./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/id_i20_o20-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/id_i20_o20-1.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 10:28:03,481 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 10:28:03,545 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 10:28:03,548 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 10:28:03,549 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 10:28:03,583 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 10:28:03,585 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 10:28:03,586 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 10:28:03,586 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 10:28:03,590 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 10:28:03,600 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 10:28:03,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 10:28:03,600 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 10:28:03,601 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 10:28:03,601 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 10:28:03,601 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 10:28:03,601 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 10:28:03,601 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 10:28:03,601 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 10:28:03,601 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 10:28:03,602 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 10:28:03,604 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 10:28:03,604 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 10:28:03,604 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 10:28:03,605 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 10:28:03,605 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 10:28:03,605 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 10:28:03,605 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 10:28:03,605 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 10:28:03,606 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 10:28:03,606 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 10:28:03,606 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 10:28:03,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:28:03,606 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 10:28:03,606 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 10:28:03,607 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 10:28:03,607 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 10:28:03,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 10:28:03,608 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 10:28:03,608 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 10:28:03,608 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 10:28:03,608 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 10:28:03,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 10:28:03,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 10:28:03,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 10:28:03,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 10:28:03,843 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 10:28:03,843 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 10:28:03,844 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-13 10:28:05,195 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 10:28:05,376 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 10:28:05,376 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-13 10:28:05,384 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/77defb7e0/950a10dee74640cd810787a79ea3c858/FLAG8308ff240 [2024-09-13 10:28:05,395 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/77defb7e0/950a10dee74640cd810787a79ea3c858 [2024-09-13 10:28:05,397 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 10:28:05,398 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 10:28:05,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/id_i20_o20-1.yml/witness-2.1.yml [2024-09-13 10:28:05,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 10:28:05,439 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 10:28:05,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 10:28:05,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 10:28:05,444 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 10:28:05,444 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:28:05" (1/2) ... [2024-09-13 10:28:05,445 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57887a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:28:05, skipping insertion in model container [2024-09-13 10:28:05,445 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:28:05" (1/2) ... [2024-09-13 10:28:05,451 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20d44a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:28:05, skipping insertion in model container [2024-09-13 10:28:05,452 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:28:05" (2/2) ... [2024-09-13 10:28:05,452 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57887a5a and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05, skipping insertion in model container [2024-09-13 10:28:05,452 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:28:05" (2/2) ... [2024-09-13 10:28:05,457 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 10:28:05,458 INFO L1541 ArrayList]: Function contract at [L6]: requires null, ensures (((((((((((((((((((((((3 == \result) && (\old(x) == 3)) || ((19 == \result) && (19 == \old(x)))) || ((11 == \result) && (\old(x) == 11))) || ((\old(x) == 6) && (6 == \result))) || ((9 == \result) && (\old(x) == 9))) || ((\old(x) == 17) && (17 == \result))) || ((\old(x) == 18) && (18 == \result))) || ((2 == \result) && (\old(x) == 2))) || (20 < \old(x))) || ((10 == \result) && (\old(x) == 10))) || ((5 == \result) && (5 == \old(x)))) || ((20 == \result) && (\old(x) == 20))) || ((8 == \result) && (\old(x) == 8))) || ((7 == \result) && (7 == \old(x)))) || ((12 == \result) && (\old(x) == 12))) || ((\result == 1) && (\old(x) == 1))) || ((14 == \result) && (\old(x) == 14))) || ((\old(x) == 4) && (4 == \result))) || ((\old(x) == 15) && (15 == \result))) || ((13 == \result) && (\old(x) == 13))) || ((\old(x) == 16) && (16 == \result))) || ((\result == 0) && (\old(x) == 0))) [2024-09-13 10:28:05,470 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 10:28:05,582 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c[454,467] [2024-09-13 10:28:05,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:28:05,596 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-13 10:28:05,639 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c[454,467] [2024-09-13 10:28:05,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:28:05,651 INFO L204 MainTranslator]: Completed translation [2024-09-13 10:28:05,652 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05 WrapperNode [2024-09-13 10:28:05,652 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 10:28:05,653 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 10:28:05,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 10:28:05,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 10:28:05,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,664 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,679 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-09-13 10:28:05,680 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 10:28:05,680 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 10:28:05,681 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 10:28:05,681 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 10:28:05,688 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,689 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,696 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure id is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-13 10:28:05,697 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,697 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,701 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,702 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,707 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,708 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,709 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 10:28:05,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 10:28:05,710 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 10:28:05,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 10:28:05,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (1/1) ... [2024-09-13 10:28:05,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:28:05,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:05,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 10:28:05,740 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 10:28:05,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 10:28:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 10:28:05,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 10:28:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 10:28:05,775 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-13 10:28:05,775 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-13 10:28:05,823 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 10:28:05,825 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 10:28:05,941 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-13 10:28:05,941 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 10:28:05,963 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 10:28:05,964 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 10:28:05,964 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:28:05 BoogieIcfgContainer [2024-09-13 10:28:05,964 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 10:28:05,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 10:28:05,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 10:28:05,969 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 10:28:05,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:28:05" (1/4) ... [2024-09-13 10:28:05,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3faba8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:28:05, skipping insertion in model container [2024-09-13 10:28:05,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:28:05" (2/4) ... [2024-09-13 10:28:05,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3faba8fc and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:28:05, skipping insertion in model container [2024-09-13 10:28:05,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:28:05" (3/4) ... [2024-09-13 10:28:05,971 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3faba8fc and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:28:05, skipping insertion in model container [2024-09-13 10:28:05,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:28:05" (4/4) ... [2024-09-13 10:28:05,972 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2024-09-13 10:28:05,986 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 10:28:05,986 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-13 10:28:06,021 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 10:28:06,026 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=None, 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;@487ab558, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 10:28:06,027 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-13 10:28:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 10:28:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 10:28:06,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:06,035 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 10:28:06,036 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:06,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:06,041 INFO L85 PathProgramCache]: Analyzing trace with hash 56172024, now seen corresponding path program 1 times [2024-09-13 10:28:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685166816] [2024-09-13 10:28:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:06,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:06,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:06,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685166816] [2024-09-13 10:28:06,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685166816] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:28:06,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:28:06,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 10:28:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137460659] [2024-09-13 10:28:06,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:28:06,273 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:28:06,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:06,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:28:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:28:06,308 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:28:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:06,383 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-09-13 10:28:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:28:06,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-13 10:28:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:06,398 INFO L225 Difference]: With dead ends: 22 [2024-09-13 10:28:06,399 INFO L226 Difference]: Without dead ends: 20 [2024-09-13 10:28:06,400 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:28:06,407 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:06,409 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:28:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-13 10:28:06,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-09-13 10:28:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 10:28:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-09-13 10:28:06,460 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2024-09-13 10:28:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:06,461 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-09-13 10:28:06,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:28:06,462 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-09-13 10:28:06,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-13 10:28:06,463 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:06,463 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:28:06,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 10:28:06,464 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:06,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:06,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1615449573, now seen corresponding path program 1 times [2024-09-13 10:28:06,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:06,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228363642] [2024-09-13 10:28:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:06,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:06,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228363642] [2024-09-13 10:28:06,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228363642] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:06,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735378708] [2024-09-13 10:28:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:06,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:06,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:06,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:06,626 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 10:28:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:06,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 10:28:06,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:06,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:06,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735378708] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:06,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:06,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-13 10:28:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314495009] [2024-09-13 10:28:06,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:06,789 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 10:28:06,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 10:28:06,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-13 10:28:06,792 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 10 states have (on average 1.1) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:28:06,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:06,939 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2024-09-13 10:28:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 10:28:06,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.1) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-13 10:28:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:06,940 INFO L225 Difference]: With dead ends: 41 [2024-09-13 10:28:06,940 INFO L226 Difference]: Without dead ends: 41 [2024-09-13 10:28:06,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:28:06,941 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:06,941 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 69 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:28:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-13 10:28:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-09-13 10:28:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 10:28:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-09-13 10:28:06,949 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2024-09-13 10:28:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:06,950 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-09-13 10:28:06,950 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.1) internal successors, (11), 7 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:28:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-09-13 10:28:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 10:28:06,951 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:06,951 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2024-09-13 10:28:06,968 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 10:28:07,155 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:07,156 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:07,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:07,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1295816760, now seen corresponding path program 2 times [2024-09-13 10:28:07,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:07,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363822697] [2024-09-13 10:28:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:07,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:07,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:07,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363822697] [2024-09-13 10:28:07,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363822697] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:07,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575586002] [2024-09-13 10:28:07,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:28:07,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:07,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:07,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:07,360 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 10:28:07,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 10:28:07,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:07,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 10:28:07,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 10:28:07,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:28:07,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575586002] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:28:07,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:28:07,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 15 [2024-09-13 10:28:07,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178729163] [2024-09-13 10:28:07,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:28:07,426 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:28:07,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:07,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:28:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-13 10:28:07,427 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:28:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:07,458 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-09-13 10:28:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:28:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-09-13 10:28:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:07,460 INFO L225 Difference]: With dead ends: 39 [2024-09-13 10:28:07,461 INFO L226 Difference]: Without dead ends: 39 [2024-09-13 10:28:07,461 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-13 10:28:07,462 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:07,462 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:28:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-13 10:28:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-09-13 10:28:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 10:28:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-13 10:28:07,472 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 17 [2024-09-13 10:28:07,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:07,472 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-13 10:28:07,473 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:28:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-13 10:28:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 10:28:07,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:07,473 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:28:07,487 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:07,678 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:07,679 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:07,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash 511038535, now seen corresponding path program 1 times [2024-09-13 10:28:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:07,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352427199] [2024-09-13 10:28:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:07,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 10:28:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:07,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:07,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352427199] [2024-09-13 10:28:07,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352427199] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:07,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830951516] [2024-09-13 10:28:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:07,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:07,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:07,882 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 10:28:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 10:28:07,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:07,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:08,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830951516] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:08,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:08,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-13 10:28:08,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474203146] [2024-09-13 10:28:08,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:08,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 10:28:08,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 10:28:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:28:08,171 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 16 states have internal predecessors, (28), 10 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 10:28:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:08,544 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2024-09-13 10:28:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 10:28:08,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 16 states have internal predecessors, (28), 10 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-09-13 10:28:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:08,546 INFO L225 Difference]: With dead ends: 71 [2024-09-13 10:28:08,548 INFO L226 Difference]: Without dead ends: 71 [2024-09-13 10:28:08,548 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 10:28:08,549 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:08,552 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 120 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:28:08,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-13 10:28:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-09-13 10:28:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 43 states have internal predecessors, (51), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-13 10:28:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-09-13 10:28:08,560 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 20 [2024-09-13 10:28:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:08,561 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-09-13 10:28:08,561 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 16 states have internal predecessors, (28), 10 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 10:28:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-09-13 10:28:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 10:28:08,562 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:08,562 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:28:08,585 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 10:28:08,762 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:08,763 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:08,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1809419033, now seen corresponding path program 2 times [2024-09-13 10:28:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:08,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146437624] [2024-09-13 10:28:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:08,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:09,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 10:28:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146437624] [2024-09-13 10:28:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146437624] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792492294] [2024-09-13 10:28:09,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:28:09,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:09,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:09,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:09,133 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 10:28:09,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:28:09,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:09,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 10:28:09,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:09,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:09,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792492294] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:09,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:09,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2024-09-13 10:28:09,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999724246] [2024-09-13 10:28:09,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:09,741 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 10:28:09,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:09,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 10:28:09,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 10:28:09,744 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 21 states have call successors, (22), 20 states have call predecessors, (22), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 10:28:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:10,537 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2024-09-13 10:28:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-13 10:28:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 21 states have call successors, (22), 20 states have call predecessors, (22), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-09-13 10:28:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:10,538 INFO L225 Difference]: With dead ends: 148 [2024-09-13 10:28:10,539 INFO L226 Difference]: Without dead ends: 148 [2024-09-13 10:28:10,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1129, Invalid=3293, Unknown=0, NotChecked=0, Total=4422 [2024-09-13 10:28:10,540 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 259 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:10,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 228 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 10:28:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-09-13 10:28:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 129. [2024-09-13 10:28:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 87 states have internal predecessors, (106), 21 states have call successors, (21), 20 states have call predecessors, (21), 21 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2024-09-13 10:28:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2024-09-13 10:28:10,551 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 38 [2024-09-13 10:28:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:10,552 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2024-09-13 10:28:10,552 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 21 states have call successors, (22), 20 states have call predecessors, (22), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 10:28:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2024-09-13 10:28:10,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 10:28:10,556 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:10,556 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:28:10,570 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 10:28:10,759 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:10,760 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:10,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:10,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1369371833, now seen corresponding path program 3 times [2024-09-13 10:28:10,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:10,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120867720] [2024-09-13 10:28:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:10,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:11,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-13 10:28:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:28:11,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:11,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120867720] [2024-09-13 10:28:11,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120867720] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:11,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275592398] [2024-09-13 10:28:11,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:28:11,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:11,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:11,842 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:11,843 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 10:28:11,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 10:28:11,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:11,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 10:28:11,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2024-09-13 10:28:11,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-09-13 10:28:12,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275592398] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:12,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:12,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 5, 6] total 47 [2024-09-13 10:28:12,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168462996] [2024-09-13 10:28:12,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:12,038 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 10:28:12,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:12,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 10:28:12,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 10:28:12,040 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 48 states, 46 states have (on average 1.173913043478261) internal successors, (54), 28 states have internal predecessors, (54), 24 states have call successors, (25), 21 states have call predecessors, (25), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 10:28:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:13,988 INFO L93 Difference]: Finished difference Result 215 states and 237 transitions. [2024-09-13 10:28:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-13 10:28:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.173913043478261) internal successors, (54), 28 states have internal predecessors, (54), 24 states have call successors, (25), 21 states have call predecessors, (25), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2024-09-13 10:28:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:13,990 INFO L225 Difference]: With dead ends: 215 [2024-09-13 10:28:13,990 INFO L226 Difference]: Without dead ends: 215 [2024-09-13 10:28:13,992 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=294, Invalid=4536, Unknown=0, NotChecked=0, Total=4830 [2024-09-13 10:28:13,992 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 288 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 5111 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 5280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 5111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:13,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 871 Invalid, 5280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 5111 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-13 10:28:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-13 10:28:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 194. [2024-09-13 10:28:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 129 states have (on average 1.317829457364341) internal successors, (170), 130 states have internal predecessors, (170), 22 states have call successors, (22), 21 states have call predecessors, (22), 41 states have return successors, (44), 42 states have call predecessors, (44), 22 states have call successors, (44) [2024-09-13 10:28:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 236 transitions. [2024-09-13 10:28:14,012 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 236 transitions. Word has length 68 [2024-09-13 10:28:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:14,013 INFO L474 AbstractCegarLoop]: Abstraction has 194 states and 236 transitions. [2024-09-13 10:28:14,013 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.173913043478261) internal successors, (54), 28 states have internal predecessors, (54), 24 states have call successors, (25), 21 states have call predecessors, (25), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 10:28:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 236 transitions. [2024-09-13 10:28:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 10:28:14,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:14,015 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 10:28:14,027 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 10:28:14,219 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 10:28:14,220 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:14,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1356901672, now seen corresponding path program 4 times [2024-09-13 10:28:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:14,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989646318] [2024-09-13 10:28:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:14,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:15,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-13 10:28:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:15,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 1 proven. 613 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:28:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989646318] [2024-09-13 10:28:15,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989646318] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216300021] [2024-09-13 10:28:15,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 10:28:15,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:15,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:15,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:15,313 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 10:28:15,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 10:28:15,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:15,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-13 10:28:15,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 90 proven. 5 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2024-09-13 10:28:15,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 90 proven. 9 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2024-09-13 10:28:15,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216300021] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:15,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:15,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 9] total 50 [2024-09-13 10:28:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80040752] [2024-09-13 10:28:15,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:15,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-13 10:28:15,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-13 10:28:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2024-09-13 10:28:15,666 INFO L87 Difference]: Start difference. First operand 194 states and 236 transitions. Second operand has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 30 states have internal predecessors, (58), 24 states have call successors, (25), 20 states have call predecessors, (25), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 10:28:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:17,333 INFO L93 Difference]: Finished difference Result 216 states and 238 transitions. [2024-09-13 10:28:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-13 10:28:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 30 states have internal predecessors, (58), 24 states have call successors, (25), 20 states have call predecessors, (25), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 71 [2024-09-13 10:28:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:17,335 INFO L225 Difference]: With dead ends: 216 [2024-09-13 10:28:17,337 INFO L226 Difference]: Without dead ends: 216 [2024-09-13 10:28:17,338 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=5051, Unknown=0, NotChecked=0, Total=5402 [2024-09-13 10:28:17,339 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 294 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 4975 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 5124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 4975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:17,339 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 790 Invalid, 5124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 4975 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-13 10:28:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-09-13 10:28:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2024-09-13 10:28:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 131 states have (on average 1.3053435114503817) internal successors, (171), 132 states have internal predecessors, (171), 22 states have call successors, (22), 21 states have call predecessors, (22), 42 states have return successors, (45), 43 states have call predecessors, (45), 22 states have call successors, (45) [2024-09-13 10:28:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 238 transitions. [2024-09-13 10:28:17,356 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 238 transitions. Word has length 71 [2024-09-13 10:28:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:17,356 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 238 transitions. [2024-09-13 10:28:17,356 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 30 states have internal predecessors, (58), 24 states have call successors, (25), 20 states have call predecessors, (25), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-13 10:28:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 238 transitions. [2024-09-13 10:28:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-13 10:28:17,357 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:17,357 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 3, 3, 3, 1, 1, 1, 1] [2024-09-13 10:28:17,370 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:17,558 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:17,559 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:17,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:17,559 INFO L85 PathProgramCache]: Analyzing trace with hash 774477223, now seen corresponding path program 5 times [2024-09-13 10:28:17,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:17,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638583651] [2024-09-13 10:28:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:17,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:18,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:28:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:18,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:18,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 2 proven. 615 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 10:28:18,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638583651] [2024-09-13 10:28:18,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638583651] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573681502] [2024-09-13 10:28:18,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 10:28:18,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:18,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:18,495 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:18,496 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 10:28:18,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-09-13 10:28:18,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:18,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-13 10:28:18,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 10:28:18,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 615 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 10:28:18,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573681502] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:18,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:18,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 44] total 47 [2024-09-13 10:28:18,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369745343] [2024-09-13 10:28:18,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:18,815 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 10:28:18,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:18,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 10:28:18,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 10:28:18,816 INFO L87 Difference]: Start difference. First operand 197 states and 238 transitions. Second operand has 48 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 28 states have internal predecessors, (52), 21 states have call successors, (21), 19 states have call predecessors, (21), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 10:28:20,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:20,299 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2024-09-13 10:28:20,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-13 10:28:20,300 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 28 states have internal predecessors, (52), 21 states have call successors, (21), 19 states have call predecessors, (21), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 74 [2024-09-13 10:28:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:20,301 INFO L225 Difference]: With dead ends: 218 [2024-09-13 10:28:20,301 INFO L226 Difference]: Without dead ends: 218 [2024-09-13 10:28:20,302 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=4759, Unknown=0, NotChecked=0, Total=4970 [2024-09-13 10:28:20,302 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 221 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 5162 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 5214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:20,303 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 786 Invalid, 5214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5162 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 10:28:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-13 10:28:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 200. [2024-09-13 10:28:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 133 states have (on average 1.300751879699248) internal successors, (173), 134 states have internal predecessors, (173), 22 states have call successors, (22), 21 states have call predecessors, (22), 43 states have return successors, (46), 44 states have call predecessors, (46), 22 states have call successors, (46) [2024-09-13 10:28:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2024-09-13 10:28:20,314 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 74 [2024-09-13 10:28:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:20,314 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2024-09-13 10:28:20,314 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 28 states have internal predecessors, (52), 21 states have call successors, (21), 19 states have call predecessors, (21), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 10:28:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2024-09-13 10:28:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-13 10:28:20,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:20,315 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 3, 3, 3, 1, 1, 1, 1] [2024-09-13 10:28:20,328 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 10:28:20,515 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:20,516 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:20,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1481278311, now seen corresponding path program 6 times [2024-09-13 10:28:20,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:20,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123293623] [2024-09-13 10:28:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:20,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:21,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-13 10:28:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:21,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:21,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 701 proven. 182 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 10:28:21,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:21,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123293623] [2024-09-13 10:28:21,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123293623] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:21,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377859522] [2024-09-13 10:28:21,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 10:28:21,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:21,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:21,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:21,467 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 10:28:21,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-13 10:28:21,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:21,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-13 10:28:21,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 147 proven. 12 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2024-09-13 10:28:21,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 147 proven. 21 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2024-09-13 10:28:21,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377859522] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:21,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:21,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 12] total 63 [2024-09-13 10:28:21,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361902273] [2024-09-13 10:28:21,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:21,954 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-13 10:28:21,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:21,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-13 10:28:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=3127, Unknown=0, NotChecked=0, Total=3906 [2024-09-13 10:28:21,956 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 38 states have internal predecessors, (75), 28 states have call successors, (29), 23 states have call predecessors, (29), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-13 10:28:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:22,748 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2024-09-13 10:28:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-09-13 10:28:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 38 states have internal predecessors, (75), 28 states have call successors, (29), 23 states have call predecessors, (29), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 86 [2024-09-13 10:28:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:22,750 INFO L225 Difference]: With dead ends: 150 [2024-09-13 10:28:22,750 INFO L226 Difference]: Without dead ends: 147 [2024-09-13 10:28:22,752 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2738 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2931, Invalid=8625, Unknown=0, NotChecked=0, Total=11556 [2024-09-13 10:28:22,752 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 639 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:22,752 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 104 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:28:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-13 10:28:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 131. [2024-09-13 10:28:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 88 states have internal predecessors, (104), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 10:28:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2024-09-13 10:28:22,756 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 86 [2024-09-13 10:28:22,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:22,757 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2024-09-13 10:28:22,757 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 38 states have internal predecessors, (75), 28 states have call successors, (29), 23 states have call predecessors, (29), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-13 10:28:22,757 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2024-09-13 10:28:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-13 10:28:22,758 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:22,758 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 1, 1, 1, 1] [2024-09-13 10:28:22,771 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 10:28:22,958 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:22,959 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:22,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:22,959 INFO L85 PathProgramCache]: Analyzing trace with hash -113365896, now seen corresponding path program 7 times [2024-09-13 10:28:22,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:22,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696859406] [2024-09-13 10:28:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:22,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:23,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 10:28:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:23,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:23,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:23,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 3 proven. 617 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 10:28:23,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696859406] [2024-09-13 10:28:23,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696859406] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787814014] [2024-09-13 10:28:23,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 10:28:23,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:23,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:23,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:23,914 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 10:28:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:23,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-13 10:28:23,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 10:28:24,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 10:28:24,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787814014] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:24,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:24,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-13 10:28:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318589144] [2024-09-13 10:28:24,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:24,148 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 10:28:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 10:28:24,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 10:28:24,149 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 19 states have call successors, (19), 18 states have call predecessors, (19), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 10:28:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:25,606 INFO L93 Difference]: Finished difference Result 146 states and 145 transitions. [2024-09-13 10:28:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-13 10:28:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 19 states have call successors, (19), 18 states have call predecessors, (19), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2024-09-13 10:28:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:25,607 INFO L225 Difference]: With dead ends: 146 [2024-09-13 10:28:25,607 INFO L226 Difference]: Without dead ends: 146 [2024-09-13 10:28:25,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=4898, Unknown=0, NotChecked=0, Total=5112 [2024-09-13 10:28:25,609 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 207 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 4904 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 4953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 4904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:25,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 699 Invalid, 4953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 4904 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 10:28:25,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-13 10:28:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2024-09-13 10:28:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 88 states have internal predecessors, (103), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 10:28:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2024-09-13 10:28:25,613 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 77 [2024-09-13 10:28:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:25,613 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2024-09-13 10:28:25,614 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 19 states have call successors, (19), 18 states have call predecessors, (19), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 10:28:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2024-09-13 10:28:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-13 10:28:25,615 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:25,615 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 1, 1, 1, 1] [2024-09-13 10:28:25,630 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:25,815 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 10:28:25,816 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:25,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1439115257, now seen corresponding path program 8 times [2024-09-13 10:28:25,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:25,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824878187] [2024-09-13 10:28:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:25,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:26,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-13 10:28:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:26,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:26,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:26,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:26,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 4 proven. 619 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 10:28:26,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:26,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824878187] [2024-09-13 10:28:26,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824878187] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:26,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004459474] [2024-09-13 10:28:26,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:28:26,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:26,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:26,832 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:26,833 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 10:28:26,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:28:26,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:26,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-13 10:28:26,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-13 10:28:26,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-13 10:28:27,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004459474] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:27,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:27,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-13 10:28:27,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990739305] [2024-09-13 10:28:27,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:27,135 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 10:28:27,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:27,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 10:28:27,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 10:28:27,136 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 18 states have call successors, (18), 17 states have call predecessors, (18), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 10:28:28,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:28,663 INFO L93 Difference]: Finished difference Result 145 states and 144 transitions. [2024-09-13 10:28:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-13 10:28:28,663 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 18 states have call successors, (18), 17 states have call predecessors, (18), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 80 [2024-09-13 10:28:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:28,664 INFO L225 Difference]: With dead ends: 145 [2024-09-13 10:28:28,664 INFO L226 Difference]: Without dead ends: 145 [2024-09-13 10:28:28,665 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=5039, Unknown=0, NotChecked=0, Total=5256 [2024-09-13 10:28:28,665 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 5052 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 5098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:28,666 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 642 Invalid, 5098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5052 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-13 10:28:28,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-13 10:28:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2024-09-13 10:28:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 88 states have internal predecessors, (102), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 10:28:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2024-09-13 10:28:28,670 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 80 [2024-09-13 10:28:28,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:28,671 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2024-09-13 10:28:28,672 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 18 states have call successors, (18), 17 states have call predecessors, (18), 6 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 10:28:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2024-09-13 10:28:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-13 10:28:28,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:28,676 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 1, 1, 1, 1] [2024-09-13 10:28:28,689 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:28,876 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 10:28:28,877 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:28,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:28,877 INFO L85 PathProgramCache]: Analyzing trace with hash -319074792, now seen corresponding path program 9 times [2024-09-13 10:28:28,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:28,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842991857] [2024-09-13 10:28:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:28,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:29,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-13 10:28:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:29,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:29,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:29,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:29,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:29,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 5 proven. 621 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-13 10:28:29,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:29,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842991857] [2024-09-13 10:28:29,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842991857] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:29,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160022368] [2024-09-13 10:28:29,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:28:29,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:29,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:29,922 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:29,923 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 10:28:29,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-13 10:28:29,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:29,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 10:28:29,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 182 proven. 51 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2024-09-13 10:28:30,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 182 proven. 87 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-13 10:28:30,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160022368] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:30,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:30,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15, 21] total 62 [2024-09-13 10:28:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207389532] [2024-09-13 10:28:30,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:30,863 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-13 10:28:30,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:30,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-13 10:28:30,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3652, Unknown=0, NotChecked=0, Total=3906 [2024-09-13 10:28:30,864 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 63 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 38 states have internal predecessors, (74), 24 states have call successors, (25), 16 states have call predecessors, (25), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-13 10:28:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:32,518 INFO L93 Difference]: Finished difference Result 144 states and 143 transitions. [2024-09-13 10:28:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-13 10:28:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 38 states have internal predecessors, (74), 24 states have call successors, (25), 16 states have call predecessors, (25), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) Word has length 83 [2024-09-13 10:28:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:32,519 INFO L225 Difference]: With dead ends: 144 [2024-09-13 10:28:32,519 INFO L226 Difference]: Without dead ends: 144 [2024-09-13 10:28:32,519 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=579, Invalid=7431, Unknown=0, NotChecked=0, Total=8010 [2024-09-13 10:28:32,520 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 394 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 5028 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 5155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 5028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:32,520 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 542 Invalid, 5155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 5028 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-13 10:28:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-13 10:28:32,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2024-09-13 10:28:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.160919540229885) internal successors, (101), 88 states have internal predecessors, (101), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 10:28:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2024-09-13 10:28:32,523 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 83 [2024-09-13 10:28:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:32,523 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2024-09-13 10:28:32,523 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 38 states have internal predecessors, (74), 24 states have call successors, (25), 16 states have call predecessors, (25), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-13 10:28:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2024-09-13 10:28:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-13 10:28:32,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:32,524 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 7, 7, 7, 1, 1, 1, 1] [2024-09-13 10:28:32,538 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 10:28:32,727 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:32,728 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:32,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:32,728 INFO L85 PathProgramCache]: Analyzing trace with hash -794504601, now seen corresponding path program 10 times [2024-09-13 10:28:32,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:32,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430528022] [2024-09-13 10:28:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:32,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:33,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 10:28:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:33,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:33,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:33,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:33,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:33,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:33,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 6 proven. 623 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 10:28:33,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:33,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430528022] [2024-09-13 10:28:33,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430528022] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:33,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282122491] [2024-09-13 10:28:33,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 10:28:33,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:33,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:33,837 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:33,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 10:28:33,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 10:28:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:33,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 10:28:33,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 195 proven. 70 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2024-09-13 10:28:34,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 195 proven. 119 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-09-13 10:28:34,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282122491] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:34,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:34,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 17, 24] total 65 [2024-09-13 10:28:34,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165943449] [2024-09-13 10:28:34,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:34,983 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-13 10:28:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:34,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-13 10:28:34,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4019, Unknown=0, NotChecked=0, Total=4290 [2024-09-13 10:28:34,984 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 66 states, 64 states have (on average 1.21875) internal successors, (78), 40 states have internal predecessors, (78), 24 states have call successors, (25), 15 states have call predecessors, (25), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2024-09-13 10:28:36,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:36,563 INFO L93 Difference]: Finished difference Result 143 states and 142 transitions. [2024-09-13 10:28:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-13 10:28:36,564 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.21875) internal successors, (78), 40 states have internal predecessors, (78), 24 states have call successors, (25), 15 states have call predecessors, (25), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) Word has length 86 [2024-09-13 10:28:36,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:36,564 INFO L225 Difference]: With dead ends: 143 [2024-09-13 10:28:36,565 INFO L226 Difference]: Without dead ends: 143 [2024-09-13 10:28:36,565 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=636, Invalid=8106, Unknown=0, NotChecked=0, Total=8742 [2024-09-13 10:28:36,566 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 403 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 5324 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 5458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 5324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:36,566 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 507 Invalid, 5458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 5324 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-13 10:28:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-13 10:28:36,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2024-09-13 10:28:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 10:28:36,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2024-09-13 10:28:36,573 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 86 [2024-09-13 10:28:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:36,573 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2024-09-13 10:28:36,575 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.21875) internal successors, (78), 40 states have internal predecessors, (78), 24 states have call successors, (25), 15 states have call predecessors, (25), 13 states have return successors, (21), 13 states have call predecessors, (21), 10 states have call successors, (21) [2024-09-13 10:28:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2024-09-13 10:28:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-13 10:28:36,576 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:36,576 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 1, 1, 1, 1] [2024-09-13 10:28:36,588 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:36,776 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 10:28:36,776 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:36,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:36,777 INFO L85 PathProgramCache]: Analyzing trace with hash 478197688, now seen corresponding path program 11 times [2024-09-13 10:28:36,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:36,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467049447] [2024-09-13 10:28:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:36,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:37,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 10:28:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:37,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:37,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:37,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:37,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:37,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:37,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:37,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 7 proven. 625 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-13 10:28:38,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467049447] [2024-09-13 10:28:38,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467049447] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:38,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794069185] [2024-09-13 10:28:38,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 10:28:38,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:38,062 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:38,064 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 10:28:38,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-09-13 10:28:38,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:38,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-13 10:28:38,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-13 10:28:38,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-13 10:28:38,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794069185] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:38,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:38,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 46 [2024-09-13 10:28:38,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830196932] [2024-09-13 10:28:38,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:38,393 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 10:28:38,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 10:28:38,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2068, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 10:28:38,394 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 15 states have call successors, (15), 14 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 10:28:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:39,819 INFO L93 Difference]: Finished difference Result 142 states and 141 transitions. [2024-09-13 10:28:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-13 10:28:39,820 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 15 states have call successors, (15), 14 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2024-09-13 10:28:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:39,820 INFO L225 Difference]: With dead ends: 142 [2024-09-13 10:28:39,820 INFO L226 Difference]: Without dead ends: 142 [2024-09-13 10:28:39,821 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=5474, Unknown=0, NotChecked=0, Total=5700 [2024-09-13 10:28:39,821 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 166 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 4480 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 4517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:39,822 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 471 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4480 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 10:28:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-13 10:28:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 131. [2024-09-13 10:28:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 88 states have internal predecessors, (99), 21 states have call successors, (21), 21 states have call predecessors, (21), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-13 10:28:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2024-09-13 10:28:39,827 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 89 [2024-09-13 10:28:39,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:39,827 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2024-09-13 10:28:39,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 27 states have internal predecessors, (50), 15 states have call successors, (15), 14 states have call predecessors, (15), 9 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-13 10:28:39,827 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2024-09-13 10:28:39,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-13 10:28:39,828 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:39,828 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 1, 1, 1, 1] [2024-09-13 10:28:39,842 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-13 10:28:40,028 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 10:28:40,028 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:40,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:40,029 INFO L85 PathProgramCache]: Analyzing trace with hash -419199801, now seen corresponding path program 12 times [2024-09-13 10:28:40,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:40,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460366473] [2024-09-13 10:28:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:40,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:28:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 8 proven. 627 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-13 10:28:41,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:41,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460366473] [2024-09-13 10:28:41,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460366473] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:41,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353722455] [2024-09-13 10:28:41,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 10:28:41,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:41,443 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:41,444 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 10:28:41,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2024-09-13 10:28:41,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:41,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-13 10:28:41,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 47 proven. 17 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2024-09-13 10:28:42,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:42,780 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21