./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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_fermat1-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 --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-ca4ee3d-m [2024-09-20 19:58:02,202 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:58:02,280 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:58:02,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:58:02,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:58:02,323 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:58:02,325 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:58:02,326 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:58:02,326 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:58:02,330 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:58:02,330 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:58:02,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:58:02,331 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:58:02,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:58:02,332 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:58:02,332 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:58:02,332 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:58:02,333 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:58:02,333 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:58:02,333 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:58:02,333 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:58:02,336 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:58:02,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:58:02,336 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:58:02,337 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:58:02,337 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:58:02,337 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:58:02,337 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:58:02,338 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:58:02,338 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:58:02,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:58:02,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:58:02,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:58:02,340 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:58:02,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:58:02,340 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:58:02,341 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:58:02,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:58:02,341 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:58:02,342 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:58:02,342 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:58:02,345 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:58:02,345 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82b98e74657ce84706a43470df686c21fc227d1db1df507636ad5f146dee0144 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:58:02,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:58:02,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:58:02,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:58:02,649 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:58:02,649 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:58:02,650 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2024-09-20 19:58:04,104 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:58:04,308 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:58:04,309 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat1-ll.c [2024-09-20 19:58:04,319 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6ae64224d/f01210d6bb544092a40e576b29b13ced/FLAG46fbaaf71 [2024-09-20 19:58:04,685 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6ae64224d/f01210d6bb544092a40e576b29b13ced [2024-09-20 19:58:04,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:58:04,688 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:58:04,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:58:04,690 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:58:04,694 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:58:04,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:04,695 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3caed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04, skipping insertion in model container [2024-09-20 19:58:04,695 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:04,719 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:58:04,877 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_fermat1-ll.c[1101,1114] [2024-09-20 19:58:04,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:58:04,932 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:58:04,943 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_fermat1-ll.c[1101,1114] [2024-09-20 19:58:04,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:58:04,987 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:58:04,988 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04 WrapperNode [2024-09-20 19:58:04,988 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:58:04,989 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:58:04,989 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:58:04,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:58:04,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,007 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,015 INFO L138 Inliner]: procedures = 18, calls = 82, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:58:05,015 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:58:05,016 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:58:05,016 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:58:05,016 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:58:05,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,031 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,053 INFO L175 MemorySlicer]: Split 53 memory accesses to 5 slices as follows [2, 16, 16, 8, 11]. 30 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 2, 2, 1, 3]. [2024-09-20 19:58:05,053 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,053 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,060 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,062 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,063 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,065 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,067 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:58:05,068 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:58:05,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:58:05,069 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:58:05,070 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (1/1) ... [2024-09-20 19:58:05,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:58:05,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:58:05,101 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) [2024-09-20 19:58:05,105 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 [2024-09-20 19:58:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:58:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_36_0 [2024-09-20 19:58:05,143 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_36_0 [2024-09-20 19:58:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:58:05,143 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:58:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:58:05,143 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:58:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:58:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 19:58:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 19:58:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 19:58:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 19:58:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 19:58:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 19:58:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 19:58:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 19:58:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 19:58:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 19:58:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_43_0 [2024-09-20 19:58:05,146 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_43_0 [2024-09-20 19:58:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:58:05,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:58:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_46_to_51_0 [2024-09-20 19:58:05,146 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_46_to_51_0 [2024-09-20 19:58:05,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:58:05,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:58:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 19:58:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 19:58:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 19:58:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 19:58:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 19:58:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:58:05,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:58:05,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 19:58:05,249 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:58:05,251 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:58:05,516 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-20 19:58:05,516 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:58:05,545 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:58:05,547 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-20 19:58:05,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:58:05 BoogieIcfgContainer [2024-09-20 19:58:05,548 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:58:05,551 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:58:05,552 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:58:05,555 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:58:05,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:58:04" (1/3) ... [2024-09-20 19:58:05,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fad36ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:58:05, skipping insertion in model container [2024-09-20 19:58:05,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:58:04" (2/3) ... [2024-09-20 19:58:05,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fad36ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:58:05, skipping insertion in model container [2024-09-20 19:58:05,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:58:05" (3/3) ... [2024-09-20 19:58:05,559 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat1-ll.c [2024-09-20 19:58:05,577 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:58:05,577 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:58:05,646 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:58:05,654 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;@375172ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:58:05,655 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:58:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 19:58:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 19:58:05,671 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:58:05,672 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] [2024-09-20 19:58:05,673 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:58:05,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1756339989, now seen corresponding path program 1 times [2024-09-20 19:58:05,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:58:05,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996481708] [2024-09-20 19:58:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:05,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:58:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:58:05,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639262095] [2024-09-20 19:58:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:05,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:58:05,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:58:05,907 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) [2024-09-20 19:58:05,908 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:58:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:06,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-20 19:58:06,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:58:06,128 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 [2024-09-20 19:58:06,158 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 [2024-09-20 19:58:06,171 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 21 treesize of output 15 [2024-09-20 19:58:06,182 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 [2024-09-20 19:58:06,488 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 39 treesize of output 31 [2024-09-20 19:58:06,519 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 [2024-09-20 19:58:06,533 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 56 treesize of output 32 [2024-09-20 19:58:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:58:06,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:58:06,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:58:06,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996481708] [2024-09-20 19:58:06,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:58:06,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639262095] [2024-09-20 19:58:06,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639262095] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:58:06,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:58:06,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 19:58:06,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076801043] [2024-09-20 19:58:06,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:58:06,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:58:06,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:58:06,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:58:06,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:58:06,706 INFO L87 Difference]: Start difference. First operand has 52 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 33 states have internal predecessors, (38), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 8 states, 6 states have (on average 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) [2024-09-20 19:58:07,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-20 19:58:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:58:08,119 INFO L93 Difference]: Finished difference Result 111 states and 156 transitions. [2024-09-20 19:58:08,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:58:08,122 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 [2024-09-20 19:58:08,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:58:08,131 INFO L225 Difference]: With dead ends: 111 [2024-09-20 19:58:08,132 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 19:58:08,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:58:08,139 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:58:08,139 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 316 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 19:58:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 19:58:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-09-20 19:58:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 39 states have internal predecessors, (40), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-20 19:58:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2024-09-20 19:58:08,203 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 24 [2024-09-20 19:58:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:58:08,203 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2024-09-20 19:58:08,204 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) [2024-09-20 19:58:08,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2024-09-20 19:58:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 19:58:08,206 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:58:08,207 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] [2024-09-20 19:58:08,226 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 19:58:08,411 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-20 19:58:08,412 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:58:08,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:08,413 INFO L85 PathProgramCache]: Analyzing trace with hash 454145308, now seen corresponding path program 1 times [2024-09-20 19:58:08,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:58:08,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925035003] [2024-09-20 19:58:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:08,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:58:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:58:08,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739015719] [2024-09-20 19:58:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:08,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:58:08,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:58:08,534 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) [2024-09-20 19:58:08,536 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:58:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:08,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-20 19:58:08,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:58:08,733 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 [2024-09-20 19:58:08,753 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 21 treesize of output 15 [2024-09-20 19:58:08,759 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 11 [2024-09-20 19:58:08,777 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 [2024-09-20 19:58:09,257 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 43 treesize of output 35 [2024-09-20 19:58:09,265 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 39 treesize of output 31 [2024-09-20 19:58:09,270 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 60 treesize of output 36 [2024-09-20 19:58:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:58:09,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:58:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:58:12,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:58:12,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925035003] [2024-09-20 19:58:12,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:58:12,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739015719] [2024-09-20 19:58:12,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739015719] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:58:12,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:58:12,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 17 [2024-09-20 19:58:12,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488392858] [2024-09-20 19:58:12,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:58:12,595 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:58:12,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:58:12,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:58:12,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:58:12,597 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:58:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:58:13,404 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2024-09-20 19:58:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:58:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-20 19:58:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:58:13,408 INFO L225 Difference]: With dead ends: 78 [2024-09-20 19:58:13,408 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 19:58:13,408 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:58:13,409 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 19:58:13,410 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 330 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 19:58:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 19:58:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-20 19:58:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 50 states have internal predecessors, (50), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-20 19:58:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2024-09-20 19:58:13,439 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 34 [2024-09-20 19:58:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:58:13,439 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2024-09-20 19:58:13,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:58:13,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:13,440 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2024-09-20 19:58:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 19:58:13,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:58:13,441 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] [2024-09-20 19:58:13,450 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:58:13,645 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:58:13,646 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:58:13,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1053338002, now seen corresponding path program 1 times [2024-09-20 19:58:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:58:13,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157609753] [2024-09-20 19:58:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:13,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:58:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:58:13,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811076652] [2024-09-20 19:58:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:13,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:58:13,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:58:13,729 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) [2024-09-20 19:58:13,731 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:58:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:13,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-20 19:58:13,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:58:13,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:58:13,954 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 21 treesize of output 15 [2024-09-20 19:58:13,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:58:14,015 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 27 [2024-09-20 19:58:14,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-20 19:58:14,414 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 91 treesize of output 55 [2024-09-20 19:58:14,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:58:14,450 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 61 treesize of output 57 [2024-09-20 19:58:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:58:14,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:58:24,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:58:24,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157609753] [2024-09-20 19:58:24,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:58:24,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811076652] [2024-09-20 19:58:24,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811076652] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:58:24,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:58:24,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-20 19:58:24,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730912802] [2024-09-20 19:58:24,182 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:58:24,183 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:58:24,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:58:24,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:58:24,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:58:24,184 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:58:28,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:58:32,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:58:37,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:58:41,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:58:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:58:41,883 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2024-09-20 19:58:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 19:58:41,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 34 [2024-09-20 19:58:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:58:41,886 INFO L225 Difference]: With dead ends: 98 [2024-09-20 19:58:41,886 INFO L226 Difference]: Without dead ends: 88 [2024-09-20 19:58:41,886 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2024-09-20 19:58:41,888 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 45 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:58:41,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 191 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 707 Invalid, 3 Unknown, 0 Unchecked, 17.3s Time] [2024-09-20 19:58:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-20 19:58:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2024-09-20 19:58:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 53 states have internal predecessors, (53), 18 states have call successors, (18), 12 states have call predecessors, (18), 13 states have return successors, (23), 15 states have call predecessors, (23), 16 states have call successors, (23) [2024-09-20 19:58:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2024-09-20 19:58:41,916 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 34 [2024-09-20 19:58:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:58:41,917 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2024-09-20 19:58:41,917 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:58:41,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2024-09-20 19:58:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 19:58:41,918 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:58:41,919 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:58:41,934 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 19:58:42,122 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-20 19:58:42,123 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:58:42,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1993728975, now seen corresponding path program 1 times [2024-09-20 19:58:42,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:58:42,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329853412] [2024-09-20 19:58:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:58:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:58:42,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941214377] [2024-09-20 19:58:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:42,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:58:42,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:58:42,219 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) [2024-09-20 19:58:42,222 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:58:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:42,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-09-20 19:58:42,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:58:42,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 19:58:42,371 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 [2024-09-20 19:58:42,377 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 21 treesize of output 15 [2024-09-20 19:58:42,382 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 [2024-09-20 19:58:42,638 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 31 [2024-09-20 19:58:42,852 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 43 treesize of output 35 [2024-09-20 19:58:42,859 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 39 treesize of output 31 [2024-09-20 19:58:42,865 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 60 treesize of output 36 [2024-09-20 19:58:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:58:42,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:59:03,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:59:03,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329853412] [2024-09-20 19:59:03,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:59:03,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941214377] [2024-09-20 19:59:03,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941214377] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:59:03,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:59:03,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-20 19:59:03,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522946693] [2024-09-20 19:59:03,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:59:03,154 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 19:59:03,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:59:03,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 19:59:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=253, Unknown=3, NotChecked=0, Total=306 [2024-09-20 19:59:03,158 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 19:59:04,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:59:06,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:59:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:59:07,646 INFO L93 Difference]: Finished difference Result 164 states and 208 transitions. [2024-09-20 19:59:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:59:07,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-09-20 19:59:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:59:07,649 INFO L225 Difference]: With dead ends: 164 [2024-09-20 19:59:07,649 INFO L226 Difference]: Without dead ends: 162 [2024-09-20 19:59:07,650 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=139, Invalid=560, Unknown=3, NotChecked=0, Total=702 [2024-09-20 19:59:07,651 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 122 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 81 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:59:07,651 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 182 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 420 Invalid, 5 Unknown, 0 Unchecked, 4.0s Time] [2024-09-20 19:59:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-20 19:59:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2024-09-20 19:59:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 93 states have (on average 1.1290322580645162) internal successors, (105), 101 states have internal predecessors, (105), 35 states have call successors, (35), 21 states have call predecessors, (35), 27 states have return successors, (59), 34 states have call predecessors, (59), 32 states have call successors, (59) [2024-09-20 19:59:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 199 transitions. [2024-09-20 19:59:07,726 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 199 transitions. Word has length 46 [2024-09-20 19:59:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:59:07,727 INFO L474 AbstractCegarLoop]: Abstraction has 156 states and 199 transitions. [2024-09-20 19:59:07,727 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (10), 7 states have call predecessors, (10), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 19:59:07,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 199 transitions. [2024-09-20 19:59:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 19:59:07,729 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:07,729 INFO L216 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:59:07,747 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:59:07,930 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:59:07,930 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:07,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:07,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1900943677, now seen corresponding path program 1 times [2024-09-20 19:59:07,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:07,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232550778] [2024-09-20 19:59:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:07,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:08,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:59:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:08,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:59:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:08,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:59:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:08,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 19:59:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:08,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 19:59:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:08,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:59:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:08,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 19:59:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:08,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:59:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 19:59:08,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:59:08,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232550778] [2024-09-20 19:59:08,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232550778] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:59:08,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:59:08,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-20 19:59:08,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348165147] [2024-09-20 19:59:08,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:59:08,949 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 19:59:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:59:08,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 19:59:08,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:59:08,951 INFO L87 Difference]: Start difference. First operand 156 states and 199 transitions. Second operand has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 19:59:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:59:09,510 INFO L93 Difference]: Finished difference Result 244 states and 315 transitions. [2024-09-20 19:59:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 19:59:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2024-09-20 19:59:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:59:09,513 INFO L225 Difference]: With dead ends: 244 [2024-09-20 19:59:09,514 INFO L226 Difference]: Without dead ends: 139 [2024-09-20 19:59:09,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:59:09,516 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:59:09,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 93 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:59:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-20 19:59:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-09-20 19:59:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 91 states have internal predecessors, (95), 30 states have call successors, (30), 20 states have call predecessors, (30), 23 states have return successors, (40), 27 states have call predecessors, (40), 27 states have call successors, (40) [2024-09-20 19:59:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 165 transitions. [2024-09-20 19:59:09,603 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 165 transitions. Word has length 58 [2024-09-20 19:59:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:59:09,603 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 165 transitions. [2024-09-20 19:59:09,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 19:59:09,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 165 transitions. [2024-09-20 19:59:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 19:59:09,605 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:09,605 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:59:09,606 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-20 19:59:09,606 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:09,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:09,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1638594499, now seen corresponding path program 1 times [2024-09-20 19:59:09,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:09,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182702369] [2024-09-20 19:59:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:09,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:59:09,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969042432] [2024-09-20 19:59:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:09,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:59:09,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:59:09,664 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) [2024-09-20 19:59:09,667 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:59:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:09,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-09-20 19:59:09,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:59:09,913 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 [2024-09-20 19:59:09,980 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 21 treesize of output 15 [2024-09-20 19:59:09,984 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 [2024-09-20 19:59:09,998 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 [2024-09-20 19:59:10,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2024-09-20 19:59:15,867 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 67 treesize of output 40 [2024-09-20 19:59:15,876 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 [2024-09-20 19:59:16,299 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 47 treesize of output 35 [2024-09-20 19:59:16,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:59:16,324 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 155 treesize of output 143 [2024-09-20 19:59:16,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:59:16,349 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 171 treesize of output 115 [2024-09-20 19:59:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 19:59:16,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:59:24,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:59:24,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182702369] [2024-09-20 19:59:24,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:59:24,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969042432] [2024-09-20 19:59:24,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969042432] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:59:24,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:59:24,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-20 19:59:24,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269437040] [2024-09-20 19:59:24,497 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:59:24,497 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 19:59:24,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:59:24,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 19:59:24,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 19:59:24,499 INFO L87 Difference]: Start difference. First operand 139 states and 165 transitions. Second operand has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 11 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 19:59:28,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:59:32,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:59:40,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:59:42,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:59:47,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:59:51,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:59:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:59:52,448 INFO L93 Difference]: Finished difference Result 205 states and 248 transitions. [2024-09-20 19:59:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-20 19:59:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 11 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 58 [2024-09-20 19:59:52,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:59:52,452 INFO L225 Difference]: With dead ends: 205 [2024-09-20 19:59:52,452 INFO L226 Difference]: Without dead ends: 201 [2024-09-20 19:59:52,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=279, Invalid=2477, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 19:59:52,457 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 118 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 39 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:59:52,457 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 450 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1574 Invalid, 8 Unknown, 0 Unchecked, 26.0s Time] [2024-09-20 19:59:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-20 19:59:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2024-09-20 19:59:52,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 122 states have (on average 1.1229508196721312) internal successors, (137), 129 states have internal predecessors, (137), 42 states have call successors, (42), 28 states have call predecessors, (42), 33 states have return successors, (60), 40 states have call predecessors, (60), 38 states have call successors, (60) [2024-09-20 19:59:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2024-09-20 19:59:52,596 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 58 [2024-09-20 19:59:52,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:59:52,597 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2024-09-20 19:59:52,597 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 11 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 19:59:52,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2024-09-20 19:59:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-20 19:59:52,599 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:52,599 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:59:52,608 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 19:59:52,799 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 [2024-09-20 19:59:52,800 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:52,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:52,800 INFO L85 PathProgramCache]: Analyzing trace with hash 336534583, now seen corresponding path program 2 times [2024-09-20 19:59:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:52,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131043473] [2024-09-20 19:59:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:52,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:59:52,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878070300] [2024-09-20 19:59:52,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:59:52,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:59:52,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:59:52,868 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) [2024-09-20 19:59:52,870 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:59:53,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:59:53,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:59:53,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-09-20 19:59:53,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:59:53,098 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 [2024-09-20 19:59:53,249 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 21 treesize of output 15 [2024-09-20 19:59:53,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:59:53,275 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 [2024-09-20 19:59:53,678 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 27 [2024-09-20 19:59:54,520 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 [2024-09-20 19:59:54,541 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 56 treesize of output 40 [2024-09-20 19:59:54,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2024-09-20 19:59:54,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:59:54,879 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 129 treesize of output 121 [2024-09-20 19:59:54,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:59:54,891 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 149 treesize of output 97 [2024-09-20 19:59:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 19:59:56,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:00:05,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:05,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131043473] [2024-09-20 20:00:05,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:00:05,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878070300] [2024-09-20 20:00:05,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878070300] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:00:05,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:00:05,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-20 20:00:05,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158274474] [2024-09-20 20:00:05,377 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:00:05,378 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 20:00:05,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:05,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 20:00:05,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 20:00:05,379 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 27 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-20 20:00:09,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 20:00:13,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 20:00:19,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 20:00:22,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 20:00:24,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:24,807 INFO L93 Difference]: Finished difference Result 217 states and 265 transitions. [2024-09-20 20:00:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 20:00:24,807 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 70 [2024-09-20 20:00:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:24,810 INFO L225 Difference]: With dead ends: 217 [2024-09-20 20:00:24,810 INFO L226 Difference]: Without dead ends: 215 [2024-09-20 20:00:24,811 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 20:00:24,815 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 115 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 45 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:24,815 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 402 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1383 Invalid, 8 Unknown, 0 Unchecked, 18.1s Time] [2024-09-20 20:00:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-20 20:00:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 200. [2024-09-20 20:00:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 123 states have (on average 1.1219512195121952) internal successors, (138), 130 states have internal predecessors, (138), 42 states have call successors, (42), 28 states have call predecessors, (42), 34 states have return successors, (64), 41 states have call predecessors, (64), 38 states have call successors, (64) [2024-09-20 20:00:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2024-09-20 20:00:24,958 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 70 [2024-09-20 20:00:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:24,958 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2024-09-20 20:00:24,958 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-20 20:00:24,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2024-09-20 20:00:24,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-20 20:00:24,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:24,963 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:00:24,974 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 20:00:25,163 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 [2024-09-20 20:00:25,164 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:25,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1164971733, now seen corresponding path program 3 times [2024-09-20 20:00:25,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:25,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805674025] [2024-09-20 20:00:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:25,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:00:25,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086108071] [2024-09-20 20:00:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 20:00:25,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:25,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:25,237 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) [2024-09-20 20:00:25,238 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 20:00:26,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 20:00:26,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:00:26,203 WARN L260 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 281 conjuncts are in the unsatisfiable core [2024-09-20 20:00:26,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:00:26,213 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 [2024-09-20 20:00:26,249 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 [2024-09-20 20:00:26,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:00:26,812 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 [2024-09-20 20:00:27,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 20:00:28,419 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 43 treesize of output 35 [2024-09-20 20:00:28,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2024-09-20 20:00:28,425 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 [2024-09-20 20:00:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-20 20:00:28,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:00:31,381 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 285 treesize of output 281 [2024-09-20 20:01:03,105 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 284 treesize of output 280 [2024-09-20 20:01:03,145 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 284 treesize of output 280 [2024-09-20 20:01:03,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:03,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805674025] [2024-09-20 20:01:03,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:03,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086108071] [2024-09-20 20:01:03,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086108071] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:01:03,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:01:03,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 20:01:03,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218020142] [2024-09-20 20:01:03,986 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:01:03,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 20:01:03,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:03,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 20:01:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1027, Unknown=1, NotChecked=0, Total=1122 [2024-09-20 20:01:03,988 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 25 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 20:01:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:09,955 INFO L93 Difference]: Finished difference Result 285 states and 373 transitions. [2024-09-20 20:01:09,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 20:01:09,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 82 [2024-09-20 20:01:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:09,958 INFO L225 Difference]: With dead ends: 285 [2024-09-20 20:01:09,958 INFO L226 Difference]: Without dead ends: 283 [2024-09-20 20:01:09,959 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=308, Invalid=2997, Unknown=1, NotChecked=0, Total=3306 [2024-09-20 20:01:09,960 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 139 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 108 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:09,960 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 273 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1482 Invalid, 8 Unknown, 0 Unchecked, 2.1s Time] [2024-09-20 20:01:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-09-20 20:01:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2024-09-20 20:01:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 180 states have internal predecessors, (191), 58 states have call successors, (58), 38 states have call predecessors, (58), 50 states have return successors, (111), 60 states have call predecessors, (111), 53 states have call successors, (111) [2024-09-20 20:01:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 360 transitions. [2024-09-20 20:01:10,110 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 360 transitions. Word has length 82 [2024-09-20 20:01:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:10,110 INFO L474 AbstractCegarLoop]: Abstraction has 279 states and 360 transitions. [2024-09-20 20:01:10,110 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 20:01:10,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 360 transitions. [2024-09-20 20:01:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-20 20:01:10,112 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:10,112 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:01:10,120 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 20:01:10,312 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 [2024-09-20 20:01:10,313 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:10,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:10,313 INFO L85 PathProgramCache]: Analyzing trace with hash 993203871, now seen corresponding path program 4 times [2024-09-20 20:01:10,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:10,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957064750] [2024-09-20 20:01:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:10,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:10,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009704708] [2024-09-20 20:01:10,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 20:01:10,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:10,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:10,390 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) [2024-09-20 20:01:10,391 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 20:01:10,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 20:01:10,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:01:10,902 WARN L260 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 331 conjuncts are in the unsatisfiable core [2024-09-20 20:01:10,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:10,915 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 [2024-09-20 20:01:11,265 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 77 treesize of output 63 [2024-09-20 20:01:11,326 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 52 treesize of output 40 [2024-09-20 20:01:11,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2024-09-20 20:01:15,489 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_arrayElimCell_41 Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_10| Int) (v_arrayElimCell_40 Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_10| Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_10| Int)) (let ((.cse0 (select (select |c_#memory_int#1| |v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_10|) |v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_10|))) (= (* .cse0 .cse0) (+ (* v_arrayElimCell_40 v_arrayElimCell_40) (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_10|) |v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_10|) 4) (* 4 v_arrayElimCell_41) (* 2 v_arrayElimCell_40) (* .cse0 2))))) is different from true [2024-09-20 20:01:25,149 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 77 treesize of output 65 [2024-09-20 20:01:25,314 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 [2024-09-20 20:01:26,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:01:26,447 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 93 treesize of output 69 [2024-09-20 20:01:26,454 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 [2024-09-20 20:01:26,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:01:26,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2024-09-20 20:01:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 43 trivial. 38 not checked. [2024-09-20 20:01:31,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:01:55,890 WARN L293 SmtUtils]: Spent 7.36s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-20 20:02:13,210 WARN L293 SmtUtils]: Spent 11.04s on a formula simplification. DAG size of input: 161 DAG size of output: 141 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-20 20:02:34,502 WARN L293 SmtUtils]: Spent 12.52s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)