./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 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_hard-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 dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:55:46,284 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:55:46,356 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:55:46,363 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:55:46,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:55:46,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:55:46,388 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:55:46,389 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:55:46,389 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:55:46,389 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:55:46,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:55:46,390 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:55:46,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:55:46,391 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:55:46,391 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:55:46,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:55:46,395 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:55:46,395 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:55:46,396 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:55:46,396 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:55:46,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:55:46,399 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:55:46,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:55:46,400 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:55:46,400 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:55:46,400 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:55:46,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:55:46,401 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:55:46,401 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:55:46,401 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:55:46,401 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:55:46,402 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:55:46,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:55:46,405 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:55:46,405 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:55:46,406 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:55:46,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:55:46,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:55:46,406 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:55:46,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:55:46,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:55:46,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:55:46,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:55:46,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:55:46,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:55:46,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:55:46,742 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:55:46,742 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:55:46,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-09-15 19:55:48,252 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:55:48,435 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:55:48,436 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-09-15 19:55:48,446 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c08339ad0/3d9a4ead549344989d2b0443e1f3a788/FLAG39b14b41c [2024-09-15 19:55:48,462 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c08339ad0/3d9a4ead549344989d2b0443e1f3a788 [2024-09-15 19:55:48,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:55:48,467 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:55:48,470 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:55:48,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:55:48,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:55:48,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,477 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b051b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48, skipping insertion in model container [2024-09-15 19:55:48,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,502 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:55:48,675 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_hard-ll.c[1083,1096] [2024-09-15 19:55:48,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:55:48,719 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:55:48,732 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_hard-ll.c[1083,1096] [2024-09-15 19:55:48,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:55:48,772 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:55:48,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48 WrapperNode [2024-09-15 19:55:48,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:55:48,774 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:55:48,774 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:55:48,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:55:48,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,790 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,801 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:55:48,805 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:55:48,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:55:48,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:55:48,806 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:55:48,816 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,819 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,843 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 12, 8, 7, 6, 5, 9]. 24 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 3, 2, 1, 2, 1, 3]. [2024-09-15 19:55:48,844 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,844 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,859 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,864 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,868 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:55:48,873 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:55:48,873 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:55:48,873 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:55:48,874 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (1/1) ... [2024-09-15 19:55:48,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:55:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:55:48,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-15 19:55:48,911 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 [2024-09-15 19:55:48,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:55:48,958 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:55:48,959 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:55:48,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:55:48,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:55:48,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:55:48,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 19:55:48,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-15 19:55:48,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-15 19:55:48,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-15 19:55:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-15 19:55:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-15 19:55:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_51_0 [2024-09-15 19:55:48,962 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_51_0 [2024-09-15 19:55:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 19:55:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_38_0 [2024-09-15 19:55:48,962 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_38_0 [2024-09-15 19:55:48,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 19:55:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 19:55:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-15 19:55:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-15 19:55:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-15 19:55:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-15 19:55:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-15 19:55:48,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:55:48,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:55:48,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:55:48,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:55:48,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 19:55:48,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 19:55:48,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-15 19:55:48,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-15 19:55:48,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-15 19:55:48,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-15 19:55:48,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-15 19:55:48,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:55:48,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:55:48,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 19:55:49,077 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:55:49,080 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:55:49,384 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-15 19:55:49,385 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:55:49,409 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:55:49,410 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:55:49,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:55:49 BoogieIcfgContainer [2024-09-15 19:55:49,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:55:49,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:55:49,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:55:49,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:55:49,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:55:48" (1/3) ... [2024-09-15 19:55:49,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e2f701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:55:49, skipping insertion in model container [2024-09-15 19:55:49,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:55:48" (2/3) ... [2024-09-15 19:55:49,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e2f701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:55:49, skipping insertion in model container [2024-09-15 19:55:49,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:55:49" (3/3) ... [2024-09-15 19:55:49,419 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard-ll.c [2024-09-15 19:55:49,433 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:55:49,434 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:55:49,490 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:55:49,496 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;@11f35284, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:55:49,497 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:55:49,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-15 19:55:49,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 19:55:49,507 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:49,508 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:55:49,508 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:49,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:49,514 INFO L85 PathProgramCache]: Analyzing trace with hash -261209268, now seen corresponding path program 1 times [2024-09-15 19:55:49,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:49,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256801900] [2024-09-15 19:55:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:50,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:55:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:50,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:55:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:55:50,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:50,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256801900] [2024-09-15 19:55:50,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256801900] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:55:50,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:55:50,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:55:50,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587070114] [2024-09-15 19:55:50,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:55:50,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:55:50,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:50,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:55:50,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:55:50,226 INFO L87 Difference]: Start difference. First operand has 50 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:55:50,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:55:50,433 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2024-09-15 19:55:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:55:50,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-15 19:55:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:55:50,443 INFO L225 Difference]: With dead ends: 96 [2024-09-15 19:55:50,443 INFO L226 Difference]: Without dead ends: 50 [2024-09-15 19:55:50,448 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:55:50,452 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:55:50,453 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 296 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:55:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-15 19:55:50,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-15 19:55:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 19:55:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-09-15 19:55:50,501 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 18 [2024-09-15 19:55:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:55:50,502 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-09-15 19:55:50,502 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:55:50,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:50,503 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-09-15 19:55:50,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 19:55:50,504 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:50,504 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:55:50,504 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:55:50,505 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:50,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash 249081250, now seen corresponding path program 1 times [2024-09-15 19:55:50,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:50,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615358246] [2024-09-15 19:55:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:50,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:50,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:55:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:51,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:55:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:51,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:55:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:55:51,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:51,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615358246] [2024-09-15 19:55:51,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615358246] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:55:51,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:55:51,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:55:51,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300962120] [2024-09-15 19:55:51,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:55:51,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:55:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:55:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:55:51,017 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:55:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:55:51,191 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2024-09-15 19:55:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:55:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-15 19:55:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:55:51,194 INFO L225 Difference]: With dead ends: 56 [2024-09-15 19:55:51,195 INFO L226 Difference]: Without dead ends: 54 [2024-09-15 19:55:51,196 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:55:51,197 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 17 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:55:51,197 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 279 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:55:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-15 19:55:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-15 19:55:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 19:55:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-09-15 19:55:51,210 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 24 [2024-09-15 19:55:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:55:51,210 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-09-15 19:55:51,211 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:55:51,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-09-15 19:55:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 19:55:51,212 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:51,212 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:55:51,212 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:55:51,213 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:51,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:51,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1395279990, now seen corresponding path program 1 times [2024-09-15 19:55:51,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:51,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735896960] [2024-09-15 19:55:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:51,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:55:51,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600012541] [2024-09-15 19:55:51,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:51,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:51,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:55:51,253 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) [2024-09-15 19:55:51,255 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:55:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:51,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-15 19:55:51,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:55:51,485 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 [2024-09-15 19:55:51,499 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 17 treesize of output 13 [2024-09-15 19:55:51,515 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 [2024-09-15 19:55:51,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-15 19:55:51,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-15 19:55:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:55:51,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:55:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:55:52,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:52,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735896960] [2024-09-15 19:55:52,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:55:52,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600012541] [2024-09-15 19:55:52,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600012541] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:55:52,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:55:52,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-15 19:55:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999834740] [2024-09-15 19:55:52,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:55:52,131 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:55:52,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:55:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:55:52,132 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:55:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:55:52,412 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2024-09-15 19:55:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:55:52,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-09-15 19:55:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:55:52,417 INFO L225 Difference]: With dead ends: 65 [2024-09-15 19:55:52,420 INFO L226 Difference]: Without dead ends: 63 [2024-09-15 19:55:52,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:55:52,421 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 15 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:55:52,421 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 271 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:55:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-15 19:55:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2024-09-15 19:55:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 19:55:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2024-09-15 19:55:52,445 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 30 [2024-09-15 19:55:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:55:52,446 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2024-09-15 19:55:52,446 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:55:52,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2024-09-15 19:55:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 19:55:52,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:52,448 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:55:52,457 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:55:52,648 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:52,649 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:52,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:52,652 INFO L85 PathProgramCache]: Analyzing trace with hash -127824258, now seen corresponding path program 1 times [2024-09-15 19:55:52,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:52,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242104255] [2024-09-15 19:55:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:52,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:55:52,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309405540] [2024-09-15 19:55:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:52,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:52,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:55:52,715 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) [2024-09-15 19:55:52,717 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:55:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:52,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-15 19:55:52,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:55:52,852 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 [2024-09-15 19:55:52,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:55:52,861 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 17 treesize of output 13 [2024-09-15 19:55:53,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-15 19:55:53,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-15 19:55:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:55:53,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:55:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:55:53,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:53,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242104255] [2024-09-15 19:55:53,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:55:53,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309405540] [2024-09-15 19:55:53,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309405540] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:55:53,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:55:53,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-09-15 19:55:53,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862553947] [2024-09-15 19:55:53,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:55:53,390 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:55:53,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:53,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:55:53,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:55:53,391 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 8 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-15 19:55:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:55:53,630 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2024-09-15 19:55:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 19:55:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2024-09-15 19:55:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:55:53,634 INFO L225 Difference]: With dead ends: 78 [2024-09-15 19:55:53,634 INFO L226 Difference]: Without dead ends: 76 [2024-09-15 19:55:53,634 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-15 19:55:53,635 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 19 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:55:53,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 303 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:55:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-15 19:55:53,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-09-15 19:55:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 50 states have internal predecessors, (52), 17 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-15 19:55:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2024-09-15 19:55:53,657 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 42 [2024-09-15 19:55:53,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:55:53,657 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2024-09-15 19:55:53,657 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-15 19:55:53,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:53,658 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2024-09-15 19:55:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-15 19:55:53,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:53,659 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:55:53,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 19:55:53,863 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:53,864 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:53,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:53,864 INFO L85 PathProgramCache]: Analyzing trace with hash -782540599, now seen corresponding path program 1 times [2024-09-15 19:55:53,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:53,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393537091] [2024-09-15 19:55:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:53,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:55:53,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781152061] [2024-09-15 19:55:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:53,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:53,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:55:53,927 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) [2024-09-15 19:55:53,929 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:55:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:54,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-09-15 19:55:54,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:55:54,134 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 [2024-09-15 19:55:54,141 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 17 treesize of output 13 [2024-09-15 19:55:54,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-15 19:55:54,155 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 [2024-09-15 19:55:54,165 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 [2024-09-15 19:55:54,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:55:54,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:54,715 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 42 treesize of output 34 [2024-09-15 19:55:59,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-15 19:55:59,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-09-15 19:55:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 19:55:59,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:00,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:00,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393537091] [2024-09-15 19:56:00,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:00,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781152061] [2024-09-15 19:56:00,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781152061] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:00,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:00,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-15 19:56:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571742630] [2024-09-15 19:56:00,126 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:00,127 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 19:56:00,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:00,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 19:56:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=616, Unknown=1, NotChecked=0, Total=702 [2024-09-15 19:56:00,128 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-15 19:56:06,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:10,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:14,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:14,381 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2024-09-15 19:56:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 19:56:14,382 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 48 [2024-09-15 19:56:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:14,383 INFO L225 Difference]: With dead ends: 119 [2024-09-15 19:56:14,384 INFO L226 Difference]: Without dead ends: 117 [2024-09-15 19:56:14,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=231, Invalid=1574, Unknown=1, NotChecked=0, Total=1806 [2024-09-15 19:56:14,385 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 60 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 36 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:14,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 236 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 563 Invalid, 3 Unknown, 0 Unchecked, 13.4s Time] [2024-09-15 19:56:14,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-15 19:56:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2024-09-15 19:56:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 73 states have internal predecessors, (78), 24 states have call successors, (24), 16 states have call predecessors, (24), 17 states have return successors, (28), 22 states have call predecessors, (28), 20 states have call successors, (28) [2024-09-15 19:56:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2024-09-15 19:56:14,434 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 48 [2024-09-15 19:56:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:14,435 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2024-09-15 19:56:14,435 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 8 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-15 19:56:14,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2024-09-15 19:56:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 19:56:14,438 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:14,438 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:14,447 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 19:56:14,639 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:14,640 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:14,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1885035655, now seen corresponding path program 1 times [2024-09-15 19:56:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:14,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750067536] [2024-09-15 19:56:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:14,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:14,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367717704] [2024-09-15 19:56:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:14,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:14,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:14,696 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) [2024-09-15 19:56:14,708 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:56:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:14,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-15 19:56:14,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:14,848 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 [2024-09-15 19:56:14,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:56:14,863 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 [2024-09-15 19:56:14,870 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 17 treesize of output 13 [2024-09-15 19:56:14,880 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 [2024-09-15 19:56:15,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:15,427 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 40 treesize of output 40 [2024-09-15 19:56:15,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-15 19:56:15,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:15,694 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 47 treesize of output 43 [2024-09-15 19:56:15,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-09-15 19:56:15,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:15,716 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 35 treesize of output 35 [2024-09-15 19:56:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:56:15,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:20,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:20,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750067536] [2024-09-15 19:56:20,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:20,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367717704] [2024-09-15 19:56:20,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367717704] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:20,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:20,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-15 19:56:20,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138258053] [2024-09-15 19:56:20,156 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:20,157 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 19:56:20,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:20,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 19:56:20,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2024-09-15 19:56:20,158 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-15 19:56:24,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:28,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:32,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:37,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:41,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:56:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:41,389 INFO L93 Difference]: Finished difference Result 169 states and 194 transitions. [2024-09-15 19:56:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 19:56:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2024-09-15 19:56:41,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:41,392 INFO L225 Difference]: With dead ends: 169 [2024-09-15 19:56:41,392 INFO L226 Difference]: Without dead ends: 165 [2024-09-15 19:56:41,393 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=101, Invalid=450, Unknown=1, NotChecked=0, Total=552 [2024-09-15 19:56:41,397 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 67 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 41 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:41,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 202 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 496 Invalid, 7 Unknown, 0 Unchecked, 20.9s Time] [2024-09-15 19:56:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-15 19:56:41,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 157. [2024-09-15 19:56:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 104 states have internal predecessors, (113), 34 states have call successors, (34), 22 states have call predecessors, (34), 23 states have return successors, (37), 32 states have call predecessors, (37), 28 states have call successors, (37) [2024-09-15 19:56:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 184 transitions. [2024-09-15 19:56:41,454 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 184 transitions. Word has length 58 [2024-09-15 19:56:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:41,455 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 184 transitions. [2024-09-15 19:56:41,455 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-15 19:56:41,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 184 transitions. [2024-09-15 19:56:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-15 19:56:41,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:41,457 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:41,476 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-15 19:56:41,658 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:41,658 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:41,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:41,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1428903809, now seen corresponding path program 1 times [2024-09-15 19:56:41,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:41,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612694081] [2024-09-15 19:56:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:41,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:41,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:56:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:41,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:56:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:42,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:56:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:42,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:56:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:42,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:56:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:42,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:56:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:42,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 19:56:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:42,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-15 19:56:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 19:56:42,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:42,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612694081] [2024-09-15 19:56:42,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612694081] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:56:42,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:56:42,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:56:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380493470] [2024-09-15 19:56:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:56:42,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:56:42,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:42,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:56:42,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:56:42,076 INFO L87 Difference]: Start difference. First operand 157 states and 184 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-15 19:56:42,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:42,368 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2024-09-15 19:56:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:56:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 59 [2024-09-15 19:56:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:42,371 INFO L225 Difference]: With dead ends: 163 [2024-09-15 19:56:42,371 INFO L226 Difference]: Without dead ends: 115 [2024-09-15 19:56:42,371 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:56:42,372 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 62 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:42,373 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 107 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:56:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-15 19:56:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-09-15 19:56:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 74 states have internal predecessors, (78), 24 states have call successors, (24), 17 states have call predecessors, (24), 17 states have return successors, (25), 22 states have call predecessors, (25), 20 states have call successors, (25) [2024-09-15 19:56:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2024-09-15 19:56:42,411 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 59 [2024-09-15 19:56:42,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:42,412 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2024-09-15 19:56:42,412 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-15 19:56:42,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2024-09-15 19:56:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-15 19:56:42,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:42,415 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:42,415 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-15 19:56:42,415 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:42,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:42,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1617999346, now seen corresponding path program 1 times [2024-09-15 19:56:42,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:42,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972464579] [2024-09-15 19:56:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:42,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:42,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510985004] [2024-09-15 19:56:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:42,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:42,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:42,488 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) [2024-09-15 19:56:42,489 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:56:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:42,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-15 19:56:42,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:42,781 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 [2024-09-15 19:56:42,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-15 19:56:42,796 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 [2024-09-15 19:56:42,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:56:43,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-15 19:56:43,136 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 [2024-09-15 19:56:43,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-15 19:56:43,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-15 19:56:43,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:43,861 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 20 treesize of output 16 [2024-09-15 19:56:43,868 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 16 treesize of output 12 [2024-09-15 19:56:51,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972464579] [2024-09-15 19:56:51,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510985004] [2024-09-15 19:56:51,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510985004] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:51,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:51,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-15 19:56:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763378294] [2024-09-15 19:56:51,672 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:51,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 19:56:51,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 19:56:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-09-15 19:56:51,674 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-15 19:56:52,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:52,632 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2024-09-15 19:56:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 19:56:52,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-09-15 19:56:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:52,634 INFO L225 Difference]: With dead ends: 147 [2024-09-15 19:56:52,635 INFO L226 Difference]: Without dead ends: 145 [2024-09-15 19:56:52,635 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2024-09-15 19:56:52,636 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 41 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:52,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 209 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 610 Invalid, 2 Unknown, 0 Unchecked, 0.7s Time] [2024-09-15 19:56:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-15 19:56:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2024-09-15 19:56:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 90 states have (on average 1.1) internal successors, (99), 93 states have internal predecessors, (99), 29 states have call successors, (29), 21 states have call predecessors, (29), 23 states have return successors, (35), 28 states have call predecessors, (35), 24 states have call successors, (35) [2024-09-15 19:56:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 163 transitions. [2024-09-15 19:56:52,681 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 163 transitions. Word has length 72 [2024-09-15 19:56:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:52,682 INFO L474 AbstractCegarLoop]: Abstraction has 143 states and 163 transitions. [2024-09-15 19:56:52,682 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 9 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-15 19:56:52,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 163 transitions. [2024-09-15 19:56:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-15 19:56:52,684 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:52,684 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:52,704 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 19:56:52,885 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-15 19:56:52,885 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:52,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:52,886 INFO L85 PathProgramCache]: Analyzing trace with hash -851672613, now seen corresponding path program 2 times [2024-09-15 19:56:52,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:52,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874514125] [2024-09-15 19:56:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:52,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:52,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756120452] [2024-09-15 19:56:52,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:56:52,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:52,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:52,989 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) [2024-09-15 19:56:52,991 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:56:53,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:56:53,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:56:53,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-15 19:56:53,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:53,141 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 [2024-09-15 19:56:53,159 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 [2024-09-15 19:56:53,164 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 17 treesize of output 13 [2024-09-15 19:56:53,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:56:53,604 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 [2024-09-15 19:56:53,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-15 19:56:53,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-15 19:56:53,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 54 proven. 25 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-15 19:56:53,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:54,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:54,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874514125] [2024-09-15 19:56:54,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:54,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756120452] [2024-09-15 19:56:54,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756120452] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:54,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:54,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-15 19:56:54,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134272507] [2024-09-15 19:56:54,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:54,853 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 19:56:54,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:54,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 19:56:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:56:54,854 INFO L87 Difference]: Start difference. First operand 143 states and 163 transitions. Second operand has 17 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 19:56:55,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:55,989 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2024-09-15 19:56:55,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 19:56:55,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 96 [2024-09-15 19:56:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:55,993 INFO L225 Difference]: With dead ends: 175 [2024-09-15 19:56:55,994 INFO L226 Difference]: Without dead ends: 173 [2024-09-15 19:56:55,995 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 19:56:55,996 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 39 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:55,997 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 300 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 823 Invalid, 2 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 19:56:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-15 19:56:56,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2024-09-15 19:56:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 91 states have (on average 1.098901098901099) internal successors, (100), 94 states have internal predecessors, (100), 29 states have call successors, (29), 21 states have call predecessors, (29), 24 states have return successors, (37), 29 states have call predecessors, (37), 24 states have call successors, (37) [2024-09-15 19:56:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2024-09-15 19:56:56,048 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 96 [2024-09-15 19:56:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:56,049 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2024-09-15 19:56:56,049 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 19:56:56,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:56,050 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2024-09-15 19:56:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-15 19:56:56,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:56,052 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:56,067 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 19:56:56,253 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:56,253 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:56,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:56,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2096548347, now seen corresponding path program 1 times [2024-09-15 19:56:56,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:56,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406647598] [2024-09-15 19:56:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:56,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:56,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:56:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:56,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:56:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:57,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:56:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:57,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:56:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:57,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:56:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:57,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:56:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:57,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 19:56:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:57,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:56:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:57,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:56:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:57,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-15 19:56:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 19:56:57,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:57,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406647598] [2024-09-15 19:56:57,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406647598] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:56:57,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:56:57,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-15 19:56:57,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84162219] [2024-09-15 19:56:57,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:56:57,314 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 19:56:57,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:57,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 19:56:57,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-09-15 19:56:57,315 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-15 19:56:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:58,030 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2024-09-15 19:56:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:56:58,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 64 [2024-09-15 19:56:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:58,031 INFO L225 Difference]: With dead ends: 147 [2024-09-15 19:56:58,032 INFO L226 Difference]: Without dead ends: 117 [2024-09-15 19:56:58,032 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-09-15 19:56:58,033 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:58,033 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 119 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 19:56:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-15 19:56:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-09-15 19:56:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.125) internal successors, (81), 76 states have internal predecessors, (81), 24 states have call successors, (24), 16 states have call predecessors, (24), 20 states have return successors, (32), 24 states have call predecessors, (32), 20 states have call successors, (32) [2024-09-15 19:56:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2024-09-15 19:56:58,072 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 64 [2024-09-15 19:56:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:58,072 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2024-09-15 19:56:58,072 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-15 19:56:58,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2024-09-15 19:56:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-15 19:56:58,075 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:58,075 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:58,075 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-15 19:56:58,076 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:58,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:58,076 INFO L85 PathProgramCache]: Analyzing trace with hash 129307780, now seen corresponding path program 3 times [2024-09-15 19:56:58,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:58,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204490006] [2024-09-15 19:56:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:58,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:58,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650825964] [2024-09-15 19:56:58,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:56:58,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:58,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:58,176 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) [2024-09-15 19:56:58,178 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:56:58,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 19:56:58,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:56:58,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-09-15 19:56:58,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:58,487 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 [2024-09-15 19:56:58,523 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 17 treesize of output 13 [2024-09-15 19:56:58,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:56:58,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:56:59,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-15 19:56:59,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:59,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-15 19:56:59,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:56:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 72 proven. 40 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-09-15 19:56:59,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:00,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:00,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204490006] [2024-09-15 19:57:00,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:00,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650825964] [2024-09-15 19:57:00,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650825964] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:00,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:00,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-15 19:57:00,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899135214] [2024-09-15 19:57:00,697 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:00,697 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 19:57:00,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 19:57:00,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2024-09-15 19:57:00,698 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-15 19:57:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:02,174 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2024-09-15 19:57:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 19:57:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) Word has length 120 [2024-09-15 19:57:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:02,176 INFO L225 Difference]: With dead ends: 149 [2024-09-15 19:57:02,176 INFO L226 Difference]: Without dead ends: 147 [2024-09-15 19:57:02,177 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 19:57:02,177 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:02,178 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 405 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-15 19:57:02,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-15 19:57:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 119. [2024-09-15 19:57:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 77 states have internal predecessors, (82), 24 states have call successors, (24), 16 states have call predecessors, (24), 21 states have return successors, (34), 25 states have call predecessors, (34), 20 states have call successors, (34) [2024-09-15 19:57:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2024-09-15 19:57:02,217 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 120 [2024-09-15 19:57:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:02,218 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2024-09-15 19:57:02,218 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 10 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-15 19:57:02,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2024-09-15 19:57:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-09-15 19:57:02,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:02,220 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:57:02,228 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 19:57:02,422 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:02,422 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:02,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2139308563, now seen corresponding path program 4 times [2024-09-15 19:57:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:02,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654865853] [2024-09-15 19:57:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:02,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:02,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949280568] [2024-09-15 19:57:02,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 19:57:02,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:02,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:02,512 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) [2024-09-15 19:57:02,513 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:57:02,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 19:57:02,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:57:02,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 219 conjuncts are in the unsatisfiable core [2024-09-15 19:57:02,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:02,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:57:02,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-15 19:57:02,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-15 19:57:02,918 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 [2024-09-15 19:57:02,929 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 [2024-09-15 19:57:02,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:57:04,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:04,993 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 [2024-09-15 19:57:05,000 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 44 treesize of output 28 [2024-09-15 19:57:05,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:05,015 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 57 treesize of output 41 [2024-09-15 19:57:05,393 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 30 treesize of output 18 [2024-09-15 19:57:05,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-09-15 19:57:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 3 proven. 147 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2024-09-15 19:57:05,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:08,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:08,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654865853] [2024-09-15 19:57:08,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:08,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949280568] [2024-09-15 19:57:08,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949280568] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:08,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:08,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-15 19:57:08,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638641410] [2024-09-15 19:57:08,937 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:08,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 19:57:08,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 19:57:08,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2024-09-15 19:57:08,939 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 24 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-15 19:57:15,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:19,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:23,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:23,858 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2024-09-15 19:57:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 19:57:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) Word has length 144 [2024-09-15 19:57:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:23,860 INFO L225 Difference]: With dead ends: 153 [2024-09-15 19:57:23,860 INFO L226 Difference]: Without dead ends: 151 [2024-09-15 19:57:23,861 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=212, Invalid=1768, Unknown=0, NotChecked=0, Total=1980 [2024-09-15 19:57:23,861 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 45 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 35 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:23,861 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 456 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1196 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2024-09-15 19:57:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-15 19:57:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2024-09-15 19:57:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 78 states have internal predecessors, (83), 24 states have call successors, (24), 16 states have call predecessors, (24), 22 states have return successors, (36), 26 states have call predecessors, (36), 20 states have call successors, (36) [2024-09-15 19:57:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2024-09-15 19:57:23,905 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 144 [2024-09-15 19:57:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:23,905 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2024-09-15 19:57:23,905 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-15 19:57:23,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2024-09-15 19:57:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-09-15 19:57:23,908 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:23,908 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:57:23,927 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-15 19:57:24,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:24,109 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:24,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:24,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1377710570, now seen corresponding path program 5 times [2024-09-15 19:57:24,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:24,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232678864] [2024-09-15 19:57:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:24,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:24,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867320008] [2024-09-15 19:57:24,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 19:57:24,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:24,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:24,232 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:24,233 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:57:25,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-15 19:57:25,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:57:25,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 178 conjuncts are in the unsatisfiable core [2024-09-15 19:57:25,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:25,204 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 [2024-09-15 19:57:25,219 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 17 treesize of output 13 [2024-09-15 19:57:25,230 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 [2024-09-15 19:57:25,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:57:26,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-15 19:57:26,142 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 [2024-09-15 19:57:26,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-15 19:57:26,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 108 proven. 76 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2024-09-15 19:57:26,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:28,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:28,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232678864] [2024-09-15 19:57:28,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:28,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867320008] [2024-09-15 19:57:28,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867320008] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:28,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:28,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-15 19:57:28,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37612403] [2024-09-15 19:57:28,321 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:28,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 19:57:28,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:28,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 19:57:28,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2024-09-15 19:57:28,322 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 19 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-15 19:57:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:29,718 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2024-09-15 19:57:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 19:57:29,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) Word has length 168 [2024-09-15 19:57:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:29,720 INFO L225 Difference]: With dead ends: 153 [2024-09-15 19:57:29,721 INFO L226 Difference]: Without dead ends: 151 [2024-09-15 19:57:29,721 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 19:57:29,722 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:29,722 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 356 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-15 19:57:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-15 19:57:29,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 123. [2024-09-15 19:57:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 75 states have (on average 1.12) internal successors, (84), 79 states have internal predecessors, (84), 24 states have call successors, (24), 16 states have call predecessors, (24), 23 states have return successors, (38), 27 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-15 19:57:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2024-09-15 19:57:29,759 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 168 [2024-09-15 19:57:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:29,760 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2024-09-15 19:57:29,760 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-15 19:57:29,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2024-09-15 19:57:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-15 19:57:29,761 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:29,761 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:57:29,772 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 19:57:29,961 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 19:57:29,962 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:29,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash -797681310, now seen corresponding path program 1 times [2024-09-15 19:57:29,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:29,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537945750] [2024-09-15 19:57:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:29,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:57:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:57:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:57:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:57:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:57:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:57:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:57:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:57:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:57:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:57:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 19:57:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:57:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:57:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-15 19:57:30,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:30,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537945750] [2024-09-15 19:57:30,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537945750] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:30,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456638291] [2024-09-15 19:57:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:30,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:30,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:30,464 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:30,467 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 19:57:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:30,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-15 19:57:30,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:30,655 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 [2024-09-15 19:57:30,792 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 [2024-09-15 19:57:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-15 19:57:30,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:31,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-15 19:57:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456638291] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:31,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:57:31,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-09-15 19:57:31,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189580756] [2024-09-15 19:57:31,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:31,258 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 19:57:31,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 19:57:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-09-15 19:57:31,259 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 18 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 11 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-15 19:57:31,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:31,912 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2024-09-15 19:57:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 19:57:31,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 11 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) Word has length 82 [2024-09-15 19:57:31,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:31,914 INFO L225 Difference]: With dead ends: 145 [2024-09-15 19:57:31,914 INFO L226 Difference]: Without dead ends: 123 [2024-09-15 19:57:31,914 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 19:57:31,915 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:31,915 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 154 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 19:57:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-15 19:57:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2024-09-15 19:57:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 77 states have internal predecessors, (82), 25 states have call successors, (25), 16 states have call predecessors, (25), 21 states have return successors, (38), 28 states have call predecessors, (38), 22 states have call successors, (38) [2024-09-15 19:57:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2024-09-15 19:57:31,954 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 82 [2024-09-15 19:57:31,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:31,954 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2024-09-15 19:57:31,954 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 11 states have call successors, (21), 5 states have call predecessors, (21), 6 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-15 19:57:31,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2024-09-15 19:57:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-15 19:57:31,955 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:31,955 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:57:31,972 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-15 19:57:32,159 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 19:57:32,160 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:32,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2080657482, now seen corresponding path program 1 times [2024-09-15 19:57:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:32,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147195893] [2024-09-15 19:57:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:32,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222118387] [2024-09-15 19:57:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:32,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:32,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:32,241 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:32,242 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 19:57:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:32,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 207 conjuncts are in the unsatisfiable core [2024-09-15 19:57:32,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:32,546 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 [2024-09-15 19:57:32,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:57:32,552 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 [2024-09-15 19:57:32,556 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 [2024-09-15 19:57:32,562 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 17 treesize of output 13 [2024-09-15 19:57:32,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-15 19:57:32,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:57:33,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:57:33,469 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 [2024-09-15 19:57:33,485 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 42 treesize of output 26 [2024-09-15 19:57:34,333 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 [2024-09-15 19:57:34,358 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 113 treesize of output 66 [2024-09-15 19:57:34,521 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-15 19:57:34,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-15 19:57:34,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2024-09-15 19:57:34,578 INFO L349 Elim1Store]: treesize reduction 24, result has 53.8 percent of original size [2024-09-15 19:57:34,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 83 [2024-09-15 19:57:35,082 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 137 treesize of output 117 [2024-09-15 19:57:35,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:35,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 164 [2024-09-15 19:57:35,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:35,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 178 [2024-09-15 19:57:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 48 proven. 29 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-09-15 19:57:35,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:39,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:39,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147195893] [2024-09-15 19:57:39,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:57:39,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222118387] [2024-09-15 19:57:39,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222118387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:39,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:57:39,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-15 19:57:39,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456850367] [2024-09-15 19:57:39,783 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:39,783 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 19:57:39,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 19:57:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 19:57:39,785 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 23 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 19:57:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:42,767 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2024-09-15 19:57:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 19:57:42,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 83 [2024-09-15 19:57:42,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:42,770 INFO L225 Difference]: With dead ends: 162 [2024-09-15 19:57:42,770 INFO L226 Difference]: Without dead ends: 160 [2024-09-15 19:57:42,771 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 19:57:42,771 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 55 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:42,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 361 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1110 Invalid, 1 Unknown, 0 Unchecked, 1.9s Time] [2024-09-15 19:57:42,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-15 19:57:42,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2024-09-15 19:57:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 100 states have internal predecessors, (108), 31 states have call successors, (31), 21 states have call predecessors, (31), 26 states have return successors, (48), 34 states have call predecessors, (48), 28 states have call successors, (48) [2024-09-15 19:57:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 187 transitions. [2024-09-15 19:57:42,838 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 187 transitions. Word has length 83 [2024-09-15 19:57:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:42,839 INFO L474 AbstractCegarLoop]: Abstraction has 156 states and 187 transitions. [2024-09-15 19:57:42,839 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 19:57:42,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 187 transitions. [2024-09-15 19:57:42,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-15 19:57:42,840 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:42,840 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:57:42,851 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 19:57:43,041 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 19:57:43,041 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:43,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:43,042 INFO L85 PathProgramCache]: Analyzing trace with hash -986625217, now seen corresponding path program 1 times [2024-09-15 19:57:43,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:43,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601170129] [2024-09-15 19:57:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:43,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:43,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:57:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:43,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:57:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:43,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:57:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:57:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:57:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:57:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 19:57:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-15 19:57:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-15 19:57:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:57:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:57:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-15 19:57:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-15 19:57:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-15 19:57:44,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:57:44,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601170129] [2024-09-15 19:57:44,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601170129] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:44,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354683260] [2024-09-15 19:57:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:44,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:44,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:44,490 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:57:44,491 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 19:57:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:57:44,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-15 19:57:44,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:44,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-15 19:57:44,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:57:45,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-09-15 19:57:45,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-15 19:57:46,349 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 64 treesize of output 33 [2024-09-15 19:57:46,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:57:46,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:46,370 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 43 treesize of output 31 [2024-09-15 19:57:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 109 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-15 19:57:46,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:57:48,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354683260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:57:48,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:57:48,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2024-09-15 19:57:48,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106894046] [2024-09-15 19:57:48,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:57:48,731 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-15 19:57:48,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:57:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-15 19:57:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2024-09-15 19:57:48,732 INFO L87 Difference]: Start difference. First operand 156 states and 187 transitions. Second operand has 31 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 25 states have internal predecessors, (64), 15 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-15 19:57:53,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:57:58,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:58:02,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:58:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:58:02,161 INFO L93 Difference]: Finished difference Result 199 states and 238 transitions. [2024-09-15 19:58:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 19:58:02,161 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 25 states have internal predecessors, (64), 15 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) Word has length 89 [2024-09-15 19:58:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:58:02,163 INFO L225 Difference]: With dead ends: 199 [2024-09-15 19:58:02,163 INFO L226 Difference]: Without dead ends: 149 [2024-09-15 19:58:02,164 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 19:58:02,164 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 65 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 37 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:58:02,164 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 221 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 805 Invalid, 4 Unknown, 0 Unchecked, 12.9s Time] [2024-09-15 19:58:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-15 19:58:02,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2024-09-15 19:58:02,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 92 states have (on average 1.076086956521739) internal successors, (99), 93 states have internal predecessors, (99), 28 states have call successors, (28), 21 states have call predecessors, (28), 24 states have return successors, (41), 30 states have call predecessors, (41), 26 states have call successors, (41) [2024-09-15 19:58:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2024-09-15 19:58:02,248 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 89 [2024-09-15 19:58:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:58:02,248 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2024-09-15 19:58:02,248 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 25 states have internal predecessors, (64), 15 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (24), 12 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-15 19:58:02,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:02,248 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2024-09-15 19:58:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-09-15 19:58:02,250 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:58:02,250 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:58:02,268 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-15 19:58:02,450 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 19:58:02,450 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:58:02,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1356764415, now seen corresponding path program 6 times [2024-09-15 19:58:02,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:58:02,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427895271] [2024-09-15 19:58:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:58:02,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:58:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:58:02,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248848263] [2024-09-15 19:58:02,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 19:58:02,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:58:02,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:58:02,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:58:02,566 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 19:58:04,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-15 19:58:04,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:58:04,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 265 conjuncts are in the unsatisfiable core [2024-09-15 19:58:04,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:58:04,426 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 [2024-09-15 19:58:04,454 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 17 treesize of output 13 [2024-09-15 19:58:04,463 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 [2024-09-15 19:58:04,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:58:06,085 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 [2024-09-15 19:58:06,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-15 19:58:06,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-15 19:58:06,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-15 19:58:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 126 proven. 97 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2024-09-15 19:58:06,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:58:09,393 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 20 treesize of output 16 [2024-09-15 19:58:09,399 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 16 treesize of output 12 [2024-09-15 19:58:23,571 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_95| Int) (|v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_95| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_110| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_110| Int) (|v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_30| Int)) (let ((.cse1 (mod (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_30|) |v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_30|) 4294967296))) (or (not (= (select (select (store |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_38_0_#in~d.base| (let ((.cse0 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_38_0_#in~d.base|))) (store .cse0 |c_func_to_recursive_line_31_to_38_0_#in~d.offset| (* (select .cse0 |c_func_to_recursive_line_31_to_38_0_#in~d.offset|) 32)))) |v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_110|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_110|) (* .cse1 (select (select (store |c_old(#memory_int#6)| |c_func_to_recursive_line_31_to_38_0_#in~p.base| (let ((.cse2 (select |c_old(#memory_int#6)| |c_func_to_recursive_line_31_to_38_0_#in~p.base|))) (store .cse2 |c_func_to_recursive_line_31_to_38_0_#in~p.offset| (* 32 (select .cse2 |c_func_to_recursive_line_31_to_38_0_#in~p.offset|))))) |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_95|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_95|)))) (= (select (select (store |c_#memory_int#1| c_func_to_recursive_line_31_to_38_0_~d.base (let ((.cse3 (select |c_#memory_int#1| c_func_to_recursive_line_31_to_38_0_~d.base))) (store .cse3 c_func_to_recursive_line_31_to_38_0_~d.offset (* 16 (select .cse3 c_func_to_recursive_line_31_to_38_0_~d.offset))))) |v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_110|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_110|) (* (select (select (store |c_#memory_int#6| c_func_to_recursive_line_31_to_38_0_~p.base (let ((.cse4 (select |c_#memory_int#6| c_func_to_recursive_line_31_to_38_0_~p.base))) (store .cse4 c_func_to_recursive_line_31_to_38_0_~p.offset (* 16 (select .cse4 c_func_to_recursive_line_31_to_38_0_~p.offset))))) |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_95|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_95|) .cse1))))) is different from false [2024-09-15 19:58:23,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:58:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427895271] [2024-09-15 19:58:23,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:58:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248848263] [2024-09-15 19:58:23,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248848263] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:58:23,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:58:23,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-15 19:58:23,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441736513] [2024-09-15 19:58:23,578 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:58:23,578 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 19:58:23,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:58:23,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 19:58:23,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=901, Unknown=2, NotChecked=60, Total=1056 [2024-09-15 19:58:23,579 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand has 23 states, 18 states have (on average 2.111111111111111) internal successors, (38), 20 states have internal predecessors, (38), 10 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2024-09-15 19:58:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:58:25,442 INFO L93 Difference]: Finished difference Result 165 states and 190 transitions. [2024-09-15 19:58:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 19:58:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.111111111111111) internal successors, (38), 20 states have internal predecessors, (38), 10 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) Word has length 192 [2024-09-15 19:58:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:58:25,443 INFO L225 Difference]: With dead ends: 165 [2024-09-15 19:58:25,443 INFO L226 Difference]: Without dead ends: 163 [2024-09-15 19:58:25,444 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=165, Invalid=1477, Unknown=2, NotChecked=78, Total=1722 [2024-09-15 19:58:25,444 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:58:25,445 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 434 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-15 19:58:25,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-15 19:58:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 147. [2024-09-15 19:58:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 93 states have (on average 1.075268817204301) internal successors, (100), 94 states have internal predecessors, (100), 28 states have call successors, (28), 21 states have call predecessors, (28), 25 states have return successors, (43), 31 states have call predecessors, (43), 26 states have call successors, (43) [2024-09-15 19:58:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2024-09-15 19:58:25,520 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 192 [2024-09-15 19:58:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:58:25,521 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2024-09-15 19:58:25,521 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.111111111111111) internal successors, (38), 20 states have internal predecessors, (38), 10 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2024-09-15 19:58:25,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2024-09-15 19:58:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-15 19:58:25,522 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:58:25,522 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:58:25,537 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-15 19:58:25,723 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-15 19:58:25,723 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:58:25,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:25,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1725790163, now seen corresponding path program 2 times [2024-09-15 19:58:25,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:58:25,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887787202] [2024-09-15 19:58:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:58:25,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:58:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:58:25,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465608984] [2024-09-15 19:58:25,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:58:25,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:58:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:58:25,780 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:58:25,783 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-15 19:58:26,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:58:26,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:58:26,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 236 conjuncts are in the unsatisfiable core [2024-09-15 19:58:26,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:58:26,178 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 [2024-09-15 19:58:26,182 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 1 [2024-09-15 19:58:26,210 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 17 treesize of output 13 [2024-09-15 19:58:26,219 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 [2024-09-15 19:58:26,233 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 17 treesize of output 13 [2024-09-15 19:58:26,244 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 [2024-09-15 19:58:26,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:58:27,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-15 19:58:27,797 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 [2024-09-15 19:58:28,673 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 [2024-09-15 19:58:28,680 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 100 treesize of output 57 [2024-09-15 19:58:28,780 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 [2024-09-15 19:58:28,818 INFO L349 Elim1Store]: treesize reduction 26, result has 51.9 percent of original size [2024-09-15 19:58:28,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 63 [2024-09-15 19:58:28,891 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-15 19:58:28,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-15 19:58:29,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:58:29,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 172 [2024-09-15 19:58:29,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:58:29,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 252 [2024-09-15 19:58:29,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:58:29,337 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 113 treesize of output 97 [2024-09-15 19:58:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-15 19:58:29,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:58:37,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:58:37,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887787202] [2024-09-15 19:58:37,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:58:37,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465608984] [2024-09-15 19:58:37,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465608984] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:58:37,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:58:37,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-15 19:58:37,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697914146] [2024-09-15 19:58:37,747 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:58:37,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 19:58:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:58:37,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 19:58:37,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1019, Unknown=1, NotChecked=0, Total=1122 [2024-09-15 19:58:37,748 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-15 19:58:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:58:40,910 INFO L93 Difference]: Finished difference Result 186 states and 218 transitions. [2024-09-15 19:58:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 19:58:40,911 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 107 [2024-09-15 19:58:40,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:58:40,912 INFO L225 Difference]: With dead ends: 186 [2024-09-15 19:58:40,912 INFO L226 Difference]: Without dead ends: 184 [2024-09-15 19:58:40,913 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=159, Invalid=1562, Unknown=1, NotChecked=0, Total=1722 [2024-09-15 19:58:40,914 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 46 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:58:40,914 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 368 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-15 19:58:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-15 19:58:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 147. [2024-09-15 19:58:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 93 states have (on average 1.075268817204301) internal successors, (100), 94 states have internal predecessors, (100), 28 states have call successors, (28), 21 states have call predecessors, (28), 25 states have return successors, (43), 31 states have call predecessors, (43), 26 states have call successors, (43) [2024-09-15 19:58:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2024-09-15 19:58:41,039 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 107 [2024-09-15 19:58:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:58:41,040 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2024-09-15 19:58:41,040 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-15 19:58:41,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2024-09-15 19:58:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-09-15 19:58:41,041 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:58:41,041 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:58:41,050 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-15 19:58:41,242 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-15 19:58:41,242 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:58:41,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:58:41,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2048484008, now seen corresponding path program 7 times [2024-09-15 19:58:41,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:58:41,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343887053] [2024-09-15 19:58:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:58:41,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:58:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:58:41,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239548065] [2024-09-15 19:58:41,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 19:58:41,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:58:41,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:58:41,336 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:58:41,337 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-15 19:58:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:58:41,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 316 conjuncts are in the unsatisfiable core [2024-09-15 19:58:41,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:58:41,810 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 [2024-09-15 19:58:41,835 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 [2024-09-15 19:58:41,842 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 17 treesize of output 13 [2024-09-15 19:58:41,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-15 19:58:45,683 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 [2024-09-15 19:58:45,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-09-15 19:58:46,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-15 19:58:46,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:58:46,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2024-09-15 19:58:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 162 proven. 130 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2024-09-15 19:58:46,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:58:59,452 WARN L293 SmtUtils]: Spent 12.69s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-15 19:59:45,686 WARN L293 SmtUtils]: Spent 45.46s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)