./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.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 de325976 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_mannadiv.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 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 --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-de32597-m [2024-09-17 19:31:34,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:31:34,929 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:31:34,933 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:31:34,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:31:34,960 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:31:34,960 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:31:34,961 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:31:34,961 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:31:34,962 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:31:34,963 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:31:34,963 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:31:34,964 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:31:34,965 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:31:34,965 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:31:34,966 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:31:34,966 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:31:34,966 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:31:34,966 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:31:34,966 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:31:34,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:31:34,967 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:31:34,967 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:31:34,971 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:31:34,971 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:31:34,971 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:31:34,971 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:31:34,972 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:31:34,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:31:34,972 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:31:34,972 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:31:34,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:31:34,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:31:34,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:31:34,973 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:31:34,973 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:31:34,973 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:31:34,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:31:34,973 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:31:34,974 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:31:34,974 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:31:34,974 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:31:34,974 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 19:31:35,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:31:35,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:31:35,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:31:35,214 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:31:35,215 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:31:35,215 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-09-17 19:31:36,424 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:31:36,558 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:31:36,559 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-09-17 19:31:36,565 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a7838f63f/703d2ba2a67b453e9d05c09e11ff4799/FLAGbc85b1d2b [2024-09-17 19:31:36,575 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a7838f63f/703d2ba2a67b453e9d05c09e11ff4799 [2024-09-17 19:31:36,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:31:36,578 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 19:31:36,579 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:31:36,579 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:31:36,586 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:31:36,586 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,587 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49166a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36, skipping insertion in model container [2024-09-17 19:31:36,587 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,618 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:31:36,754 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_mannadiv.c[1105,1118] [2024-09-17 19:31:36,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:31:36,786 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 19:31:36,794 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_mannadiv.c[1105,1118] [2024-09-17 19:31:36,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:31:36,811 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:31:36,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36 WrapperNode [2024-09-17 19:31:36,812 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:31:36,813 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:31:36,813 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:31:36,813 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:31:36,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,824 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,829 INFO L138 Inliner]: procedures = 16, calls = 57, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 19:31:36,829 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:31:36,829 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:31:36,830 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:31:36,830 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:31:36,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,838 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,850 INFO L175 MemorySlicer]: Split 31 memory accesses to 6 slices as follows [2, 5, 7, 5, 5, 7]. 23 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 1, 3, 2, 1, 3]. [2024-09-17 19:31:36,850 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,850 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,859 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,867 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,869 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,871 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:31:36,872 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:31:36,872 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:31:36,872 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:31:36,873 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (1/1) ... [2024-09-17 19:31:36,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:31:36,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:31:36,901 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) [2024-09-17 19:31:36,902 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 [2024-09-17 19:31:36,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:31:36,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 19:31:36,938 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 19:31:36,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 19:31:36,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 19:31:36,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 19:31:36,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-17 19:31:36,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-17 19:31:36,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-17 19:31:36,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-17 19:31:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-17 19:31:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-17 19:31:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-17 19:31:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-17 19:31:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-17 19:31:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-17 19:31:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-17 19:31:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-17 19:31:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 19:31:36,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 19:31:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_42_0 [2024-09-17 19:31:36,942 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_42_0 [2024-09-17 19:31:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:31:36,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:31:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-17 19:31:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-17 19:31:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-17 19:31:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-17 19:31:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-17 19:31:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-17 19:31:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 19:31:36,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 19:31:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-17 19:31:37,023 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:31:37,025 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:31:37,175 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-17 19:31:37,175 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:31:37,196 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:31:37,196 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-17 19:31:37,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:31:37 BoogieIcfgContainer [2024-09-17 19:31:37,197 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:31:37,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:31:37,198 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:31:37,200 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:31:37,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:31:36" (1/3) ... [2024-09-17 19:31:37,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328fb438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:31:37, skipping insertion in model container [2024-09-17 19:31:37,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:31:36" (2/3) ... [2024-09-17 19:31:37,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328fb438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:31:37, skipping insertion in model container [2024-09-17 19:31:37,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:31:37" (3/3) ... [2024-09-17 19:31:37,202 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_mannadiv.c [2024-09-17 19:31:37,214 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:31:37,214 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 19:31:37,249 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:31:37,254 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;@64e23f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:31:37,254 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 19:31:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 19:31:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-17 19:31:37,265 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:31:37,265 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:31:37,266 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:31:37,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1619877398, now seen corresponding path program 1 times [2024-09-17 19:31:37,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:31:37,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182269809] [2024-09-17 19:31:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:37,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:31:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:31:37,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:31:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:31:37,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:31:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:31:37,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:31:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:31:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 19:31:37,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:31:37,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182269809] [2024-09-17 19:31:37,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182269809] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:31:37,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:31:37,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 19:31:37,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534805947] [2024-09-17 19:31:37,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:31:37,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 19:31:37,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:31:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 19:31:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 19:31:37,509 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 19:31:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:31:37,542 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2024-09-17 19:31:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 19:31:37,548 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-17 19:31:37,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:31:37,553 INFO L225 Difference]: With dead ends: 64 [2024-09-17 19:31:37,553 INFO L226 Difference]: Without dead ends: 31 [2024-09-17 19:31:37,556 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 19:31:37,561 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:31:37,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:31:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-17 19:31:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-17 19:31:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 19:31:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-17 19:31:37,587 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2024-09-17 19:31:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:31:37,588 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-17 19:31:37,588 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 19:31:37,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-17 19:31:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-17 19:31:37,590 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:31:37,590 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:31:37,590 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:31:37,590 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:31:37,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1787806574, now seen corresponding path program 1 times [2024-09-17 19:31:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:31:37,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010549990] [2024-09-17 19:31:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:37,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:31:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:31:37,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44326489] [2024-09-17 19:31:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:37,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:31:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:31:37,668 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) [2024-09-17 19:31:37,670 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:31:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:31:37,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-17 19:31:37,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:31:37,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:37,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:37,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:37,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:31:38,000 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 [2024-09-17 19:31:38,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-17 19:31:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 19:31:38,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:31:38,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:31:38,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010549990] [2024-09-17 19:31:38,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:31:38,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44326489] [2024-09-17 19:31:38,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44326489] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:31:38,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:31:38,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-17 19:31:38,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970495377] [2024-09-17 19:31:38,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:31:38,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-17 19:31:38,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:31:38,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-17 19:31:38,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-17 19:31:38,046 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-17 19:31:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:31:38,167 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-09-17 19:31:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 19:31:38,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-17 19:31:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:31:38,169 INFO L225 Difference]: With dead ends: 46 [2024-09-17 19:31:38,169 INFO L226 Difference]: Without dead ends: 44 [2024-09-17 19:31:38,170 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-17 19:31:38,171 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:31:38,171 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:31:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-17 19:31:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-09-17 19:31:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-17 19:31:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-09-17 19:31:38,184 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 24 [2024-09-17 19:31:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:31:38,184 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-09-17 19:31:38,184 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-17 19:31:38,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-09-17 19:31:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-17 19:31:38,185 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:31:38,185 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:31:38,199 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 19:31:38,390 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 [2024-09-17 19:31:38,391 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:31:38,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:38,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1422973788, now seen corresponding path program 1 times [2024-09-17 19:31:38,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:31:38,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961206898] [2024-09-17 19:31:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:38,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:31:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:31:38,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502886829] [2024-09-17 19:31:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:38,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:31:38,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:31:38,445 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) [2024-09-17 19:31:38,446 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:31:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:31:38,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-17 19:31:38,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:31:38,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:38,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:38,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:31:38,566 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 [2024-09-17 19:31:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 19:31:38,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:31:38,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:31:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961206898] [2024-09-17 19:31:38,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:31:38,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502886829] [2024-09-17 19:31:38,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502886829] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:31:38,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:31:38,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-17 19:31:38,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038045367] [2024-09-17 19:31:38,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:31:38,729 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-17 19:31:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:31:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-17 19:31:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-17 19:31:38,732 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 19:31:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:31:38,962 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2024-09-17 19:31:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 19:31:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-09-17 19:31:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:31:38,964 INFO L225 Difference]: With dead ends: 52 [2024-09-17 19:31:38,964 INFO L226 Difference]: Without dead ends: 42 [2024-09-17 19:31:38,965 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-09-17 19:31:38,966 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:31:38,966 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:31:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-17 19:31:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-17 19:31:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-17 19:31:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-09-17 19:31:38,973 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2024-09-17 19:31:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:31:38,973 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-09-17 19:31:38,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 19:31:38,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-09-17 19:31:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-17 19:31:38,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:31:38,976 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:31:38,988 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-17 19:31:39,176 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 [2024-09-17 19:31:39,176 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:31:39,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash 480719411, now seen corresponding path program 1 times [2024-09-17 19:31:39,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:31:39,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608024768] [2024-09-17 19:31:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:39,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:31:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:31:39,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852014388] [2024-09-17 19:31:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:39,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:31:39,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:31:39,224 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) [2024-09-17 19:31:39,225 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:31:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:31:39,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-09-17 19:31:39,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:31:39,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-17 19:31:39,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:39,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:39,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:39,347 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 15 treesize of output 11 [2024-09-17 19:31:39,517 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 [2024-09-17 19:31:39,521 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 [2024-09-17 19:31:39,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-09-17 19:31:39,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-17 19:31:39,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-17 19:31:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 19:31:39,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:31:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 19:31:39,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:31:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608024768] [2024-09-17 19:31:39,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:31:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852014388] [2024-09-17 19:31:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852014388] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:31:39,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:31:39,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-09-17 19:31:39,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405538180] [2024-09-17 19:31:39,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 19:31:39,972 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 19:31:39,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:31:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 19:31:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-09-17 19:31:39,973 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 19:31:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:31:40,515 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-09-17 19:31:40,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 19:31:40,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-09-17 19:31:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:31:40,517 INFO L225 Difference]: With dead ends: 63 [2024-09-17 19:31:40,517 INFO L226 Difference]: Without dead ends: 59 [2024-09-17 19:31:40,518 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-09-17 19:31:40,518 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:31:40,518 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 244 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:31:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-17 19:31:40,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2024-09-17 19:31:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-17 19:31:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-09-17 19:31:40,546 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 35 [2024-09-17 19:31:40,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:31:40,547 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-09-17 19:31:40,547 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 19:31:40,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-09-17 19:31:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-17 19:31:40,549 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:31:40,550 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:31:40,564 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-17 19:31:40,753 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 [2024-09-17 19:31:40,754 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:31:40,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:40,754 INFO L85 PathProgramCache]: Analyzing trace with hash 474321093, now seen corresponding path program 1 times [2024-09-17 19:31:40,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:31:40,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408734590] [2024-09-17 19:31:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:40,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:31:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:31:40,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047423263] [2024-09-17 19:31:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:40,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:31:40,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:31:40,798 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) [2024-09-17 19:31:40,798 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:31:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:31:40,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-09-17 19:31:40,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:31:40,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:40,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:31:40,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:31:40,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:40,983 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 [2024-09-17 19:31:41,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-17 19:31:41,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-09-17 19:31:41,634 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 [2024-09-17 19:31:41,641 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 [2024-09-17 19:31:41,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:31:41,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2024-09-17 19:31:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:31:41,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:31:42,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:31:42,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408734590] [2024-09-17 19:31:42,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:31:42,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047423263] [2024-09-17 19:31:42,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047423263] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:31:42,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:31:42,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-17 19:31:42,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172521275] [2024-09-17 19:31:42,636 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:31:42,636 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 19:31:42,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:31:42,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 19:31:42,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:31:42,637 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:31:46,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:31:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:31:47,345 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2024-09-17 19:31:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-17 19:31:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-17 19:31:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:31:47,346 INFO L225 Difference]: With dead ends: 68 [2024-09-17 19:31:47,346 INFO L226 Difference]: Without dead ends: 58 [2024-09-17 19:31:47,347 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 19:31:47,348 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:31:47,348 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 129 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-09-17 19:31:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-17 19:31:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-09-17 19:31:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 12 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-17 19:31:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2024-09-17 19:31:47,362 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 47 [2024-09-17 19:31:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:31:47,362 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2024-09-17 19:31:47,362 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:31:47,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2024-09-17 19:31:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-17 19:31:47,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:31:47,364 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:31:47,377 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 19:31:47,567 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 [2024-09-17 19:31:47,568 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:31:47,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash -343327357, now seen corresponding path program 1 times [2024-09-17 19:31:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:31:47,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417382398] [2024-09-17 19:31:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:47,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:31:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:31:47,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179809356] [2024-09-17 19:31:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:47,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:31:47,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:31:47,611 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) [2024-09-17 19:31:47,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:31:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:31:47,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-09-17 19:31:47,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:31:47,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:47,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:47,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:31:47,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:47,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:31:47,840 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 [2024-09-17 19:31:49,406 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 35 treesize of output 27 [2024-09-17 19:31:49,414 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 32 treesize of output 24 [2024-09-17 19:31:49,778 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 [2024-09-17 19:31:49,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:31:49,851 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 32 treesize of output 28 [2024-09-17 19:31:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:31:49,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:31:50,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:31:50,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417382398] [2024-09-17 19:31:50,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:31:50,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179809356] [2024-09-17 19:31:50,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179809356] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:31:50,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:31:50,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-17 19:31:50,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189928148] [2024-09-17 19:31:50,631 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:31:50,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 19:31:50,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:31:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 19:31:50,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 19:31:50,632 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:31:54,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:31:58,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:31:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:31:59,698 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2024-09-17 19:31:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-17 19:31:59,698 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-17 19:31:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:31:59,700 INFO L225 Difference]: With dead ends: 66 [2024-09-17 19:31:59,701 INFO L226 Difference]: Without dead ends: 60 [2024-09-17 19:31:59,702 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=221, Invalid=1759, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 19:31:59,702 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 20 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-09-17 19:31:59,702 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 152 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 495 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2024-09-17 19:31:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-17 19:31:59,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2024-09-17 19:31:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-17 19:31:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-09-17 19:31:59,725 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 47 [2024-09-17 19:31:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:31:59,726 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-09-17 19:31:59,726 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:31:59,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-09-17 19:31:59,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-17 19:31:59,728 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:31:59,728 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-17 19:31:59,742 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 19:31:59,932 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 [2024-09-17 19:31:59,933 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:31:59,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:31:59,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1442337340, now seen corresponding path program 2 times [2024-09-17 19:31:59,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:31:59,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33658945] [2024-09-17 19:31:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:31:59,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:31:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:31:59,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303243553] [2024-09-17 19:31:59,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:31:59,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:31:59,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:31:59,990 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) [2024-09-17 19:31:59,991 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:32:00,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:32:00,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:32:00,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-09-17 19:32:00,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:32:00,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-17 19:32:00,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:00,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:00,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-17 19:32:00,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:00,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:00,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2024-09-17 19:32:00,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-17 19:32:00,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-17 19:32:00,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-17 19:32:00,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-17 19:32:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 19:32:01,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:32:02,308 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 88 treesize of output 84 [2024-09-17 19:32:02,310 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 146 treesize of output 138 [2024-09-17 19:32:02,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:32:02,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33658945] [2024-09-17 19:32:02,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:32:02,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303243553] [2024-09-17 19:32:02,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303243553] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:32:02,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:32:02,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-17 19:32:02,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210979503] [2024-09-17 19:32:02,523 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:32:02,523 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 19:32:02,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:32:02,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 19:32:02,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 19:32:02,524 INFO L87 Difference]: Start difference. First operand 57 states and 63 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, (11), 5 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-17 19:32:06,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:32:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:32:07,362 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2024-09-17 19:32:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-17 19:32:07,363 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, (11), 5 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2024-09-17 19:32:07,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:32:07,364 INFO L225 Difference]: With dead ends: 68 [2024-09-17 19:32:07,364 INFO L226 Difference]: Without dead ends: 56 [2024-09-17 19:32:07,365 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 19:32:07,365 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:32:07,365 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 141 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 483 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-09-17 19:32:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-17 19:32:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2024-09-17 19:32:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-17 19:32:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2024-09-17 19:32:07,381 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 60 [2024-09-17 19:32:07,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:32:07,381 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2024-09-17 19:32:07,381 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, (11), 5 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-17 19:32:07,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:07,381 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2024-09-17 19:32:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-17 19:32:07,382 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:32:07,382 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-17 19:32:07,395 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 19:32:07,586 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:07,586 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:32:07,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1588805500, now seen corresponding path program 2 times [2024-09-17 19:32:07,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:32:07,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281890834] [2024-09-17 19:32:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:32:07,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:32:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:32:07,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912908625] [2024-09-17 19:32:07,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:32:07,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:07,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:32:07,635 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) [2024-09-17 19:32:07,637 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 19:32:07,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:32:07,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:32:07,752 WARN L260 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-09-17 19:32:07,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:32:07,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:07,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-17 19:32:07,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:32:07,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:07,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:07,787 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 [2024-09-17 19:32:08,765 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 [2024-09-17 19:32:08,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-17 19:32:08,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-17 19:32:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-17 19:32:08,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:32:14,883 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|))) (let ((.cse0 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_13| Int)) (= (+ (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_15|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_15|) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_13|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_15|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_15|)) (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_13|)))) (.cse3 (select .cse2 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|))) (and (or .cse0 (= (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|) 1)) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_13| Int)) (let ((.cse1 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_15|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_15|)) (.cse4 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_13|))) (or (not (= (+ (* (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_13|) .cse1) (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse2 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| (+ .cse3 1))) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_15|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_15|)) .cse4)) (= (+ (* .cse1 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_13|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_15|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_15|)) .cse4)))) (or .cse0 (= (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|) (+ (* (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|) |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|) (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|)) .cse3 1)))))) is different from false [2024-09-17 19:32:15,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:32:15,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281890834] [2024-09-17 19:32:15,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:32:15,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912908625] [2024-09-17 19:32:15,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912908625] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:32:15,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:32:15,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-17 19:32:15,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017817545] [2024-09-17 19:32:15,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:32:15,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-17 19:32:15,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:32:15,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-17 19:32:15,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=676, Unknown=1, NotChecked=52, Total=812 [2024-09-17 19:32:15,299 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-17 19:32:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:32:16,365 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-09-17 19:32:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 19:32:16,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 60 [2024-09-17 19:32:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:32:16,367 INFO L225 Difference]: With dead ends: 62 [2024-09-17 19:32:16,367 INFO L226 Difference]: Without dead ends: 56 [2024-09-17 19:32:16,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=158, Invalid=1327, Unknown=1, NotChecked=74, Total=1560 [2024-09-17 19:32:16,368 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 19:32:16,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 114 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 19:32:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-17 19:32:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-09-17 19:32:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-17 19:32:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2024-09-17 19:32:16,384 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 60 [2024-09-17 19:32:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:32:16,384 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2024-09-17 19:32:16,384 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-17 19:32:16,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2024-09-17 19:32:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-17 19:32:16,385 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:32:16,385 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:32:16,398 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-17 19:32:16,585 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:16,586 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:32:16,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:16,586 INFO L85 PathProgramCache]: Analyzing trace with hash -742771557, now seen corresponding path program 3 times [2024-09-17 19:32:16,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:32:16,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756130942] [2024-09-17 19:32:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:32:16,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:32:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:32:16,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929021198] [2024-09-17 19:32:16,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:32:16,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:16,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:32:16,652 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) [2024-09-17 19:32:16,654 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 19:32:16,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 19:32:16,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:32:16,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 216 conjuncts are in the unsatisfiable core [2024-09-17 19:32:16,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:32:16,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:16,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:16,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:16,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:32:16,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:32:16,911 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 [2024-09-17 19:32:17,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-17 19:32:17,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-09-17 19:32:18,099 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 [2024-09-17 19:32:18,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-17 19:32:18,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-17 19:32:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-17 19:32:18,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:32:24,526 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|))) (let ((.cse0 (select .cse4 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|)) (.cse1 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_20| Int)) (= (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_20|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_20|) (+ (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_22|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_20|) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_18|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_18|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_22|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_22|)))))) (and (or (= (+ (* (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|) |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|) (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|)) .cse0 2) (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|)) .cse1) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_18| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_20| Int)) (let ((.cse2 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_20|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_20|)) (.cse3 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_22|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_20|))) (or (= .cse2 (+ (* .cse3 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_18|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_18|)) (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_22|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_22|))) (not (= .cse2 (+ (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse4 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| (+ .cse0 2))) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_22|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_22|) (* .cse3 (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_18|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_18|)))))))) (or .cse1 (= 2 (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|)))))) is different from false [2024-09-17 19:32:25,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:32:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756130942] [2024-09-17 19:32:25,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:32:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929021198] [2024-09-17 19:32:25,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929021198] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:32:25,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:32:25,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-17 19:32:25,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095581757] [2024-09-17 19:32:25,001 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:32:25,002 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-17 19:32:25,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:32:25,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-17 19:32:25,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=904, Unknown=1, NotChecked=60, Total=1056 [2024-09-17 19:32:25,003 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 26 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 11 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-17 19:32:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:32:26,352 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2024-09-17 19:32:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-17 19:32:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 11 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 73 [2024-09-17 19:32:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:32:26,354 INFO L225 Difference]: With dead ends: 64 [2024-09-17 19:32:26,354 INFO L226 Difference]: Without dead ends: 58 [2024-09-17 19:32:26,355 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=199, Invalid=1966, Unknown=1, NotChecked=90, Total=2256 [2024-09-17 19:32:26,355 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-17 19:32:26,355 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 174 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-17 19:32:26,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-17 19:32:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-09-17 19:32:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2024-09-17 19:32:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2024-09-17 19:32:26,376 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 73 [2024-09-17 19:32:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:32:26,376 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2024-09-17 19:32:26,376 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 11 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-17 19:32:26,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2024-09-17 19:32:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-17 19:32:26,380 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:32:26,381 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:32:26,395 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-17 19:32:26,584 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:26,585 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:32:26,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1760672172, now seen corresponding path program 4 times [2024-09-17 19:32:26,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:32:26,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544258302] [2024-09-17 19:32:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:32:26,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:32:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:32:26,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630524846] [2024-09-17 19:32:26,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:32:26,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:26,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:32:26,627 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) [2024-09-17 19:32:26,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 19:32:26,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:32:26,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:32:26,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-09-17 19:32:26,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:32:26,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:32:26,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:32:26,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:26,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:32:27,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:32:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-09-17 19:32:27,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:32:28,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:32:28,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544258302] [2024-09-17 19:32:28,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:32:28,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630524846] [2024-09-17 19:32:28,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630524846] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:32:28,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:32:28,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-17 19:32:28,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032213053] [2024-09-17 19:32:28,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:32:28,567 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 19:32:28,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:32:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 19:32:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-09-17 19:32:28,568 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-17 19:32:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:32:29,165 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-17 19:32:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 19:32:29,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 86 [2024-09-17 19:32:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:32:29,166 INFO L225 Difference]: With dead ends: 66 [2024-09-17 19:32:29,166 INFO L226 Difference]: Without dead ends: 60 [2024-09-17 19:32:29,166 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:32:29,166 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 19:32:29,167 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 131 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 19:32:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-17 19:32:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2024-09-17 19:32:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 10 states have call successors, (10), 9 states have call predecessors, (10), 11 states have return successors, (18), 11 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-17 19:32:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2024-09-17 19:32:29,188 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 86 [2024-09-17 19:32:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:32:29,189 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2024-09-17 19:32:29,189 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-17 19:32:29,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2024-09-17 19:32:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-17 19:32:29,189 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:32:29,189 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:32:29,206 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-17 19:32:29,390 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-17 19:32:29,390 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:32:29,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:29,391 INFO L85 PathProgramCache]: Analyzing trace with hash 104908723, now seen corresponding path program 5 times [2024-09-17 19:32:29,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:32:29,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322662341] [2024-09-17 19:32:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:32:29,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:32:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:32:29,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279004759] [2024-09-17 19:32:29,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:32:29,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:29,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:32:29,432 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) [2024-09-17 19:32:29,432 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 19:32:29,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-17 19:32:29,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:32:29,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 167 conjuncts are in the unsatisfiable core [2024-09-17 19:32:29,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:32:29,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:29,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:32:29,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:32:29,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:32:30,499 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 [2024-09-17 19:32:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-09-17 19:32:30,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:32:31,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:32:31,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322662341] [2024-09-17 19:32:31,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:32:31,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279004759] [2024-09-17 19:32:31,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279004759] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:32:31,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:32:31,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-17 19:32:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60799806] [2024-09-17 19:32:31,504 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:32:31,505 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 19:32:31,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:32:31,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 19:32:31,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2024-09-17 19:32:31,505 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 20 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-17 19:32:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:32:32,120 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-09-17 19:32:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 19:32:32,121 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) Word has length 99 [2024-09-17 19:32:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:32:32,122 INFO L225 Difference]: With dead ends: 68 [2024-09-17 19:32:32,123 INFO L226 Difference]: Without dead ends: 62 [2024-09-17 19:32:32,123 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2024-09-17 19:32:32,124 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:32:32,124 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 154 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 19:32:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-17 19:32:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-09-17 19:32:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (20), 12 states have call predecessors, (20), 8 states have call successors, (20) [2024-09-17 19:32:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2024-09-17 19:32:32,154 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 99 [2024-09-17 19:32:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:32:32,155 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2024-09-17 19:32:32,155 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-17 19:32:32,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2024-09-17 19:32:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-17 19:32:32,156 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:32:32,156 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:32:32,169 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-17 19:32:32,356 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-17 19:32:32,356 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:32:32,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1369950782, now seen corresponding path program 1 times [2024-09-17 19:32:32,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:32:32,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103591848] [2024-09-17 19:32:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:32:32,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:32:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:32:32,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140890518] [2024-09-17 19:32:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:32:32,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:32,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:32:32,381 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) [2024-09-17 19:32:32,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 19:32:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:32,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-09-17 19:32:32,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:32:32,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-17 19:32:32,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:32,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:32:32,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:32:32,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:33,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-17 19:32:33,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-17 19:32:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-17 19:32:33,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:32:35,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:32:35,041 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 50 treesize of output 53 [2024-09-17 19:32:35,046 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 50 treesize of output 46 [2024-09-17 19:32:35,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:32:35,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103591848] [2024-09-17 19:32:35,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:32:35,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140890518] [2024-09-17 19:32:35,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140890518] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:32:35,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:32:35,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-17 19:32:35,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320515224] [2024-09-17 19:32:35,206 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:32:35,206 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 19:32:35,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:32:35,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 19:32:35,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:32:35,207 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-17 19:32:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:32:36,096 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2024-09-17 19:32:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-17 19:32:36,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 60 [2024-09-17 19:32:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:32:36,098 INFO L225 Difference]: With dead ends: 72 [2024-09-17 19:32:36,098 INFO L226 Difference]: Without dead ends: 66 [2024-09-17 19:32:36,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 19:32:36,099 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 19:32:36,099 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 145 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 19:32:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-17 19:32:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2024-09-17 19:32:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (20), 12 states have call predecessors, (20), 8 states have call successors, (20) [2024-09-17 19:32:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2024-09-17 19:32:36,128 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 60 [2024-09-17 19:32:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:32:36,129 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2024-09-17 19:32:36,129 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-17 19:32:36,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2024-09-17 19:32:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 19:32:36,130 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:32:36,130 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:32:36,147 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-17 19:32:36,337 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:36,337 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:32:36,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:36,338 INFO L85 PathProgramCache]: Analyzing trace with hash -58967764, now seen corresponding path program 6 times [2024-09-17 19:32:36,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:32:36,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442170111] [2024-09-17 19:32:36,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:32:36,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:32:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:32:36,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20903387] [2024-09-17 19:32:36,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:32:36,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:36,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:32:36,389 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) [2024-09-17 19:32:36,390 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 19:32:36,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-17 19:32:36,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:32:36,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 312 conjuncts are in the unsatisfiable core [2024-09-17 19:32:36,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:32:36,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:36,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-17 19:32:36,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:36,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:32:36,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:32:36,794 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 [2024-09-17 19:32:37,096 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 14 treesize of output 10 [2024-09-17 19:32:37,382 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 14 treesize of output 10 [2024-09-17 19:32:37,540 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 14 treesize of output 10 [2024-09-17 19:32:37,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-09-17 19:32:37,870 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 14 treesize of output 10 [2024-09-17 19:32:38,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-09-17 19:32:38,948 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 [2024-09-17 19:32:39,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:32:39,066 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 72 treesize of output 44 [2024-09-17 19:32:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 18 proven. 117 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 19:32:39,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:32:48,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:32:48,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442170111] [2024-09-17 19:32:48,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:32:48,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20903387] [2024-09-17 19:32:48,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20903387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:32:48,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:32:48,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2024-09-17 19:32:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32678879] [2024-09-17 19:32:48,475 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:32:48,475 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-17 19:32:48,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:32:48,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-17 19:32:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1352, Unknown=1, NotChecked=0, Total=1482 [2024-09-17 19:32:48,476 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 32 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 28 states have internal predecessors, (42), 11 states have call successors, (12), 4 states have call predecessors, (12), 11 states have return successors, (14), 13 states have call predecessors, (14), 10 states have call successors, (14) [2024-09-17 19:32:52,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:32:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:32:54,132 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2024-09-17 19:32:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-17 19:32:54,133 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 28 states have internal predecessors, (42), 11 states have call successors, (12), 4 states have call predecessors, (12), 11 states have return successors, (14), 13 states have call predecessors, (14), 10 states have call successors, (14) Word has length 112 [2024-09-17 19:32:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:32:54,134 INFO L225 Difference]: With dead ends: 72 [2024-09-17 19:32:54,134 INFO L226 Difference]: Without dead ends: 66 [2024-09-17 19:32:54,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=204, Invalid=2147, Unknown=1, NotChecked=0, Total=2352 [2024-09-17 19:32:54,135 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:32:54,135 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 281 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 857 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2024-09-17 19:32:54,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-17 19:32:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-09-17 19:32:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 10 states have call successors, (10), 9 states have call predecessors, (10), 13 states have return successors, (22), 13 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-17 19:32:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2024-09-17 19:32:54,157 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 112 [2024-09-17 19:32:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:32:54,157 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2024-09-17 19:32:54,157 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 28 states have internal predecessors, (42), 11 states have call successors, (12), 4 states have call predecessors, (12), 11 states have return successors, (14), 13 states have call predecessors, (14), 10 states have call successors, (14) [2024-09-17 19:32:54,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2024-09-17 19:32:54,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 19:32:54,158 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:32:54,158 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:32:54,184 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-17 19:32:54,359 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-17 19:32:54,359 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:32:54,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:32:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash -946190610, now seen corresponding path program 2 times [2024-09-17 19:32:54,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:32:54,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260743098] [2024-09-17 19:32:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:32:54,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:32:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:55,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:32:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:55,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:32:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:55,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:32:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:55,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:32:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:56,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:32:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:56,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:32:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:56,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:32:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:56,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:32:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:56,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:32:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:56,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:32:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:57,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:32:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:57,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:32:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:57,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:32:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:57,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:32:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:57,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:32:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:57,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:32:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:57,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:32:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:32:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 61 proven. 85 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2024-09-17 19:32:57,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:32:57,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260743098] [2024-09-17 19:32:57,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260743098] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:32:57,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75036691] [2024-09-17 19:32:57,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:32:57,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:32:57,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:32:57,310 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) [2024-09-17 19:32:57,311 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 19:32:57,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:32:57,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:32:57,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-17 19:32:57,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:32:57,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:32:57,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:32:57,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-17 19:32:57,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-09-17 19:32:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 43 proven. 93 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2024-09-17 19:32:58,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:32:58,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-17 19:32:59,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-17 19:32:59,163 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 14 treesize of output 10 [2024-09-17 19:32:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 42 proven. 126 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-09-17 19:32:59,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75036691] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:32:59,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:32:59,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 20] total 42 [2024-09-17 19:32:59,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786170628] [2024-09-17 19:32:59,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:32:59,783 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-17 19:32:59,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:32:59,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-17 19:32:59,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 19:32:59,784 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 42 states, 30 states have (on average 2.466666666666667) internal successors, (74), 36 states have internal predecessors, (74), 21 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (26), 17 states have call predecessors, (26), 20 states have call successors, (26) [2024-09-17 19:33:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:33:03,331 INFO L93 Difference]: Finished difference Result 188 states and 285 transitions. [2024-09-17 19:33:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-17 19:33:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 30 states have (on average 2.466666666666667) internal successors, (74), 36 states have internal predecessors, (74), 21 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (26), 17 states have call predecessors, (26), 20 states have call successors, (26) Word has length 112 [2024-09-17 19:33:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:33:03,333 INFO L225 Difference]: With dead ends: 188 [2024-09-17 19:33:03,333 INFO L226 Difference]: Without dead ends: 137 [2024-09-17 19:33:03,334 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1075, Invalid=6235, Unknown=0, NotChecked=0, Total=7310 [2024-09-17 19:33:03,335 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 199 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:33:03,335 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 402 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-17 19:33:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-17 19:33:03,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2024-09-17 19:33:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 62 states have internal predecessors, (64), 14 states have call successors, (14), 11 states have call predecessors, (14), 24 states have return successors, (40), 24 states have call predecessors, (40), 12 states have call successors, (40) [2024-09-17 19:33:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2024-09-17 19:33:03,396 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 112 [2024-09-17 19:33:03,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:33:03,397 INFO L474 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2024-09-17 19:33:03,397 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 30 states have (on average 2.466666666666667) internal successors, (74), 36 states have internal predecessors, (74), 21 states have call successors, (28), 8 states have call predecessors, (28), 9 states have return successors, (26), 17 states have call predecessors, (26), 20 states have call successors, (26) [2024-09-17 19:33:03,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2024-09-17 19:33:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-17 19:33:03,398 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:33:03,398 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:33:03,412 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-17 19:33:03,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-17 19:33:03,599 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:33:03,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:03,599 INFO L85 PathProgramCache]: Analyzing trace with hash -608758051, now seen corresponding path program 3 times [2024-09-17 19:33:03,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:33:03,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578702085] [2024-09-17 19:33:03,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:33:03,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:33:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:33:03,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823946459] [2024-09-17 19:33:03,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:33:03,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:33:03,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:33:03,636 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) [2024-09-17 19:33:03,637 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-17 19:33:03,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 19:33:03,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:33:03,842 WARN L260 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 259 conjuncts are in the unsatisfiable core [2024-09-17 19:33:03,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:33:03,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:03,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:03,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-17 19:33:03,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:33:03,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:03,926 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 [2024-09-17 19:33:04,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-17 19:33:05,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-17 19:33:05,436 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 [2024-09-17 19:33:05,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-17 19:33:05,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-09-17 19:33:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-17 19:33:05,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:33:08,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:33:08,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578702085] [2024-09-17 19:33:08,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:33:08,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823946459] [2024-09-17 19:33:08,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823946459] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:33:08,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:33:08,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-17 19:33:08,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950752853] [2024-09-17 19:33:08,831 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:33:08,831 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-17 19:33:08,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:33:08,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-17 19:33:08,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:33:08,832 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-17 19:33:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:33:10,274 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2024-09-17 19:33:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 19:33:10,275 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2024-09-17 19:33:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:33:10,277 INFO L225 Difference]: With dead ends: 112 [2024-09-17 19:33:10,277 INFO L226 Difference]: Without dead ends: 106 [2024-09-17 19:33:10,279 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 19:33:10,280 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-17 19:33:10,280 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 165 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-17 19:33:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-17 19:33:10,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2024-09-17 19:33:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 62 states have internal predecessors, (64), 14 states have call successors, (14), 11 states have call predecessors, (14), 24 states have return successors, (40), 24 states have call predecessors, (40), 12 states have call successors, (40) [2024-09-17 19:33:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2024-09-17 19:33:10,333 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 73 [2024-09-17 19:33:10,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:33:10,333 INFO L474 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2024-09-17 19:33:10,333 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-17 19:33:10,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:10,333 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2024-09-17 19:33:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-17 19:33:10,334 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:33:10,334 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:33:10,352 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-17 19:33:10,534 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-17 19:33:10,534 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:33:10,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash 101233945, now seen corresponding path program 4 times [2024-09-17 19:33:10,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:33:10,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898429262] [2024-09-17 19:33:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:33:10,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:33:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:33:10,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640174082] [2024-09-17 19:33:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:33:10,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:33:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:33:10,556 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) [2024-09-17 19:33:10,559 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-17 19:33:10,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:33:10,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:33:10,793 WARN L260 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 239 conjuncts are in the unsatisfiable core [2024-09-17 19:33:10,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:33:10,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:10,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:33:10,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:10,845 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 [2024-09-17 19:33:11,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2024-09-17 19:33:11,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-09-17 19:33:12,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-17 19:33:12,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-09-17 19:33:12,241 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 14 treesize of output 10 [2024-09-17 19:33:13,028 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 [2024-09-17 19:33:13,037 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-17 19:33:13,037 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 3 [2024-09-17 19:33:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 43 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-17 19:33:13,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:33:18,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:33:18,255 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 99 treesize of output 86 [2024-09-17 19:33:18,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:33:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898429262] [2024-09-17 19:33:18,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:33:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640174082] [2024-09-17 19:33:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640174082] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:33:18,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:33:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-17 19:33:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903343997] [2024-09-17 19:33:18,564 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:33:18,564 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 19:33:18,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:33:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 19:33:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2024-09-17 19:33:18,565 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand has 27 states, 20 states have (on average 1.9) internal successors, (38), 24 states have internal predecessors, (38), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-17 19:33:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:33:20,690 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2024-09-17 19:33:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 19:33:20,691 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 1.9) internal successors, (38), 24 states have internal predecessors, (38), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 73 [2024-09-17 19:33:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:33:20,692 INFO L225 Difference]: With dead ends: 112 [2024-09-17 19:33:20,692 INFO L226 Difference]: Without dead ends: 106 [2024-09-17 19:33:20,692 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 19:33:20,692 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:33:20,693 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 176 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-17 19:33:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-17 19:33:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2024-09-17 19:33:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 64 states have internal predecessors, (66), 14 states have call successors, (14), 11 states have call predecessors, (14), 26 states have return successors, (43), 26 states have call predecessors, (43), 12 states have call successors, (43) [2024-09-17 19:33:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2024-09-17 19:33:20,753 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 73 [2024-09-17 19:33:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:33:20,753 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2024-09-17 19:33:20,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 1.9) internal successors, (38), 24 states have internal predecessors, (38), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-17 19:33:20,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2024-09-17 19:33:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-17 19:33:20,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:33:20,756 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:33:20,770 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-17 19:33:20,958 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-17 19:33:20,958 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:33:20,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:20,959 INFO L85 PathProgramCache]: Analyzing trace with hash 585988981, now seen corresponding path program 5 times [2024-09-17 19:33:20,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:33:20,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52013247] [2024-09-17 19:33:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:33:20,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:33:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:33:20,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412792603] [2024-09-17 19:33:20,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:33:20,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:33:20,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:33:20,992 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:33:20,994 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-17 19:33:21,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-17 19:33:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:33:21,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 317 conjuncts are in the unsatisfiable core [2024-09-17 19:33:21,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:33:21,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:21,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-17 19:33:21,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:33:21,380 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 [2024-09-17 19:33:22,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:22,218 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 [2024-09-17 19:33:23,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-17 19:33:23,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-09-17 19:33:23,938 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 [2024-09-17 19:33:24,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-17 19:33:24,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-17 19:33:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 44 proven. 89 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-17 19:33:24,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:33:28,613 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 76 treesize of output 72 [2024-09-17 19:33:28,617 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 122 treesize of output 114 [2024-09-17 19:33:28,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:33:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52013247] [2024-09-17 19:33:28,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:33:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412792603] [2024-09-17 19:33:28,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412792603] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:33:28,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:33:28,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2024-09-17 19:33:28,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401838535] [2024-09-17 19:33:28,958 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:33:28,959 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-17 19:33:28,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:33:28,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-17 19:33:28,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 19:33:28,959 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 38 states, 30 states have (on average 1.5) internal successors, (45), 33 states have internal predecessors, (45), 13 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-17 19:33:33,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-17 19:33:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:33:35,426 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2024-09-17 19:33:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 19:33:35,427 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 1.5) internal successors, (45), 33 states have internal predecessors, (45), 13 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 99 [2024-09-17 19:33:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:33:35,428 INFO L225 Difference]: With dead ends: 118 [2024-09-17 19:33:35,428 INFO L226 Difference]: Without dead ends: 112 [2024-09-17 19:33:35,428 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 52 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=311, Invalid=2995, Unknown=0, NotChecked=0, Total=3306 [2024-09-17 19:33:35,429 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:33:35,429 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 270 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1132 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-09-17 19:33:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-17 19:33:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2024-09-17 19:33:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 66 states have internal predecessors, (68), 14 states have call successors, (14), 11 states have call predecessors, (14), 28 states have return successors, (45), 28 states have call predecessors, (45), 12 states have call successors, (45) [2024-09-17 19:33:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2024-09-17 19:33:35,495 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 99 [2024-09-17 19:33:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:33:35,495 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2024-09-17 19:33:35,496 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 1.5) internal successors, (45), 33 states have internal predecessors, (45), 13 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-17 19:33:35,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:35,496 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2024-09-17 19:33:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-17 19:33:35,496 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:33:35,497 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:33:35,511 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-17 19:33:35,700 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:33:35,701 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:33:35,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:35,701 INFO L85 PathProgramCache]: Analyzing trace with hash 533093464, now seen corresponding path program 6 times [2024-09-17 19:33:35,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:33:35,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299216498] [2024-09-17 19:33:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:33:35,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:33:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:33:35,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430771746] [2024-09-17 19:33:35,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:33:35,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:33:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:33:35,748 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:33:35,751 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-17 19:33:36,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-17 19:33:36,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:33:36,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 261 conjuncts are in the unsatisfiable core [2024-09-17 19:33:36,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:33:36,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:36,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-17 19:33:36,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:36,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:33:36,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:36,131 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 [2024-09-17 19:33:36,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-17 19:33:36,760 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 17 treesize of output 9 [2024-09-17 19:33:37,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-17 19:33:37,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-17 19:33:37,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-17 19:33:37,426 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 [2024-09-17 19:33:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-17 19:33:37,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:33:39,448 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 14 treesize of output 10 [2024-09-17 19:33:44,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:33:44,328 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 320 treesize of output 315 [2024-09-17 19:33:45,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:33:45,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299216498] [2024-09-17 19:33:45,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:33:45,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430771746] [2024-09-17 19:33:45,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430771746] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:33:45,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:33:45,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-17 19:33:45,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403522967] [2024-09-17 19:33:45,187 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:33:45,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 19:33:45,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:33:45,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 19:33:45,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 19:33:45,188 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 27 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 23 states have internal predecessors, (40), 11 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2024-09-17 19:33:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:33:46,467 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2024-09-17 19:33:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-17 19:33:46,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 23 states have internal predecessors, (40), 11 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 86 [2024-09-17 19:33:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:33:46,469 INFO L225 Difference]: With dead ends: 122 [2024-09-17 19:33:46,469 INFO L226 Difference]: Without dead ends: 116 [2024-09-17 19:33:46,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=159, Invalid=1647, Unknown=0, NotChecked=0, Total=1806 [2024-09-17 19:33:46,469 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-17 19:33:46,470 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-17 19:33:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-17 19:33:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 106. [2024-09-17 19:33:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 66 states have internal predecessors, (68), 14 states have call successors, (14), 11 states have call predecessors, (14), 28 states have return successors, (45), 28 states have call predecessors, (45), 12 states have call successors, (45) [2024-09-17 19:33:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2024-09-17 19:33:46,552 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 86 [2024-09-17 19:33:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:33:46,553 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2024-09-17 19:33:46,553 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 23 states have internal predecessors, (40), 11 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2024-09-17 19:33:46,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2024-09-17 19:33:46,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-17 19:33:46,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:33:46,554 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:33:46,569 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-17 19:33:46,758 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-17 19:33:46,759 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:33:46,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:46,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1822711786, now seen corresponding path program 7 times [2024-09-17 19:33:46,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:33:46,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913150500] [2024-09-17 19:33:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:33:46,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:33:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:33:46,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757192260] [2024-09-17 19:33:46,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 19:33:46,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:33:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:33:46,788 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:33:46,790 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-17 19:33:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:33:47,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 268 conjuncts are in the unsatisfiable core [2024-09-17 19:33:47,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:33:47,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-17 19:33:47,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-17 19:33:47,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-17 19:33:47,067 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 [2024-09-17 19:33:47,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:48,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-17 19:33:48,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-17 19:33:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-17 19:33:48,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:33:51,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:33:51,602 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 50 treesize of output 53 [2024-09-17 19:33:51,614 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 50 treesize of output 46 [2024-09-17 19:33:51,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:33:51,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913150500] [2024-09-17 19:33:51,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:33:51,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757192260] [2024-09-17 19:33:51,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757192260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:33:51,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:33:51,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-17 19:33:51,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676597501] [2024-09-17 19:33:51,788 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:33:51,788 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-17 19:33:51,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:33:51,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-17 19:33:51,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2024-09-17 19:33:51,789 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 26 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-17 19:33:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:33:52,921 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2024-09-17 19:33:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-17 19:33:52,921 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 86 [2024-09-17 19:33:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:33:52,922 INFO L225 Difference]: With dead ends: 140 [2024-09-17 19:33:52,922 INFO L226 Difference]: Without dead ends: 134 [2024-09-17 19:33:52,923 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 19:33:52,923 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 19:33:52,923 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 169 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 19:33:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-17 19:33:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 106. [2024-09-17 19:33:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 66 states have internal predecessors, (68), 14 states have call successors, (14), 11 states have call predecessors, (14), 28 states have return successors, (45), 28 states have call predecessors, (45), 12 states have call successors, (45) [2024-09-17 19:33:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2024-09-17 19:33:52,991 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 86 [2024-09-17 19:33:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:33:52,991 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2024-09-17 19:33:52,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-17 19:33:52,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2024-09-17 19:33:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-17 19:33:52,992 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:33:52,992 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:33:53,006 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-17 19:33:53,192 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:33:53,193 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:33:53,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:53,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1874763602, now seen corresponding path program 8 times [2024-09-17 19:33:53,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:33:53,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114444797] [2024-09-17 19:33:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:33:53,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:33:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 19:33:53,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79170527] [2024-09-17 19:33:53,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:33:53,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:33:53,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:33:53,218 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:33:53,223 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-17 19:33:53,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:33:53,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:33:53,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 200 conjuncts are in the unsatisfiable core [2024-09-17 19:33:53,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:33:53,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:53,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2024-09-17 19:33:53,902 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 17 treesize of output 9 [2024-09-17 19:33:54,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2024-09-17 19:33:54,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-09-17 19:33:54,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-17 19:33:54,195 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 [2024-09-17 19:33:54,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-17 19:33:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-09-17 19:33:54,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:33:56,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:33:56,245 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 63 treesize of output 66 [2024-09-17 19:33:56,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-17 19:33:56,255 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 78 treesize of output 77 [2024-09-17 19:33:56,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:33:56,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114444797] [2024-09-17 19:33:56,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 19:33:56,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79170527] [2024-09-17 19:33:56,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79170527] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:33:56,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:33:56,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-17 19:33:56,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472000298] [2024-09-17 19:33:56,346 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 19:33:56,346 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 19:33:56,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:33:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 19:33:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-09-17 19:33:56,347 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 19:33:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:33:56,919 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2024-09-17 19:33:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 19:33:56,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 86 [2024-09-17 19:33:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:33:56,920 INFO L225 Difference]: With dead ends: 106 [2024-09-17 19:33:56,920 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 19:33:56,920 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2024-09-17 19:33:56,921 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:33:56,921 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 82 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:33:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 19:33:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 19:33:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:33:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 19:33:56,922 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2024-09-17 19:33:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:33:56,922 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 19:33:56,922 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 19:33:56,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:33:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 19:33:56,925 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 19:33:56,931 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-17 19:33:56,951 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-17 19:33:57,135 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:33:57,140 INFO L408 BasicCegarLoop]: Path program histogram: [8, 6, 2, 1, 1, 1, 1] [2024-09-17 19:33:57,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-17 19:34:13,379 WARN L293 SmtUtils]: Spent 14.56s on a formula simplification. DAG size of input: 475 DAG size of output: 918 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-17 19:34:22,324 WARN L293 SmtUtils]: Spent 8.94s on a formula simplification. DAG size of input: 401 DAG size of output: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-17 19:34:34,647 WARN L293 SmtUtils]: Spent 12.32s on a formula simplification. DAG size of input: 472 DAG size of output: 826 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-17 19:34:53,469 WARN L293 SmtUtils]: Spent 14.32s on a formula simplification. DAG size of input: 475 DAG size of output: 918 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-17 19:35:02,640 WARN L293 SmtUtils]: Spent 9.17s on a formula simplification. DAG size of input: 401 DAG size of output: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-17 19:35:15,208 WARN L293 SmtUtils]: Spent 12.57s on a formula simplification. DAG size of input: 472 DAG size of output: 826 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-09-17 19:35:35,337 WARN L293 SmtUtils]: Spent 17.06s on a formula simplification. DAG size of input: 120 DAG size of output: 82 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter)