./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/prefixsum_iter.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 1d5fa637 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/verifythis/prefixsum_iter.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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --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-dev-1d5fa63-m [2024-09-13 08:59:24,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 08:59:24,915 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 08:59:24,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 08:59:24,922 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 08:59:24,952 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 08:59:24,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 08:59:24,953 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 08:59:24,954 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 08:59:24,955 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 08:59:24,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 08:59:24,957 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 08:59:24,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 08:59:24,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 08:59:24,960 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 08:59:24,960 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 08:59:24,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 08:59:24,961 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 08:59:24,961 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 08:59:24,962 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 08:59:24,962 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 08:59:24,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 08:59:24,967 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 08:59:24,967 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 08:59:24,967 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 08:59:24,967 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 08:59:24,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 08:59:24,968 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 08:59:24,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 08:59:24,968 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 08:59:24,968 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 08:59:24,968 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 08:59:24,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:59:24,969 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 08:59:24,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 08:59:24,970 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 08:59:24,971 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 08:59:24,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 08:59:24,972 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 08:59:24,972 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 08:59:24,972 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 08:59:24,973 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 08:59:24,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 08:59:25,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 08:59:25,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 08:59:25,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 08:59:25,270 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 08:59:25,270 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 08:59:25,272 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-09-13 08:59:26,821 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 08:59:27,012 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 08:59:27,012 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-09-13 08:59:27,019 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a748d2ea7/0bc068dbea124688842dd7528295cef5/FLAG856506f23 [2024-09-13 08:59:27,032 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a748d2ea7/0bc068dbea124688842dd7528295cef5 [2024-09-13 08:59:27,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 08:59:27,036 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 08:59:27,037 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 08:59:27,037 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 08:59:27,045 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 08:59:27,046 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,047 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a9b4e24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27, skipping insertion in model container [2024-09-13 08:59:27,047 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,071 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 08:59:27,200 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2024-09-13 08:59:27,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:59:27,240 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 08:59:27,254 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2024-09-13 08:59:27,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:59:27,300 INFO L204 MainTranslator]: Completed translation [2024-09-13 08:59:27,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27 WrapperNode [2024-09-13 08:59:27,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 08:59:27,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 08:59:27,303 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 08:59:27,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 08:59:27,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,323 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,336 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 08:59:27,337 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 08:59:27,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 08:59:27,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 08:59:27,338 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 08:59:27,347 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,350 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,368 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-09-13 08:59:27,368 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,381 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,387 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 08:59:27,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 08:59:27,393 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 08:59:27,393 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 08:59:27,394 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (1/1) ... [2024-09-13 08:59:27,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:59:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:27,431 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) [2024-09-13 08:59:27,434 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 [2024-09-13 08:59:27,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 08:59:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 08:59:27,489 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 08:59:27,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 08:59:27,489 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 08:59:27,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 08:59:27,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-13 08:59:27,490 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-09-13 08:59:27,490 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-09-13 08:59:27,490 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-09-13 08:59:27,490 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-09-13 08:59:27,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-13 08:59:27,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-13 08:59:27,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 08:59:27,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 08:59:27,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-13 08:59:27,491 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2024-09-13 08:59:27,491 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2024-09-13 08:59:27,491 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-09-13 08:59:27,493 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-09-13 08:59:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 08:59:27,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 08:59:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-13 08:59:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-13 08:59:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-13 08:59:27,494 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-13 08:59:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 08:59:27,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 08:59:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-13 08:59:27,607 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 08:59:27,610 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 08:59:27,892 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2024-09-13 08:59:27,892 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 08:59:27,935 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 08:59:27,936 INFO L318 CfgBuilder]: Removed 7 assume(true) statements. [2024-09-13 08:59:27,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:59:27 BoogieIcfgContainer [2024-09-13 08:59:27,936 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 08:59:27,938 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 08:59:27,939 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 08:59:27,942 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 08:59:27,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 08:59:27" (1/3) ... [2024-09-13 08:59:27,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d31a572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:59:27, skipping insertion in model container [2024-09-13 08:59:27,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:59:27" (2/3) ... [2024-09-13 08:59:27,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d31a572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:59:27, skipping insertion in model container [2024-09-13 08:59:27,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:59:27" (3/3) ... [2024-09-13 08:59:27,946 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2024-09-13 08:59:27,968 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 08:59:27,968 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 08:59:28,078 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 08:59:28,088 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;@2bd05a5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 08:59:28,088 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 08:59:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 states have internal predecessors, (52), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 08:59:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 08:59:28,103 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:28,104 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:28,106 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:28,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:28,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1085934665, now seen corresponding path program 1 times [2024-09-13 08:59:28,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:28,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368548838] [2024-09-13 08:59:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:28,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 08:59:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 08:59:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 08:59:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:59:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:59:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 08:59:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 08:59:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:28,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:28,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368548838] [2024-09-13 08:59:28,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368548838] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:59:28,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:59:28,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 08:59:28,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665971036] [2024-09-13 08:59:28,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:59:28,469 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 08:59:28,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:28,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 08:59:28,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:59:28,490 INFO L87 Difference]: Start difference. First operand has 57 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 states have internal predecessors, (52), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 08:59:28,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:28,652 INFO L93 Difference]: Finished difference Result 113 states and 157 transitions. [2024-09-13 08:59:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 08:59:28,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-13 08:59:28,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:28,669 INFO L225 Difference]: With dead ends: 113 [2024-09-13 08:59:28,669 INFO L226 Difference]: Without dead ends: 56 [2024-09-13 08:59:28,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:59:28,675 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:28,676 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 49 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:59:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-13 08:59:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-09-13 08:59:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 08:59:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-09-13 08:59:28,707 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 49 [2024-09-13 08:59:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:28,708 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-09-13 08:59:28,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 08:59:28,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-09-13 08:59:28,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 08:59:28,711 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:28,711 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:28,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 08:59:28,712 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:28,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash -136188297, now seen corresponding path program 1 times [2024-09-13 08:59:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:28,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533153302] [2024-09-13 08:59:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:28,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:29,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:29,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 08:59:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:29,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 08:59:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:29,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 08:59:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:29,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:59:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:29,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:59:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:29,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 08:59:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:29,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 08:59:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:29,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:29,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533153302] [2024-09-13 08:59:29,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533153302] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:59:29,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:59:29,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-13 08:59:29,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237600711] [2024-09-13 08:59:29,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:59:29,092 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 08:59:29,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:29,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 08:59:29,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-13 08:59:29,096 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 08:59:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:29,304 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2024-09-13 08:59:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 08:59:29,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-13 08:59:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:29,310 INFO L225 Difference]: With dead ends: 72 [2024-09-13 08:59:29,310 INFO L226 Difference]: Without dead ends: 57 [2024-09-13 08:59:29,311 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-13 08:59:29,312 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:29,314 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 167 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:59:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-13 08:59:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-09-13 08:59:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 08:59:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-09-13 08:59:29,326 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 49 [2024-09-13 08:59:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:29,326 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-09-13 08:59:29,327 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 08:59:29,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-09-13 08:59:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-13 08:59:29,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:29,329 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:29,329 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 08:59:29,329 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:29,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:29,329 INFO L85 PathProgramCache]: Analyzing trace with hash -963858507, now seen corresponding path program 1 times [2024-09-13 08:59:29,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:29,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889147434] [2024-09-13 08:59:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:29,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 08:59:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 08:59:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 08:59:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:59:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:59:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 08:59:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 08:59:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:30,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:30,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889147434] [2024-09-13 08:59:30,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889147434] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:30,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122323302] [2024-09-13 08:59:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:30,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:30,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:30,209 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) [2024-09-13 08:59:30,211 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 08:59:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-13 08:59:30,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:30,471 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 16 treesize of output 12 [2024-09-13 08:59:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:30,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:30,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-09-13 08:59:30,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-09-13 08:59:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:30,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122323302] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:30,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:30,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 27 [2024-09-13 08:59:30,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58441309] [2024-09-13 08:59:30,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:30,943 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-13 08:59:30,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-13 08:59:30,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2024-09-13 08:59:30,946 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 8 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 08:59:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:31,924 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2024-09-13 08:59:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 08:59:31,925 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 8 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 50 [2024-09-13 08:59:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:31,927 INFO L225 Difference]: With dead ends: 102 [2024-09-13 08:59:31,928 INFO L226 Difference]: Without dead ends: 100 [2024-09-13 08:59:31,929 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=1942, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 08:59:31,930 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 142 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:31,932 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 297 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:59:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-13 08:59:31,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2024-09-13 08:59:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 57 states have internal predecessors, (68), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (18), 12 states have call predecessors, (18), 13 states have call successors, (18) [2024-09-13 08:59:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2024-09-13 08:59:31,963 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 50 [2024-09-13 08:59:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:31,964 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2024-09-13 08:59:31,966 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 8 states have call successors, (18), 6 states have call predecessors, (18), 7 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 08:59:31,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:31,966 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2024-09-13 08:59:31,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-13 08:59:31,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:31,968 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:31,986 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 08:59:32,168 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 [2024-09-13 08:59:32,169 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:32,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:32,169 INFO L85 PathProgramCache]: Analyzing trace with hash 384710234, now seen corresponding path program 1 times [2024-09-13 08:59:32,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:32,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63621926] [2024-09-13 08:59:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:32,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:32,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:32,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 08:59:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:32,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 08:59:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:32,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 08:59:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:32,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:59:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:32,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:59:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:32,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 08:59:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:32,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 08:59:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 08:59:32,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:32,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63621926] [2024-09-13 08:59:32,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63621926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:32,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817887239] [2024-09-13 08:59:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:32,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:32,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:32,517 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) [2024-09-13 08:59:32,519 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 08:59:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:32,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 08:59:32,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:59:32,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 08:59:32,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817887239] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:59:32,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 08:59:32,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 14 [2024-09-13 08:59:32,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513337548] [2024-09-13 08:59:32,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:59:32,753 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 08:59:32,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:32,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 08:59:32,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-13 08:59:32,753 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 08:59:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:32,872 INFO L93 Difference]: Finished difference Result 123 states and 156 transitions. [2024-09-13 08:59:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 08:59:32,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2024-09-13 08:59:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:32,874 INFO L225 Difference]: With dead ends: 123 [2024-09-13 08:59:32,874 INFO L226 Difference]: Without dead ends: 102 [2024-09-13 08:59:32,875 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-13 08:59:32,876 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:32,876 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 332 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:59:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-13 08:59:32,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2024-09-13 08:59:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 65 states have internal predecessors, (76), 17 states have call successors, (17), 12 states have call predecessors, (17), 13 states have return successors, (23), 13 states have call predecessors, (23), 14 states have call successors, (23) [2024-09-13 08:59:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2024-09-13 08:59:32,901 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 55 [2024-09-13 08:59:32,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:32,902 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2024-09-13 08:59:32,903 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 08:59:32,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2024-09-13 08:59:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-13 08:59:32,904 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:32,905 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:32,922 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 08:59:33,108 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 [2024-09-13 08:59:33,109 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:33,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash -336622505, now seen corresponding path program 1 times [2024-09-13 08:59:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:33,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987695954] [2024-09-13 08:59:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:33,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 08:59:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 08:59:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 08:59:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:59:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:59:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 08:59:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 08:59:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-13 08:59:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:33,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:33,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987695954] [2024-09-13 08:59:33,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987695954] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:33,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535532222] [2024-09-13 08:59:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:33,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:33,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:33,263 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) [2024-09-13 08:59:33,265 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 08:59:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 08:59:33,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:33,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:33,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535532222] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:33,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:33,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2024-09-13 08:59:33,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926980922] [2024-09-13 08:59:33,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:33,504 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 08:59:33,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 08:59:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-13 08:59:33,505 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-13 08:59:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:33,732 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2024-09-13 08:59:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 08:59:33,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 57 [2024-09-13 08:59:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:33,734 INFO L225 Difference]: With dead ends: 114 [2024-09-13 08:59:33,734 INFO L226 Difference]: Without dead ends: 95 [2024-09-13 08:59:33,734 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-13 08:59:33,735 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:33,735 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 311 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:59:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-13 08:59:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-09-13 08:59:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 67 states have internal predecessors, (78), 19 states have call successors, (19), 13 states have call predecessors, (19), 13 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2024-09-13 08:59:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2024-09-13 08:59:33,753 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 57 [2024-09-13 08:59:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:33,753 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2024-09-13 08:59:33,754 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 6 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-13 08:59:33,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2024-09-13 08:59:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 08:59:33,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:33,756 INFO L216 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:33,774 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 08:59:33,956 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 [2024-09-13 08:59:33,957 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:33,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:33,958 INFO L85 PathProgramCache]: Analyzing trace with hash -254005355, now seen corresponding path program 2 times [2024-09-13 08:59:33,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:33,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346678406] [2024-09-13 08:59:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:33,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 08:59:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 08:59:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 08:59:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:59:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:59:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 08:59:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-13 08:59:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-13 08:59:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:59:34,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:34,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346678406] [2024-09-13 08:59:34,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346678406] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:34,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802056393] [2024-09-13 08:59:34,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:59:34,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:34,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:34,129 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) [2024-09-13 08:59:34,130 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 08:59:34,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:59:34,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:34,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 08:59:34,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 08:59:34,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 08:59:34,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802056393] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:59:34,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 08:59:34,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2024-09-13 08:59:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870719533] [2024-09-13 08:59:34,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:59:34,319 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 08:59:34,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:34,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 08:59:34,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-13 08:59:34,320 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-13 08:59:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:34,422 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2024-09-13 08:59:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 08:59:34,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-13 08:59:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:34,424 INFO L225 Difference]: With dead ends: 114 [2024-09-13 08:59:34,424 INFO L226 Difference]: Without dead ends: 93 [2024-09-13 08:59:34,425 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:59:34,426 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:34,426 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 258 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:59:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-13 08:59:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2024-09-13 08:59:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 62 states have internal predecessors, (73), 18 states have call successors, (18), 13 states have call predecessors, (18), 11 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2024-09-13 08:59:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2024-09-13 08:59:34,452 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 58 [2024-09-13 08:59:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:34,452 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2024-09-13 08:59:34,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-13 08:59:34,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2024-09-13 08:59:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 08:59:34,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:34,453 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:34,474 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 08:59:34,654 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 [2024-09-13 08:59:34,654 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:34,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash -764459887, now seen corresponding path program 1 times [2024-09-13 08:59:34,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:34,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32293683] [2024-09-13 08:59:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 08:59:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 08:59:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 08:59:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:59:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:59:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 08:59:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 08:59:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:59:34,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:34,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32293683] [2024-09-13 08:59:34,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32293683] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:34,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942004058] [2024-09-13 08:59:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:34,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:34,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:34,871 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) [2024-09-13 08:59:34,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 08:59:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 08:59:34,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:59:35,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:59:35,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942004058] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:35,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:35,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2024-09-13 08:59:35,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188779777] [2024-09-13 08:59:35,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:35,381 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 08:59:35,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:35,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 08:59:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:59:35,382 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 08:59:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:35,681 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2024-09-13 08:59:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 08:59:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2024-09-13 08:59:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:35,682 INFO L225 Difference]: With dead ends: 118 [2024-09-13 08:59:35,683 INFO L226 Difference]: Without dead ends: 95 [2024-09-13 08:59:35,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2024-09-13 08:59:35,684 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:35,684 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 206 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:59:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-13 08:59:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2024-09-13 08:59:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 58 states have internal predecessors, (68), 18 states have call successors, (18), 12 states have call predecessors, (18), 10 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2024-09-13 08:59:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-09-13 08:59:35,702 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 58 [2024-09-13 08:59:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:35,702 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-09-13 08:59:35,702 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 08:59:35,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-09-13 08:59:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 08:59:35,703 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:35,704 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:35,721 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 08:59:35,907 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 08:59:35,908 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:35,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1823892196, now seen corresponding path program 1 times [2024-09-13 08:59:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11517731] [2024-09-13 08:59:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:36,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:36,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 08:59:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:36,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 08:59:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:36,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 08:59:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:36,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:59:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:36,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:59:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:36,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 08:59:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:36,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 08:59:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 08:59:36,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:36,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11517731] [2024-09-13 08:59:36,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11517731] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:36,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601774095] [2024-09-13 08:59:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:36,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:36,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:36,091 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) [2024-09-13 08:59:36,097 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 08:59:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:36,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 08:59:36,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 08:59:36,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 08:59:36,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601774095] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:36,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:36,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 12 [2024-09-13 08:59:36,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597830669] [2024-09-13 08:59:36,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:36,356 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 08:59:36,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 08:59:36,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:59:36,358 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-13 08:59:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:36,538 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2024-09-13 08:59:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 08:59:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-13 08:59:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:36,540 INFO L225 Difference]: With dead ends: 104 [2024-09-13 08:59:36,540 INFO L226 Difference]: Without dead ends: 75 [2024-09-13 08:59:36,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-09-13 08:59:36,541 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:36,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 151 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:59:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-13 08:59:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-09-13 08:59:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 49 states have internal predecessors, (58), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-13 08:59:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2024-09-13 08:59:36,556 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 58 [2024-09-13 08:59:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:36,556 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2024-09-13 08:59:36,557 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-13 08:59:36,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2024-09-13 08:59:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 08:59:36,558 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:36,558 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:36,575 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 08:59:36,759 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:36,760 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:36,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:36,760 INFO L85 PathProgramCache]: Analyzing trace with hash 90056550, now seen corresponding path program 2 times [2024-09-13 08:59:36,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:36,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222860824] [2024-09-13 08:59:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:36,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 08:59:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 08:59:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 08:59:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:59:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:59:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 08:59:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 08:59:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 08:59:37,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:37,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222860824] [2024-09-13 08:59:37,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222860824] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:37,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003099676] [2024-09-13 08:59:37,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:59:37,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:37,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:37,983 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) [2024-09-13 08:59:37,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 08:59:38,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:59:38,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:38,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 08:59:38,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:38,386 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 16 treesize of output 12 [2024-09-13 08:59:38,612 INFO L349 Elim1Store]: treesize reduction 82, result has 28.7 percent of original size [2024-09-13 08:59:38,612 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 4 case distinctions, treesize of input 63 treesize of output 50 [2024-09-13 08:59:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 08:59:39,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:39,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 08:59:39,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 136 treesize of output 144 [2024-09-13 08:59:39,537 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:39,537 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:39,540 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-09-13 08:59:39,554 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:39,555 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:39,557 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:39,559 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:39,996 INFO L349 Elim1Store]: treesize reduction 384, result has 42.4 percent of original size [2024-09-13 08:59:39,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 237 treesize of output 831 [2024-09-13 08:59:40,117 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 140 treesize of output 119 [2024-09-13 08:59:40,213 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 38 treesize of output 32 [2024-09-13 08:59:42,377 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,379 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,383 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,398 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,441 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,443 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,444 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,447 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,452 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,455 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,460 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 08:59:42,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-13 09:02:29,016 WARN L293 SmtUtils]: Spent 2.77m on a formula simplification. DAG size of input: 815 DAG size of output: 404 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-09-13 09:02:29,017 INFO L349 Elim1Store]: treesize reduction 3942, result has 30.2 percent of original size [2024-09-13 09:02:29,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 15 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 19 new quantified variables, introduced 142 case distinctions, treesize of input 7131 treesize of output 17311