./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/id_i25_o25-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 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_i25_o25-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/id_i25_o25-1.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-5189fb6-m [2024-09-13 06:27:25,745 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 06:27:25,810 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 06:27:25,818 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 06:27:25,819 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 06:27:25,843 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 06:27:25,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 06:27:25,844 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 06:27:25,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 06:27:25,844 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 06:27:25,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 06:27:25,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 06:27:25,846 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 06:27:25,847 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 06:27:25,848 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 06:27:25,848 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 06:27:25,848 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 06:27:25,848 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 06:27:25,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 06:27:25,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 06:27:25,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 06:27:25,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 06:27:25,852 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 06:27:25,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 06:27:25,853 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 06:27:25,853 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 06:27:25,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 06:27:25,853 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 06:27:25,854 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 06:27:25,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 06:27:25,854 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 06:27:25,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 06:27:25,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:27:25,855 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 06:27:25,858 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 06:27:25,858 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 06:27:25,859 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 06:27:25,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 06:27:25,859 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 06:27:25,860 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 06:27:25,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 06:27:25,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 06:27:25,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 06:27:26,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 06:27:26,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 06:27:26,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 06:27:26,170 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 06:27:26,171 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 06:27:26,172 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2024-09-13 06:27:27,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 06:27:27,754 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 06:27:27,755 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2024-09-13 06:27:27,760 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e86541db3/0ee2bf83be314ae09f1aa96fe86c7183/FLAGbe22af9f2 [2024-09-13 06:27:27,772 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e86541db3/0ee2bf83be314ae09f1aa96fe86c7183 [2024-09-13 06:27:27,774 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 06:27:27,775 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 06:27:27,776 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/id_i25_o25-1.yml/witness-2.1.yml [2024-09-13 06:27:27,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 06:27:27,825 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 06:27:27,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 06:27:27,826 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 06:27:27,832 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 06:27:27,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:27:27" (1/2) ... [2024-09-13 06:27:27,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f933406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:27:27, skipping insertion in model container [2024-09-13 06:27:27,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:27:27" (1/2) ... [2024-09-13 06:27:27,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@75cf9cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:27:27, skipping insertion in model container [2024-09-13 06:27:27,837 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 06:27:27" (2/2) ... [2024-09-13 06:27:27,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f933406 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:27, skipping insertion in model container [2024-09-13 06:27:27,837 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 06:27:27" (2/2) ... [2024-09-13 06:27:27,844 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 06:27:27,846 INFO L1541 ArrayList]: Function contract at [L6]: requires null, ensures ((((((((((((((((((((((((((((3 == \result) && (\old(x) == 3)) || ((19 == \result) && (19 == \old(x)))) || ((\old(x) == 24) && (\result == 24))) || ((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))) || ((23 == \old(x)) && (23 == \result))) || ((10 == \result) && (\old(x) == 10))) || ((5 == \result) && (5 == \old(x)))) || ((\old(x) == 21) && (21 == \result))) || ((20 == \result) && (\old(x) == 20))) || ((\old(x) == 22) && (22 == \result))) || ((8 == \result) && (\old(x) == 8))) || (25 < \old(x))) || ((7 == \result) && (7 == \old(x)))) || ((12 == \result) && (\old(x) == 12))) || ((\result == 1) && (\old(x) == 1))) || ((14 == \result) && (\old(x) == 14))) || ((\old(x) == 25) && (25 == \result))) || ((\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 06:27:27,863 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 06:27:28,008 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_i25_o25-1.c[454,467] [2024-09-13 06:27:28,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:27:28,026 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-13 06:27:28,087 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_i25_o25-1.c[454,467] [2024-09-13 06:27:28,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:27:28,108 INFO L204 MainTranslator]: Completed translation [2024-09-13 06:27:28,110 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:27:28 WrapperNode [2024-09-13 06:27:28,110 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 06:27:28,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 06:27:28,112 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 06:27:28,112 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 06:27:28,119 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,125 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,139 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-09-13 06:27:28,140 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 06:27:28,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 06:27:28,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 06:27:28,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 06:27:28,151 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,151 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,153 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,167 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 06:27:28,167 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,168 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,176 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,177 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,177 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,182 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,184 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 06:27:28,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 06:27:28,185 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 06:27:28,185 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 06:27:28,185 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 06:27:28" (1/1) ... [2024-09-13 06:27:28,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:27:28,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:28,217 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 06:27:28,219 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 06:27:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 06:27:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 06:27:28,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 06:27:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 06:27:28,266 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-13 06:27:28,266 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-13 06:27:28,315 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 06:27:28,316 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 06:27:28,527 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-13 06:27:28,527 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 06:27:28,550 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 06:27:28,550 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 06:27:28,551 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 06:27:28 BoogieIcfgContainer [2024-09-13 06:27:28,551 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 06:27:28,556 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 06:27:28,557 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 06:27:28,560 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 06:27:28,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 06:27:27" (1/4) ... [2024-09-13 06:27:28,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef618d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 06:27:28, skipping insertion in model container [2024-09-13 06:27:28,563 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 06:27:27" (2/4) ... [2024-09-13 06:27:28,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef618d2 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 06:27:28, skipping insertion in model container [2024-09-13 06:27:28,563 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 06:27:28" (3/4) ... [2024-09-13 06:27:28,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef618d2 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 06:27:28, skipping insertion in model container [2024-09-13 06:27:28,564 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 06:27:28" (4/4) ... [2024-09-13 06:27:28,565 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2024-09-13 06:27:28,585 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 06:27:28,585 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-13 06:27:28,632 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 06:27:28,639 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;@3f5222c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 06:27:28,640 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-13 06:27:28,644 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 06:27:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 06:27:28,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:28,658 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 06:27:28,659 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:28,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 56172024, now seen corresponding path program 1 times [2024-09-13 06:27:28,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:28,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548027106] [2024-09-13 06:27:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:28,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:29,031 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 06:27:29,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:29,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548027106] [2024-09-13 06:27:29,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548027106] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:27:29,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:27:29,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 06:27:29,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452051333] [2024-09-13 06:27:29,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:27:29,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:27:29,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:29,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:27:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:27:29,080 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 06:27:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:29,171 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-09-13 06:27:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 06:27:29,174 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 06:27:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:29,179 INFO L225 Difference]: With dead ends: 22 [2024-09-13 06:27:29,179 INFO L226 Difference]: Without dead ends: 20 [2024-09-13 06:27:29,181 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 06:27:29,184 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:29,184 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:27:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-13 06:27:29,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-09-13 06:27:29,208 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 06:27:29,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-09-13 06:27:29,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2024-09-13 06:27:29,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:29,210 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-09-13 06:27:29,210 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 06:27:29,210 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-09-13 06:27:29,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-13 06:27:29,211 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:29,211 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:29,211 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 06:27:29,212 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:29,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:29,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1615449573, now seen corresponding path program 1 times [2024-09-13 06:27:29,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:29,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584782549] [2024-09-13 06:27:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:29,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:29,327 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 06:27:29,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:29,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584782549] [2024-09-13 06:27:29,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584782549] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:29,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343248346] [2024-09-13 06:27:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:29,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:29,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:29,332 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 06:27:29,335 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 06:27:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:29,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 06:27:29,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:29,440 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 06:27:29,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:29,513 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 06:27:29,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343248346] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:29,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:29,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-13 06:27:29,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458896039] [2024-09-13 06:27:29,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:29,515 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 06:27:29,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:29,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 06:27:29,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-13 06:27:29,517 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 06:27:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:29,691 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2024-09-13 06:27:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 06:27:29,692 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 06:27:29,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:29,693 INFO L225 Difference]: With dead ends: 41 [2024-09-13 06:27:29,693 INFO L226 Difference]: Without dead ends: 41 [2024-09-13 06:27:29,694 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 06:27:29,695 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 06:27:29,696 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 06:27:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-13 06:27:29,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-09-13 06:27:29,700 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 06:27:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-09-13 06:27:29,703 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2024-09-13 06:27:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:29,704 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-09-13 06:27:29,705 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 06:27:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-09-13 06:27:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 06:27:29,706 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:29,706 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2024-09-13 06:27:29,725 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 06:27:29,910 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 06:27:29,911 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:29,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1295816760, now seen corresponding path program 2 times [2024-09-13 06:27:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:29,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133162590] [2024-09-13 06:27:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:30,134 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 06:27:30,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:30,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133162590] [2024-09-13 06:27:30,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133162590] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:30,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043964037] [2024-09-13 06:27:30,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:27:30,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:30,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:30,140 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 06:27:30,142 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 06:27:30,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 06:27:30,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:30,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 06:27:30,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:30,224 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 06:27:30,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 06:27:30,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043964037] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:27:30,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 06:27:30,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 15 [2024-09-13 06:27:30,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50685397] [2024-09-13 06:27:30,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:27:30,225 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 06:27:30,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 06:27:30,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-13 06:27:30,227 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 06:27:30,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:30,263 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-09-13 06:27:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 06:27:30,264 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 06:27:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:30,267 INFO L225 Difference]: With dead ends: 39 [2024-09-13 06:27:30,267 INFO L226 Difference]: Without dead ends: 39 [2024-09-13 06:27:30,267 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 06:27:30,268 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 06:27:30,269 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 06:27:30,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-13 06:27:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-09-13 06:27:30,280 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 06:27:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-13 06:27:30,281 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 17 [2024-09-13 06:27:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:30,282 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-13 06:27:30,282 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 06:27:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-13 06:27:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 06:27:30,283 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:30,283 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:30,300 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 06:27:30,487 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 06:27:30,488 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:30,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash 511038535, now seen corresponding path program 1 times [2024-09-13 06:27:30,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:30,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427438245] [2024-09-13 06:27:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:30,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:30,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 06:27:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:30,816 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 06:27:30,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:30,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427438245] [2024-09-13 06:27:30,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427438245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:30,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930964383] [2024-09-13 06:27:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:30,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:30,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:30,820 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 06:27:30,822 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 06:27:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:30,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 06:27:30,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:30,940 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 06:27:30,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:31,199 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 06:27:31,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930964383] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:31,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:31,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-13 06:27:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759822060] [2024-09-13 06:27:31,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:31,200 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 06:27:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:31,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 06:27:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2024-09-13 06:27:31,203 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 06:27:31,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:31,642 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2024-09-13 06:27:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 06:27:31,643 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 06:27:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:31,646 INFO L225 Difference]: With dead ends: 71 [2024-09-13 06:27:31,646 INFO L226 Difference]: Without dead ends: 71 [2024-09-13 06:27:31,647 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 06:27:31,647 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, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:31,648 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 120 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 06:27:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-13 06:27:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2024-09-13 06:27:31,655 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 06:27:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2024-09-13 06:27:31,656 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 20 [2024-09-13 06:27:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:31,658 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2024-09-13 06:27:31,658 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 06:27:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2024-09-13 06:27:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 06:27:31,659 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:31,659 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:31,672 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 06:27:31,861 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 06:27:31,862 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:31,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:31,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1809419033, now seen corresponding path program 2 times [2024-09-13 06:27:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:31,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916783048] [2024-09-13 06:27:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:31,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:32,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 06:27:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:32,351 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 06:27:32,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:32,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916783048] [2024-09-13 06:27:32,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916783048] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:32,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891603437] [2024-09-13 06:27:32,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:27:32,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:32,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:32,354 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 06:27:32,356 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 06:27:32,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 06:27:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:32,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 06:27:32,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:32,518 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 06:27:32,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:33,110 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 06:27:33,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891603437] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:33,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:33,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-13 06:27:33,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773328030] [2024-09-13 06:27:33,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:33,112 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-13 06:27:33,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-13 06:27:33,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1850, Unknown=0, NotChecked=0, Total=2352 [2024-09-13 06:27:33,114 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 49 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 28 states have internal predecessors, (52), 22 states have call successors, (22), 21 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 06:27:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:34,043 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2024-09-13 06:27:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-13 06:27:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 28 states have internal predecessors, (52), 22 states have call successors, (22), 21 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 06:27:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:34,045 INFO L225 Difference]: With dead ends: 155 [2024-09-13 06:27:34,045 INFO L226 Difference]: Without dead ends: 155 [2024-09-13 06:27:34,047 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1237, Invalid=3593, Unknown=0, NotChecked=0, Total=4830 [2024-09-13 06:27:34,048 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 271 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:34,048 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 238 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 06:27:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-13 06:27:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 135. [2024-09-13 06:27:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 89 states have (on average 1.247191011235955) internal successors, (111), 91 states have internal predecessors, (111), 22 states have call successors, (22), 21 states have call predecessors, (22), 22 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2024-09-13 06:27:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2024-09-13 06:27:34,059 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 38 [2024-09-13 06:27:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:34,059 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2024-09-13 06:27:34,059 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 28 states have internal predecessors, (52), 22 states have call successors, (22), 21 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 06:27:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2024-09-13 06:27:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 06:27:34,061 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:34,061 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:27:34,077 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 06:27:34,262 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 06:27:34,262 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:34,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:34,262 INFO L85 PathProgramCache]: Analyzing trace with hash -705364284, now seen corresponding path program 3 times [2024-09-13 06:27:34,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:34,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109507018] [2024-09-13 06:27:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:34,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:35,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 06:27:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 1 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:27:35,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:35,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109507018] [2024-09-13 06:27:35,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109507018] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:35,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887807832] [2024-09-13 06:27:35,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 06:27:35,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:35,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:35,475 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 06:27:35,476 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 06:27:35,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 06:27:35,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:35,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 06:27:35,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-13 06:27:35,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2024-09-13 06:27:35,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887807832] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:35,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:35,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 5, 6] total 53 [2024-09-13 06:27:35,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122531455] [2024-09-13 06:27:35,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:35,802 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-13 06:27:35,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:35,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-13 06:27:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=2180, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 06:27:35,806 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 31 states have internal predecessors, (61), 25 states have call successors, (26), 22 states have call predecessors, (26), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 06:27:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:36,875 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2024-09-13 06:27:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-13 06:27:36,876 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 31 states have internal predecessors, (61), 25 states have call successors, (26), 22 states have call predecessors, (26), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2024-09-13 06:27:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:36,877 INFO L225 Difference]: With dead ends: 165 [2024-09-13 06:27:36,877 INFO L226 Difference]: Without dead ends: 165 [2024-09-13 06:27:36,880 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1388, Invalid=4312, Unknown=0, NotChecked=0, Total=5700 [2024-09-13 06:27:36,881 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 246 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:36,881 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 211 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 06:27:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-13 06:27:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 144. [2024-09-13 06:27:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 97 states have internal predecessors, (118), 23 states have call successors, (23), 22 states have call predecessors, (23), 24 states have return successors, (25), 24 states have call predecessors, (25), 23 states have call successors, (25) [2024-09-13 06:27:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2024-09-13 06:27:36,903 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 71 [2024-09-13 06:27:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:36,903 INFO L474 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2024-09-13 06:27:36,904 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 31 states have internal predecessors, (61), 25 states have call successors, (26), 22 states have call predecessors, (26), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 06:27:36,904 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2024-09-13 06:27:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-13 06:27:36,908 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:36,908 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 06:27:36,922 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 06:27:37,112 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 06:27:37,113 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:37,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1633787163, now seen corresponding path program 4 times [2024-09-13 06:27:37,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:37,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643480101] [2024-09-13 06:27:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:37,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:38,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-13 06:27:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:38,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 3 proven. 806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:27:38,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:38,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643480101] [2024-09-13 06:27:38,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643480101] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:38,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555286172] [2024-09-13 06:27:38,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 06:27:38,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:38,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:38,629 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 06:27:38,631 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 06:27:38,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 06:27:38,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:38,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-13 06:27:38,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 3 proven. 805 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 06:27:38,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 3 proven. 806 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:27:39,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555286172] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:39,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:39,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 58 [2024-09-13 06:27:39,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56271019] [2024-09-13 06:27:39,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:39,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-13 06:27:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:39,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-13 06:27:39,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2623, Unknown=0, NotChecked=0, Total=3306 [2024-09-13 06:27:39,909 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand has 58 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 34 states have internal predecessors, (65), 28 states have call successors, (29), 24 states have call predecessors, (29), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 06:27:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:40,950 INFO L93 Difference]: Finished difference Result 179 states and 180 transitions. [2024-09-13 06:27:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-13 06:27:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 34 states have internal predecessors, (65), 28 states have call successors, (29), 24 states have call predecessors, (29), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 80 [2024-09-13 06:27:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:40,952 INFO L225 Difference]: With dead ends: 179 [2024-09-13 06:27:40,952 INFO L226 Difference]: Without dead ends: 179 [2024-09-13 06:27:40,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 110 SyntacticMatches, 44 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1657, Invalid=4985, Unknown=0, NotChecked=0, Total=6642 [2024-09-13 06:27:40,955 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 308 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:40,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 264 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 06:27:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-13 06:27:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 156. [2024-09-13 06:27:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 103 states have (on average 1.2427184466019416) internal successors, (128), 105 states have internal predecessors, (128), 25 states have call successors, (25), 24 states have call predecessors, (25), 26 states have return successors, (27), 26 states have call predecessors, (27), 25 states have call successors, (27) [2024-09-13 06:27:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 180 transitions. [2024-09-13 06:27:40,975 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 180 transitions. Word has length 80 [2024-09-13 06:27:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:40,975 INFO L474 AbstractCegarLoop]: Abstraction has 156 states and 180 transitions. [2024-09-13 06:27:40,976 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 34 states have internal predecessors, (65), 28 states have call successors, (29), 24 states have call predecessors, (29), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 06:27:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 180 transitions. [2024-09-13 06:27:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-13 06:27:40,977 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:40,977 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 06:27:40,996 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 06:27:41,178 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 06:27:41,178 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:41,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:41,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1820573701, now seen corresponding path program 5 times [2024-09-13 06:27:41,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:41,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856343362] [2024-09-13 06:27:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:41,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:42,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-13 06:27:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:42,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 1 proven. 953 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:27:42,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:42,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856343362] [2024-09-13 06:27:42,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856343362] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:42,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675354225] [2024-09-13 06:27:42,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 06:27:42,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:42,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:42,753 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 06:27:42,754 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 06:27:42,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2024-09-13 06:27:42,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:42,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-13 06:27:42,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 0 proven. 953 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 06:27:43,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 0 proven. 953 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 06:27:43,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675354225] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:43,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:43,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2024-09-13 06:27:43,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328678188] [2024-09-13 06:27:43,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:43,148 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-13 06:27:43,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:43,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-13 06:27:43,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3078, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 06:27:43,151 INFO L87 Difference]: Start difference. First operand 156 states and 180 transitions. Second operand has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 26 states have call successors, (26), 25 states have call predecessors, (26), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:27:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:46,283 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2024-09-13 06:27:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-13 06:27:46,284 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 26 states have call successors, (26), 25 states have call predecessors, (26), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 86 [2024-09-13 06:27:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:46,287 INFO L225 Difference]: With dead ends: 188 [2024-09-13 06:27:46,287 INFO L226 Difference]: Without dead ends: 188 [2024-09-13 06:27:46,289 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=253, Invalid=6887, Unknown=0, NotChecked=0, Total=7140 [2024-09-13 06:27:46,290 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 224 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 7801 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 7854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 7801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:46,290 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1289 Invalid, 7854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 7801 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-13 06:27:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-09-13 06:27:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2024-09-13 06:27:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 109 states have (on average 1.238532110091743) internal successors, (135), 110 states have internal predecessors, (135), 26 states have call successors, (26), 25 states have call predecessors, (26), 27 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2024-09-13 06:27:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2024-09-13 06:27:46,304 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 86 [2024-09-13 06:27:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:46,305 INFO L474 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2024-09-13 06:27:46,305 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 26 states have call successors, (26), 25 states have call predecessors, (26), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:27:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2024-09-13 06:27:46,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-13 06:27:46,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:46,309 INFO L216 NwaCegarLoop]: trace histogram [27, 26, 26, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 06:27:46,325 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 06:27:46,509 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 06:27:46,510 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:46,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:46,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1129000504, now seen corresponding path program 6 times [2024-09-13 06:27:46,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:46,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666676321] [2024-09-13 06:27:46,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:46,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:47,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-13 06:27:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:47,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 903 proven. 128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:27:47,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:47,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666676321] [2024-09-13 06:27:47,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666676321] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:47,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442927946] [2024-09-13 06:27:47,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 06:27:47,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:47,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:47,781 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 06:27:47,783 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 06:27:47,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 06:27:47,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:47,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-13 06:27:47,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 120 proven. 5 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2024-09-13 06:27:48,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 120 proven. 9 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2024-09-13 06:27:48,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442927946] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:48,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:48,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 9] total 65 [2024-09-13 06:27:48,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549762942] [2024-09-13 06:27:48,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:48,249 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-13 06:27:48,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:48,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-13 06:27:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=894, Invalid=3266, Unknown=0, NotChecked=0, Total=4160 [2024-09-13 06:27:48,252 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 38 states have internal predecessors, (75), 30 states have call successors, (31), 26 states have call predecessors, (31), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 06:27:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:49,486 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2024-09-13 06:27:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-09-13 06:27:49,487 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.171875) internal successors, (75), 38 states have internal predecessors, (75), 30 states have call successors, (31), 26 states have call predecessors, (31), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 89 [2024-09-13 06:27:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:49,488 INFO L225 Difference]: With dead ends: 181 [2024-09-13 06:27:49,488 INFO L226 Difference]: Without dead ends: 181 [2024-09-13 06:27:49,491 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3706, Invalid=9866, Unknown=0, NotChecked=0, Total=13572 [2024-09-13 06:27:49,491 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 870 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:49,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 119 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 06:27:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-13 06:27:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 159. [2024-09-13 06:27:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.2285714285714286) internal successors, (129), 107 states have internal predecessors, (129), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:27:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 181 transitions. [2024-09-13 06:27:49,498 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 181 transitions. Word has length 89 [2024-09-13 06:27:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:49,498 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 181 transitions. [2024-09-13 06:27:49,499 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.171875) internal successors, (75), 38 states have internal predecessors, (75), 30 states have call successors, (31), 26 states have call predecessors, (31), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 06:27:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 181 transitions. [2024-09-13 06:27:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-13 06:27:49,500 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:49,500 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 3, 3, 3, 1, 1, 1, 1] [2024-09-13 06:27:49,516 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 06:27:49,704 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 06:27:49,705 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:49,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:49,705 INFO L85 PathProgramCache]: Analyzing trace with hash 135885220, now seen corresponding path program 7 times [2024-09-13 06:27:49,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:49,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62913144] [2024-09-13 06:27:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:49,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:51,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 06:27:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:51,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:51,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 2 proven. 955 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 06:27:51,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:51,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62913144] [2024-09-13 06:27:51,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62913144] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:51,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257960023] [2024-09-13 06:27:51,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 06:27:51,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:51,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:51,366 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 06:27:51,367 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 06:27:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:51,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-13 06:27:51,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 955 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 06:27:51,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 955 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 06:27:51,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257960023] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:51,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:51,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2024-09-13 06:27:51,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186394022] [2024-09-13 06:27:51,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:51,683 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-13 06:27:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-13 06:27:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3078, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 06:27:51,684 INFO L87 Difference]: Start difference. First operand 159 states and 181 transitions. Second operand has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 25 states have call successors, (25), 24 states have call predecessors, (25), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 06:27:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:54,639 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2024-09-13 06:27:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-13 06:27:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 25 states have call successors, (25), 24 states have call predecessors, (25), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 89 [2024-09-13 06:27:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:54,641 INFO L225 Difference]: With dead ends: 180 [2024-09-13 06:27:54,641 INFO L226 Difference]: Without dead ends: 180 [2024-09-13 06:27:54,642 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=256, Invalid=7054, Unknown=0, NotChecked=0, Total=7310 [2024-09-13 06:27:54,643 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 277 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 7919 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 7986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 7919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:54,643 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1204 Invalid, 7986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 7919 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-13 06:27:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-09-13 06:27:54,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 159. [2024-09-13 06:27:54,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 107 states have internal predecessors, (128), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:27:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2024-09-13 06:27:54,649 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 89 [2024-09-13 06:27:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:54,649 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2024-09-13 06:27:54,650 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 25 states have call successors, (25), 24 states have call predecessors, (25), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 06:27:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2024-09-13 06:27:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-13 06:27:54,651 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:54,651 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 4, 4, 4, 1, 1, 1, 1] [2024-09-13 06:27:54,666 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 06:27:54,851 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 06:27:54,852 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:54,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1997573285, now seen corresponding path program 8 times [2024-09-13 06:27:54,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:54,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530977916] [2024-09-13 06:27:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:54,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-13 06:27:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:27:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:27:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 3 proven. 957 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 06:27:56,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:27:56,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530977916] [2024-09-13 06:27:56,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530977916] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:27:56,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067960447] [2024-09-13 06:27:56,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:27:56,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:27:56,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:27:56,491 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 06:27:56,493 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 06:27:56,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 06:27:56,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:27:56,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-13 06:27:56,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:27:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 957 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 06:27:56,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:27:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 957 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 06:27:56,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067960447] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:27:56,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:27:56,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2024-09-13 06:27:56,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008376170] [2024-09-13 06:27:56,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:27:56,807 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-13 06:27:56,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:27:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-13 06:27:56,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3078, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 06:27:56,808 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 24 states have call successors, (24), 23 states have call predecessors, (24), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 06:27:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:27:59,629 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2024-09-13 06:27:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-13 06:27:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 24 states have call successors, (24), 23 states have call predecessors, (24), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 92 [2024-09-13 06:27:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:27:59,631 INFO L225 Difference]: With dead ends: 179 [2024-09-13 06:27:59,631 INFO L226 Difference]: Without dead ends: 179 [2024-09-13 06:27:59,632 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=259, Invalid=7223, Unknown=0, NotChecked=0, Total=7482 [2024-09-13 06:27:59,632 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 266 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 7960 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 8024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 7960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-13 06:27:59,632 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1120 Invalid, 8024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 7960 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-13 06:27:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-13 06:27:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 159. [2024-09-13 06:27:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 107 states have internal predecessors, (127), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:27:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 179 transitions. [2024-09-13 06:27:59,638 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 179 transitions. Word has length 92 [2024-09-13 06:27:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:27:59,638 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 179 transitions. [2024-09-13 06:27:59,638 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 24 states have call successors, (24), 23 states have call predecessors, (24), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 06:27:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 179 transitions. [2024-09-13 06:27:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-13 06:27:59,639 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:27:59,639 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 5, 5, 5, 1, 1, 1, 1] [2024-09-13 06:27:59,655 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 06:27:59,840 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 06:27:59,840 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:27:59,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:27:59,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1361117764, now seen corresponding path program 9 times [2024-09-13 06:27:59,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:27:59,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050130352] [2024-09-13 06:27:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:27:59,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:27:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:01,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 06:28:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:01,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:01,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:01,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:01,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 4 proven. 959 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 06:28:01,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:28:01,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050130352] [2024-09-13 06:28:01,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050130352] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:28:01,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626946478] [2024-09-13 06:28:01,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 06:28:01,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:01,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:28:01,628 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 06:28:01,629 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 06:28:01,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-13 06:28:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:28:01,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 06:28:01,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:28:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 220 proven. 35 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2024-09-13 06:28:02,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:28:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 220 proven. 60 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2024-09-13 06:28:02,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626946478] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:28:02,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:28:02,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 13, 18] total 69 [2024-09-13 06:28:02,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260024781] [2024-09-13 06:28:02,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:28:02,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-09-13 06:28:02,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:28:02,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-09-13 06:28:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=4545, Unknown=0, NotChecked=0, Total=4830 [2024-09-13 06:28:02,657 INFO L87 Difference]: Start difference. First operand 159 states and 179 transitions. Second operand has 70 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 41 states have internal predecessors, (80), 29 states have call successors, (30), 22 states have call predecessors, (30), 9 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-13 06:28:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:28:05,319 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2024-09-13 06:28:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-13 06:28:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 41 states have internal predecessors, (80), 29 states have call successors, (30), 22 states have call predecessors, (30), 9 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) Word has length 95 [2024-09-13 06:28:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:28:05,321 INFO L225 Difference]: With dead ends: 178 [2024-09-13 06:28:05,321 INFO L226 Difference]: Without dead ends: 178 [2024-09-13 06:28:05,322 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=627, Invalid=9473, Unknown=0, NotChecked=0, Total=10100 [2024-09-13 06:28:05,322 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 451 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 7203 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 7342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 7203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:28:05,323 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 966 Invalid, 7342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 7203 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-13 06:28:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-13 06:28:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 159. [2024-09-13 06:28:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.2) internal successors, (126), 107 states have internal predecessors, (126), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:28:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 178 transitions. [2024-09-13 06:28:05,328 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 178 transitions. Word has length 95 [2024-09-13 06:28:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:28:05,328 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 178 transitions. [2024-09-13 06:28:05,328 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 41 states have internal predecessors, (80), 29 states have call successors, (30), 22 states have call predecessors, (30), 9 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-13 06:28:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 178 transitions. [2024-09-13 06:28:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-13 06:28:05,331 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:28:05,331 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 6, 6, 1, 1, 1, 1] [2024-09-13 06:28:05,347 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 06:28:05,531 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 06:28:05,531 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:28:05,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:28:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash 273063611, now seen corresponding path program 10 times [2024-09-13 06:28:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:28:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485973717] [2024-09-13 06:28:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:28:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:28:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:06,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-13 06:28:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:06,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:06,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:06,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:07,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:07,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 5 proven. 961 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-13 06:28:07,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:28:07,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485973717] [2024-09-13 06:28:07,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485973717] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:28:07,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54218648] [2024-09-13 06:28:07,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 06:28:07,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:07,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:28:07,305 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 06:28:07,307 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 06:28:07,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 06:28:07,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:28:07,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 06:28:07,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:28:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 247 proven. 51 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-09-13 06:28:07,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:28:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 247 proven. 87 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2024-09-13 06:28:08,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54218648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:28:08,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:28:08,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 15, 21] total 72 [2024-09-13 06:28:08,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880881008] [2024-09-13 06:28:08,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:28:08,528 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-13 06:28:08,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:28:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-13 06:28:08,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=4947, Unknown=0, NotChecked=0, Total=5256 [2024-09-13 06:28:08,530 INFO L87 Difference]: Start difference. First operand 159 states and 178 transitions. Second operand has 73 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 43 states have internal predecessors, (84), 29 states have call successors, (30), 21 states have call predecessors, (30), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-13 06:28:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:28:11,425 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2024-09-13 06:28:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-13 06:28:11,425 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 43 states have internal predecessors, (84), 29 states have call successors, (30), 21 states have call predecessors, (30), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) Word has length 98 [2024-09-13 06:28:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:28:11,426 INFO L225 Difference]: With dead ends: 177 [2024-09-13 06:28:11,426 INFO L226 Difference]: Without dead ends: 177 [2024-09-13 06:28:11,427 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=694, Invalid=10226, Unknown=0, NotChecked=0, Total=10920 [2024-09-13 06:28:11,427 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 360 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 8256 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 8363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 8256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-13 06:28:11,428 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 899 Invalid, 8363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 8256 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-13 06:28:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-13 06:28:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 159. [2024-09-13 06:28:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 107 states have internal predecessors, (125), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:28:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2024-09-13 06:28:11,432 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 98 [2024-09-13 06:28:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:28:11,433 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2024-09-13 06:28:11,433 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 43 states have internal predecessors, (84), 29 states have call successors, (30), 21 states have call predecessors, (30), 11 states have return successors, (18), 11 states have call predecessors, (18), 9 states have call successors, (18) [2024-09-13 06:28:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2024-09-13 06:28:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-13 06:28:11,434 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:28:11,434 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 7, 7, 7, 1, 1, 1, 1] [2024-09-13 06:28:11,449 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 06:28:11,635 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 06:28:11,635 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:28:11,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:28:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash 169974500, now seen corresponding path program 11 times [2024-09-13 06:28:11,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:28:11,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645551074] [2024-09-13 06:28:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:28:11,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:28:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:12,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-13 06:28:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:12,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:13,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:13,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:13,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:13,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:13,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 6 proven. 963 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 06:28:13,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:28:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645551074] [2024-09-13 06:28:13,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645551074] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:28:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298600491] [2024-09-13 06:28:13,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 06:28:13,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:13,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:28:13,485 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 06:28:13,487 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 06:28:13,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2024-09-13 06:28:13,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:28:13,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-13 06:28:13,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:28:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 963 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-13 06:28:13,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:28:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 963 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-13 06:28:13,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298600491] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:28:13,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:28:13,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2024-09-13 06:28:13,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907569610] [2024-09-13 06:28:13,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:28:13,896 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-13 06:28:13,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:28:13,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-13 06:28:13,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3078, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 06:28:13,896 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 21 states have call successors, (21), 20 states have call predecessors, (21), 8 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 06:28:16,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:28:16,516 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2024-09-13 06:28:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-13 06:28:16,517 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 21 states have call successors, (21), 20 states have call predecessors, (21), 8 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2024-09-13 06:28:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:28:16,518 INFO L225 Difference]: With dead ends: 176 [2024-09-13 06:28:16,518 INFO L226 Difference]: Without dead ends: 176 [2024-09-13 06:28:16,519 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=268, Invalid=7742, Unknown=0, NotChecked=0, Total=8010 [2024-09-13 06:28:16,519 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 237 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 7266 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 7321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 7266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:28:16,519 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 877 Invalid, 7321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 7266 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-13 06:28:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-09-13 06:28:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2024-09-13 06:28:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.180952380952381) internal successors, (124), 107 states have internal predecessors, (124), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:28:16,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 176 transitions. [2024-09-13 06:28:16,524 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 176 transitions. Word has length 101 [2024-09-13 06:28:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:28:16,525 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 176 transitions. [2024-09-13 06:28:16,525 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 21 states have call successors, (21), 20 states have call predecessors, (21), 8 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 06:28:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 176 transitions. [2024-09-13 06:28:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-13 06:28:16,526 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:28:16,526 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 8, 8, 8, 1, 1, 1, 1] [2024-09-13 06:28:16,544 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 06:28:16,726 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 06:28:16,727 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:28:16,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:28:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash -56114661, now seen corresponding path program 12 times [2024-09-13 06:28:16,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:28:16,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153922678] [2024-09-13 06:28:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:28:16,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:28:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:17,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 06:28:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:17,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:18,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:18,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:18,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:18,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:18,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:18,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 7 proven. 965 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-13 06:28:18,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:28:18,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153922678] [2024-09-13 06:28:18,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153922678] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:28:18,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831778938] [2024-09-13 06:28:18,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 06:28:18,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:18,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:28:18,773 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 06:28:18,775 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 06:28:18,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2024-09-13 06:28:18,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:28:18,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-13 06:28:18,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:28:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 289 proven. 92 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2024-09-13 06:28:19,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:28:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 289 proven. 156 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2024-09-13 06:28:20,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831778938] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:28:20,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:28:20,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 19, 27] total 78 [2024-09-13 06:28:20,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630966007] [2024-09-13 06:28:20,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:28:20,570 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-09-13 06:28:20,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:28:20,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-09-13 06:28:20,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=5811, Unknown=0, NotChecked=0, Total=6162 [2024-09-13 06:28:20,571 INFO L87 Difference]: Start difference. First operand 159 states and 176 transitions. Second operand has 79 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 47 states have internal predecessors, (92), 29 states have call successors, (30), 19 states have call predecessors, (30), 15 states have return successors, (24), 15 states have call predecessors, (24), 11 states have call successors, (24) [2024-09-13 06:28:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:28:23,358 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2024-09-13 06:28:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-13 06:28:23,359 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 47 states have internal predecessors, (92), 29 states have call successors, (30), 19 states have call predecessors, (30), 15 states have return successors, (24), 15 states have call predecessors, (24), 11 states have call successors, (24) Word has length 104 [2024-09-13 06:28:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:28:23,360 INFO L225 Difference]: With dead ends: 175 [2024-09-13 06:28:23,360 INFO L226 Difference]: Without dead ends: 175 [2024-09-13 06:28:23,360 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=828, Invalid=11828, Unknown=0, NotChecked=0, Total=12656 [2024-09-13 06:28:23,361 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 375 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 7706 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 7822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 7706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:28:23,361 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 771 Invalid, 7822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 7706 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-13 06:28:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-09-13 06:28:23,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 159. [2024-09-13 06:28:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 107 states have internal predecessors, (123), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:28:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2024-09-13 06:28:23,370 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 104 [2024-09-13 06:28:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:28:23,371 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2024-09-13 06:28:23,371 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 47 states have internal predecessors, (92), 29 states have call successors, (30), 19 states have call predecessors, (30), 15 states have return successors, (24), 15 states have call predecessors, (24), 11 states have call successors, (24) [2024-09-13 06:28:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2024-09-13 06:28:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-13 06:28:23,372 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:28:23,372 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 9, 9, 9, 1, 1, 1, 1] [2024-09-13 06:28:23,390 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 06:28:23,573 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 06:28:23,573 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:28:23,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:28:23,574 INFO L85 PathProgramCache]: Analyzing trace with hash -969589884, now seen corresponding path program 13 times [2024-09-13 06:28:23,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:28:23,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98592880] [2024-09-13 06:28:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:28:23,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:28:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:24,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 06:28:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:24,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:24,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:25,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:25,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:25,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:25,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:25,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:25,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 8 proven. 967 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-13 06:28:25,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:28:25,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98592880] [2024-09-13 06:28:25,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98592880] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:28:25,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815793423] [2024-09-13 06:28:25,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 06:28:25,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:25,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:28:25,603 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:28:25,604 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 06:28:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:25,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-13 06:28:25,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:28:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 967 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-13 06:28:25,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:28:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 967 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-13 06:28:26,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815793423] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:28:26,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:28:26,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2024-09-13 06:28:26,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200482432] [2024-09-13 06:28:26,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:28:26,059 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-13 06:28:26,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:28:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-13 06:28:26,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3078, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 06:28:26,060 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 19 states have call successors, (19), 18 states have call predecessors, (19), 10 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 06:28:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:28:28,728 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2024-09-13 06:28:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-13 06:28:28,728 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 19 states have call successors, (19), 18 states have call predecessors, (19), 10 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) Word has length 107 [2024-09-13 06:28:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:28:28,729 INFO L225 Difference]: With dead ends: 174 [2024-09-13 06:28:28,729 INFO L226 Difference]: Without dead ends: 174 [2024-09-13 06:28:28,729 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=8098, Unknown=0, NotChecked=0, Total=8372 [2024-09-13 06:28:28,730 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 217 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 7139 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 7188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 7139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:28:28,730 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 742 Invalid, 7188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 7139 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-13 06:28:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-09-13 06:28:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 159. [2024-09-13 06:28:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.161904761904762) internal successors, (122), 107 states have internal predecessors, (122), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:28:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 174 transitions. [2024-09-13 06:28:28,735 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 174 transitions. Word has length 107 [2024-09-13 06:28:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:28:28,736 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 174 transitions. [2024-09-13 06:28:28,736 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 19 states have call successors, (19), 18 states have call predecessors, (19), 10 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 06:28:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 174 transitions. [2024-09-13 06:28:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-13 06:28:28,738 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:28:28,738 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 10, 10, 10, 1, 1, 1, 1] [2024-09-13 06:28:28,755 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-13 06:28:28,938 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 06:28:28,938 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:28:28,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:28:28,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1397170821, now seen corresponding path program 14 times [2024-09-13 06:28:28,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:28:28,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880942951] [2024-09-13 06:28:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:28:28,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:28:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:29,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-13 06:28:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:30,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:30,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:30,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:30,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:30,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:30,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:30,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:30,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:31,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 9 proven. 969 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-13 06:28:31,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:28:31,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880942951] [2024-09-13 06:28:31,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880942951] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:28:31,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868310681] [2024-09-13 06:28:31,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:28:31,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:31,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:28:31,125 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:28:31,127 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 06:28:31,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 06:28:31,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:28:31,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-13 06:28:31,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:28:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-13 06:28:31,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:28:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-13 06:28:31,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868310681] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:28:31,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:28:31,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2024-09-13 06:28:31,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594144773] [2024-09-13 06:28:31,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:28:31,673 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-13 06:28:31,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:28:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-13 06:28:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3078, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 06:28:31,674 INFO L87 Difference]: Start difference. First operand 159 states and 174 transitions. Second operand has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 18 states have call successors, (18), 17 states have call predecessors, (18), 11 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 06:28:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:28:34,302 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2024-09-13 06:28:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-13 06:28:34,303 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 18 states have call successors, (18), 17 states have call predecessors, (18), 11 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2024-09-13 06:28:34,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:28:34,303 INFO L225 Difference]: With dead ends: 173 [2024-09-13 06:28:34,303 INFO L226 Difference]: Without dead ends: 173 [2024-09-13 06:28:34,304 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=277, Invalid=8279, Unknown=0, NotChecked=0, Total=8556 [2024-09-13 06:28:34,304 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 207 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 6854 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 6900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-13 06:28:34,305 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 676 Invalid, 6900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6854 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-13 06:28:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-13 06:28:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2024-09-13 06:28:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.1523809523809523) internal successors, (121), 107 states have internal predecessors, (121), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:28:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 173 transitions. [2024-09-13 06:28:34,309 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 173 transitions. Word has length 110 [2024-09-13 06:28:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:28:34,309 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 173 transitions. [2024-09-13 06:28:34,310 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 18 states have call successors, (18), 17 states have call predecessors, (18), 11 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 06:28:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 173 transitions. [2024-09-13 06:28:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-13 06:28:34,311 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:28:34,311 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 11, 11, 11, 1, 1, 1, 1] [2024-09-13 06:28:34,328 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-13 06:28:34,511 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:34,512 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:28:34,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:28:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash -587865052, now seen corresponding path program 15 times [2024-09-13 06:28:34,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:28:34,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170463714] [2024-09-13 06:28:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:28:34,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:28:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:35,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-13 06:28:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:35,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:35,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:35,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:35,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:36,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:36,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:36,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:36,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:36,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:36,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 10 proven. 971 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-13 06:28:36,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:28:36,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170463714] [2024-09-13 06:28:36,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170463714] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:28:36,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114428452] [2024-09-13 06:28:36,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 06:28:36,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:36,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:28:36,734 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:28:36,736 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 06:28:36,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-09-13 06:28:36,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:28:36,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-13 06:28:36,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:28:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 322 proven. 176 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2024-09-13 06:28:37,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:28:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 322 proven. 297 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2024-09-13 06:28:39,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114428452] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:28:39,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:28:39,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 25, 36] total 87 [2024-09-13 06:28:39,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574456998] [2024-09-13 06:28:39,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:28:39,513 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-09-13 06:28:39,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:28:39,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-09-13 06:28:39,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=7257, Unknown=0, NotChecked=0, Total=7656 [2024-09-13 06:28:39,516 INFO L87 Difference]: Start difference. First operand 159 states and 173 transitions. Second operand has 88 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 53 states have internal predecessors, (104), 29 states have call successors, (30), 16 states have call predecessors, (30), 21 states have return successors, (33), 21 states have call predecessors, (33), 14 states have call successors, (33) [2024-09-13 06:28:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:28:42,285 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2024-09-13 06:28:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-13 06:28:42,285 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 53 states have internal predecessors, (104), 29 states have call successors, (30), 16 states have call predecessors, (30), 21 states have return successors, (33), 21 states have call predecessors, (33), 14 states have call successors, (33) Word has length 113 [2024-09-13 06:28:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:28:42,286 INFO L225 Difference]: With dead ends: 172 [2024-09-13 06:28:42,286 INFO L226 Difference]: Without dead ends: 172 [2024-09-13 06:28:42,287 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1029, Invalid=14471, Unknown=0, NotChecked=0, Total=15500 [2024-09-13 06:28:42,288 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 662 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 7215 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 7453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 7215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:28:42,288 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 596 Invalid, 7453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 7215 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-13 06:28:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-13 06:28:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 159. [2024-09-13 06:28:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 107 states have internal predecessors, (120), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:28:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 172 transitions. [2024-09-13 06:28:42,292 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 172 transitions. Word has length 113 [2024-09-13 06:28:42,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:28:42,293 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 172 transitions. [2024-09-13 06:28:42,293 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 53 states have internal predecessors, (104), 29 states have call successors, (30), 16 states have call predecessors, (30), 21 states have return successors, (33), 21 states have call predecessors, (33), 14 states have call successors, (33) [2024-09-13 06:28:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 172 transitions. [2024-09-13 06:28:42,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-09-13 06:28:42,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:28:42,294 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 12, 12, 12, 1, 1, 1, 1] [2024-09-13 06:28:42,309 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-13 06:28:42,494 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-13 06:28:42,495 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:28:42,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:28:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1788866779, now seen corresponding path program 16 times [2024-09-13 06:28:42,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:28:42,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816086145] [2024-09-13 06:28:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:28:42,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:28:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:43,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 06:28:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:43,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:44,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:44,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:44,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:44,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:44,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:44,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:44,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:45,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:45,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:45,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 11 proven. 973 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-13 06:28:45,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:28:45,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816086145] [2024-09-13 06:28:45,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816086145] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:28:45,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321661100] [2024-09-13 06:28:45,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 06:28:45,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:45,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:28:45,271 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:28:45,272 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 06:28:45,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 06:28:45,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:28:45,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-13 06:28:45,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:28:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 325 proven. 210 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2024-09-13 06:28:46,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:28:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 325 proven. 354 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2024-09-13 06:28:48,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321661100] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:28:48,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:28:48,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 27, 39] total 90 [2024-09-13 06:28:48,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252181401] [2024-09-13 06:28:48,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:28:48,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-09-13 06:28:48,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:28:48,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-09-13 06:28:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=7779, Unknown=0, NotChecked=0, Total=8190 [2024-09-13 06:28:48,284 INFO L87 Difference]: Start difference. First operand 159 states and 172 transitions. Second operand has 91 states, 89 states have (on average 1.2134831460674158) internal successors, (108), 55 states have internal predecessors, (108), 29 states have call successors, (30), 15 states have call predecessors, (30), 23 states have return successors, (36), 23 states have call predecessors, (36), 15 states have call successors, (36) [2024-09-13 06:28:51,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:28:51,403 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2024-09-13 06:28:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-13 06:28:51,403 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 89 states have (on average 1.2134831460674158) internal successors, (108), 55 states have internal predecessors, (108), 29 states have call successors, (30), 15 states have call predecessors, (30), 23 states have return successors, (36), 23 states have call predecessors, (36), 15 states have call successors, (36) Word has length 116 [2024-09-13 06:28:51,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:28:51,404 INFO L225 Difference]: With dead ends: 171 [2024-09-13 06:28:51,404 INFO L226 Difference]: Without dead ends: 171 [2024-09-13 06:28:51,405 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1096, Invalid=15416, Unknown=0, NotChecked=0, Total=16512 [2024-09-13 06:28:51,405 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 600 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 8105 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 8322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 8105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:28:51,406 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 563 Invalid, 8322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 8105 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-13 06:28:51,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-13 06:28:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 159. [2024-09-13 06:28:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 107 states have internal predecessors, (119), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:28:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 171 transitions. [2024-09-13 06:28:51,410 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 171 transitions. Word has length 116 [2024-09-13 06:28:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:28:51,411 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 171 transitions. [2024-09-13 06:28:51,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 89 states have (on average 1.2134831460674158) internal successors, (108), 55 states have internal predecessors, (108), 29 states have call successors, (30), 15 states have call predecessors, (30), 23 states have return successors, (36), 23 states have call predecessors, (36), 15 states have call successors, (36) [2024-09-13 06:28:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 171 transitions. [2024-09-13 06:28:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-09-13 06:28:51,412 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:28:51,412 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 13, 13, 13, 1, 1, 1, 1] [2024-09-13 06:28:51,429 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-13 06:28:51,616 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:51,617 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:28:51,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:28:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash 176002244, now seen corresponding path program 17 times [2024-09-13 06:28:51,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:28:51,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313854334] [2024-09-13 06:28:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:28:51,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:28:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:52,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 06:28:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:52,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:52,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:53,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:53,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:53,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:53,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:53,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:53,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:53,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:53,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:54,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:54,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 12 proven. 975 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-13 06:28:54,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:28:54,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313854334] [2024-09-13 06:28:54,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313854334] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:28:54,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071972484] [2024-09-13 06:28:54,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 06:28:54,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:54,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:28:54,192 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:28:54,194 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 06:28:54,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2024-09-13 06:28:54,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:28:54,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-13 06:28:54,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:28:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-13 06:28:54,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:28:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-13 06:28:54,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071972484] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:28:54,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:28:54,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2024-09-13 06:28:54,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747675365] [2024-09-13 06:28:54,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:28:54,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-13 06:28:54,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:28:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-13 06:28:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3078, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 06:28:54,952 INFO L87 Difference]: Start difference. First operand 159 states and 171 transitions. Second operand has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 15 states have call successors, (15), 14 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2024-09-13 06:28:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:28:57,571 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2024-09-13 06:28:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-13 06:28:57,572 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 15 states have call successors, (15), 14 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) Word has length 119 [2024-09-13 06:28:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:28:57,573 INFO L225 Difference]: With dead ends: 170 [2024-09-13 06:28:57,573 INFO L226 Difference]: Without dead ends: 170 [2024-09-13 06:28:57,573 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=286, Invalid=8834, Unknown=0, NotChecked=0, Total=9120 [2024-09-13 06:28:57,573 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 176 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 6664 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 6701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 6664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-13 06:28:57,574 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 517 Invalid, 6701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 6664 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-13 06:28:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-13 06:28:57,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2024-09-13 06:28:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 105 states have (on average 1.1238095238095238) internal successors, (118), 107 states have internal predecessors, (118), 26 states have call successors, (26), 25 states have call predecessors, (26), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-13 06:28:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2024-09-13 06:28:57,577 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 119 [2024-09-13 06:28:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:28:57,578 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2024-09-13 06:28:57,578 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 32 states have internal predecessors, (60), 15 states have call successors, (15), 14 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2024-09-13 06:28:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2024-09-13 06:28:57,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-09-13 06:28:57,578 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:28:57,579 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 14, 14, 14, 1, 1, 1, 1] [2024-09-13 06:28:57,597 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-13 06:28:57,779 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:28:57,780 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting idErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, idErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:28:57,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:28:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash -872219589, now seen corresponding path program 18 times [2024-09-13 06:28:57,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:28:57,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7920052] [2024-09-13 06:28:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:28:57,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:28:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:58,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 06:28:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:58,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:59,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:59,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:59,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:59,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:59,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:28:59,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:28:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:29:00,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:29:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:29:00,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:29:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:29:00,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:29:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:29:00,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:29:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:29:00,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:29:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:29:00,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 06:29:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:29:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 13 proven. 977 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-13 06:29:00,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:29:00,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7920052] [2024-09-13 06:29:00,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7920052] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:29:00,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774392162] [2024-09-13 06:29:00,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 06:29:00,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:29:00,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:29:00,671 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:29:00,673 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 06:29:00,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-13 06:29:00,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:29:00,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 06:29:00,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:29:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 62 proven. 27 refuted. 0 times theorem prover too weak. 1148 trivial. 0 not checked. [2024-09-13 06:29:01,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:29:02,688 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 26