./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 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 18:57:19,464 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:57:19,531 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:57:19,536 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:57:19,537 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:57:19,560 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:57:19,561 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:57:19,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:57:19,563 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:57:19,563 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:57:19,563 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:57:19,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:57:19,564 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:57:19,564 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:57:19,565 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:57:19,565 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:57:19,568 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:57:19,568 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:57:19,569 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:57:19,569 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:57:19,569 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:57:19,570 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:57:19,570 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:57:19,570 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:57:19,570 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:57:19,571 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:57:19,571 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:57:19,571 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:57:19,571 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:57:19,572 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:57:19,572 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:57:19,572 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:57:19,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:57:19,573 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:57:19,573 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:57:19,573 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:57:19,574 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:57:19,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:57:19,574 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:57:19,574 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:57:19,575 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:57:19,578 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:57:19,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:57:19,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:57:19,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:57:19,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:57:19,902 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:57:19,902 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:57:19,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-09-15 18:57:21,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:57:21,495 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:57:21,495 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_iter.c [2024-09-15 18:57:21,502 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/35502f4f5/5aba87f467964e1d81d37659b4ebb947/FLAG4a5973937 [2024-09-15 18:57:21,909 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/35502f4f5/5aba87f467964e1d81d37659b4ebb947 [2024-09-15 18:57:21,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:57:21,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:57:21,915 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:57:21,915 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:57:21,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:57:21,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:57:21" (1/1) ... [2024-09-15 18:57:21,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57cda4ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:21, skipping insertion in model container [2024-09-15 18:57:21,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:57:21" (1/1) ... [2024-09-15 18:57:21,945 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:57:22,081 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2024-09-15 18:57:22,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:57:22,125 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:57:22,134 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2024-09-15 18:57:22,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:57:22,166 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:57:22,167 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22 WrapperNode [2024-09-15 18:57:22,167 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:57:22,168 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:57:22,168 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:57:22,168 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:57:22,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,184 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,191 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:57:22,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:57:22,193 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:57:22,193 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:57:22,193 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:57:22,201 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,207 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,228 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]. [2024-09-15 18:57:22,228 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,237 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,244 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,251 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:57:22,251 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:57:22,254 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:57:22,254 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:57:22,255 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (1/1) ... [2024-09-15 18:57:22,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:57:22,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:22,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-15 18:57:22,293 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-15 18:57:22,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:57:22,346 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 18:57:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 18:57:22,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:57:22,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:57:22,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:57:22,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 18:57:22,346 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-09-15 18:57:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-09-15 18:57:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-09-15 18:57:22,348 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-09-15 18:57:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 18:57:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 18:57:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:57:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:57:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-15 18:57:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2024-09-15 18:57:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2024-09-15 18:57:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-09-15 18:57:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-09-15 18:57:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:57:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:57:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 18:57:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 18:57:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-15 18:57:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-15 18:57:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 18:57:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 18:57:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 18:57:22,438 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:57:22,440 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:57:22,652 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2024-09-15 18:57:22,653 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:57:22,681 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:57:22,681 INFO L318 CfgBuilder]: Removed 7 assume(true) statements. [2024-09-15 18:57:22,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:57:22 BoogieIcfgContainer [2024-09-15 18:57:22,681 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:57:22,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:57:22,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:57:22,686 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:57:22,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:57:21" (1/3) ... [2024-09-15 18:57:22,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44121e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:57:22, skipping insertion in model container [2024-09-15 18:57:22,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:22" (2/3) ... [2024-09-15 18:57:22,691 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44121e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:57:22, skipping insertion in model container [2024-09-15 18:57:22,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:57:22" (3/3) ... [2024-09-15 18:57:22,692 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2024-09-15 18:57:22,706 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:57:22,706 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 18:57:22,751 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:57:22,757 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;@6f056ee8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:57:22,757 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 18:57:22,764 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) [2024-09-15 18:57:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 18:57:22,771 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:22,771 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] [2024-09-15 18:57:22,772 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:22,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1085934665, now seen corresponding path program 1 times [2024-09-15 18:57:22,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:22,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361625042] [2024-09-15 18:57:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:22,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:22,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:22,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:22,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:57:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:22,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:57:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:22,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:57:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:57:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-15 18:57:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:57:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:23,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:23,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361625042] [2024-09-15 18:57:23,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361625042] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:57:23,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:57:23,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 18:57:23,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743165441] [2024-09-15 18:57:23,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:23,038 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 18:57:23,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:23,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 18:57:23,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:57:23,067 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) [2024-09-15 18:57:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:23,157 INFO L93 Difference]: Finished difference Result 113 states and 157 transitions. [2024-09-15 18:57:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 18:57:23,159 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 [2024-09-15 18:57:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:23,169 INFO L225 Difference]: With dead ends: 113 [2024-09-15 18:57:23,170 INFO L226 Difference]: Without dead ends: 56 [2024-09-15 18:57:23,175 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 [2024-09-15 18:57:23,178 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 [2024-09-15 18:57:23,182 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] [2024-09-15 18:57:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-15 18:57:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-09-15 18:57:23,212 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) [2024-09-15 18:57:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-09-15 18:57:23,214 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 49 [2024-09-15 18:57:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:23,215 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-09-15 18:57:23,215 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) [2024-09-15 18:57:23,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-09-15 18:57:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 18:57:23,217 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:23,217 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] [2024-09-15 18:57:23,217 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:57:23,217 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:23,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:23,218 INFO L85 PathProgramCache]: Analyzing trace with hash -136188297, now seen corresponding path program 1 times [2024-09-15 18:57:23,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:23,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282433140] [2024-09-15 18:57:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:23,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:57:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:57:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:57:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:57:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-15 18:57:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:57:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:23,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:23,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282433140] [2024-09-15 18:57:23,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282433140] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:57:23,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:57:23,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 18:57:23,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51640431] [2024-09-15 18:57:23,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:23,461 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:57:23,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:57:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:57:23,462 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) [2024-09-15 18:57:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:23,620 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2024-09-15 18:57:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:57:23,621 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 [2024-09-15 18:57:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:23,622 INFO L225 Difference]: With dead ends: 72 [2024-09-15 18:57:23,622 INFO L226 Difference]: Without dead ends: 57 [2024-09-15 18:57:23,623 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 [2024-09-15 18:57:23,624 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:23,624 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 167 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:57:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-15 18:57:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-09-15 18:57:23,630 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) [2024-09-15 18:57:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-09-15 18:57:23,631 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 49 [2024-09-15 18:57:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:23,632 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-09-15 18:57:23,632 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) [2024-09-15 18:57:23,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-09-15 18:57:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-15 18:57:23,633 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:23,633 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] [2024-09-15 18:57:23,634 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 18:57:23,634 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:23,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash -963858507, now seen corresponding path program 1 times [2024-09-15 18:57:23,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:23,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62348616] [2024-09-15 18:57:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:23,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:24,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:24,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:24,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:57:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:24,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:57:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:24,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:57:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:24,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:57:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:24,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:57:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:24,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 18:57:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:24,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62348616] [2024-09-15 18:57:24,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62348616] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122274363] [2024-09-15 18:57:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:24,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:24,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:24,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:24,268 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 18:57:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:24,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-15 18:57:24,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:24,439 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 [2024-09-15 18:57:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:24,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:24,729 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 [2024-09-15 18:57:24,732 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 [2024-09-15 18:57:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:24,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122274363] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:24,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:24,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 27 [2024-09-15 18:57:24,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187364133] [2024-09-15 18:57:24,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:24,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-15 18:57:24,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-15 18:57:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2024-09-15 18:57:24,827 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) [2024-09-15 18:57:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:25,544 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2024-09-15 18:57:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-15 18:57:25,545 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 [2024-09-15 18:57:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:25,547 INFO L225 Difference]: With dead ends: 102 [2024-09-15 18:57:25,547 INFO L226 Difference]: Without dead ends: 100 [2024-09-15 18:57:25,548 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=1942, Unknown=0, NotChecked=0, Total=2162 [2024-09-15 18:57:25,549 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 142 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:25,549 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 297 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:57:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-15 18:57:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2024-09-15 18:57:25,565 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) [2024-09-15 18:57:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2024-09-15 18:57:25,566 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 50 [2024-09-15 18:57:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:25,566 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2024-09-15 18:57:25,567 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) [2024-09-15 18:57:25,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:25,567 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2024-09-15 18:57:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-15 18:57:25,568 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:25,568 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] [2024-09-15 18:57:25,585 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 18:57:25,772 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:25,773 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:25,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash 384710234, now seen corresponding path program 1 times [2024-09-15 18:57:25,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:25,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847230028] [2024-09-15 18:57:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:25,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:25,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:25,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:25,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:57:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:25,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:57:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:25,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:57:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:25,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:57:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:25,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 18:57:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:25,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:57:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 18:57:26,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:26,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847230028] [2024-09-15 18:57:26,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847230028] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157138651] [2024-09-15 18:57:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:26,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:26,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:26,046 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 18:57:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 18:57:26,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 18:57:26,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 18:57:26,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157138651] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:57:26,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 18:57:26,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 14 [2024-09-15 18:57:26,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445083129] [2024-09-15 18:57:26,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:26,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 18:57:26,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 18:57:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-15 18:57:26,223 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) [2024-09-15 18:57:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:26,318 INFO L93 Difference]: Finished difference Result 123 states and 156 transitions. [2024-09-15 18:57:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 18:57:26,318 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 [2024-09-15 18:57:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:26,319 INFO L225 Difference]: With dead ends: 123 [2024-09-15 18:57:26,320 INFO L226 Difference]: Without dead ends: 102 [2024-09-15 18:57:26,320 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 [2024-09-15 18:57:26,321 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 [2024-09-15 18:57:26,321 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] [2024-09-15 18:57:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-15 18:57:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2024-09-15 18:57:26,334 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) [2024-09-15 18:57:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2024-09-15 18:57:26,335 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 55 [2024-09-15 18:57:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:26,336 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2024-09-15 18:57:26,336 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) [2024-09-15 18:57:26,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2024-09-15 18:57:26,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-15 18:57:26,337 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:26,338 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] [2024-09-15 18:57:26,350 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:26,541 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:26,542 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:26,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash -336622505, now seen corresponding path program 1 times [2024-09-15 18:57:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:26,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838855449] [2024-09-15 18:57:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:26,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:57:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:57:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:57:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:57:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:57:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 18:57:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 18:57:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:26,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:26,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838855449] [2024-09-15 18:57:26,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838855449] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:26,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591970466] [2024-09-15 18:57:26,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:26,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:26,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:26,682 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:26,683 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 18:57:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:26,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 18:57:26,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:26,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:57:26,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591970466] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:26,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:26,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2024-09-15 18:57:26,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381913306] [2024-09-15 18:57:26,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:26,876 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 18:57:26,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 18:57:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:57:26,877 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) [2024-09-15 18:57:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:27,054 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2024-09-15 18:57:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 18:57:27,055 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 [2024-09-15 18:57:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:27,056 INFO L225 Difference]: With dead ends: 114 [2024-09-15 18:57:27,056 INFO L226 Difference]: Without dead ends: 95 [2024-09-15 18:57:27,057 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 [2024-09-15 18:57:27,057 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:27,057 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 311 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:57:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-15 18:57:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-09-15 18:57:27,069 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) [2024-09-15 18:57:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2024-09-15 18:57:27,070 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 57 [2024-09-15 18:57:27,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:27,071 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2024-09-15 18:57:27,071 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) [2024-09-15 18:57:27,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2024-09-15 18:57:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 18:57:27,072 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:27,072 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] [2024-09-15 18:57:27,084 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 18:57:27,273 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:27,274 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:27,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:27,274 INFO L85 PathProgramCache]: Analyzing trace with hash -254005355, now seen corresponding path program 2 times [2024-09-15 18:57:27,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:27,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358243200] [2024-09-15 18:57:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:27,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:57:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:57:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:57:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:57:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 18:57:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-15 18:57:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-15 18:57:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:57:27,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:27,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358243200] [2024-09-15 18:57:27,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358243200] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:27,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19773440] [2024-09-15 18:57:27,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:57:27,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:27,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:27,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:27,424 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 18:57:27,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:57:27,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:27,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 18:57:27,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-15 18:57:27,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 18:57:27,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19773440] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:57:27,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 18:57:27,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2024-09-15 18:57:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973552555] [2024-09-15 18:57:27,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:27,583 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 18:57:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 18:57:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:57:27,585 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) [2024-09-15 18:57:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:27,676 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2024-09-15 18:57:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 18:57:27,677 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 [2024-09-15 18:57:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:27,678 INFO L225 Difference]: With dead ends: 114 [2024-09-15 18:57:27,681 INFO L226 Difference]: Without dead ends: 93 [2024-09-15 18:57:27,681 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 [2024-09-15 18:57:27,682 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 [2024-09-15 18:57:27,682 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] [2024-09-15 18:57:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-15 18:57:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2024-09-15 18:57:27,698 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) [2024-09-15 18:57:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2024-09-15 18:57:27,699 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 58 [2024-09-15 18:57:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:27,702 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2024-09-15 18:57:27,702 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) [2024-09-15 18:57:27,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2024-09-15 18:57:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 18:57:27,703 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:27,703 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] [2024-09-15 18:57:27,718 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 18:57:27,907 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:27,908 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:27,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash -764459887, now seen corresponding path program 1 times [2024-09-15 18:57:27,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:27,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128223602] [2024-09-15 18:57:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:27,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:28,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:28,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:28,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:57:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:28,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:57:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:28,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:57:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:28,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:57:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:28,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 18:57:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:28,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:57:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:57:28,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:28,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128223602] [2024-09-15 18:57:28,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128223602] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:28,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458479226] [2024-09-15 18:57:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:28,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:28,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:28,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:28,097 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 18:57:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:28,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 18:57:28,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:57:28,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:57:28,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458479226] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:28,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:28,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2024-09-15 18:57:28,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241343336] [2024-09-15 18:57:28,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:28,484 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 18:57:28,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:28,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 18:57:28,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-15 18:57:28,485 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) [2024-09-15 18:57:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:28,720 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2024-09-15 18:57:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 18:57:28,720 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 [2024-09-15 18:57:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:28,721 INFO L225 Difference]: With dead ends: 118 [2024-09-15 18:57:28,721 INFO L226 Difference]: Without dead ends: 95 [2024-09-15 18:57:28,722 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2024-09-15 18:57:28,723 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-15 18:57:28,723 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] [2024-09-15 18:57:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-15 18:57:28,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2024-09-15 18:57:28,740 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) [2024-09-15 18:57:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-09-15 18:57:28,741 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 58 [2024-09-15 18:57:28,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:28,741 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-09-15 18:57:28,741 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) [2024-09-15 18:57:28,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-09-15 18:57:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 18:57:28,742 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:28,742 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] [2024-09-15 18:57:28,754 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 18:57:28,944 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 [2024-09-15 18:57:28,944 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:28,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:28,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1823892196, now seen corresponding path program 1 times [2024-09-15 18:57:28,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:28,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322038897] [2024-09-15 18:57:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:28,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:57:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:57:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:57:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:57:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:57:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 18:57:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-15 18:57:29,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:29,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322038897] [2024-09-15 18:57:29,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322038897] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:29,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945434785] [2024-09-15 18:57:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:29,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:29,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:29,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:29,109 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 18:57:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:29,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 18:57:29,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-15 18:57:29,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-15 18:57:29,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945434785] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:29,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:29,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 12 [2024-09-15 18:57:29,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72236785] [2024-09-15 18:57:29,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:29,310 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 18:57:29,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:29,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 18:57:29,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:57:29,311 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) [2024-09-15 18:57:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:29,497 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2024-09-15 18:57:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-15 18:57:29,497 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 [2024-09-15 18:57:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:29,498 INFO L225 Difference]: With dead ends: 104 [2024-09-15 18:57:29,498 INFO L226 Difference]: Without dead ends: 75 [2024-09-15 18:57:29,499 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 [2024-09-15 18:57:29,499 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 [2024-09-15 18:57:29,500 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] [2024-09-15 18:57:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-15 18:57:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-09-15 18:57:29,506 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) [2024-09-15 18:57:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2024-09-15 18:57:29,507 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 58 [2024-09-15 18:57:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:29,507 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2024-09-15 18:57:29,507 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) [2024-09-15 18:57:29,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2024-09-15 18:57:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-15 18:57:29,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:29,511 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] [2024-09-15 18:57:29,527 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 18:57:29,712 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 [2024-09-15 18:57:29,713 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:29,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:29,713 INFO L85 PathProgramCache]: Analyzing trace with hash 90056550, now seen corresponding path program 2 times [2024-09-15 18:57:29,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:29,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235287700] [2024-09-15 18:57:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:29,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:30,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:30,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:30,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:57:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:30,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:57:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:30,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:57:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:30,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:57:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:30,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 18:57:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:30,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:57:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 18:57:30,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:30,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235287700] [2024-09-15 18:57:30,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235287700] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:30,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725531145] [2024-09-15 18:57:30,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:57:30,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:30,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:30,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:57:30,695 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 18:57:30,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:57:30,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:30,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-15 18:57:30,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:31,007 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 [2024-09-15 18:57:31,207 INFO L349 Elim1Store]: treesize reduction 82, result has 28.7 percent of original size [2024-09-15 18:57:31,208 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 [2024-09-15 18:57:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 18:57:31,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:31,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 18:57:31,936 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 [2024-09-15 18:57:31,953 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:31,954 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:31,955 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:31,956 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:32,308 INFO L349 Elim1Store]: treesize reduction 384, result has 42.4 percent of original size [2024-09-15 18:57:32,308 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 [2024-09-15 18:57:32,377 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 [2024-09-15 18:57:32,453 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 [2024-09-15 18:57:34,591 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,597 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,599 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,601 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,607 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,657 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,661 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,662 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,664 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,669 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,670 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,674 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-15 18:57:34,703 INFO L190 IndexEqualityManager]: detected not equals via solver