-11 20:33:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-09-11 20:33:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2024-09-11 20:33:58,785 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 8 [2024-09-11 20:33:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:33:58,787 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2024-09-11 20:33:58,788 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 20:33:58,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2024-09-11 20:33:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-11 20:33:58,790 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:33:58,790 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:33:58,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:33:58,791 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:33:58,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:58,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1638005840, now seen corresponding path program 1 times [2024-09-11 20:33:58,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:33:58,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268458367] [2024-09-11 20:33:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:58,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:33:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:33:58,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697163927] [2024-09-11 20:33:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:58,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:33:58,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:33:58,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:33:58,826 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 20:33:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:33:58,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-11 20:33:58,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:33:58,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:33:58,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:33:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:33:59,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:33:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:33:59,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:33:59,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268458367] [2024-09-11 20:33:59,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:33:59,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697163927] [2024-09-11 20:33:59,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697163927] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 20:33:59,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:33:59,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2024-09-11 20:33:59,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781511102] [2024-09-11 20:33:59,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:33:59,373 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:33:59,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:33:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:33:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:33:59,375 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:33:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:33:59,610 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-09-11 20:33:59,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:33:59,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-11 20:33:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:33:59,612 INFO L225 Difference]: With dead ends: 62 [2024-09-11 20:33:59,612 INFO L226 Difference]: Without dead ends: 60 [2024-09-11 20:33:59,613 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-11 20:33:59,613 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:33:59,614 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 204 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:33:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-11 20:33:59,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-11 20:33:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-09-11 20:33:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2024-09-11 20:33:59,638 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 14 [2024-09-11 20:33:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:33:59,639 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2024-09-11 20:33:59,639 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:33:59,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2024-09-11 20:33:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-11 20:33:59,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:33:59,640 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:33:59,661 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 20:33:59,840 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:33:59,841 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:33:59,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1652518129, now seen corresponding path program 1 times [2024-09-11 20:33:59,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:33:59,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308577477] [2024-09-11 20:33:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:59,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:33:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:33:59,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392865592] [2024-09-11 20:33:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:59,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:33:59,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:33:59,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:33:59,880 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 20:33:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:33:59,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-11 20:33:59,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:33:59,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:33:59,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:34:00,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:34:00,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:00,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308577477] [2024-09-11 20:34:00,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:34:00,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392865592] [2024-09-11 20:34:00,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392865592] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 20:34:00,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:34:00,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2024-09-11 20:34:00,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545694604] [2024-09-11 20:34:00,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:34:00,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:34:00,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:34:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-11 20:34:00,317 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 20:34:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:00,500 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2024-09-11 20:34:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:34:00,501 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-09-11 20:34:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:00,502 INFO L225 Difference]: With dead ends: 66 [2024-09-11 20:34:00,503 INFO L226 Difference]: Without dead ends: 64 [2024-09-11 20:34:00,503 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-11 20:34:00,504 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 18 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:00,504 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 214 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:34:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-11 20:34:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-09-11 20:34:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-09-11 20:34:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2024-09-11 20:34:00,517 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 20 [2024-09-11 20:34:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:00,518 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2024-09-11 20:34:00,518 INFO L475 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 20:34:00,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2024-09-11 20:34:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-11 20:34:00,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:00,519 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:00,535 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 20:34:00,723 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:00,724 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:00,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:00,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1440093584, now seen corresponding path program 1 times [2024-09-11 20:34:00,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:00,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136411952] [2024-09-11 20:34:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:00,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:34:00,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356868255] [2024-09-11 20:34:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:00,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:00,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:00,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:34:00,753 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 20:34:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:00,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-11 20:34:00,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:00,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:00,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:00,889 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 [2024-09-11 20:34:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:34:01,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:34:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:01,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136411952] [2024-09-11 20:34:01,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:34:01,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356868255] [2024-09-11 20:34:01,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356868255] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 20:34:01,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:34:01,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2024-09-11 20:34:01,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451162479] [2024-09-11 20:34:01,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:34:01,564 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:34:01,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:01,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:34:01,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-11 20:34:01,565 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 20:34:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:02,395 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2024-09-11 20:34:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:34:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2024-09-11 20:34:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:02,397 INFO L225 Difference]: With dead ends: 80 [2024-09-11 20:34:02,397 INFO L226 Difference]: Without dead ends: 78 [2024-09-11 20:34:02,406 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:34:02,407 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:02,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 163 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 20:34:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-11 20:34:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2024-09-11 20:34:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 43 states have internal predecessors, (44), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-09-11 20:34:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2024-09-11 20:34:02,426 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 26 [2024-09-11 20:34:02,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:02,426 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2024-09-11 20:34:02,426 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 20:34:02,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2024-09-11 20:34:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 20:34:02,427 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:02,428 INFO L216 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] [2024-09-11 20:34:02,444 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 20:34:02,631 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:02,632 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:02,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1224682067, now seen corresponding path program 1 times [2024-09-11 20:34:02,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:02,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794151047] [2024-09-11 20:34:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:02,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:34:02,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349860383] [2024-09-11 20:34:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:02,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:02,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:02,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:34:02,657 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 20:34:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:02,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-11 20:34:02,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:02,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:02,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:34:03,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:03,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2024-09-11 20:34:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:34:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:03,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794151047] [2024-09-11 20:34:03,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:34:03,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349860383] [2024-09-11 20:34:03,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349860383] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:34:03,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:34:03,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2024-09-11 20:34:03,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367438677] [2024-09-11 20:34:03,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:34:03,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:34:03,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:03,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:34:03,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-09-11 20:34:03,457 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 22 states, 16 states have (on average 1.8125) internal successors, (29), 18 states have internal predecessors, (29), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-11 20:34:09,801 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 [1] [2024-09-11 20:34:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:10,012 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2024-09-11 20:34:10,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-11 20:34:10,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.8125) internal successors, (29), 18 states have internal predecessors, (29), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 32 [2024-09-11 20:34:10,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:10,016 INFO L225 Difference]: With dead ends: 114 [2024-09-11 20:34:10,016 INFO L226 Difference]: Without dead ends: 112 [2024-09-11 20:34:10,016 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-09-11 20:34:10,017 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:10,018 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 117 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 462 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2024-09-11 20:34:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-11 20:34:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2024-09-11 20:34:10,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 69 states have internal predecessors, (71), 30 states have call successors, (30), 11 states have call predecessors, (30), 12 states have return successors, (31), 29 states have call predecessors, (31), 28 states have call successors, (31) [2024-09-11 20:34:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2024-09-11 20:34:10,061 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 32 [2024-09-11 20:34:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:10,061 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2024-09-11 20:34:10,062 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.8125) internal successors, (29), 18 states have internal predecessors, (29), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-11 20:34:10,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2024-09-11 20:34:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-11 20:34:10,063 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:10,063 INFO L216 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] [2024-09-11 20:34:10,076 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 20:34:10,264 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:10,264 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:10,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1299588988, now seen corresponding path program 1 times [2024-09-11 20:34:10,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:10,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868976141] [2024-09-11 20:34:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:10,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:11,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-09-11 20:34:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:11,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:34:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:11,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-11 20:34:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:11,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-11 20:34:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:11,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 20:34:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 20:34:11,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:11,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868976141] [2024-09-11 20:34:11,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868976141] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:34:11,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500508133] [2024-09-11 20:34:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:11,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:11,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:11,138 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:34:11,140 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 20:34:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:11,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-11 20:34:11,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:11,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-11 20:34:11,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-11 20:34:11,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:34:11,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:34:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 20:34:11,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 20:34:16,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500508133] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:34:16,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:34:16,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-09-11 20:34:16,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383664787] [2024-09-11 20:34:16,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:34:16,225 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:34:16,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:16,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:34:16,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-09-11 20:34:16,227 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 21 states, 16 states have (on average 2.5) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (15), 2 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-11 20:34:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:19,693 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2024-09-11 20:34:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 20:34:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.5) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (15), 2 states have call predecessors, (15), 4 states have call successors, (15) Word has length 42 [2024-09-11 20:34:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:19,695 INFO L225 Difference]: With dead ends: 119 [2024-09-11 20:34:19,695 INFO L226 Difference]: Without dead ends: 117 [2024-09-11 20:34:19,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-09-11 20:34:19,696 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:19,697 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 161 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-11 20:34:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-11 20:34:19,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-09-11 20:34:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 74 states have internal predecessors, (76), 30 states have call successors, (30), 12 states have call predecessors, (30), 15 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2024-09-11 20:34:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2024-09-11 20:34:19,754 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 42 [2024-09-11 20:34:19,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:19,757 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2024-09-11 20:34:19,757 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.5) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (15), 2 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-11 20:34:19,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2024-09-11 20:34:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-11 20:34:19,758 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:19,759 INFO L216 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] [2024-09-11 20:34:19,780 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 20:34:19,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-11 20:34:19,959 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:19,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:19,960 INFO L85 PathProgramCache]: Analyzing trace with hash 277886434, now seen corresponding path program 1 times [2024-09-11 20:34:19,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:19,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273776634] [2024-09-11 20:34:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:19,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:20,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:34:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:20,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:34:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:20,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:34:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:20,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:34:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:20,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:34:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:20,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 20:34:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 20:34:20,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:20,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273776634] [2024-09-11 20:34:20,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273776634] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:34:20,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:34:20,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-11 20:34:20,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162281372] [2024-09-11 20:34:20,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:34:20,748 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:34:20,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:34:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:34:20,749 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:34:21,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:21,784 INFO L93 Difference]: Finished difference Result 123 states and 145 transitions. [2024-09-11 20:34:21,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 20:34:21,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2024-09-11 20:34:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:21,786 INFO L225 Difference]: With dead ends: 123 [2024-09-11 20:34:21,786 INFO L226 Difference]: Without dead ends: 121 [2024-09-11 20:34:21,786 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:34:21,787 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:21,787 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 91 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 20:34:21,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-11 20:34:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2024-09-11 20:34:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 77 states have internal predecessors, (79), 30 states have call successors, (30), 13 states have call predecessors, (30), 16 states have return successors, (34), 30 states have call predecessors, (34), 28 states have call successors, (34) [2024-09-11 20:34:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2024-09-11 20:34:21,825 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 42 [2024-09-11 20:34:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:21,825 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2024-09-11 20:34:21,826 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:34:21,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2024-09-11 20:34:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-11 20:34:21,827 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:21,827 INFO L216 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] [2024-09-11 20:34:21,828 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-11 20:34:21,828 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:21,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash -560035385, now seen corresponding path program 2 times [2024-09-11 20:34:21,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:21,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158196262] [2024-09-11 20:34:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:34:21,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601268739] [2024-09-11 20:34:21,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:34:21,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:21,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:21,861 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:34:21,863 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 20:34:22,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:34:22,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:34:22,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-11 20:34:22,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:22,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:22,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:25,222 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-11 20:34:25,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-11 20:34:25,347 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-11 20:34:25,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-11 20:34:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:34:26,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:27,934 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 51 treesize of output 43 [2024-09-11 20:34:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-09-11 20:34:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158196262] [2024-09-11 20:34:28,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:34:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601268739] [2024-09-11 20:34:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601268739] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:34:28,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:34:28,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 27 [2024-09-11 20:34:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947180889] [2024-09-11 20:34:28,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:34:28,116 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 20:34:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:28,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 20:34:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2024-09-11 20:34:28,118 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 27 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 10 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-11 20:34:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:35,853 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2024-09-11 20:34:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-11 20:34:35,853 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 10 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 48 [2024-09-11 20:34:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:35,855 INFO L225 Difference]: With dead ends: 155 [2024-09-11 20:34:35,855 INFO L226 Difference]: Without dead ends: 153 [2024-09-11 20:34:35,857 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=341, Invalid=2209, Unknown=0, NotChecked=0, Total=2550 [2024-09-11 20:34:35,857 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 116 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:35,858 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 230 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-09-11 20:34:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-11 20:34:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2024-09-11 20:34:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 92 states have (on average 1.065217391304348) internal successors, (98), 95 states have internal predecessors, (98), 36 states have call successors, (36), 17 states have call predecessors, (36), 20 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-09-11 20:34:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 173 transitions. [2024-09-11 20:34:35,921 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 173 transitions. Word has length 48 [2024-09-11 20:34:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:35,921 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 173 transitions. [2024-09-11 20:34:35,922 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 10 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-11 20:34:35,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 173 transitions. [2024-09-11 20:34:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-11 20:34:35,923 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:35,924 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:35,942 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 20:34:36,126 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:36,126 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:36,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1232163489, now seen corresponding path program 1 times [2024-09-11 20:34:36,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:36,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753128115] [2024-09-11 20:34:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:36,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:34:36,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004460918] [2024-09-11 20:34:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:36,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:36,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:36,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:34:36,163 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 20:34:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:36,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-11 20:34:36,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:36,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:34:36,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:36,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:36,354 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 48 treesize of output 35 [2024-09-11 20:34:36,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-09-11 20:34:36,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-09-11 20:34:40,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:34:40,354 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 61 treesize of output 69 [2024-09-11 20:34:40,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:34:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 20:34:40,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:45,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:45,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753128115] [2024-09-11 20:34:45,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:34:45,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004460918] [2024-09-11 20:34:45,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004460918] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:34:45,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:34:45,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-11 20:34:45,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959394338] [2024-09-11 20:34:45,352 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:34:45,352 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 20:34:45,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:45,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 20:34:45,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=168, Unknown=1, NotChecked=0, Total=210 [2024-09-11 20:34:45,353 INFO L87 Difference]: Start difference. First operand 149 states and 173 transitions. Second operand has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-11 20:34:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:48,653 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2024-09-11 20:34:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 20:34:48,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-09-11 20:34:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:48,655 INFO L225 Difference]: With dead ends: 157 [2024-09-11 20:34:48,656 INFO L226 Difference]: Without dead ends: 155 [2024-09-11 20:34:48,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=89, Invalid=372, Unknown=1, NotChecked=0, Total=462 [2024-09-11 20:34:48,657 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:48,657 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 59 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 445 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2024-09-11 20:34:48,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-11 20:34:48,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2024-09-11 20:34:48,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 95 states have (on average 1.063157894736842) internal successors, (101), 98 states have internal predecessors, (101), 36 states have call successors, (36), 18 states have call predecessors, (36), 21 states have return successors, (39), 36 states have call predecessors, (39), 33 states have call successors, (39) [2024-09-11 20:34:48,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 176 transitions. [2024-09-11 20:34:48,733 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 176 transitions. Word has length 48 [2024-09-11 20:34:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:48,733 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 176 transitions. [2024-09-11 20:34:48,733 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-11 20:34:48,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:48,733 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 176 transitions. [2024-09-11 20:34:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-11 20:34:48,734 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:48,734 INFO L216 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] [2024-09-11 20:34:48,749 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-11 20:34:48,935 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:48,935 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:48,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1233992248, now seen corresponding path program 3 times [2024-09-11 20:34:48,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:48,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29501173] [2024-09-11 20:34:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:34:48,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890530009] [2024-09-11 20:34:48,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:34:48,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:48,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:48,968 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:34:48,970 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 20:34:49,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-11 20:34:49,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:34:49,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-11 20:34:49,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:49,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:49,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:49,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:49,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:49,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-11 20:34:50,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-11 20:34:50,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:34:50,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:34:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-11 20:34:51,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 20:34:53,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:53,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29501173] [2024-09-11 20:34:53,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:34:53,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890530009] [2024-09-11 20:34:53,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890530009] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:34:53,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:34:53,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2024-09-11 20:34:53,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711495370] [2024-09-11 20:34:53,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:34:53,131 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 20:34:53,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:53,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 20:34:53,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:34:53,132 INFO L87 Difference]: Start difference. First operand 153 states and 176 transitions. Second operand has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-11 20:34:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:58,231 INFO L93 Difference]: Finished difference Result 185 states and 212 transitions. [2024-09-11 20:34:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 20:34:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 54 [2024-09-11 20:34:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:58,233 INFO L225 Difference]: With dead ends: 185 [2024-09-11 20:34:58,233 INFO L226 Difference]: Without dead ends: 183 [2024-09-11 20:34:58,233 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2024-09-11 20:34:58,234 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 135 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:58,234 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 383 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-09-11 20:34:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-09-11 20:34:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2024-09-11 20:34:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 111 states have (on average 1.063063063063063) internal successors, (118), 115 states have internal predecessors, (118), 42 states have call successors, (42), 21 states have call predecessors, (42), 25 states have return successors, (47), 42 states have call predecessors, (47), 39 states have call successors, (47) [2024-09-11 20:34:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 207 transitions. [2024-09-11 20:34:58,316 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 207 transitions. Word has length 54 [2024-09-11 20:34:58,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:58,317 INFO L474 AbstractCegarLoop]: Abstraction has 179 states and 207 transitions. [2024-09-11 20:34:58,317 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-11 20:34:58,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:58,317 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 207 transitions. [2024-09-11 20:34:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-11 20:34:58,318 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:58,318 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:58,332 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 20:34:58,518 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:58,519 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:58,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1062890782, now seen corresponding path program 1 times [2024-09-11 20:34:58,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:58,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565910030] [2024-09-11 20:34:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:34:58,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400287947] [2024-09-11 20:34:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:58,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:58,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:58,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:34:58,549 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 20:34:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:58,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-11 20:34:58,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:58,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:58,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:59,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:34:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-11 20:34:59,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:59,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2024-09-11 20:35:00,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565910030] [2024-09-11 20:35:00,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400287947] [2024-09-11 20:35:00,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400287947] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:00,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:00,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-11 20:35:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487793550] [2024-09-11 20:35:00,500 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:00,500 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:35:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:35:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:35:00,501 INFO L87 Difference]: Start difference. First operand 179 states and 207 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-11 20:35:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:01,757 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2024-09-11 20:35:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 20:35:01,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2024-09-11 20:35:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:01,759 INFO L225 Difference]: With dead ends: 187 [2024-09-11 20:35:01,759 INFO L226 Difference]: Without dead ends: 185 [2024-09-11 20:35:01,760 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-09-11 20:35:01,760 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:01,760 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 84 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 20:35:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-09-11 20:35:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2024-09-11 20:35:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 114 states have (on average 1.0614035087719298) internal successors, (121), 118 states have internal predecessors, (121), 42 states have call successors, (42), 22 states have call predecessors, (42), 26 states have return successors, (47), 42 states have call predecessors, (47), 39 states have call successors, (47) [2024-09-11 20:35:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 210 transitions. [2024-09-11 20:35:01,833 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 210 transitions. Word has length 54 [2024-09-11 20:35:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:01,834 INFO L474 AbstractCegarLoop]: Abstraction has 183 states and 210 transitions. [2024-09-11 20:35:01,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-11 20:35:01,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 210 transitions. [2024-09-11 20:35:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-11 20:35:01,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:01,835 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:01,852 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 20:35:02,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 20:35:02,036 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:02,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:02,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1919482361, now seen corresponding path program 4 times [2024-09-11 20:35:02,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:02,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447287675] [2024-09-11 20:35:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:02,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:02,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370946345] [2024-09-11 20:35:02,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:35:02,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:02,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:02,101 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:02,115 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 20:35:02,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:35:02,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:35:02,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-09-11 20:35:02,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:02,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:02,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:02,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:02,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:02,792 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 7 treesize of output 3 [2024-09-11 20:35:04,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:35:04,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:35:04,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:35:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 3 proven. 94 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 20:35:06,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-11 20:35:07,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:07,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447287675] [2024-09-11 20:35:07,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:07,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370946345] [2024-09-11 20:35:07,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370946345] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:35:07,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:35:07,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2024-09-11 20:35:07,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428627179] [2024-09-11 20:35:07,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:07,369 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 20:35:07,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:07,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 20:35:07,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-09-11 20:35:07,370 INFO L87 Difference]: Start difference. First operand 183 states and 210 transitions. Second operand has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 8 states have call successors, (22), 9 states have call predecessors, (22), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-09-11 20:35:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:14,274 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2024-09-11 20:35:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 20:35:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 8 states have call successors, (22), 9 states have call predecessors, (22), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 60 [2024-09-11 20:35:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:14,276 INFO L225 Difference]: With dead ends: 197 [2024-09-11 20:35:14,276 INFO L226 Difference]: Without dead ends: 195 [2024-09-11 20:35:14,277 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2024-09-11 20:35:14,277 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 124 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:14,278 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 297 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-09-11 20:35:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-11 20:35:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2024-09-11 20:35:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 120 states have (on average 1.0583333333333333) internal successors, (127), 124 states have internal predecessors, (127), 42 states have call successors, (42), 24 states have call predecessors, (42), 28 states have return successors, (47), 42 states have call predecessors, (47), 39 states have call successors, (47) [2024-09-11 20:35:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2024-09-11 20:35:14,381 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 60 [2024-09-11 20:35:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:14,382 INFO L474 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2024-09-11 20:35:14,382 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 8 states have call successors, (22), 9 states have call predecessors, (22), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2024-09-11 20:35:14,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2024-09-11 20:35:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-11 20:35:14,383 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:14,383 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:14,396 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-11 20:35:14,583 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-11 20:35:14,583 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:14,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1669742887, now seen corresponding path program 1 times [2024-09-11 20:35:14,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:14,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23069791] [2024-09-11 20:35:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:14,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:14,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757574871] [2024-09-11 20:35:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:14,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:14,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:14,615 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:14,617 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 20:35:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:14,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-11 20:35:14,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:14,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:14,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:14,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:14,840 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 11 treesize of output 7 [2024-09-11 20:35:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-11 20:35:18,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:34,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:34,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23069791] [2024-09-11 20:35:34,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:34,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757574871] [2024-09-11 20:35:34,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757574871] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:34,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:34,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-11 20:35:34,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438310729] [2024-09-11 20:35:34,719 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:34,719 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 20:35:34,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:34,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 20:35:34,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=257, Unknown=3, NotChecked=0, Total=306 [2024-09-11 20:35:34,720 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-11 20:35:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:39,036 INFO L93 Difference]: Finished difference Result 199 states and 222 transitions. [2024-09-11 20:35:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 20:35:39,036 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) Word has length 60 [2024-09-11 20:35:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:39,038 INFO L225 Difference]: With dead ends: 199 [2024-09-11 20:35:39,038 INFO L226 Difference]: Without dead ends: 197 [2024-09-11 20:35:39,038 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=215, Invalid=1042, Unknown=3, NotChecked=0, Total=1260 [2024-09-11 20:35:39,039 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 74 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:39,039 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 66 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 412 Invalid, 2 Unknown, 0 Unchecked, 1.8s Time] [2024-09-11 20:35:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-11 20:35:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2024-09-11 20:35:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 123 states have (on average 1.056910569105691) internal successors, (130), 127 states have internal predecessors, (130), 42 states have call successors, (42), 25 states have call predecessors, (42), 29 states have return successors, (47), 42 states have call predecessors, (47), 39 states have call successors, (47) [2024-09-11 20:35:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 219 transitions. [2024-09-11 20:35:39,138 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 219 transitions. Word has length 60 [2024-09-11 20:35:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:39,138 INFO L474 AbstractCegarLoop]: Abstraction has 195 states and 219 transitions. [2024-09-11 20:35:39,138 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 2 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-11 20:35:39,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 219 transitions. [2024-09-11 20:35:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-11 20:35:39,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:39,139 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:39,152 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 20:35:39,342 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:39,343 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:39,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash -422813358, now seen corresponding path program 1 times [2024-09-11 20:35:39,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:39,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922341807] [2024-09-11 20:35:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:39,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537523183] [2024-09-11 20:35:39,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:39,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:39,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:39,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:39,372 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 20:35:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:39,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-11 20:35:39,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:39,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:39,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-11 20:35:40,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:41,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:41,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922341807] [2024-09-11 20:35:41,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:41,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537523183] [2024-09-11 20:35:41,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537523183] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:41,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:41,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-11 20:35:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35167593] [2024-09-11 20:35:41,384 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:41,384 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:35:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:35:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:35:41,385 INFO L87 Difference]: Start difference. First operand 195 states and 219 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-11 20:35:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:42,725 INFO L93 Difference]: Finished difference Result 203 states and 225 transitions. [2024-09-11 20:35:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 20:35:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 66 [2024-09-11 20:35:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:42,727 INFO L225 Difference]: With dead ends: 203 [2024-09-11 20:35:42,727 INFO L226 Difference]: Without dead ends: 199 [2024-09-11 20:35:42,727 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-11 20:35:42,728 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:42,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 84 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 20:35:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-11 20:35:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-11 20:35:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 125 states have (on average 1.048) internal successors, (131), 128 states have internal predecessors, (131), 42 states have call successors, (42), 26 states have call predecessors, (42), 29 states have return successors, (47), 42 states have call predecessors, (47), 39 states have call successors, (47) [2024-09-11 20:35:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 220 transitions. [2024-09-11 20:35:42,835 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 220 transitions. Word has length 66 [2024-09-11 20:35:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:42,836 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 220 transitions. [2024-09-11 20:35:42,836 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-11 20:35:42,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 220 transitions. [2024-09-11 20:35:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-11 20:35:42,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:42,837 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:42,854 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-11 20:35:43,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 20:35:43,038 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:43,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:43,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1635143177, now seen corresponding path program 1 times [2024-09-11 20:35:43,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:43,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682316121] [2024-09-11 20:35:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:43,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:43,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306575492] [2024-09-11 20:35:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:43,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:43,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:43,075 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:43,081 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 20:35:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:43,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-11 20:35:43,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:43,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:43,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:43,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-11 20:35:45,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:46,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:46,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682316121] [2024-09-11 20:35:46,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:46,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306575492] [2024-09-11 20:35:46,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306575492] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:46,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:46,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-11 20:35:46,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789458712] [2024-09-11 20:35:46,429 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:46,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:35:46,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:46,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:35:46,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:35:46,430 INFO L87 Difference]: Start difference. First operand 197 states and 220 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-11 20:35:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:47,940 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2024-09-11 20:35:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:35:47,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 72 [2024-09-11 20:35:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:47,942 INFO L225 Difference]: With dead ends: 199 [2024-09-11 20:35:47,943 INFO L226 Difference]: Without dead ends: 161 [2024-09-11 20:35:47,943 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 93 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-11 20:35:47,944 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:47,944 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 79 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 218 Invalid, 1 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 20:35:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-11 20:35:48,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-09-11 20:35:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 104 states have internal predecessors, (106), 36 states have call successors, (36), 20 states have call predecessors, (36), 23 states have return successors, (41), 36 states have call predecessors, (41), 34 states have call successors, (41) [2024-09-11 20:35:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2024-09-11 20:35:48,063 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 72 [2024-09-11 20:35:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:48,063 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2024-09-11 20:35:48,064 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-11 20:35:48,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2024-09-11 20:35:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-11 20:35:48,065 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:48,065 INFO L216 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] [2024-09-11 20:35:48,084 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-11 20:35:48,265 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 20:35:48,266 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:48,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1552443822, now seen corresponding path program 1 times [2024-09-11 20:35:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:48,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299528617] [2024-09-11 20:35:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:48,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:49,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:35:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:35:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:35:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:35:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:35:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 20:35:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-11 20:35:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:35:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:35:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:35:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-11 20:35:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-11 20:35:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-11 20:35:50,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299528617] [2024-09-11 20:35:50,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299528617] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045267075] [2024-09-11 20:35:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:50,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:50,614 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:50,617 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-11 20:35:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:50,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-11 20:35:50,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:53,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-11 20:35:53,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-09-11 20:35:53,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:35:53,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:35:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 16 proven. 130 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-11 20:35:54,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:55,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045267075] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:55,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:35:55,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2024-09-11 20:35:55,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52572528] [2024-09-11 20:35:55,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:55,924 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 20:35:55,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:55,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 20:35:55,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2024-09-11 20:35:55,925 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 23 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 19 states have internal predecessors, (46), 10 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-11 20:35:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:59,476 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2024-09-11 20:35:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 20:35:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 19 states have internal predecessors, (46), 10 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 78 [2024-09-11 20:35:59,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:59,478 INFO L225 Difference]: With dead ends: 171 [2024-09-11 20:35:59,478 INFO L226 Difference]: Without dead ends: 169 [2024-09-11 20:35:59,478 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 20:35:59,479 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:59,479 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 110 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-11 20:35:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-11 20:35:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-09-11 20:35:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 110 states have internal predecessors, (112), 36 states have call successors, (36), 22 states have call predecessors, (36), 25 states have return successors, (41), 36 states have call predecessors, (41), 34 states have call successors, (41) [2024-09-11 20:35:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2024-09-11 20:35:59,583 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 78 [2024-09-11 20:35:59,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:59,584 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2024-09-11 20:35:59,584 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 19 states have internal predecessors, (46), 10 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-11 20:35:59,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2024-09-11 20:35:59,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-11 20:35:59,585 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:59,585 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 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] [2024-09-11 20:35:59,599 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-11 20:35:59,785 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 20:35:59,786 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:59,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:59,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1062306451, now seen corresponding path program 1 times [2024-09-11 20:35:59,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:59,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776466633] [2024-09-11 20:35:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:59,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:59,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071295703] [2024-09-11 20:35:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:59,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:59,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:59,829 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:35:59,830 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 20:35:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:59,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-09-11 20:35:59,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:36:00,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:36:00,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:36:00,065 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 48 treesize of output 35 [2024-09-11 20:36:00,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-09-11 20:36:00,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-09-11 20:36:00,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:36:05,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-09-11 20:36:05,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 [2024-09-11 20:36:05,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-11 20:36:08,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:36:08,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:36:09,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-11 20:36:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 28 proven. 160 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-11 20:36:11,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:36:15,033 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 28 treesize of output 20 [2024-09-11 20:36:15,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 [2024-09-11 20:36:28,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:36:28,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776466633] [2024-09-11 20:36:28,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:36:28,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071295703] [2024-09-11 20:36:28,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071295703] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:36:28,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:36:28,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-11 20:36:28,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062176527] [2024-09-11 20:36:28,929 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:36:28,929 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 20:36:28,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:36:28,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 20:36:28,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1260, Unknown=1, NotChecked=0, Total=1406 [2024-09-11 20:36:28,930 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 27 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 20 states have internal predecessors, (36), 7 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-11 20:36:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:36:40,305 INFO L93 Difference]: Finished difference Result 177 states and 195 transitions. [2024-09-11 20:36:40,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 20:36:40,305 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 20 states have internal predecessors, (36), 7 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 84 [2024-09-11 20:36:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:36:40,307 INFO L225 Difference]: With dead ends: 177 [2024-09-11 20:36:40,307 INFO L226 Difference]: Without dead ends: 175 [2024-09-11 20:36:40,308 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=397, Invalid=3142, Unknown=1, NotChecked=0, Total=3540 [2024-09-11 20:36:40,308 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:36:40,308 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 80 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-09-11 20:36:40,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-09-11 20:36:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2024-09-11 20:36:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 113 states have internal predecessors, (115), 36 states have call successors, (36), 23 states have call predecessors, (36), 26 states have return successors, (41), 36 states have call predecessors, (41), 34 states have call successors, (41) [2024-09-11 20:36:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2024-09-11 20:36:40,422 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 84 [2024-09-11 20:36:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:36:40,423 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2024-09-11 20:36:40,423 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 20 states have internal predecessors, (36), 7 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-11 20:36:40,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2024-09-11 20:36:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-11 20:36:40,424 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:36:40,424 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 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] [2024-09-11 20:36:40,440 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-11 20:36:40,625 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-11 20:36:40,625 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:36:40,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2113450262, now seen corresponding path program 1 times [2024-09-11 20:36:40,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:36:40,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761070265] [2024-09-11 20:36:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:36:40,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:36:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:36:40,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644424469] [2024-09-11 20:36:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:36:40,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:36:40,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:36:40,678 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:36:40,679 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-11 20:36:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:36:40,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-09-11 20:36:40,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:36:40,861 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 48 treesize of output 35 [2024-09-11 20:36:40,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-09-11 20:36:40,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-09-11 20:36:40,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:36:40,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:36:40,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:01,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-11 20:37:24,943 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-11 20:37:24,943 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 42 treesize of output 45 [2024-09-11 20:37:24,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-11 20:37:25,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:37:25,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:25,634 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 107 treesize of output 123 [2024-09-11 20:37:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 23 proven. 115 refuted. 48 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-11 20:37:49,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:14,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:14,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761070265] [2024-09-11 20:38:14,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:14,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644424469] [2024-09-11 20:38:14,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644424469] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:14,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:14,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-11 20:38:14,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973092475] [2024-09-11 20:38:14,793 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:14,793 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-11 20:38:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:14,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-11 20:38:14,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=805, Unknown=11, NotChecked=0, Total=930 [2024-09-11 20:38:14,794 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand has 29 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14)