./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 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 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:34:16,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:34:16,784 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:34:16,797 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:34:16,798 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:34:16,849 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:34:16,850 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:34:16,850 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:34:16,850 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:34:16,851 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:34:16,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:34:16,855 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:34:16,856 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:34:16,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:34:16,857 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:34:16,857 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:34:16,857 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:34:16,858 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:34:16,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:34:16,861 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:34:16,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:34:16,868 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:34:16,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:34:16,869 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:34:16,869 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:34:16,869 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:34:16,869 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:34:16,870 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:34:16,870 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:34:16,870 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:34:16,870 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:34:16,871 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:34:16,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:34:16,876 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:34:16,877 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:34:16,877 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:34:16,877 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:34:16,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:34:16,877 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:34:16,878 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:34:16,878 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:34:16,878 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:34:16,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:34:17,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:34:17,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:34:17,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:34:17,425 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:34:17,429 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:34:17,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-21 12:34:19,429 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:34:19,602 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:34:19,603 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-21 12:34:19,611 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8cd94cab2/57c2d4a3c1dc416fb04b44aa99852347/FLAGd6045ece4 [2024-09-21 12:34:19,629 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8cd94cab2/57c2d4a3c1dc416fb04b44aa99852347 [2024-09-21 12:34:19,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:34:19,639 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:34:19,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:34:19,646 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:34:19,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:34:19,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:19,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f02bf5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19, skipping insertion in model container [2024-09-21 12:34:19,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:19,674 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:34:19,816 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-09-21 12:34:19,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:34:19,847 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:34:19,858 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-09-21 12:34:19,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:34:19,893 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:34:19,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19 WrapperNode [2024-09-21 12:34:19,893 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:34:19,925 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:34:19,928 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:34:19,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:34:19,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:19,968 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:19,980 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:34:19,984 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:34:19,985 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:34:19,986 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:34:19,986 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:34:19,998 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:19,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:20,001 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:20,033 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 5, 12, 11, 15, 21]. 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, 1, 2, 2, 2, 2]. [2024-09-21 12:34:20,035 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:20,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:20,043 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:20,049 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:20,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:20,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:20,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:34:20,064 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:34:20,064 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:34:20,064 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:34:20,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (1/1) ... [2024-09-21 12:34:20,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:34:20,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:20,108 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) [2024-09-21 12:34:20,114 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 [2024-09-21 12:34:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:34:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:34:20,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:34:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:34:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:34:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-21 12:34:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-21 12:34:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-21 12:34:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-21 12:34:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 12:34:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 12:34:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 12:34:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-21 12:34:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-21 12:34:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-21 12:34:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-21 12:34:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:34:20,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:34:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2024-09-21 12:34:20,169 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2024-09-21 12:34:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:34:20,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:34:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:34:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:34:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-21 12:34:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-21 12:34:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-21 12:34:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-21 12:34:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:34:20,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:34:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:34:20,294 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:34:20,296 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:34:20,529 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-21 12:34:20,529 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:34:20,561 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:34:20,562 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-21 12:34:20,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:20 BoogieIcfgContainer [2024-09-21 12:34:20,562 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:34:20,564 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:34:20,564 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:34:20,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:34:20,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:34:19" (1/3) ... [2024-09-21 12:34:20,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd6cadb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:20, skipping insertion in model container [2024-09-21 12:34:20,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:19" (2/3) ... [2024-09-21 12:34:20,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd6cadb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:20, skipping insertion in model container [2024-09-21 12:34:20,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:20" (3/3) ... [2024-09-21 12:34:20,570 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2024-09-21 12:34:20,586 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:34:20,587 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:34:20,642 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:34:20,649 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;@27683112, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:34:20,650 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:34:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-21 12:34:20,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-21 12:34:20,665 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:20,665 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:20,666 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:20,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash 775072714, now seen corresponding path program 1 times [2024-09-21 12:34:20,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:20,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805956340] [2024-09-21 12:34:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:21,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:34:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:34:21,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:21,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805956340] [2024-09-21 12:34:21,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805956340] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:34:21,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:34:21,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 12:34:21,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390159588] [2024-09-21 12:34:21,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:34:21,435 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:34:21,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:34:21,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:34:21,538 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 12:34:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:21,890 INFO L93 Difference]: Finished difference Result 102 states and 152 transitions. [2024-09-21 12:34:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:34:21,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-21 12:34:21,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:21,902 INFO L225 Difference]: With dead ends: 102 [2024-09-21 12:34:21,903 INFO L226 Difference]: Without dead ends: 60 [2024-09-21 12:34:21,908 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:34:21,914 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:21,915 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 231 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:34:21,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-21 12:34:21,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-21 12:34:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-09-21 12:34:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-09-21 12:34:21,966 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 12 [2024-09-21 12:34:21,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:21,966 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-09-21 12:34:21,967 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 12:34:21,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:21,968 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-09-21 12:34:21,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-21 12:34:21,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:21,969 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:21,969 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:34:21,970 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:21,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1351765856, now seen corresponding path program 1 times [2024-09-21 12:34:21,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:21,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531753748] [2024-09-21 12:34:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:21,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:34:21,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475673900] [2024-09-21 12:34:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:22,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:22,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:22,005 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) [2024-09-21 12:34:22,006 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:34:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:22,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-21 12:34:22,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:22,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:22,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:34:22,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:34:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:34:22,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:22,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531753748] [2024-09-21 12:34:22,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:34:22,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475673900] [2024-09-21 12:34:22,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475673900] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 12:34:22,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:34:22,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 10 [2024-09-21 12:34:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616536453] [2024-09-21 12:34:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:34:22,482 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:34:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:34:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-21 12:34:22,483 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:34:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:22,731 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-09-21 12:34:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:34:22,733 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-21 12:34:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:22,735 INFO L225 Difference]: With dead ends: 66 [2024-09-21 12:34:22,735 INFO L226 Difference]: Without dead ends: 64 [2024-09-21 12:34:22,735 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:34:22,739 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:22,739 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:34:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-21 12:34:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-09-21 12:34:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-09-21 12:34:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2024-09-21 12:34:22,759 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 18 [2024-09-21 12:34:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:22,759 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2024-09-21 12:34:22,760 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:34:22,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2024-09-21 12:34:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-21 12:34:22,761 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:22,761 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:22,787 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:34:22,965 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 [2024-09-21 12:34:22,967 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:22,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1982254220, now seen corresponding path program 1 times [2024-09-21 12:34:22,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:22,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284907482] [2024-09-21 12:34:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:22,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:34:23,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218796692] [2024-09-21 12:34:23,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:23,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:23,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:23,025 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) [2024-09-21 12:34:23,027 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:34:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:23,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-21 12:34:23,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:23,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:34:23,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:34:23,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:34:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:34:23,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284907482] [2024-09-21 12:34:23,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:34:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218796692] [2024-09-21 12:34:23,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218796692] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 12:34:23,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:34:23,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-09-21 12:34:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382445462] [2024-09-21 12:34:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:34:23,461 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:34:23,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:34:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-21 12:34:23,462 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 12:34:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:23,662 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2024-09-21 12:34:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:34:23,663 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), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-21 12:34:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:23,667 INFO L225 Difference]: With dead ends: 70 [2024-09-21 12:34:23,667 INFO L226 Difference]: Without dead ends: 68 [2024-09-21 12:34:23,668 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-21 12:34:23,668 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:23,669 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 239 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:34:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-21 12:34:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-21 12:34:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 41 states have internal predecessors, (42), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-09-21 12:34:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2024-09-21 12:34:23,688 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 24 [2024-09-21 12:34:23,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:23,688 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2024-09-21 12:34:23,688 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), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 12:34:23,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:23,689 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2024-09-21 12:34:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-21 12:34:23,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:23,690 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:34:23,712 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:34:23,890 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 [2024-09-21 12:34:23,891 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:23,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:23,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1760067974, now seen corresponding path program 1 times [2024-09-21 12:34:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:23,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796298261] [2024-09-21 12:34:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:23,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:34:23,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078596565] [2024-09-21 12:34:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:23,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:23,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:23,967 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) [2024-09-21 12:34:23,971 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:34:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:24,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-21 12:34:24,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:24,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:24,111 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 [2024-09-21 12:34:24,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:34:24,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:34:24,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2024-09-21 12:34:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:34:25,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:25,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796298261] [2024-09-21 12:34:25,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:34:25,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078596565] [2024-09-21 12:34:25,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078596565] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:34:25,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:34:25,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-09-21 12:34:25,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899317371] [2024-09-21 12:34:25,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:34:25,115 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-21 12:34:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-21 12:34:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:34:25,118 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 22 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-21 12:34:34,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-21 12:34:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:35,297 INFO L93 Difference]: Finished difference Result 113 states and 137 transitions. [2024-09-21 12:34:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-21 12:34:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 30 [2024-09-21 12:34:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:35,300 INFO L225 Difference]: With dead ends: 113 [2024-09-21 12:34:35,300 INFO L226 Difference]: Without dead ends: 111 [2024-09-21 12:34:35,301 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-09-21 12:34:35,302 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:35,302 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 222 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 724 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2024-09-21 12:34:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-21 12:34:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2024-09-21 12:34:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 64 states have (on average 1.078125) internal successors, (69), 67 states have internal predecessors, (69), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 30 states have call predecessors, (32), 29 states have call successors, (32) [2024-09-21 12:34:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2024-09-21 12:34:35,341 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 30 [2024-09-21 12:34:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:35,341 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2024-09-21 12:34:35,341 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-21 12:34:35,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2024-09-21 12:34:35,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-21 12:34:35,342 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:35,343 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, 1, 1, 1, 1] [2024-09-21 12:34:35,356 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:34:35,543 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 [2024-09-21 12:34:35,544 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:35,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:35,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1652310806, now seen corresponding path program 1 times [2024-09-21 12:34:35,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:35,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215147655] [2024-09-21 12:34:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:35,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:34:35,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994091052] [2024-09-21 12:34:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:35,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:35,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:35,586 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) [2024-09-21 12:34:35,588 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:34:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:35,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-21 12:34:35,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:35,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:35,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:34:36,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:34:36,567 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 [2024-09-21 12:34:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 12:34:36,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215147655] [2024-09-21 12:34:36,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:34:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994091052] [2024-09-21 12:34:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994091052] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:34:36,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:34:36,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-09-21 12:34:36,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569661571] [2024-09-21 12:34:36,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:34:36,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-21 12:34:36,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:36,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-21 12:34:36,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:34:36,687 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-21 12:34:43,687 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] [2024-09-21 12:34:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:43,740 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2024-09-21 12:34:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 12:34:43,740 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 36 [2024-09-21 12:34:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:43,742 INFO L225 Difference]: With dead ends: 122 [2024-09-21 12:34:43,742 INFO L226 Difference]: Without dead ends: 120 [2024-09-21 12:34:43,742 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2024-09-21 12:34:43,743 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:43,743 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 206 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 671 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2024-09-21 12:34:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-21 12:34:43,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-21 12:34:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 73 states have internal predecessors, (75), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 30 states have call predecessors, (32), 29 states have call successors, (32) [2024-09-21 12:34:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2024-09-21 12:34:43,812 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 36 [2024-09-21 12:34:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:43,812 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2024-09-21 12:34:43,813 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.875) internal successors, (30), 18 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-21 12:34:43,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2024-09-21 12:34:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 12:34:43,814 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:43,814 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, 1, 1, 1, 1] [2024-09-21 12:34:43,830 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:34:44,014 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 [2024-09-21 12:34:44,015 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:44,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:44,015 INFO L85 PathProgramCache]: Analyzing trace with hash 982058431, now seen corresponding path program 1 times [2024-09-21 12:34:44,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:44,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175276898] [2024-09-21 12:34:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:44,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:44,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:34:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:44,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:34:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:44,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:34:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:44,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 12:34:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:44,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 12:34:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:44,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 12:34:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 12:34:44,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:44,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175276898] [2024-09-21 12:34:44,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175276898] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:34:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160941907] [2024-09-21 12:34:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:44,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:44,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:44,830 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) [2024-09-21 12:34:44,831 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:34:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:44,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-21 12:34:44,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:45,400 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 [2024-09-21 12:34:45,406 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 [2024-09-21 12:34:45,449 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 [2024-09-21 12:34:45,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:34:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 12:34:45,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:34:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-21 12:34:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160941907] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:34:50,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:34:50,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2024-09-21 12:34:50,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473833715] [2024-09-21 12:34:50,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:34:50,100 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 12:34:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 12:34:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2024-09-21 12:34:50,102 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (23), 7 states have call predecessors, (23), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-21 12:34:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:53,140 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2024-09-21 12:34:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-21 12:34:53,141 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (23), 7 states have call predecessors, (23), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 46 [2024-09-21 12:34:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:53,143 INFO L225 Difference]: With dead ends: 127 [2024-09-21 12:34:53,143 INFO L226 Difference]: Without dead ends: 125 [2024-09-21 12:34:53,143 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=155, Invalid=774, Unknown=1, NotChecked=0, Total=930 [2024-09-21 12:34:53,144 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:53,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 172 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-21 12:34:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-21 12:34:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-09-21 12:34:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 78 states have internal predecessors, (80), 32 states have call successors, (32), 15 states have call predecessors, (32), 17 states have return successors, (35), 31 states have call predecessors, (35), 29 states have call successors, (35) [2024-09-21 12:34:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2024-09-21 12:34:53,220 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 46 [2024-09-21 12:34:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:53,221 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2024-09-21 12:34:53,222 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (23), 7 states have call predecessors, (23), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-21 12:34:53,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:53,222 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2024-09-21 12:34:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 12:34:53,223 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:53,223 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, 1, 1, 1, 1] [2024-09-21 12:34:53,236 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 12:34:53,427 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 [2024-09-21 12:34:53,428 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:53,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:53,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1659555766, now seen corresponding path program 1 times [2024-09-21 12:34:53,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:53,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196731521] [2024-09-21 12:34:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:53,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:53,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:34:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:53,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:34:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:34:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:34:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:34:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 12:34:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 12:34:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:34:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 12:34:54,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:34:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196731521] [2024-09-21 12:34:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196731521] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:34:54,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:34:54,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 12:34:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222610553] [2024-09-21 12:34:54,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:34:54,069 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:34:54,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:34:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:34:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:34:54,070 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 12:34:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:34:55,013 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2024-09-21 12:34:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 12:34:55,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-21 12:34:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:34:55,015 INFO L225 Difference]: With dead ends: 131 [2024-09-21 12:34:55,015 INFO L226 Difference]: Without dead ends: 129 [2024-09-21 12:34:55,015 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-21 12:34:55,016 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-21 12:34:55,016 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 102 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-21 12:34:55,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-09-21 12:34:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-09-21 12:34:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 78 states have (on average 1.064102564102564) internal successors, (83), 81 states have internal predecessors, (83), 32 states have call successors, (32), 16 states have call predecessors, (32), 18 states have return successors, (35), 31 states have call predecessors, (35), 29 states have call successors, (35) [2024-09-21 12:34:55,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2024-09-21 12:34:55,058 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 46 [2024-09-21 12:34:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:34:55,059 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2024-09-21 12:34:55,059 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 12:34:55,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2024-09-21 12:34:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-21 12:34:55,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:34:55,060 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, 1, 1, 1, 1] [2024-09-21 12:34:55,060 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-21 12:34:55,060 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:34:55,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:34:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash -279405163, now seen corresponding path program 2 times [2024-09-21 12:34:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:34:55,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944907867] [2024-09-21 12:34:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:34:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:34:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:34:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649402883] [2024-09-21 12:34:55,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:34:55,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:34:55,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:34:55,079 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) [2024-09-21 12:34:55,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:34:55,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:34:55,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:34:55,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-21 12:34:55,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:34:55,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:55,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:34:57,504 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-09-21 12:34:57,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-09-21 12:34:57,599 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-21 12:34:57,599 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 [2024-09-21 12:34:57,622 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 [2024-09-21 12:34:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 12:34:58,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:34:59,625 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 35 [2024-09-21 12:35:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-21 12:35:00,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:00,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944907867] [2024-09-21 12:35:00,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:00,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649402883] [2024-09-21 12:35:00,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649402883] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:35:00,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:35:00,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2024-09-21 12:35:00,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760049815] [2024-09-21 12:35:00,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:00,158 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-21 12:35:00,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-21 12:35:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2024-09-21 12:35:00,159 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 27 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (20), 9 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-21 12:35:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:10,890 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2024-09-21 12:35:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-21 12:35:10,891 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (20), 9 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 52 [2024-09-21 12:35:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:10,893 INFO L225 Difference]: With dead ends: 163 [2024-09-21 12:35:10,893 INFO L226 Difference]: Without dead ends: 161 [2024-09-21 12:35:10,894 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=407, Invalid=2785, Unknown=0, NotChecked=0, Total=3192 [2024-09-21 12:35:10,895 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 178 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:10,895 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 267 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-09-21 12:35:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-21 12:35:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2024-09-21 12:35:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 96 states have (on average 1.0625) internal successors, (102), 99 states have internal predecessors, (102), 38 states have call successors, (38), 20 states have call predecessors, (38), 22 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-21 12:35:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2024-09-21 12:35:10,959 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 52 [2024-09-21 12:35:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:10,959 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2024-09-21 12:35:10,959 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 11 states have call successors, (20), 9 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-21 12:35:10,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2024-09-21 12:35:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-21 12:35:10,961 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:10,961 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, 1, 1, 1, 1] [2024-09-21 12:35:10,979 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 12:35:11,164 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 [2024-09-21 12:35:11,165 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:11,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:11,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1573894041, now seen corresponding path program 1 times [2024-09-21 12:35:11,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:11,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34460228] [2024-09-21 12:35:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:11,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:11,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286228912] [2024-09-21 12:35:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:11,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:11,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:11,188 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) [2024-09-21 12:35:11,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:35:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:11,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-21 12:35:11,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:11,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:11,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 12:35:12,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:13,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:13,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34460228] [2024-09-21 12:35:13,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:13,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286228912] [2024-09-21 12:35:13,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286228912] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:35:13,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:35:13,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-21 12:35:13,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092245276] [2024-09-21 12:35:13,016 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:13,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:35:13,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:35:13,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-09-21 12:35:13,017 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-21 12:35:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:15,206 INFO L93 Difference]: Finished difference Result 165 states and 186 transitions. [2024-09-21 12:35:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:35:15,207 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), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2024-09-21 12:35:15,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:15,209 INFO L225 Difference]: With dead ends: 165 [2024-09-21 12:35:15,209 INFO L226 Difference]: Without dead ends: 163 [2024-09-21 12:35:15,209 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:35:15,210 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:15,210 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 1.6s Time] [2024-09-21 12:35:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-21 12:35:15,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2024-09-21 12:35:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 102 states have internal predecessors, (105), 38 states have call successors, (38), 21 states have call predecessors, (38), 23 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-21 12:35:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2024-09-21 12:35:15,277 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 52 [2024-09-21 12:35:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:15,277 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2024-09-21 12:35:15,278 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), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-21 12:35:15,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2024-09-21 12:35:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 12:35:15,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:15,279 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, 1, 1, 1, 1] [2024-09-21 12:35:15,297 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-21 12:35:15,479 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 [2024-09-21 12:35:15,480 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:15,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:15,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1781053975, now seen corresponding path program 3 times [2024-09-21 12:35:15,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:15,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737900701] [2024-09-21 12:35:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:15,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:15,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796889937] [2024-09-21 12:35:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:35:15,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:15,513 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) [2024-09-21 12:35:15,515 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:35:15,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-21 12:35:15,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:35:15,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-21 12:35:15,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:15,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:35:15,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:15,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:17,623 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 [2024-09-21 12:35:17,647 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 [2024-09-21 12:35:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-21 12:35:18,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:35:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-21 12:35:20,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:35:20,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737900701] [2024-09-21 12:35:20,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:35:20,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796889937] [2024-09-21 12:35:20,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796889937] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:35:20,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:35:20,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-09-21 12:35:20,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270101897] [2024-09-21 12:35:20,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:35:20,770 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 12:35:20,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:35:20,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 12:35:20,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-09-21 12:35:20,771 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (22), 9 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-21 12:35:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:35:26,735 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2024-09-21 12:35:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 12:35:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (22), 9 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 58 [2024-09-21 12:35:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:35:26,738 INFO L225 Difference]: With dead ends: 171 [2024-09-21 12:35:26,738 INFO L226 Difference]: Without dead ends: 169 [2024-09-21 12:35:26,739 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:35:26,740 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 101 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-21 12:35:26,741 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 453 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-09-21 12:35:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-21 12:35:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2024-09-21 12:35:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 105 states have internal predecessors, (108), 38 states have call successors, (38), 22 states have call predecessors, (38), 24 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-21 12:35:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2024-09-21 12:35:26,821 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 58 [2024-09-21 12:35:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:35:26,821 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2024-09-21 12:35:26,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (22), 9 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-21 12:35:26,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2024-09-21 12:35:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 12:35:26,823 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:35:26,823 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, 1, 1, 1, 1] [2024-09-21 12:35:26,841 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-21 12:35:27,027 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 [2024-09-21 12:35:27,028 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:35:27,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:35:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1103831102, now seen corresponding path program 1 times [2024-09-21 12:35:27,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:35:27,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523390671] [2024-09-21 12:35:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:27,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:35:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:35:27,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889640332] [2024-09-21 12:35:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:35:27,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:35:27,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:35:27,067 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) [2024-09-21 12:35:27,070 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 12:35:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:35:27,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-21 12:35:27,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:35:27,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:27,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:35:27,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-21 12:36:21,289 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 [2024-09-21 12:36:33,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:36:33,058 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 68 treesize of output 72 [2024-09-21 12:36:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-21 12:36:33,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:35,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-21 12:36:37,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:37,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523390671] [2024-09-21 12:36:37,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:37,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889640332] [2024-09-21 12:36:37,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889640332] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:37,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:36:37,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-21 12:36:37,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975615430] [2024-09-21 12:36:37,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:36:37,266 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 12:36:37,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 12:36:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=471, Unknown=3, NotChecked=0, Total=552 [2024-09-21 12:36:37,267 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-21 12:36:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:43,900 INFO L93 Difference]: Finished difference Result 173 states and 192 transitions. [2024-09-21 12:36:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-21 12:36:43,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2024-09-21 12:36:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:43,902 INFO L225 Difference]: With dead ends: 173 [2024-09-21 12:36:43,902 INFO L226 Difference]: Without dead ends: 171 [2024-09-21 12:36:43,903 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=256, Invalid=1463, Unknown=3, NotChecked=0, Total=1722 [2024-09-21 12:36:43,903 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:43,903 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 95 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-09-21 12:36:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-21 12:36:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-09-21 12:36:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 105 states have (on average 1.0571428571428572) internal successors, (111), 108 states have internal predecessors, (111), 38 states have call successors, (38), 23 states have call predecessors, (38), 25 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-21 12:36:43,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2024-09-21 12:36:43,994 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 58 [2024-09-21 12:36:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:43,994 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2024-09-21 12:36:43,994 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-21 12:36:43,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2024-09-21 12:36:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-21 12:36:43,997 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:43,997 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, 1, 1, 1, 1] [2024-09-21 12:36:44,010 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 12:36:44,197 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 [2024-09-21 12:36:44,197 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:44,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1703546843, now seen corresponding path program 1 times [2024-09-21 12:36:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:44,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372674478] [2024-09-21 12:36:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:44,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:44,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916313674] [2024-09-21 12:36:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:44,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:44,234 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) [2024-09-21 12:36:44,235 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 12:36:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:44,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-21 12:36:44,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:44,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:36:44,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:36:44,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 12:36:45,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:46,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:46,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372674478] [2024-09-21 12:36:46,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:46,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916313674] [2024-09-21 12:36:46,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916313674] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:46,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:36:46,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-21 12:36:46,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819779826] [2024-09-21 12:36:46,528 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:36:46,528 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 12:36:46,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 12:36:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:36:46,528 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-21 12:36:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:48,588 INFO L93 Difference]: Finished difference Result 177 states and 195 transitions. [2024-09-21 12:36:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-21 12:36:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2024-09-21 12:36:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:48,589 INFO L225 Difference]: With dead ends: 177 [2024-09-21 12:36:48,589 INFO L226 Difference]: Without dead ends: 175 [2024-09-21 12:36:48,590 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-09-21 12:36:48,590 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:48,590 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 98 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-21 12:36:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-09-21 12:36:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2024-09-21 12:36:48,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 111 states have internal predecessors, (114), 38 states have call successors, (38), 24 states have call predecessors, (38), 26 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-21 12:36:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2024-09-21 12:36:48,668 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 64 [2024-09-21 12:36:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:48,668 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2024-09-21 12:36:48,669 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-21 12:36:48,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2024-09-21 12:36:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-21 12:36:48,669 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:48,670 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, 1, 1, 1, 1] [2024-09-21 12:36:48,683 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-21 12:36:48,872 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 [2024-09-21 12:36:48,873 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:48,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:48,873 INFO L85 PathProgramCache]: Analyzing trace with hash -767700430, now seen corresponding path program 1 times [2024-09-21 12:36:48,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:48,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746675859] [2024-09-21 12:36:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:48,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:48,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4134610] [2024-09-21 12:36:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:48,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:48,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:48,892 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) [2024-09-21 12:36:48,900 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 12:36:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:49,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-21 12:36:49,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:49,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:49,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-21 12:36:50,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:50,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746675859] [2024-09-21 12:36:50,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:50,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4134610] [2024-09-21 12:36:50,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4134610] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:50,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:36:50,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-21 12:36:50,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768216967] [2024-09-21 12:36:50,880 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:36:50,880 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:36:50,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:50,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:36:50,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:36:50,881 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-21 12:36:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:52,161 INFO L93 Difference]: Finished difference Result 181 states and 198 transitions. [2024-09-21 12:36:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:36:52,161 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), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-09-21 12:36:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:52,162 INFO L225 Difference]: With dead ends: 181 [2024-09-21 12:36:52,162 INFO L226 Difference]: Without dead ends: 177 [2024-09-21 12:36:52,163 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-21 12:36:52,166 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 40 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:52,166 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 95 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 215 Invalid, 3 Unknown, 0 Unchecked, 0.9s Time] [2024-09-21 12:36:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-21 12:36:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2024-09-21 12:36:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 112 states have internal predecessors, (115), 38 states have call successors, (38), 25 states have call predecessors, (38), 26 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-21 12:36:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 193 transitions. [2024-09-21 12:36:52,260 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 193 transitions. Word has length 70 [2024-09-21 12:36:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:52,261 INFO L474 AbstractCegarLoop]: Abstraction has 175 states and 193 transitions. [2024-09-21 12:36:52,261 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), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-21 12:36:52,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 193 transitions. [2024-09-21 12:36:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-21 12:36:52,262 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:52,262 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, 1, 1, 1, 1] [2024-09-21 12:36:52,275 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-21 12:36:52,466 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 [2024-09-21 12:36:52,466 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:52,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash 593297479, now seen corresponding path program 1 times [2024-09-21 12:36:52,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:52,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597595361] [2024-09-21 12:36:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:52,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:36:52,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963862332] [2024-09-21 12:36:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:52,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:36:52,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:36:52,506 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) [2024-09-21 12:36:52,513 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 12:36:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:36:52,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-21 12:36:52,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:36:52,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:52,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:52,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:36:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-21 12:36:55,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:36:56,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:36:56,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597595361] [2024-09-21 12:36:56,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:36:56,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963862332] [2024-09-21 12:36:56,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963862332] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:36:56,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:36:56,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-21 12:36:56,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983359483] [2024-09-21 12:36:56,508 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:36:56,508 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:36:56,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:36:56,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:36:56,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:36:56,509 INFO L87 Difference]: Start difference. First operand 175 states and 193 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-21 12:36:58,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:36:58,755 INFO L93 Difference]: Finished difference Result 177 states and 194 transitions. [2024-09-21 12:36:58,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:36:58,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 76 [2024-09-21 12:36:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:36:58,758 INFO L225 Difference]: With dead ends: 177 [2024-09-21 12:36:58,758 INFO L226 Difference]: Without dead ends: 139 [2024-09-21 12:36:58,758 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-21 12:36:58,760 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 37 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-21 12:36:58,760 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 228 Invalid, 3 Unknown, 0 Unchecked, 1.6s Time] [2024-09-21 12:36:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-21 12:36:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-09-21 12:36:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 88 states have internal predecessors, (90), 32 states have call successors, (32), 19 states have call predecessors, (32), 20 states have return successors, (34), 31 states have call predecessors, (34), 29 states have call successors, (34) [2024-09-21 12:36:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 156 transitions. [2024-09-21 12:36:58,855 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 156 transitions. Word has length 76 [2024-09-21 12:36:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:36:58,856 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 156 transitions. [2024-09-21 12:36:58,856 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-21 12:36:58,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 156 transitions. [2024-09-21 12:36:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-21 12:36:58,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:36:58,857 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, 1, 1, 1, 1] [2024-09-21 12:36:58,876 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-21 12:36:59,058 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 [2024-09-21 12:36:59,059 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:36:59,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:36:59,060 INFO L85 PathProgramCache]: Analyzing trace with hash 394387029, now seen corresponding path program 1 times [2024-09-21 12:36:59,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:36:59,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236380262] [2024-09-21 12:36:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:36:59,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:36:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:00,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:37:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:00,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:37:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:37:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:37:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:37:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 12:37:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 12:37:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 12:37:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:37:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:37:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:37:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 12:37:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 12:37:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-21 12:37:01,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:37:01,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236380262] [2024-09-21 12:37:01,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236380262] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:37:01,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292307278] [2024-09-21 12:37:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:37:01,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:37:01,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:37:01,716 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) [2024-09-21 12:37:01,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 12:37:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:01,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-21 12:37:01,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:37:05,189 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 24 treesize of output 13 [2024-09-21 12:37:05,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-21 12:37:05,222 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 13 treesize of output 11 [2024-09-21 12:37:09,630 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 [2024-09-21 12:37:09,643 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 [2024-09-21 12:37:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 16 proven. 83 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-09-21 12:37:10,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:37:14,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292307278] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:37:14,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:37:14,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 27 [2024-09-21 12:37:14,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95535619] [2024-09-21 12:37:14,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:37:14,827 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-21 12:37:14,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:37:14,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-21 12:37:14,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-09-21 12:37:14,828 INFO L87 Difference]: Start difference. First operand 139 states and 156 transitions. Second operand has 27 states, 20 states have (on average 2.75) internal successors, (55), 22 states have internal predecessors, (55), 12 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2024-09-21 12:37:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:37:20,576 INFO L93 Difference]: Finished difference Result 149 states and 165 transitions. [2024-09-21 12:37:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-21 12:37:20,577 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 2.75) internal successors, (55), 22 states have internal predecessors, (55), 12 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) Word has length 82 [2024-09-21 12:37:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:37:20,578 INFO L225 Difference]: With dead ends: 149 [2024-09-21 12:37:20,578 INFO L226 Difference]: Without dead ends: 147 [2024-09-21 12:37:20,579 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2024-09-21 12:37:20,579 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-09-21 12:37:20,580 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 118 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-09-21 12:37:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-21 12:37:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-09-21 12:37:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 94 states have internal predecessors, (96), 32 states have call successors, (32), 21 states have call predecessors, (32), 22 states have return successors, (34), 31 states have call predecessors, (34), 29 states have call successors, (34) [2024-09-21 12:37:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 162 transitions. [2024-09-21 12:37:20,686 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 162 transitions. Word has length 82 [2024-09-21 12:37:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:37:20,686 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 162 transitions. [2024-09-21 12:37:20,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 2.75) internal successors, (55), 22 states have internal predecessors, (55), 12 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2024-09-21 12:37:20,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:37:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 162 transitions. [2024-09-21 12:37:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-21 12:37:20,688 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:37:20,688 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, 1, 1, 1, 1] [2024-09-21 12:37:20,706 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-21 12:37:20,892 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 [2024-09-21 12:37:20,893 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:37:20,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:37:20,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1573323314, now seen corresponding path program 1 times [2024-09-21 12:37:20,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:37:20,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955338751] [2024-09-21 12:37:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:37:20,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:37:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:37:20,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826612115] [2024-09-21 12:37:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:37:20,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:37:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:37:20,926 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) [2024-09-21 12:37:20,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-21 12:37:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:37:21,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-09-21 12:37:21,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:37:21,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:37:21,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:37:21,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:37:21,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:37:21,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-21 12:37:26,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:37:32,297 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 [2024-09-21 12:37:32,418 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-21 12:37:32,418 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 36 treesize of output 39 [2024-09-21 12:37:32,519 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 [2024-09-21 12:37:33,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:37:33,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 109 [2024-09-21 12:37:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 123 proven. 65 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-21 12:37:34,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:37:40,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:37:40,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955338751] [2024-09-21 12:37:40,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:37:40,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826612115] [2024-09-21 12:37:40,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826612115] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:37:40,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:37:40,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-21 12:37:40,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423467293] [2024-09-21 12:37:40,763 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:37:40,763 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-21 12:37:40,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:37:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-21 12:37:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2024-09-21 12:37:40,764 INFO L87 Difference]: Start difference. First operand 147 states and 162 transitions. Second operand has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-21 12:37:52,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:37:52,655 INFO L93 Difference]: Finished difference Result 155 states and 168 transitions. [2024-09-21 12:37:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-21 12:37:52,656 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 88 [2024-09-21 12:37:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:37:52,657 INFO L225 Difference]: With dead ends: 155 [2024-09-21 12:37:52,657 INFO L226 Difference]: Without dead ends: 153 [2024-09-21 12:37:52,657 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=359, Invalid=2501, Unknown=2, NotChecked=0, Total=2862 [2024-09-21 12:37:52,658 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 56 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:37:52,658 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 114 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 984 Invalid, 10 Unknown, 0 Unchecked, 5.1s Time] [2024-09-21 12:37:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-21 12:37:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2024-09-21 12:37:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 97 states have internal predecessors, (99), 32 states have call successors, (32), 22 states have call predecessors, (32), 23 states have return successors, (34), 31 states have call predecessors, (34), 29 states have call successors, (34) [2024-09-21 12:37:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2024-09-21 12:37:52,754 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 88 [2024-09-21 12:37:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:37:52,754 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2024-09-21 12:37:52,754 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-21 12:37:52,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:37:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2024-09-21 12:37:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-21 12:37:52,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:37:52,755 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:37:52,769 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-21 12:37:52,956 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 [2024-09-21 12:37:52,956 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:37:52,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:37:52,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1625324318, now seen corresponding path program 4 times [2024-09-21 12:37:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:37:52,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428956592] [2024-09-21 12:37:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:37:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:37:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:37:52,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880584540] [2024-09-21 12:37:52,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:37:52,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:37:52,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:37:52,981 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) [2024-09-21 12:37:52,981 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-21 12:37:53,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:37:53,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:37:53,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-09-21 12:37:53,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:37:59,808 INFO L349 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2024-09-21 12:37:59,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 147 treesize of output 145 [2024-09-21 12:38:00,086 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-21 12:38:00,087 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 87 treesize of output 94 [2024-09-21 12:38:00,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:38:00,470 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 69 treesize of output 89 [2024-09-21 12:38:00,490 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 81 treesize of output 71